AI/참고/playwright-main/browser_patches/webkit/patches/bootstrap.diff

diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
index c257f6a5a523ce12f67857e0d344aadffea6601a..f8c46e22eb4fa79c6b9f56846828391c3bf4de21 100644
--- a/Source/JavaScriptCore/CMakeLists.txt
+++ b/Source/JavaScriptCore/CMakeLists.txt
@@ -1615,21 +1615,26 @@ set(JavaScriptCore_INSPECTOR_DOMAINS
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/CSS.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Canvas.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Console.json
+    ${JAVASCRIPTCORE_DIR}/inspector/protocol/Dialog.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/DOM.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/DOMDebugger.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/DOMStorage.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Debugger.json
+    ${JAVASCRIPTCORE_DIR}/inspector/protocol/Emulation.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/GenericTypes.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Heap.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/IndexedDB.json
+    ${JAVASCRIPTCORE_DIR}/inspector/protocol/Input.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Inspector.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/LayerTree.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Memory.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Network.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Page.json
+    ${JAVASCRIPTCORE_DIR}/inspector/protocol/Playwright.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Recording.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Runtime.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/ScriptProfiler.json
+    ${JAVASCRIPTCORE_DIR}/inspector/protocol/Screencast.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Security.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/ServiceWorker.json
     ${JAVASCRIPTCORE_DIR}/inspector/protocol/Target.json
diff --git a/Source/JavaScriptCore/DerivedSources-input.xcfilelist b/Source/JavaScriptCore/DerivedSources-input.xcfilelist
index 55eacb0d378fddea15ece56db612655ac5d64061..cb6cfa7c542e82671f68984ff9373e1bf58da2b8 100644
--- a/Source/JavaScriptCore/DerivedSources-input.xcfilelist
+++ b/Source/JavaScriptCore/DerivedSources-input.xcfilelist
@@ -101,20 +101,25 @@ $(PROJECT_DIR)/inspector/protocol/CPUProfiler.json
 $(PROJECT_DIR)/inspector/protocol/CSS.json
 $(PROJECT_DIR)/inspector/protocol/Canvas.json
 $(PROJECT_DIR)/inspector/protocol/Console.json
+$(PROJECT_DIR)/inspector/protocol/Dialog.json
 $(PROJECT_DIR)/inspector/protocol/DOM.json
 $(PROJECT_DIR)/inspector/protocol/DOMDebugger.json
 $(PROJECT_DIR)/inspector/protocol/DOMStorage.json
 $(PROJECT_DIR)/inspector/protocol/Debugger.json
+$(PROJECT_DIR)/inspector/protocol/Emulation.json
 $(PROJECT_DIR)/inspector/protocol/GenericTypes.json
 $(PROJECT_DIR)/inspector/protocol/Heap.json
 $(PROJECT_DIR)/inspector/protocol/IndexedDB.json
+$(PROJECT_DIR)/inspector/protocol/Input.json
 $(PROJECT_DIR)/inspector/protocol/Inspector.json
 $(PROJECT_DIR)/inspector/protocol/LayerTree.json
 $(PROJECT_DIR)/inspector/protocol/Memory.json
 $(PROJECT_DIR)/inspector/protocol/Network.json
 $(PROJECT_DIR)/inspector/protocol/Page.json
+$(PROJECT_DIR)/inspector/protocol/Playwright.json
 $(PROJECT_DIR)/inspector/protocol/Recording.json
 $(PROJECT_DIR)/inspector/protocol/Runtime.json
+$(PROJECT_DIR)/inspector/protocol/Screencast.json
 $(PROJECT_DIR)/inspector/protocol/ScriptProfiler.json
 $(PROJECT_DIR)/inspector/protocol/Security.json
 $(PROJECT_DIR)/inspector/protocol/ServiceWorker.json
diff --git a/Source/JavaScriptCore/DerivedSources.make b/Source/JavaScriptCore/DerivedSources.make
index 7eb4f1c1e0cd3abdf61203d33cd2f53d77d4264d..01adf210b42055612dc02aba0ed52e6f6ed1d10f 100644
--- a/Source/JavaScriptCore/DerivedSources.make
+++ b/Source/JavaScriptCore/DerivedSources.make
@@ -298,21 +298,26 @@ INSPECTOR_DOMAINS := \
     $(JavaScriptCore)/inspector/protocol/CSS.json \
     $(JavaScriptCore)/inspector/protocol/Canvas.json \
     $(JavaScriptCore)/inspector/protocol/Console.json \
+    $(JavaScriptCore)/inspector/protocol/Dialog.json \
     $(JavaScriptCore)/inspector/protocol/DOM.json \
     $(JavaScriptCore)/inspector/protocol/DOMDebugger.json \
     $(JavaScriptCore)/inspector/protocol/DOMStorage.json \
     $(JavaScriptCore)/inspector/protocol/Debugger.json \
+    $(JavaScriptCore)/inspector/protocol/Emulation.json \
     $(JavaScriptCore)/inspector/protocol/GenericTypes.json \
     $(JavaScriptCore)/inspector/protocol/Heap.json \
     $(JavaScriptCore)/inspector/protocol/IndexedDB.json \
+    $(JavaScriptCore)/inspector/protocol/Input.json \
     $(JavaScriptCore)/inspector/protocol/Inspector.json \
     $(JavaScriptCore)/inspector/protocol/LayerTree.json \
     $(JavaScriptCore)/inspector/protocol/Memory.json \
     $(JavaScriptCore)/inspector/protocol/Network.json \
     $(JavaScriptCore)/inspector/protocol/Page.json \
+    $(JavaScriptCore)/inspector/protocol/Playwright.json \
     $(JavaScriptCore)/inspector/protocol/Recording.json \
     $(JavaScriptCore)/inspector/protocol/Runtime.json \
     $(JavaScriptCore)/inspector/protocol/ScriptProfiler.json \
+    $(JavaScriptCore)/inspector/protocol/Screencast.json \
     $(JavaScriptCore)/inspector/protocol/Security.json \
     $(JavaScriptCore)/inspector/protocol/ServiceWorker.json \
     $(JavaScriptCore)/inspector/protocol/Target.json \
diff --git a/Source/JavaScriptCore/inspector/IdentifiersFactory.cpp b/Source/JavaScriptCore/inspector/IdentifiersFactory.cpp
index 9bc5d1fd8e2a7e576be046b3c6ae1266696cf552..610f810db1dd6865c500c0796386a8284f4178e9 100644
--- a/Source/JavaScriptCore/inspector/IdentifiersFactory.cpp
+++ b/Source/JavaScriptCore/inspector/IdentifiersFactory.cpp
@@ -32,14 +32,21 @@
 namespace Inspector {
 
 namespace {
+static uint64_t s_processID = 0;
 static unsigned long s_lastUsedIdentifier = 0;
 }
 
 static String addPrefixToIdentifier(unsigned long identifier)
 {
-    return makeString("0."_s, identifier);
+    return makeString(s_processID, '.', identifier);
 }
 
+void IdentifiersFactory::initializeWithProcessID(uint64_t processID) {
+    ASSERT(!s_processID);
+    s_processID = processID;
+}
+
+
 String IdentifiersFactory::createIdentifier()
 {
     return addPrefixToIdentifier(++s_lastUsedIdentifier);
diff --git a/Source/JavaScriptCore/inspector/IdentifiersFactory.h b/Source/JavaScriptCore/inspector/IdentifiersFactory.h
index e145f18eff043f6d718f38d14159415327a0b43b..747c06864110ef4488d8e4b0f6fd74a1d9badadd 100644
--- a/Source/JavaScriptCore/inspector/IdentifiersFactory.h
+++ b/Source/JavaScriptCore/inspector/IdentifiersFactory.h
@@ -32,6 +32,7 @@ namespace Inspector {
 
 class IdentifiersFactory {
 public:
+    JS_EXPORT_PRIVATE static void initializeWithProcessID(uint64_t);
     JS_EXPORT_PRIVATE static String createIdentifier();
     JS_EXPORT_PRIVATE static String requestId(unsigned long identifier);
 };
diff --git a/Source/JavaScriptCore/inspector/InjectedScriptBase.cpp b/Source/JavaScriptCore/inspector/InjectedScriptBase.cpp
index 4d9152423abf35dfbdf338435b567a822b2f6904..4e6b551494e1d124655c8cc54f121ac4843c3298 100644
--- a/Source/JavaScriptCore/inspector/InjectedScriptBase.cpp
+++ b/Source/JavaScriptCore/inspector/InjectedScriptBase.cpp
@@ -85,7 +85,10 @@ static RefPtr<JSON::Value> jsToInspectorValue(JSC::JSGlobalObject* globalObject,
         JSC::PropertyNameArrayBuilder propertyNames(vm, JSC::PropertyNameMode::Strings, JSC::PrivateSymbolMode::Exclude);
         object.methodTable()->getOwnPropertyNames(&object, globalObject, propertyNames, JSC::DontEnumPropertiesMode::Exclude);
         for (auto& name : propertyNames) {
-            auto inspectorValue = jsToInspectorValue(globalObject, object.get(globalObject, name), maxDepth);
+            JSC::JSValue childValue = object.get(globalObject, name);
+            if (childValue.isUndefined())
+                continue;
+            auto inspectorValue = jsToInspectorValue(globalObject, childValue, maxDepth);
             if (!inspectorValue)
                 return nullptr;
             inspectorObject->setValue(name.string(), inspectorValue.releaseNonNull());
diff --git a/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.cpp b/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.cpp
index 449ff9c805107a41f783eaf72b9901d0df6a3e72..a56a086892caa03e171616bd90db8cbf94905b0d 100644
--- a/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.cpp
+++ b/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.cpp
@@ -103,7 +103,7 @@ void BackendDispatcher::registerDispatcherForDomain(const String& domain, Supple
     m_dispatchers.set(domain, dispatcher);
 }
 
-void BackendDispatcher::dispatch(const String& message)
+void BackendDispatcher::dispatch(const String& message, Interceptor&& interceptor)
 {
     Ref<BackendDispatcher> protect(*this);
 
@@ -148,6 +148,9 @@ void BackendDispatcher::dispatch(const String& message)
         requestId = *requestIdInt;
     }
 
+    if (interceptor && interceptor(messageObject) == InterceptionResult::Intercepted)
+        return;
+
     {
         // We could be called re-entrantly from a nested run loop, so restore the previous id.
         SetForScope scopedRequestId(m_currentRequestId, requestId);
diff --git a/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.h b/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.h
index ed0cb419967759a258d3d250fd42d2b86ca32561..0788de297278f875d18dd9da22df53a72f34d52b 100644
--- a/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.h
+++ b/Source/JavaScriptCore/inspector/InspectorBackendDispatcher.h
@@ -97,8 +97,11 @@ public:
         ServerError
     };
 
+    enum class InterceptionResult { Intercepted, Continue };
+    using Interceptor = WTF::Function<InterceptionResult(const RefPtr<JSON::Object>&)>;
+
     JS_EXPORT_PRIVATE void registerDispatcherForDomain(const String& domain, SupplementalBackendDispatcher*);
-    JS_EXPORT_PRIVATE void dispatch(const String& message);
+    JS_EXPORT_PRIVATE void dispatch(const String& message, Interceptor&& interceptor = Interceptor());
 
     // Note that 'unused' is a workaround so the compiler can pick the right sendResponse based on arity.
     // When <http://webkit.org/b/179847> is fixed or this class is renamed for the JSON::Object case,
diff --git a/Source/JavaScriptCore/inspector/InspectorFrontendRouter.cpp b/Source/JavaScriptCore/inspector/InspectorFrontendRouter.cpp
index 13207d2da597e3b96cc9e83d0bee83fa859cdcf0..c4f9f4714578652cb71f106bb0bfdb69440ed238 100644
--- a/Source/JavaScriptCore/inspector/InspectorFrontendRouter.cpp
+++ b/Source/JavaScriptCore/inspector/InspectorFrontendRouter.cpp
@@ -52,7 +52,7 @@ void FrontendRouter::connectFrontend(FrontendChannel& connection)
 void FrontendRouter::disconnectFrontend(FrontendChannel& connection)
 {
     if (!m_connections.contains(&connection)) {
-        ASSERT_NOT_REACHED();
+        ASSERT(m_connections.isEmpty());
         return;
     }
 
diff --git a/Source/JavaScriptCore/inspector/InspectorTarget.cpp b/Source/JavaScriptCore/inspector/InspectorTarget.cpp
index b68a7eb5e8d26ea7631b451f629734c886896684..92dba414b7e9c3587ae40c4cb7bb6e4f10895a70 100644
--- a/Source/JavaScriptCore/inspector/InspectorTarget.cpp
+++ b/Source/JavaScriptCore/inspector/InspectorTarget.cpp
@@ -48,6 +48,8 @@ void InspectorTarget::resume()
     ASSERT(m_isPaused);
     m_isPaused = false;
 
+    willResume();
+
     if (m_resumeCallback) {
         m_resumeCallback();
         m_resumeCallback = nullptr;
@@ -56,7 +58,6 @@ void InspectorTarget::resume()
 
 void InspectorTarget::setResumeCallback(WTF::Function<void()>&& callback)
 {
-    ASSERT(!m_resumeCallback);
     m_resumeCallback = WTF::move(callback);
 }
 
diff --git a/Source/JavaScriptCore/inspector/InspectorTarget.h b/Source/JavaScriptCore/inspector/InspectorTarget.h
index 421d62c0071a43b7fb111a4e2b120e28c5ba96af..de764f8519c3df6a9325d3eb87e7fe907c5b5b6a 100644
--- a/Source/JavaScriptCore/inspector/InspectorTarget.h
+++ b/Source/JavaScriptCore/inspector/InspectorTarget.h
@@ -61,8 +61,12 @@ public:
     virtual void connect(FrontendChannel::ConnectionType) = 0;
     virtual void disconnect() = 0;
     virtual void sendMessageToTargetBackend(const String&) = 0;
+    virtual void activate(String& error) { error = "Target cannot be activated"_s; }
+    virtual void close(String& error, bool /* runBeforeUnload */) { error = "Target cannot be closed"_s; }
 
 private:
+    virtual void willResume() { }
+
     WTF::Function<void()> m_resumeCallback;
     bool m_isPaused { false };
 };
diff --git a/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.cpp b/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.cpp
index ddd58da62382291979c72d62700c61c137f5b965..ab114ba249ec6901c78da7703b5e8140d7cebcca 100644
--- a/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.cpp
+++ b/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.cpp
@@ -232,6 +232,14 @@ void JSGlobalObjectConsoleClient::screenshot(JSGlobalObject*, Ref<ScriptArgument
     warnUnimplemented("console.screenshot"_s);
 }
 
+void JSGlobalObjectConsoleClient::bindingCalled(JSGlobalObject*, const String&, const String&)
+{
+    if (!m_consoleAgent->developerExtrasEnabled())
+        return;
+
+    warnUnimplemented("console.bindingCalled"_s);
+}
+
 void JSGlobalObjectConsoleClient::warnUnimplemented(const String& method)
 {
     auto message = makeString(method, " is currently ignored in JavaScript context inspection."_s);
diff --git a/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.h b/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.h
index ed7dbb3ee1de5183f1c1868310b332f52d2e8cd6..90dd8331ba5cf87a32407a01cfe9d218b4822f1c 100644
--- a/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.h
+++ b/Source/JavaScriptCore/inspector/JSGlobalObjectConsoleClient.h
@@ -68,6 +68,7 @@ private:
     void record(JSC::JSGlobalObject*, Ref<ScriptArguments>&&) final;
     void recordEnd(JSC::JSGlobalObject*, Ref<ScriptArguments>&&) final;
     void screenshot(JSC::JSGlobalObject*, Ref<ScriptArguments>&&) final;
+    void bindingCalled(JSC::JSGlobalObject*, const String&, const String&) final;
 
     void warnUnimplemented(const String& method);
     void internalAddMessage(MessageType, MessageLevel, JSC::JSGlobalObject*, Ref<ScriptArguments>&&);
diff --git a/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.cpp b/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.cpp
index bd5258cf60b70750c52277007f657fbfaeaeec68..8ad812f65d8f2f6112d2456789a82520e215633b 100644
--- a/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.cpp
+++ b/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.cpp
@@ -219,6 +219,11 @@ void InspectorRuntimeAgent::callFunctionOn(InjectedScript& injectedScript, const
         unmuteConsole();
 }
 
+Protocol::ErrorStringOr<void> InspectorRuntimeAgent::addBinding(const String&)
+{
+    return makeUnexpected("Not implemented in this type of agent."_s);
+}
+
 Protocol::ErrorStringOr<Ref<Protocol::Runtime::ObjectPreview>> InspectorRuntimeAgent::getPreview(const Protocol::Runtime::RemoteObjectId& objectId)
 {
     Protocol::ErrorString errorString;
diff --git a/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.h b/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.h
index f7ed41f0b3aaa9bb0eb388c4edbef2645e9b1dd4..511ff1799f7480c85fb46beda36fb52f3d489099 100644
--- a/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.h
+++ b/Source/JavaScriptCore/inspector/agents/InspectorRuntimeAgent.h
@@ -65,6 +65,7 @@ public:
     Protocol::ErrorStringOr<std::tuple<Ref<Protocol::Runtime::RemoteObject>, std::optional<bool> /* wasThrown */, std::optional<int> /* savedResultIndex */>> evaluate(const String& expression, const String& objectGroup, std::optional<bool>&& includeCommandLineAPI, std::optional<bool>&& doNotPauseOnExceptionsAndMuteConsole, std::optional<Protocol::Runtime::ExecutionContextId>&&, std::optional<bool>&& returnByValue, std::optional<bool>&& generatePreview, std::optional<bool>&& saveResult, std::optional<bool>&& emulateUserGesture) override;
     void awaitPromise(const Protocol::Runtime::RemoteObjectId&, std::optional<bool>&& returnByValue, std::optional<bool>&& generatePreview, std::optional<bool>&& saveResult, Ref<AwaitPromiseCallback>&&) final;
     void callFunctionOn(const Protocol::Runtime::RemoteObjectId&, const String& functionDeclaration, RefPtr<JSON::Array>&& arguments, std::optional<bool>&& doNotPauseOnExceptionsAndMuteConsole, std::optional<bool>&& returnByValue, std::optional<bool>&& generatePreview, std::optional<bool>&& emulateUserGesture, std::optional<bool>&& awaitPromise, Ref<CallFunctionOnCallback>&&) override;
+    Protocol::ErrorStringOr<void> addBinding(const String& name) override;
     Protocol::ErrorStringOr<void> releaseObject(const Protocol::Runtime::RemoteObjectId&) final;
     Protocol::ErrorStringOr<Ref<Protocol::Runtime::ObjectPreview>> getPreview(const Protocol::Runtime::RemoteObjectId&) final;
     Protocol::ErrorStringOr<std::tuple<Ref<JSON::ArrayOf<Protocol::Runtime::PropertyDescriptor>>, RefPtr<JSON::ArrayOf<Protocol::Runtime::InternalPropertyDescriptor>>>> getProperties(const Protocol::Runtime::RemoteObjectId&, std::optional<bool>&& ownProperties, std::optional<int>&& fetchStart, std::optional<int>&& fetchCount, std::optional<bool>&& generatePreview) final;
diff --git a/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.cpp b/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.cpp
index 38d8aa7a256deab40470631c8f2231d9d34613e1..6c7f776c0b7f2ab7a1a3870ebaa42a3da5ad794c 100644
--- a/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.cpp
+++ b/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.cpp
@@ -90,6 +90,34 @@ Protocol::ErrorStringOr<void> InspectorTargetAgent::sendMessageToTarget(const St
     return { };
 }
 
+Protocol::ErrorStringOr<void> InspectorTargetAgent::activate(const String& targetId)
+{
+    InspectorTarget* target = m_targets.get(targetId);
+    if (!target)
+        return makeUnexpected("Missing target for given targetId"_s);
+
+    String errorString;
+    target->activate(errorString);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    return { };
+}
+
+Protocol::ErrorStringOr<void> InspectorTargetAgent::close(const String& targetId,  std::optional<bool>&& runBeforeUnload)
+{
+    InspectorTarget* target = m_targets.get(targetId);
+    if (!target)
+        return makeUnexpected("Missing target for given targetId"_s);
+
+    String errorString;
+    target->close(errorString, runBeforeUnload && *runBeforeUnload);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    return { };
+}
+
 void InspectorTargetAgent::sendMessageFromTargetToFrontend(const String& targetId, const String& message)
 {
     m_frontendDispatcher->dispatchMessageFromTarget(targetId, message);
@@ -147,7 +175,17 @@ void InspectorTargetAgent::targetDestroyed(InspectorTarget& target)
     if (!m_isConnected)
         return;
 
-    m_frontendDispatcher->targetDestroyed(target.identifier());
+    m_frontendDispatcher->targetDestroyed(target.identifier(), false);
+}
+
+void InspectorTargetAgent::targetCrashed(InspectorTarget& target)
+{
+    m_targets.remove(target.identifier());
+
+    if (!m_isConnected)
+        return;
+
+    m_frontendDispatcher->targetDestroyed(target.identifier(), true);
 }
 
 void InspectorTargetAgent::didCommitProvisionalTarget(const String& oldTargetID, const String& committedTargetID)
diff --git a/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.h b/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.h
index 0b7d732f036fce96b01bd06f4c47f5d471a0ab38..a9efea4bec66aa68966c99d9e77f8a36f7f7205a 100644
--- a/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.h
+++ b/Source/JavaScriptCore/inspector/agents/InspectorTargetAgent.h
@@ -53,8 +53,11 @@ public:
     Protocol::ErrorStringOr<void> setPauseOnStart(bool) final;
     Protocol::ErrorStringOr<void> resume(const String& targetId) final;
     Protocol::ErrorStringOr<void> sendMessageToTarget(const String& targetId, const String& message) final;
+    Protocol::ErrorStringOr<void> activate(const String& targetId) override;
+    Protocol::ErrorStringOr<void> close(const String& targetId, std::optional<bool>&& runBeforeUnload) override;
 
     // Target lifecycle.
+    void targetCrashed(InspectorTarget&);
     void targetCreated(InspectorTarget&);
     void targetDestroyed(InspectorTarget&);
     void didCommitProvisionalTarget(const String& oldTargetID, const String& committedTargetID);
@@ -62,6 +65,9 @@ public:
     // Target messages.
     void sendMessageFromTargetToFrontend(const String& targetId, const String& message);
 
+    bool shouldPauseOnStart() const { return m_shouldPauseOnStart; }
+    bool isConnected() { return m_isConnected; }
+
 private:
     // FrontendChannel
     FrontendChannel::ConnectionType connectionType() const;
diff --git a/Source/JavaScriptCore/inspector/protocol/DOM.json b/Source/JavaScriptCore/inspector/protocol/DOM.json
index 0b41f31605a2407fd068e28eaec60dbeabefd4d8..80fc7f1351949447c1f988641a26bcf695d589f2 100644
--- a/Source/JavaScriptCore/inspector/protocol/DOM.json
+++ b/Source/JavaScriptCore/inspector/protocol/DOM.json
@@ -80,6 +80,16 @@
                 { "name": "value", "type": "string", "description": "The value that is resolved to with this data binding relationship." }
             ]
         },
+        {
+          "id": "Rect",
+          "type": "object",
+          "properties": [
+            { "name": "x", "type": "integer", "description": "X coordinate" },
+            { "name": "y", "type": "integer", "description": "Y coordinate" },
+            { "name": "width", "type": "integer", "description": "Rectangle width" },
+            { "name": "height", "type": "integer", "description": "Rectangle height" }
+      ]
+        },
         {
             "id": "EventListener",
             "type": "object",
@@ -740,7 +750,10 @@
             "description": "Resolves JavaScript node object for given node id.",
             "targetTypes": ["page"],
             "parameters": [
-                { "name": "nodeId", "$ref": "NodeId", "description": "Id of the node to resolve." },
+                { "name": "nodeId", "$ref": "NodeId", "optional": true, "description": "Id of the node to resolve." },
+                { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "optional": true, "description": "Source element handle." },
+                { "name": "frameId", "$ref": "Network.FrameId", "optional": true, "description": "Id of the frame to resolve the owner element." },
+                { "name": "executionContextId", "$ref": "Runtime.ExecutionContextId", "optional": true, "description": "Specifies in which execution context to adopt to." },
                 { "name": "objectGroup", "type": "string", "optional": true, "description": "Symbolic group name that can be used to release multiple objects." }
             ],
             "returns": [
@@ -817,6 +830,46 @@
             "returns": [
                 { "name": "mediaStats", "$ref": "MediaStats", "description": "An interleaved array of node attribute names and values." }
             ]
+        },
+        {
+            "name": "describeNode",
+            "description": "Returns node description.",
+            "parameters": [
+                { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "description": "JavaScript object id of the node wrapper." }
+            ],
+            "returns": [
+                { "name": "contentFrameId", "$ref": "Network.FrameId", "optional": true, "description": "Frame ID for frame owner elements." },
+                { "name": "ownerFrameId", "$ref": "Network.FrameId", "optional": true, "description": "ID of the owning frame element." }
+            ]
+        },
+        {
+          "name": "scrollIntoViewIfNeeded",
+          "description": "Scrolls the given rect into view if not already in the viewport.",
+          "parameters": [
+              { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "description": "JavaScript object id of the node wrapper." },
+              { "name": "rect", "$ref": "Rect", "optional": true, "description": "Rect relative to the node's border box, in CSS pixels." }
+          ]
+        },
+        {
+            "name": "getContentQuads",
+            "description": "Returns quads that describe node position on the page. This method\nmight return multiple quads for inline nodes.",
+            "parameters": [
+                { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "description": "JavaScript object id of the node wrapper." }
+            ],
+            "returns": [
+                {
+                    "name": "quads", "type": "array", "items": { "$ref": "Quad" }, "description": "Quads that describe node layout relative to viewport."
+                }
+            ]
+        },
+        {
+            "name": "setInputFiles",
+            "description": "Sets input files for given <input type=file>",
+            "parameters": [
+                { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "description": "Input element handle." },
+                { "name": "paths", "type": "array", "items": { "type": "string" }, "description": "File paths to set" }
+            ],
+            "async": true
         }
     ],
     "events": [
diff --git a/Source/JavaScriptCore/inspector/protocol/Dialog.json b/Source/JavaScriptCore/inspector/protocol/Dialog.json
new file mode 100644
index 0000000000000000000000000000000000000000..79edea03fed4e9be5da96e1275e182a479cb7a0a
--- /dev/null
+++ b/Source/JavaScriptCore/inspector/protocol/Dialog.json
@@ -0,0 +1,36 @@
+{
+    "domain": "Dialog",
+    "description": "Actions and events related to alert boxes.",
+    "availability": ["web"],
+    "types": [
+    ],
+    "commands": [
+        {
+            "name": "enable",
+            "description": "Enables dialog domain notifications."
+        },
+        {
+            "name": "disable",
+            "description": "Disables dialog domain notifications."
+        },
+        {
+            "name": "handleJavaScriptDialog",
+            "description": "Accepts or dismisses a JavaScript initiated dialog (alert, confirm, prompt, or onbeforeunload).",
+            "parameters": [
+                { "name": "accept", "type": "boolean", "description": "Whether to accept or dismiss the dialog."},
+                { "name": "promptText", "optional": true, "type": "string", "description": "The text to enter into the dialog prompt before accepting. Used only if this is a prompt dialog."}
+            ]
+        }
+    ],
+    "events": [
+        {
+            "name": "javascriptDialogOpening",
+            "description": "Fired when a JavaScript initiated dialog (alert, confirm, prompt, or onbeforeunload) is about to open.",
+            "parameters": [
+                { "name": "type", "type": "string", "description": "Dialog type."},
+                { "name": "message", "type": "string", "description": "Message that will be displayed by the dialog."},
+                { "name": "defaultPrompt", "optional": true, "type": "string", "description": "Default dialog prompt."}
+            ]
+        }
+    ]
+}
diff --git a/Source/JavaScriptCore/inspector/protocol/Emulation.json b/Source/JavaScriptCore/inspector/protocol/Emulation.json
new file mode 100644
index 0000000000000000000000000000000000000000..8377901cb3ad75c29532a1f0f547efb53558a327
--- /dev/null
+++ b/Source/JavaScriptCore/inspector/protocol/Emulation.json
@@ -0,0 +1,59 @@
+{
+    "domain": "Emulation",
+    "availability": ["web"],
+    "commands": [
+        {
+            "name": "setDeviceMetricsOverride",
+            "description": "Overrides device metrics with provided values.",
+            "async": true,
+            "parameters": [
+                { "name": "width", "type": "integer" },
+                { "name": "height", "type": "integer" },
+                { "name": "fixedLayout", "type": "boolean" },
+                { "name": "deviceScaleFactor", "type": "number", "optional": true }
+            ]
+        },
+        {
+            "name": "setJavaScriptEnabled",
+            "description": "Allows to disable script execution for the page.",
+            "parameters": [
+                { "name": "enabled", "type": "boolean" }
+            ]
+        },
+        {
+            "name": "setAuthCredentials",
+            "description": "Credentials to use during HTTP authentication.",
+            "parameters": [
+                { "name": "username", "type": "string", "optional": true },
+                { "name": "password", "type": "string", "optional": true },
+                { "name": "origin", "type": "string", "optional": true }
+            ]
+        },
+        {
+            "name": "setActiveAndFocused",
+            "description": "Makes page focused for test.",
+            "parameters": [
+                { "name": "active", "type": "boolean", "optional": true }
+            ]
+        },
+        {
+            "name": "grantPermissions",
+            "parameters": [
+                { "name": "origin", "type": "string" },
+                { "name": "permissions", "type": "array", "items": { "type": "string" } }
+            ],
+            "description": "Overrides the permissions."
+        },
+        {
+            "name": "resetPermissions",
+            "description": "Clears permission overrides."
+        },
+        {
+            "name": "setOrientationOverride",
+            "description": "Overrides window.orientation with provided value.",
+            "parameters": [
+                { "name": "angle", "type": "integer", "optional": true }
+            ]
+        }
+    ]
+}
diff --git a/Source/JavaScriptCore/inspector/protocol/Input.json b/Source/JavaScriptCore/inspector/protocol/Input.json
new file mode 100644
index 0000000000000000000000000000000000000000..1c43b476603325fa412bcfded9163e7a00aebbfa
--- /dev/null
+++ b/Source/JavaScriptCore/inspector/protocol/Input.json
@@ -0,0 +1,264 @@
+{
+    "domain": "Input",
+    "availability": ["web"],
+    "types": [
+        {
+            "id": "TimeSinceEpoch",
+            "description": "UTC time in seconds, counted from January 1, 1970.",
+            "type": "number"
+        },
+        {
+            "id": "TouchPoint",
+            "type": "object",
+            "description": "Touch point.",
+            "properties": [
+                { "name": "x", "type": "integer", "description": "X coordinate of the event relative to the main frame's viewport in CSS pixels." },
+                { "name": "y", "type": "integer", "description": "Y coordinate of the event relative to the main frame's viewport in CSS pixels." },
+                { "name": "id", "type": "integer", "description": "Identifier used to track touch sources between events, must be unique within an event." }
+            ]
+        }
+    ],
+    "commands": [
+        {
+            "name": "dispatchKeyEvent",
+            "description": "Dispatches a key event to the page.",
+            "async": true,
+            "parameters": [
+                {
+                    "name": "type",
+                    "description": "Type of the key event.",
+                    "type": "string",
+                    "enum": [
+                        "keyDown",
+                        "keyUp"
+                    ]
+                },
+                {
+                    "name": "modifiers",
+                    "description": "Bit field representing pressed modifier keys. (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "text",
+                    "description": "Text as generated by processing a virtual key code with a keyboard layout. Not needed for\nfor `keyUp` and `rawKeyDown` events (default: \"\")",
+                    "optional": true,
+                    "type": "string"
+                },
+                {
+                    "name": "unmodifiedText",
+                    "description": "Text that would have been generated by the keyboard if no modifiers were pressed (except for\nshift). Useful for shortcut (accelerator) key handling (default: \"\").",
+                    "optional": true,
+                    "type": "string"
+                },
+                {
+                    "name": "code",
+                    "description": "Unique DOM defined string value for each physical key (e.g., 'KeyA') (default: \"\").",
+                    "optional": true,
+                    "type": "string"
+                },
+                {
+                    "name": "key",
+                    "description": "Unique DOM defined string value describing the meaning of the key in the context of active\nmodifiers, keyboard layout, etc (e.g., 'AltGr') (default: \"\").",
+                    "optional": true,
+                    "type": "string"
+                },
+                {
+                    "name": "windowsVirtualKeyCode",
+                    "description": "Windows virtual key code (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "nativeVirtualKeyCode",
+                    "description": "Native virtual key code (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "autoRepeat",
+                    "description": "Whether the event was generated from auto repeat (default: false).",
+                    "optional": true,
+                    "type": "boolean"
+                },
+                {
+                    "name": "isKeypad",
+                    "description": "Whether the event was generated from the keypad (default: false).",
+                    "optional": true,
+                    "type": "boolean"
+                },
+                {
+                    "name": "isSystemKey",
+                    "description": "Whether the event was a system key event (default: false).",
+                    "optional": true,
+                    "type": "boolean"
+                },
+                {
+                    "name": "macCommands",
+                    "description": "Mac editing commands associated with this key",
+                    "type": "array",
+                    "optional": true,
+                    "items": {
+                      "type": "string"
+                    }
+                }
+            ]
+        },
+        {
+            "name": "dispatchMouseEvent",
+            "description": "Dispatches a mouse event to the page.",
+            "async": true,
+            "parameters": [
+                {
+                    "name": "type",
+                    "description": "Type of the mouse event.",
+                    "type": "string",
+                    "enum": [ "move", "down", "up", "wheel"]
+                },
+                {
+                    "name": "x",
+                    "description": "X coordinate of the event relative to the main frame's viewport in CSS pixels.",
+                    "type": "integer"
+                },
+                {
+                    "name": "y",
+                    "description": "Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to\nthe top of the viewport and Y increases as it proceeds towards the bottom of the viewport.",
+                    "type": "integer"
+                },
+                {
+                    "name": "modifiers",
+                    "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8\n(default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "button",
+                    "description": "Mouse button (default: \"none\").",
+                    "optional": true,
+                    "type": "string",
+                    "enum": [
+                        "none",
+                        "left",
+                        "middle",
+                        "right",
+                        "back",
+                        "forward"
+                    ]
+                },
+                {
+                    "name": "buttons",
+                    "description": "A number indicating which buttons are pressed on the mouse when a mouse event is triggered.\nLeft=1, Right=2, Middle=4, Back=8, Forward=16, None=0.",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "clickCount",
+                    "description": "Number of times the mouse button was clicked (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "deltaX",
+                    "description": "X delta in CSS pixels for mouse wheel event (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "deltaY",
+                    "description": "Y delta in CSS pixels for mouse wheel event (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                }
+            ]
+        },
+        {
+            "name": "dispatchWheelEvent",
+            "description": "Dispatches a wheel event to the page.",
+            "async": true,
+            "parameters": [
+                {
+                    "name": "x",
+                    "description": "X coordinate of the event relative to the main frame's viewport in CSS pixels.",
+                    "type": "integer"
+                },
+                {
+                    "name": "y",
+                    "description": "Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to\nthe top of the viewport and Y increases as it proceeds towards the bottom of the viewport.",
+                    "type": "integer"
+                },
+                {
+                    "name": "modifiers",
+                    "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8\n(default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "deltaX",
+                    "description": "X delta in CSS pixels for mouse wheel event (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "deltaY",
+                    "description": "Y delta in CSS pixels for mouse wheel event (default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                }
+            ]
+        },
+        {
+            "name": "dispatchTapEvent",
+            "description": "Dispatches a tap event to the page.",
+            "async": true,
+            "parameters": [
+                {
+                    "name": "x",
+                    "description": "X coordinate of the event relative to the main frame's viewport in CSS pixels.",
+                    "type": "integer"
+                },
+                {
+                    "name": "y",
+                    "description": "Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to\nthe top of the viewport and Y increases as it proceeds towards the bottom of the viewport.",
+                    "type": "integer"
+                },
+                {
+                    "name": "modifiers",
+                    "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8\n(default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                }
+            ]
+        },
+        {
+            "name": "dispatchTouchEvent",
+            "description": "Dispatches a touch event to the page.",
+            "async": true,
+            "parameters": [
+                {
+                    "name": "type",
+                    "description": "Type of the touch event.",
+                    "type": "string",
+                    "enum": [
+                        "touchStart",
+                        "touchMove",
+                        "touchEnd",
+                        "touchCancel"
+                    ]
+                },
+                {
+                    "name": "modifiers",
+                    "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8\n(default: 0).",
+                    "optional": true,
+                    "type": "integer"
+                },
+                {
+                    "name": "touchPoints",
+                    "description": "List of touch points",
+                    "type": "array",
+                    "optional": true,
+                    "items": { "$ref": "TouchPoint" }
+                }
+            ]
+        }
+    ]
+}
diff --git a/Source/JavaScriptCore/inspector/protocol/Network.json b/Source/JavaScriptCore/inspector/protocol/Network.json
index 29a3ef3294dcdf9e9559b665e9f1bb9a5727cf4b..b6b90f356dd6b7de7752ab4296069c8f07b4de38 100644
--- a/Source/JavaScriptCore/inspector/protocol/Network.json
+++ b/Source/JavaScriptCore/inspector/protocol/Network.json
@@ -360,6 +360,13 @@
             "parameters": [
                 { "name": "bytesPerSecondLimit", "type": "integer", "optional": true, "description": "Limits the bytes per second of requests if positive. Removes any limits if zero or not provided." }
             ]
+        },
+        {
+            "name": "setEmulateOfflineState",
+            "description": "Emulate offline state overriding the actual state.",
+            "parameters": [
+                { "name": "offline", "type": "boolean", "description": "True to emulate offline." }
+            ]
         }
     ],
     "events": [
diff --git a/Source/JavaScriptCore/inspector/protocol/Page.json b/Source/JavaScriptCore/inspector/protocol/Page.json
index 374b26c3ee9acf39aeb23fb60821b39d0afd971c..8843241e3e669c2d7537adb11e83325f216febba 100644
--- a/Source/JavaScriptCore/inspector/protocol/Page.json
+++ b/Source/JavaScriptCore/inspector/protocol/Page.json
@@ -20,7 +20,15 @@
                 "ScriptEnabled",
                 "ShowDebugBorders",
                 "ShowRepaintCounter",
-                "WebSecurityEnabled"
+                "WebSecurityEnabled",
+                "DeviceOrientationEventEnabled",
+                "SpeechRecognitionEnabled",
+                "PointerLockEnabled",
+                "NotificationsEnabled",
+                "FullScreenEnabled",
+                "InputTypeMonthEnabled",
+                "InputTypeWeekEnabled",
+                "FixedBackgroundsPaintRelativeToDocument"
             ]
         },
         {
@@ -62,6 +70,12 @@
             "enum": ["None", "Lax", "Strict"],
             "description": "Same-Site policy of a cookie."
         },
+        {
+            "id": "ForcedColors",
+            "type": "string",
+            "enum": ["Active", "None"],
+            "description": "Page forced-colors media query override."
+        },
         {
             "id": "Frame",
             "type": "object",
@@ -126,6 +140,16 @@
                 { "name": "sameSite", "$ref": "CookieSameSitePolicy", "description": "Cookie Same-Site policy." },
                 { "name": "partitionKey", "type": "string", "optional": true, "description": "Cookie partition key. If null and partitioned property is true, then key must be computed." }
             ]
+        },
+        {
+            "id": "Insets",
+            "type": "object",
+            "properties": [
+                { "name": "top", "type": "number" },
+                { "name": "right", "type": "number" },
+                { "name": "bottom", "type": "number" },
+                { "name": "left", "type": "number" }
+            ]
         }
     ],
     "commands": [
@@ -145,6 +169,14 @@
                 { "name": "revalidateAllResources", "type": "boolean", "optional": true, "description": "If true, all cached subresources will be revalidated when the main resource loads. Otherwise, only expired cached subresources will be revalidated (the default behavior for most WebKit clients)." }
             ]
         },
+        {
+            "name": "goBack",
+            "description": "Goes back in the history."
+        },
+        {
+            "name": "goForward",
+            "description": "Goes forward in the history."
+        },
         {
             "name": "overrideUserAgent",
             "description": "Override's the user agent of the inspected page",
@@ -153,6 +185,14 @@
                 { "name": "value", "type": "string", "optional": true, "description": "Value to override the user agent with. If this value is not provided, the override is removed. Overrides are removed when Web Inspector closes/disconnects." }
             ]
         },
+        {
+            "name": "overridePlatform",
+            "description": "Override's the navigator.platform of the inspected page",
+            "targetTypes": ["page"],
+            "parameters": [
+                { "name": "value", "type": "string", "optional": true, "description": "Value to override the platform with. If this value is not provided, the override is removed. Overrides are removed when Web Inspector closes/disconnects." }
+            ]
+        },
         {
             "name": "overrideSetting",
             "description": "Allows the frontend to override the inspected page's settings.",
@@ -277,6 +317,28 @@
                 { "name": "media", "type": "string", "description": "Media type to emulate. Empty string disables the override." }
             ]
         },
+        {
+            "name": "setForcedColors",
+            "description": "Forces the forced-colors media query for the page.",
+            "targetTypes": ["page"],
+            "parameters": [
+                { "name": "forcedColors", "$ref": "ForcedColors", "optional": true }
+            ]
+        },
+        {
+            "name": "setTimeZone",
+            "description": "Enables time zone emulation.",
+            "parameters": [
+                { "name": "timeZone", "type": "string", "optional": true }
+            ]
+        },
+        {
+            "name": "setTouchEmulationEnabled",
+            "description": "Enables touch events on platforms that lack them.",
+            "parameters": [
+                {"name": "enabled", "type": "boolean", "description": "Whether touch should be enabled."}
+            ]
+        },
         {
             "name": "snapshotNode",
             "description": "Capture a snapshot of the specified node that does not include unrelated layers.",
@@ -297,7 +359,8 @@
                 { "name": "y", "type": "integer", "description": "Y coordinate" },
                 { "name": "width", "type": "integer", "description": "Rectangle width" },
                 { "name": "height", "type": "integer", "description": "Rectangle height" },
-                { "name": "coordinateSystem", "$ref": "CoordinateSystem", "description": "Indicates the coordinate system of the supplied rectangle." }
+                { "name": "coordinateSystem", "$ref": "CoordinateSystem", "description": "Indicates the coordinate system of the supplied rectangle." },
+                { "name": "omitDeviceScaleFactor", "type": "boolean", "optional": true, "description": "By default, screenshot is inflated by device scale factor to avoid blurry image. This flag disables it." }
             ],
             "returns": [
                 { "name": "dataURL", "type": "string", "description": "Base64-encoded image data (PNG)." }
@@ -315,12 +378,54 @@
         {
             "name": "setScreenSizeOverride",
             "description": "Overrides screen size exposed to DOM and used in media queries for testing with provided values.",
-            "condition": "!(defined(WTF_PLATFORM_COCOA) && WTF_PLATFORM_COCOA)",
             "targetTypes": ["page"],
             "parameters": [
                 { "name": "width", "type": "integer", "description": "Screen width", "optional": true },
                 { "name": "height", "type": "integer", "description": "Screen height", "optional": true }
             ]
+        },
+        {
+            "name": "insertText",
+            "description": "Insert text into the current selection of the page.",
+            "parameters": [
+                { "name": "text", "type": "string", "description": "Text to insert." }
+            ]
+        },
+        {
+            "name": "setInterceptFileChooserDialog",
+            "description": "Intercepts file chooser dialog",
+            "parameters": [
+                { "name": "enabled", "type": "boolean", "description": "True to enable." }
+            ]
+        },
+        {
+            "name": "setDefaultBackgroundColorOverride",
+            "description": "Sets or clears an override of the default background color of the frame. This override is used if the content does not specify one.",
+            "parameters": [
+                { "name": "color", "$ref": "DOM.RGBAColor", "optional": true, "description": "RGBA of the default background color. If not specified, any existing override will be cleared." }
+            ]
+        },
+        {
+            "name": "createUserWorld",
+            "description": "Creates an user world for every loaded frame.",
+            "parameters": [
+                { "name": "name", "type": "string", "description": "Isolated world name, will be used as an execution context name." }
+            ]
+        },
+        {
+            "name": "setBypassCSP",
+            "description": "Enable page Content Security Policy by-passing.",
+            "parameters": [
+                { "name": "enabled", "type": "boolean", "description": "Whether to bypass page CSP." }
+            ]
+        },
+        {
+            "name": "crash",
+            "description": "Crashes the page process"
+        },
+        {
+            "name": "updateScrollingState",
+            "description": "Ensures that the scroll regions are up to date."
         }
     ],
     "events": [
@@ -328,14 +433,16 @@
             "name": "domContentEventFired",
             "targetTypes": ["page"],
             "parameters": [
-                { "name": "timestamp", "type": "number" }
+                { "name": "timestamp", "type": "number" },
+                { "name": "frameId", "$ref": "Network.FrameId", "description": "Id of the frame that has fired DOMContentLoaded event." }
             ]
         },
         {
             "name": "loadEventFired",
             "targetTypes": ["page"],
             "parameters": [
-                { "name": "timestamp", "type": "number" }
+              { "name": "timestamp", "type": "number" },
+              { "name": "frameId", "$ref": "Network.FrameId", "description": "Id of the frame that has fired load event." }
             ]
         },
         {
@@ -345,6 +452,14 @@
                 { "name": "frame", "$ref": "Frame", "description": "Frame object." }
             ]
         },
+        {
+          "name": "frameAttached",
+          "description": "Fired when frame has been attached to its parent.",
+          "parameters": [
+              { "name": "frameId", "$ref": "Network.FrameId", "description": "Id of the frame that has been detached." },
+              { "name": "parentFrameId", "$ref": "Network.FrameId", "optional": true, "description": "Parent frame id if non-root." }
+          ]
+        },
         {
             "name": "frameDetached",
             "description": "Fired when frame has been detached from its parent.",
@@ -353,6 +468,22 @@
                 { "name": "frameId", "$ref": "Network.FrameId", "description": "Id of the frame that has been detached." }
             ]
         },
+        {
+            "name": "navigatedWithinDocument",
+            "description": "Fired when same-document navigation happens, e.g. due to history API usage or anchor navigation.",
+            "parameters": [
+                {
+                    "name": "frameId",
+                    "description": "Id of the frame.",
+                    "$ref": "Network.FrameId"
+                },
+                {
+                    "name": "url",
+                    "description": "Frame's new url.",
+                    "type": "string"
+                }
+            ]
+        },
         {
             "name": "defaultUserPreferencesDidChange",
             "description": "Fired when the default value of a user preference changes at the system level.",
@@ -360,6 +491,42 @@
             "parameters": [
                 { "name": "preferences", "type": "array", "items": { "$ref": "UserPreference" }, "description": "List of user preferences that can be overriden and their new system (default) values." }
             ]
+        },
+        {
+            "name": "willCheckNavigationPolicy",
+            "description": "Fired when page is about to check policy for newly triggered navigation.",
+            "parameters": [
+                {
+                    "name": "frameId",
+                    "description": "Id of the frame.",
+                    "$ref": "Network.FrameId"
+                }
+            ]
+          },
+          {
+            "name": "didCheckNavigationPolicy",
+            "description": "Fired when page has received navigation policy decision.",
+            "parameters": [
+                {
+                    "name": "frameId",
+                    "description": "Id of the frame.",
+                    "$ref": "Network.FrameId"
+                },
+                {
+                    "name": "cancel",
+                    "description": "True if the navigation will not continue in this frame.",
+                    "type": "boolean",
+                    "optional": true
+                }
+            ]
+          },
+          {
+            "name": "fileChooserOpened",
+            "description": "Fired when the page shows file chooser for it's <input type=file>.",
+            "parameters": [
+                { "name": "frameId", "$ref": "Network.FrameId", "description": "Frame where file chooser is opened." },
+                { "name": "element", "$ref": "Runtime.RemoteObject", "description": "Input element." }
+            ]
         }
     ]
 }
diff --git a/Source/JavaScriptCore/inspector/protocol/Playwright.json b/Source/JavaScriptCore/inspector/protocol/Playwright.json
new file mode 100644
index 0000000000000000000000000000000000000000..ade3e257b614f210ba5dcc024df81642425f8d51
--- /dev/null
+++ b/Source/JavaScriptCore/inspector/protocol/Playwright.json
@@ -0,0 +1,310 @@
+{
+    "domain": "Playwright",
+    "availability": ["web"],
+    "types": [
+        {
+            "id": "ContextID",
+            "type": "string",
+            "description": "Id of Browser context."
+        },
+        {
+            "id": "PageProxyID",
+            "type": "string",
+            "description": "Id of WebPageProxy."
+        },
+        {
+            "id": "CookieSameSitePolicy",
+            "type": "string",
+            "enum": ["None", "Lax", "Strict"],
+            "description": "Same-Site policy of a cookie."
+        },
+        {
+            "id": "Cookie",
+            "type": "object",
+            "description": "Cookie object",
+            "properties": [
+                { "name": "name", "type": "string", "description": "Cookie name." },
+                { "name": "value", "type": "string", "description": "Cookie value." },
+                { "name": "domain", "type": "string", "description": "Cookie domain." },
+                { "name": "path", "type": "string", "description": "Cookie path." },
+                { "name": "expires", "type": "number", "description": "Cookie expires." },
+                { "name": "httpOnly", "type": "boolean", "description": "True if cookie is http-only." },
+                { "name": "secure", "type": "boolean", "description": "True if cookie is secure." },
+                { "name": "session", "type": "boolean", "description": "True if cookie is session cookie." },
+                { "name": "sameSite", "$ref": "CookieSameSitePolicy", "description": "Cookie Same-Site policy." }
+            ]
+        },
+        {
+            "id": "SetCookieParam",
+            "type": "object",
+            "description": "Cookie object",
+            "properties": [
+                { "name": "name", "type": "string", "description": "Cookie name." },
+                { "name": "value", "type": "string", "description": "Cookie value." },
+                { "name": "domain", "type": "string", "description": "Cookie domain." },
+                { "name": "path", "type": "string", "description": "Cookie path." },
+                { "name": "expires", "type": "number", "optional": true, "description": "Cookie expires." },
+                { "name": "httpOnly", "type": "boolean", "optional": true, "description": "True if cookie is http-only." },
+                { "name": "secure", "type": "boolean", "optional": true, "description": "True if cookie is secure." },
+                { "name": "session", "type": "boolean", "optional": true, "description": "True if cookie is session cookie." },
+                { "name": "sameSite", "$ref": "CookieSameSitePolicy", "optional": true, "description": "Cookie Same-Site policy." }
+            ]
+        },
+        {
+            "id": "NameValue",
+            "type": "object",
+            "description": "Name-value pair",
+            "properties": [
+                { "name": "name", "type": "string" },
+                { "name": "value", "type": "string" }
+            ]
+        },
+        {
+            "id": "OriginStorage",
+            "type": "object",
+            "description": "Origin object",
+            "properties": [
+                { "name": "origin", "type": "string", "description": "Origin." },
+                { "name": "items", "type": "array", "items": { "$ref": "NameValue" }, "description": "Storage entries." }
+            ]
+        },
+        {
+            "id": "Geolocation",
+            "type": "object",
+            "description": "Geolocation",
+            "properties": [
+                { "name": "timestamp", "type": "number", "description": "Mock latitude" },
+                { "name": "latitude", "type": "number", "description": "Mock latitude" },
+                { "name": "longitude", "type": "number", "description": "Mock longitude" },
+                { "name": "accuracy", "type": "number", "description": "Mock accuracy" }
+            ]
+        }
+    ],
+    "commands": [
+        {
+            "name": "enable"
+        },
+        {
+            "name": "disable"
+        },
+        {
+            "name": "getInfo",
+            "returns": [
+                { "name": "os", "type": "string", "description": "Name of the operating system where the browser is running (macOS, Linux or Windows)." }
+            ]
+        },
+        {
+            "name": "close",
+            "async": true,
+            "description": "Close browser."
+        },
+        {
+            "name": "createContext",
+            "description": "Creates new ephemeral browser context.",
+            "parameters": [
+                { "name": "proxyServer", "type": "string", "optional": true, "description": "Proxy server, similar to the one passed to --proxy-server" },
+                { "name": "proxyBypassList", "type": "string", "optional": true, "description": "Proxy bypass list, similar to the one passed to --proxy-bypass-list" },
+                { "name": "enableStoragePartitioning", "type": "boolean", "optional": true, "description": "Wether to use storage partitioning. Be default Playwright disables the partitioning." }
+            ],
+            "returns": [
+                { "name": "browserContextId", "$ref": "ContextID", "description": "Unique identifier of the context." }
+            ]
+        },
+        {
+            "name": "deleteContext",
+            "async": true,
+            "description": "Deletes browser context previously created with createContect. The command will automatically close all pages that use the context.",
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "description": "Identifier of the context to delete." }
+            ]
+        },
+        {
+            "name": "createPage",
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "JSON Inspector Protocol message (command) to be dispatched on the backend." }
+            ],
+            "returns": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." }
+            ]
+        },
+        {
+            "name": "navigate",
+            "async": true,
+            "description": "Navigates current page to the given URL.",
+            "parameters": [
+                { "name": "url", "type": "string", "description": "URL to navigate the page to." },
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "frameId", "$ref": "Network.FrameId", "optional": true, "description": "Id of the frame to navigate."},
+                { "name": "referrer", "type": "string", "optional": true, "description": "Referrer URL." }
+            ],
+            "returns": [
+                { "name": "loaderId", "$ref": "Network.LoaderId", "optional": true, "description": "Identifier of the loader associated with the navigation." }
+            ]
+        },
+        {
+            "name": "grantFileReadAccess",
+            "description": "Grants read access for the specified files to the web process of the page.",
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "paths", "type": "array", "items": { "type": "string" }, "description": "Id of the frame to navigate."}
+            ]
+        },
+        {
+            "name": "takePageScreenshot",
+            "description": "Capture a snapshot of the page.",
+            "async": true,
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "x", "type": "integer", "description": "X coordinate" },
+                { "name": "y", "type": "integer", "description": "Y coordinate" },
+                { "name": "width", "type": "integer", "description": "Rectangle width" },
+                { "name": "height", "type": "integer", "description": "Rectangle height" },
+                { "name": "omitDeviceScaleFactor", "type": "boolean", "optional": true, "description": "By default, screenshot is inflated by device scale factor to avoid blurry image. This flag disables it." }
+            ],
+            "returns": [
+                { "name": "dataURL", "type": "string", "description": "Base64-encoded image data (PNG)." }
+            ]
+        },
+        {
+            "name": "setIgnoreCertificateErrors",
+            "description": "Change whether all certificate errors should be ignored.",
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." },
+                { "name": "ignore", "type": "boolean" }
+            ]
+        },
+        {
+            "name": "setPageZoomFactor",
+            "description": "Changes page zoom factor.",
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "zoomFactor", "type": "number" }
+            ]
+        },
+        {
+            "name": "getAllCookies",
+            "description": "Returns all cookies in the given browser context.",
+            "async": true,
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." }
+            ],
+            "returns": [
+                { "name": "cookies", "type": "array", "items": { "$ref": "Cookie" }, "description": "Cookies." }
+            ]
+        },
+        {
+            "name": "setCookies",
+            "description": "Sets cookies in the given browser context.",
+            "async": true,
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." },
+                { "name": "cookies", "type": "array", "items": { "$ref": "SetCookieParam" }, "description": "Cookies." }
+            ]
+        },
+        {
+            "name": "deleteAllCookies",
+            "description": "Deletes cookies in the given browser context.",
+            "async": true,
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." }
+            ]
+        },
+        {
+            "name": "setGeolocationOverride",
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." },
+                { "name": "geolocation", "$ref": "Geolocation", "optional": true, "description": "Geolocation to set, if missing emulates position unavailable." }
+            ],
+            "description": "Overrides the geolocation position or error."
+        },
+        {
+            "name": "setLanguages",
+            "description": "Allows to set locale language for context.",
+            "parameters": [
+                { "name": "languages", "type": "array", "items": { "type": "string" } },
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." }
+            ]
+        },
+        {
+            "name": "setDownloadBehavior",
+            "description": "Allows to override download behavior.",
+            "parameters": [
+                { "name": "behavior", "optional": true, "type": "string", "enum": ["allow", "deny"] },
+                { "name": "downloadPath", "optional": true, "type": "string" },
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." }
+            ]
+        },
+        {
+            "name": "cancelDownload",
+            "parameters": [
+                { "name": "uuid", "type": "string" }
+            ],
+            "description": "Cancels a current running download."
+        },
+        {
+            "name": "clearMemoryCache",
+            "description": "Clears browser memory cache.",
+            "async": true,
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "optional": true, "description": "Browser context id." }
+            ]
+        }
+    ],
+    "events": [
+        {
+            "name": "pageProxyCreated",
+            "parameters": [
+                { "name": "browserContextId", "$ref": "ContextID", "description": "Unique identifier of the context." },
+                { "name": "pageProxyId", "$ref": "PageProxyID" },
+                { "name": "openerId", "$ref": "PageProxyID", "optional": true, "description": "Unique identifier of the opening page. Only set for pages created by window.open()." }
+            ]
+        },
+        {
+            "name": "pageProxyDestroyed",
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID" }
+            ]
+        },
+        {
+            "name": "provisionalLoadFailed",
+            "description": "Fired when provisional load fails.",
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "loaderId", "$ref": "Network.LoaderId", "description": "Identifier of the loader associated with the navigation." },
+                { "name": "error", "type": "string", "description": "Localized error string." }
+            ]
+        },
+        {
+          "name": "windowOpen",
+          "description": "Fired when page opens a new window.",
+          "parameters": [
+              { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+              { "name": "url", "type": "string" },
+              { "name": "windowFeatures", "type": "array", "items": { "type": "string" } }
+          ]
+        },
+        {
+            "name": "downloadCreated",
+            "parameters": [
+                { "name": "pageProxyId", "$ref": "PageProxyID", "description": "Unique identifier of the page proxy." },
+                { "name": "frameId", "$ref": "Network.FrameId", "description": "Unique identifier of the originating frame." },
+                { "name": "uuid", "type": "string" },
+                { "name": "url", "type": "string" }
+            ]
+        },
+        {
+            "name": "downloadFilenameSuggested",
+            "parameters": [
+                { "name": "uuid", "type": "string" },
+                { "name": "suggestedFilename", "type": "string" }
+            ]
+        },
+        {
+            "name": "downloadFinished",
+            "parameters": [
+                { "name": "uuid", "type": "string" },
+                { "name": "error", "type": "string" }
+            ]
+        }
+    ]
+}
diff --git a/Source/JavaScriptCore/inspector/protocol/Runtime.json b/Source/JavaScriptCore/inspector/protocol/Runtime.json
index b8c2c5b7c4a4411affc4d928521f809bc468673c..b0134b3d794df05a6386ed012715bb47519248f2 100644
--- a/Source/JavaScriptCore/inspector/protocol/Runtime.json
+++ b/Source/JavaScriptCore/inspector/protocol/Runtime.json
@@ -272,6 +272,13 @@
             ],
             "async": true
         },
+        {
+          "name": "addBinding",
+          "description": "Adds binding with the given name on the global objects of all inspected contexts. Each binding function call produces Runtime.bindingCalled event.",
+          "parameters": [
+              { "name": "name", "type": "string", "description": "Name of the bound function." }
+          ]
+        },
         {
             "name": "getPreview",
             "description": "Returns a preview for the given object.",
@@ -408,6 +415,15 @@
             "parameters": [
                 { "name": "context", "$ref": "ExecutionContextDescription", "description": "A newly created execution context." }
             ]
-        }
+        },
+        {
+          "name": "bindingCalled",
+          "description": "Issued when new execution context is created.",
+          "parameters": [
+              { "name": "contextId", "$ref": "ExecutionContextId", "description": "Id of the execution context where the binding was called." },
+              { "name": "name", "type": "string", "description": "Name of the bound function." },
+              { "name": "argument", "type": "string", "description": "String argument passed to the function." }
+          ]
+      }
     ]
 }
diff --git a/Source/JavaScriptCore/inspector/protocol/Screencast.json b/Source/JavaScriptCore/inspector/protocol/Screencast.json
new file mode 100644
index 0000000000000000000000000000000000000000..8546676698ddb1e0606068dd99f66cc8cca6357f
--- /dev/null
+++ b/Source/JavaScriptCore/inspector/protocol/Screencast.json
@@ -0,0 +1,47 @@
+{
+    "domain": "Screencast",
+    "availability": ["web"],
+    "types": [
+        {
+            "id": "ScreencastId",
+            "type": "string",
+            "description": "Unique identifier of the screencast."
+        }
+    ],
+    "commands": [
+        {
+            "name": "startScreencast",
+            "description": "Starts screencast.",
+            "parameters": [
+                { "name": "width", "type": "integer" },
+                { "name": "height", "type": "integer" },
+                { "name": "toolbarHeight", "type": "integer" },
+                { "name": "quality", "type": "integer" }
+            ],
+            "returns": [
+                { "name": "generation", "type": "integer", "description": "Screencast session generation." }
+            ]
+        },
+        {
+            "name": "stopScreencast",
+            "description": "Stops screencast."
+        },
+        {
+            "name": "screencastFrameAck",
+            "parameters": [
+                { "name": "generation", "type": "integer", "description": "Screencast session generation" }
+            ]
+        }
+    ],
+    "events": [
+        {
+            "name": "screencastFrame",
+            "parameters": [
+                { "name": "data", "type": "string", "description": "Base64 data" },
+                { "name": "timestamp", "type": "number" },
+                { "name": "deviceWidth", "type": "integer" },
+                { "name": "deviceHeight", "type": "integer" }
+            ]
+        }
+    ]
+}
diff --git a/Source/JavaScriptCore/inspector/protocol/Target.json b/Source/JavaScriptCore/inspector/protocol/Target.json
index a861a83b87e4e7752e547b7070ec1ef26e1cc3e5..16d6ec26034758e127dcb599f5cb170823182470 100644
--- a/Source/JavaScriptCore/inspector/protocol/Target.json
+++ b/Source/JavaScriptCore/inspector/protocol/Target.json
@@ -10,7 +10,7 @@
             "properties": [
                 { "name": "targetId", "type": "string", "description": "Unique identifier for the target." },
                 { "name": "type", "type": "string", "enum": ["page", "frame", "service-worker", "worker"] },
-                { "name": "isProvisional", "type": "boolean", "optional": true, "description": "Whether this is a provisional page target." },
+                { "name": "isProvisional", "type": "boolean", "optional": true, "description": "True value indicates that this is a provisional page target i.e. Such target may be created when current page starts cross-origin navigation. Eventually each provisional target is either committed and swaps with the current target or gets destroyed, e.g. in case of load request failure." },
                 { "name": "isPaused", "type": "boolean", "optional": true, "description": "Whether the target is paused on start and has to be explicitely resumed by inspector." }
             ]
         }
@@ -37,6 +37,21 @@
                 { "name": "targetId", "type": "string" },
                 { "name": "message", "type": "string", "description": "JSON Inspector Protocol message (command) to be dispatched on the backend." }
             ]
+        },
+        {
+            "name": "activate",
+            "description": "Reveals the target on screen.",
+            "parameters": [
+                { "name": "targetId", "type": "string" }
+            ]
+        },
+        {
+            "name": "close",
+            "description": "Closes the target.",
+            "parameters": [
+                { "name": "targetId", "type": "string" },
+                { "name": "runBeforeUnload", "type": "boolean", "optional": true }
+            ]
         }
     ],
     "events": [
@@ -49,7 +64,8 @@
         {
             "name": "targetDestroyed",
             "parameters": [
-                { "name": "targetId", "type": "string" }
+                { "name": "targetId", "type": "string" },
+                { "name": "crashed", "type": "boolean" }
             ]
         },
         {
diff --git a/Source/JavaScriptCore/runtime/ConsoleClient.h b/Source/JavaScriptCore/runtime/ConsoleClient.h
index 6af957ee69490bad4443e90161adc2230c329105..1270e77b913578ba8965fdd30c4bd44687d891ab 100644
--- a/Source/JavaScriptCore/runtime/ConsoleClient.h
+++ b/Source/JavaScriptCore/runtime/ConsoleClient.h
@@ -74,6 +74,7 @@ public:
     virtual void record(JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) = 0;
     virtual void recordEnd(JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) = 0;
     virtual void screenshot(JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) = 0;
+    virtual void bindingCalled(JSGlobalObject*, const String& name, const String& arg) = 0;
 
 private:
     enum class ArgumentRequirement { No, Yes };
diff --git a/Source/ThirdParty/skia/CMakeLists.txt b/Source/ThirdParty/skia/CMakeLists.txt
index 607a4b0f761b0aadd3ca8b83e080519ad6f97715..609f5b23e6ebd2629a1313673d9d8ea5d6fc57b7 100644
--- a/Source/ThirdParty/skia/CMakeLists.txt
+++ b/Source/ThirdParty/skia/CMakeLists.txt
@@ -10,6 +10,8 @@ if (USE_SKIA_ENCODERS)
     find_package(WebP REQUIRED COMPONENTS mux)
 endif ()
 
+find_package(Threads REQUIRED)
+
 if (ANDROID)
     find_package(EXPAT REQUIRED)
 endif ()
@@ -970,6 +972,7 @@ endif ()
 target_link_libraries(Skia PRIVATE
     JPEG::JPEG
     PNG::PNG
+    Threads::Threads
 )
 
 WEBKIT_ADD_TARGET_CXX_FLAGS(Skia
diff --git a/Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml b/Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml
index 991cbe56d742a6cdd31d5a142754675272d4abd8..ce7e004a533d87765976b46e1d538799d2226af5 100644
--- a/Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml
+++ b/Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml
@@ -605,6 +605,7 @@ ApplePayEnabled:
   richJavaScript: true
 
 # FIXME: This is on by default in WebKit2 PLATFORM(COCOA). Perhaps we should consider turning it on for WebKitLegacy as well.
+# Playwright: enable on all platforms to align with Safari.
 AsyncClipboardAPIEnabled:
   type: bool
   status: mature
@@ -615,7 +616,7 @@ AsyncClipboardAPIEnabled:
       default: false
     WebKit:
       "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)" : true
-      default: false
+      default: true
     WebCore:
       default: false
 
@@ -871,13 +872,10 @@ BlobFileAccessEnforcementEnabled:
   sharedPreferenceForWebProcess: true
   defaultValue:
     WebKitLegacy:
-      "PLATFORM(COCOA)": true
       default: false
     WebKit:
-      "PLATFORM(COCOA)": true
       default: false
     WebCore:
-      "PLATFORM(COCOA)": true
       default: false
 
 BlockIOKitInWebContentSandbox:
@@ -2073,6 +2071,7 @@ CrossOriginEmbedderPolicyEnabled:
     WebCore:
       default: false
 
+# Playwright: disable setting.
 CrossOriginOpenerPolicyEnabled:
   type: bool
   status: stable
@@ -2146,6 +2145,7 @@ DOMAudioSessionFullEnabled:
     WebCore:
       default: false
 
+# Playwright: enable on all platforms to align with Safari.
 DOMPasteAccessRequestsEnabled:
   type: bool
   status: internal
@@ -2157,7 +2157,7 @@ DOMPasteAccessRequestsEnabled:
       default: false
     WebKit:
       "PLATFORM(IOS) || PLATFORM(MAC) || PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(VISION)": true
-      default: false
+      default: true
     WebCore:
       default: false
 
@@ -2223,10 +2223,10 @@ DataListElementEnabled:
     WebKitLegacy:
       default: false
     WebKit:
-      "(PLATFORM(COCOA) && !PLATFORM(WATCHOS)) || PLATFORM(GTK)": true
+      "(PLATFORM(COCOA) && !PLATFORM(WATCHOS)) || PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN)": true
       default: false
     WebCore:
-      "(PLATFORM(COCOA) && !PLATFORM(WATCHOS)) || PLATFORM(GTK)": true
+      "(PLATFORM(COCOA) && !PLATFORM(WATCHOS)) || PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN)": true
       default: false
   sharedPreferenceForWebProcess: true
 
@@ -2239,7 +2239,7 @@ DataTransferItemsEnabled:
     WebKitLegacy:
       default: true
     WebKit:
-      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)": true
+      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN)": true
       default: false
     WebCore:
       default: false
@@ -2482,7 +2482,7 @@ DirectoryUploadEnabled:
     WebKitLegacy:
       default: false
     WebKit:
-      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)": true
+      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN)": true
       default: false
     WebCore:
       default: false
@@ -3188,10 +3188,10 @@ FullScreenEnabled:
     WebKitLegacy:
       default: false
     WebKit:
-      "PLATFORM(GTK) || PLATFORM(WPE)": true
+      "PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
     WebCore:
-      "PLATFORM(GTK) || PLATFORM(WPE)": true
+      "PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
   sharedPreferenceForWebProcess: true
 
@@ -3503,7 +3503,7 @@ HardwareAccelerationEnabled:
   status: internal
   humanReadableName: "Hardware acceleration"
   humanReadableDescription: "Enable hardware acceleration"
-  condition: PLATFORM(GTK) || ENABLE(WPE_PLATFORM)
+  condition: PLATFORM(GTK) || PLATFORM(WPE)
   defaultValue:
     WebKitLegacy:
       default: true
@@ -3910,7 +3910,7 @@ InputTypeColorEnabled:
     WebKitLegacy:
       default: false
     WebKit:
-      "PLATFORM(COCOA) && !PLATFORM(WATCHOS) || PLATFORM(GTK)": true
+      "PLATFORM(COCOA) && !PLATFORM(WATCHOS) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
     WebCore:
       default: false
@@ -3943,7 +3943,7 @@ InputTypeDateEnabled:
       "PLATFORM(IOS_FAMILY)": true
       default: false
     WebKit:
-      "PLATFORM(COCOA) || PLATFORM(GTK)": true
+      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
     WebCore:
       default: false
@@ -3959,7 +3959,7 @@ InputTypeDateTimeLocalEnabled:
       "PLATFORM(IOS_FAMILY)": true
       default: false
     WebKit:
-      "PLATFORM(COCOA) || PLATFORM(GTK)": true
+      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
     WebCore:
       default: false
@@ -3991,7 +3991,7 @@ InputTypeTimeEnabled:
       "PLATFORM(IOS_FAMILY)": true
       default: false
     WebKit:
-      "PLATFORM(COCOA) || PLATFORM(GTK)": true
+      "PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)": true
       default: false
     WebCore:
       default: false
@@ -4052,6 +4052,7 @@ InspectorMaximumResourcesContentSize:
       "PLATFORM(WPE)": 50
       default: 200
 
+# Playwright: disable setting.
 InspectorStartsAttached:
   type: bool
   status: embedder
@@ -4059,7 +4060,7 @@ InspectorStartsAttached:
   exposed: [ WebKit ]
   defaultValue:
     WebKit:
-      default: true
+      default: false
 
 InspectorSupportsShowingCertificate:
   type: bool
@@ -6266,7 +6267,7 @@ PointerLockEnabled:
       "PLATFORM(IOS_FAMILY)": false
       default: true
     WebCore:
-      default: false
+      default: true
 
 PopoverAttributeEnabled:
   type: bool
@@ -6896,7 +6897,7 @@ ScreenOrientationAPIEnabled:
     WebKitLegacy:
       default: false
     WebKit:
-      default: WebKit::defaultShouldEnableScreenOrientationAPI()
+      default: true
     WebCore:
       default: false
   sharedPreferenceForWebProcess: true
diff --git a/Source/WTF/wtf/PlatformEnable.h b/Source/WTF/wtf/PlatformEnable.h
index 7219e25002712fb773a8dd1c7c601e60b63c5d14..3d3054fbce6dda47761e0a1c1533a51764bf79ba 100644
--- a/Source/WTF/wtf/PlatformEnable.h
+++ b/Source/WTF/wtf/PlatformEnable.h
@@ -455,7 +455,7 @@
 
 // ORIENTATION_EVENTS should never get enabled on Desktop, only Mobile.
 #if !defined(ENABLE_ORIENTATION_EVENTS)
-#define ENABLE_ORIENTATION_EVENTS 0
+#define ENABLE_ORIENTATION_EVENTS 1
 #endif
 
 #if OS(WINDOWS)
@@ -568,7 +568,7 @@
 #endif
 
 #if !defined(ENABLE_TOUCH_EVENTS)
-#define ENABLE_TOUCH_EVENTS 0
+#define ENABLE_TOUCH_EVENTS 1
 #endif
 
 #if !defined(ENABLE_CSS_TAP_HIGHLIGHT_COLOR) && ENABLE(TOUCH_EVENTS)
diff --git a/Source/WTF/wtf/PlatformEnableCocoa.h b/Source/WTF/wtf/PlatformEnableCocoa.h
index cfa2003ccb9464bbf804c4aa37a283110ac0fbfd..3db834d1a46023ed7a3cdffd64b012ab882aa8c9 100644
--- a/Source/WTF/wtf/PlatformEnableCocoa.h
+++ b/Source/WTF/wtf/PlatformEnableCocoa.h
@@ -822,7 +822,7 @@
 #endif
 
 #if !defined(ENABLE_SEC_ITEM_SHIM)
-#define ENABLE_SEC_ITEM_SHIM 1
+#define ENABLE_SEC_ITEM_SHIM 0
 #endif
 
 #if !defined(ENABLE_SERVER_PRECONNECT)
diff --git a/Source/WTF/wtf/StdLibExtras.h b/Source/WTF/wtf/StdLibExtras.h
index ebdcb2707223f582f378d83ccbf31aa115724047..cc2d26b056618c847d6e184f73fff1701d5b921d 100644
--- a/Source/WTF/wtf/StdLibExtras.h
+++ b/Source/WTF/wtf/StdLibExtras.h
@@ -1607,6 +1607,39 @@ template<typename T, typename U> constexpr auto forward_like(U&& value) -> detai
 template<typename T, typename U> constexpr auto forward_like_preserving_const(U&& value) -> detail::forward_like_preserving_const_impl<T, U> { return static_cast<detail::forward_like_preserving_const_impl<T, U>>(value); }
 } // namespace WTF
 
+#if defined(__GLIBCXX__) && !defined(__cpp_lib_ranges_zip)
+#include <wtf/ZippedRange.h>
+
+namespace std::ranges {
+
+struct _Zip {
+    template<typename... _Ts>
+    requires (sizeof...(_Ts) <= 2)
+    constexpr auto
+    operator() [[nodiscard]] (_Ts&&... __ts) const {
+        if constexpr (!sizeof...(_Ts)) {
+            return views::empty<tuple<>>;
+        } else if constexpr (sizeof...(_Ts) == 1) {
+            return [](auto&& arg1, auto&&...) {
+                return std::forward<decltype(arg1)>(arg1);
+            }(std::forward<_Ts>(__ts)...);
+        } else {
+            return [](auto&& arg1, auto&& arg2, auto&&...) {
+                return zippedRange(std::forward<decltype(arg1)>(arg1), std::forward<decltype(arg2)>(arg2));
+            }(std::forward<_Ts>(__ts)...);
+        }
+    }
+};
+
+namespace views {
+    inline constexpr _Zip zip;
+}
+
+using WTF::zippedRange;
+
+} // namespace std::ranges
+#endif // defined(__GLIBCXX__) && !defined(__cpp_lib_ranges_zip)
+
 using WTF::GB;
 using WTF::KB;
 using WTF::MB;
diff --git a/Source/WTF/wtf/unicode/UTF8Conversion.h b/Source/WTF/wtf/unicode/UTF8Conversion.h
index 8f551b2abcca06a623c432ac52db75de16849e8e..92bbd90bd032b9a9290ec741e7b38f9e9438f97e 100644
--- a/Source/WTF/wtf/unicode/UTF8Conversion.h
+++ b/Source/WTF/wtf/unicode/UTF8Conversion.h
@@ -30,6 +30,11 @@
 #include <wtf/ExportMacros.h>
 #include <wtf/text/Latin1Character.h>
 
+// Can be probably removed when we drop Debian 11.
+#ifdef Success
+#undef Success
+#endif
+
 namespace WTF {
 namespace Unicode {
 
diff --git a/Source/WebCore/DerivedSources.make b/Source/WebCore/DerivedSources.make
index e98fccbdefe93270040e91cb9fef8e28879c7dec..5187df2924731e17a779a23e5fd51eafadd8bb0e 100644
--- a/Source/WebCore/DerivedSources.make
+++ b/Source/WebCore/DerivedSources.make
@@ -1257,6 +1257,10 @@ JS_BINDING_IDLS := \
     $(WebCore)/dom/SubscriberCallback.idl \
     $(WebCore)/dom/SubscriptionObserver.idl \
     $(WebCore)/dom/SubscriptionObserverCallback.idl \
+    $(WebCore)/dom/Document+Touch.idl \
+    $(WebCore)/dom/Touch.idl \
+    $(WebCore)/dom/TouchEvent.idl \
+    $(WebCore)/dom/TouchList.idl \
     $(WebCore)/dom/Text.idl \
     $(WebCore)/dom/TextDecoder.idl \
     $(WebCore)/dom/TextDecoderStream.idl \
@@ -1881,9 +1885,6 @@ JS_BINDING_IDLS := \
 ADDITIONAL_BINDING_IDLS = \
     DocumentTouch.idl \
     GestureEvent.idl \
-    Touch.idl \
-    TouchEvent.idl \
-    TouchList.idl \
 #
 
 vpath %.in $(WEBKITADDITIONS_HEADER_SEARCH_PATHS)
diff --git a/Source/WebCore/Modules/geolocation/Geolocation.cpp b/Source/WebCore/Modules/geolocation/Geolocation.cpp
index f468a12c6cae3ecc22fd9d7eacccb55c199f4dab..7fdb15208f24e4c91267c7d9fb776b774e5dfdda 100644
--- a/Source/WebCore/Modules/geolocation/Geolocation.cpp
+++ b/Source/WebCore/Modules/geolocation/Geolocation.cpp
@@ -365,8 +365,9 @@ bool Geolocation::shouldBlockGeolocationRequests()
 
     bool isSecure = SecurityOrigin::isSecure(document->url()) || document->isSecureContext();
     bool isLocalOrigin = securityOrigin()->isLocal();
+    bool isPotentiallyTrustworthy = securityOrigin()->isPotentiallyTrustworthy();
     if (document->canAccessResource(ScriptExecutionContext::ResourceType::Geolocation) != ScriptExecutionContext::HasResourceAccess::No) {
-        if (isLocalOrigin || isSecure)
+        if (isLocalOrigin || isSecure  || isPotentiallyTrustworthy)
             return false;
     }
 
diff --git a/Source/WebCore/Modules/speech/cocoa/WebSpeechRecognizerTask.mm b/Source/WebCore/Modules/speech/cocoa/WebSpeechRecognizerTask.mm
index de8ce576a7e7156460680e5ea11f10a84cda83ec..3b502fa4663dc528cb892d28e5217c4ec8bb7ea4 100644
--- a/Source/WebCore/Modules/speech/cocoa/WebSpeechRecognizerTask.mm
+++ b/Source/WebCore/Modules/speech/cocoa/WebSpeechRecognizerTask.mm
@@ -198,6 +198,7 @@ - (void)sendEndIfNeeded
 
 - (void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidChange:(BOOL)available
 {
+    UNUSED_PARAM(speechRecognizer);
     ASSERT(isMainThread());
 
     if (available || !_task)
@@ -211,6 +212,7 @@ - (void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidC
 
 - (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didHypothesizeTranscription:(SFTranscription *)transcription
 {
+    UNUSED_PARAM(task);
     ASSERT(isMainThread());
 
     [self sendSpeechStartIfNeeded];
@@ -219,6 +221,7 @@ - (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didHypothesizeTran
 
 - (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didFinishRecognition:(SFSpeechRecognitionResult *)recognitionResult
 {
+    UNUSED_PARAM(task);
     ASSERT(isMainThread());
 
     if (task.state == SFSpeechRecognitionTaskStateCanceling || (!_doMultipleRecognitions && task.state == SFSpeechRecognitionTaskStateCompleted))
@@ -232,6 +235,7 @@ - (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didFinishRecogniti
 
 - (void)speechRecognitionTaskWasCancelled:(SFSpeechRecognitionTask *)task
 {
+    UNUSED_PARAM(task);
     ASSERT(isMainThread());
 
     [self sendSpeechEndIfNeeded];
diff --git a/Source/WebCore/PlatformWin.cmake b/Source/WebCore/PlatformWin.cmake
index 72b2846f2c82818fc9a64fd90b7cba0c0601e15f..22277ab6c3233f040852d9daf9becf7ba81d12ca 100644
--- a/Source/WebCore/PlatformWin.cmake
+++ b/Source/WebCore/PlatformWin.cmake
@@ -217,6 +217,7 @@ if (USE_CAIRO)
         platform/graphics/win/cairo/MediaPlayerPrivateMediaFoundationCairo.cpp
 
         platform/win/cairo/DragImageWinCairo.cpp
+        platform/win/DragImageWin.cpp
     )
 elseif (USE_SKIA)
     list(APPEND WebCore_SOURCES
diff --git a/Source/WebCore/SourcesCocoa.txt b/Source/WebCore/SourcesCocoa.txt
index 0630227f46780e9af2a5442c8f6807f2e889b011..acb032704a3b778b9c184afb02f7cb70450de1b0 100644
--- a/Source/WebCore/SourcesCocoa.txt
+++ b/Source/WebCore/SourcesCocoa.txt
@@ -746,3 +746,9 @@ testing/cocoa/WebViewVisualIdentificationOverlay.mm @nonARC
 platform/graphics/angle/GraphicsContextGLANGLE.cpp @no-unify
 platform/graphics/cocoa/GraphicsContextGLCocoa.mm @nonARC @no-unify
 platform/graphics/cv/GraphicsContextGLCVCocoa.mm @nonARC @no-unify
+
+// Playwright begin
+JSTouch.cpp
+JSTouchEvent.cpp
+JSTouchList.cpp
+// Playwright end
diff --git a/Source/WebCore/SourcesGTK.txt b/Source/WebCore/SourcesGTK.txt
index 8c4a4c5e75fc792adb0c0801b3e81fd220df777c..99da4150c59018176142f34ebfccd4053c55fc49 100644
--- a/Source/WebCore/SourcesGTK.txt
+++ b/Source/WebCore/SourcesGTK.txt
@@ -107,3 +107,10 @@ platform/unix/LoggingUnix.cpp
 platform/unix/SharedMemoryUnix.cpp
 
 platform/xdg/MIMETypeRegistryXdg.cpp
+
+// Playwright: begin.
+JSSpeechSynthesisErrorCode.cpp
+JSSpeechSynthesisErrorEvent.cpp
+JSSpeechSynthesisErrorEventInit.cpp
+JSSpeechSynthesisEventInit.cpp
+// Playwright: end.
diff --git a/Source/WebCore/SourcesWPE.txt b/Source/WebCore/SourcesWPE.txt
index eb48da502311408b4772385e51b4143da28fc5d0..0cbc5941fa1c659f5a76f77cc4b22ee5842e77af 100644
--- a/Source/WebCore/SourcesWPE.txt
+++ b/Source/WebCore/SourcesWPE.txt
@@ -114,3 +114,8 @@ platform/wpe/PasteboardWPE.cpp
 platform/wpe/PlatformScreenWPE.cpp
 
 platform/xdg/MIMETypeRegistryXdg.cpp
+
+JSSpeechSynthesisErrorCode.cpp
+JSSpeechSynthesisErrorEvent.cpp
+JSSpeechSynthesisErrorEventInit.cpp
+JSSpeechSynthesisEventInit.cpp
diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
index 308d7803e73db4277cd404ddb1314d29d3dba836..9526210649e3d9f55ec524547be40f3087aaa9dd 100644
--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
@@ -6992,6 +6992,13 @@
 		EE6C530F2F8831FF00C7B706 /* RenderTreeOrder.h in Headers */ = {isa = PBXBuildFile; fileRef = EE6C530D2F8830BD00C7B706 /* RenderTreeOrder.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		EEE349082DE0061C00A7D4BB /* StyleScopeIdentifier.h in Headers */ = {isa = PBXBuildFile; fileRef = EEE349072DE005FC00A7D4BB /* StyleScopeIdentifier.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		EFCC6C8F20FE914400A2321B /* CanvasActivityRecord.h in Headers */ = {isa = PBXBuildFile; fileRef = EFCC6C8D20FE914000A2321B /* CanvasActivityRecord.h */; settings = {ATTRIBUTES = (Private, ); }; };
+		F050E16823AC9C080011CE47 /* PlatformTouchEvent.h in Headers */ = {isa = PBXBuildFile; fileRef = F050E16623AC9C070011CE47 /* PlatformTouchEvent.h */; settings = {ATTRIBUTES = (Private, ); }; };
+		F050E16A23AD660C0011CE47 /* Touch.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F050E16923AD660C0011CE47 /* Touch.cpp */; };
+		F050E16D23AD66630011CE47 /* TouchList.h in Headers */ = {isa = PBXBuildFile; fileRef = F050E16B23AD66620011CE47 /* TouchList.h */; settings = {ATTRIBUTES = (Private, ); }; };
+		F050E16E23AD66630011CE47 /* TouchList.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F050E16C23AD66630011CE47 /* TouchList.cpp */; };
+		F050E17123AD669F0011CE47 /* TouchEvent.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F050E16F23AD669E0011CE47 /* TouchEvent.cpp */; };
+		F050E17423AD6A800011CE47 /* DocumentTouch.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F050E17323AD6A800011CE47 /* DocumentTouch.cpp */; };
+		F050E17823AD70C50011CE47 /* PlatformTouchPoint.h in Headers */ = {isa = PBXBuildFile; fileRef = F050E17623AD70C40011CE47 /* PlatformTouchPoint.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		F12171F616A8CF0B000053CA /* WebVTTElement.h in Headers */ = {isa = PBXBuildFile; fileRef = F12171F416A8BC63000053CA /* WebVTTElement.h */; };
 		F30EE46B2E721BA800935B60 /* FrameInspectorController.h in Headers */ = {isa = PBXBuildFile; fileRef = F30EE46A2E721B9D00935B60 /* FrameInspectorController.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		F32BDCD92363AACA0073B6AE /* UserGestureEmulationScope.h in Headers */ = {isa = PBXBuildFile; fileRef = F32BDCD72363AACA0073B6AE /* UserGestureEmulationScope.h */; };
@@ -22710,6 +22717,14 @@
 		EFCC6C8D20FE914000A2321B /* CanvasActivityRecord.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CanvasActivityRecord.h; sourceTree = "<group>"; };
 		F088343F2E721B29001B2348 /* AXLocalFrame.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AXLocalFrame.h; sourceTree = "<group>"; };
 		F08834402E721B33001B2348 /* AXLocalFrame.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = AXLocalFrame.cpp; sourceTree = "<group>"; };
+		F050E16623AC9C070011CE47 /* PlatformTouchEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PlatformTouchEvent.h; sourceTree = "<group>"; };
+		F050E16923AD660C0011CE47 /* Touch.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Touch.cpp; path = dom/Touch.cpp; sourceTree = SOURCE_ROOT; };
+		F050E16B23AD66620011CE47 /* TouchList.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = TouchList.h; path = dom/TouchList.h; sourceTree = SOURCE_ROOT; };
+		F050E16C23AD66630011CE47 /* TouchList.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = TouchList.cpp; path = dom/TouchList.cpp; sourceTree = SOURCE_ROOT; };
+		F050E16F23AD669E0011CE47 /* TouchEvent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = TouchEvent.cpp; path = dom/TouchEvent.cpp; sourceTree = SOURCE_ROOT; };
+		F050E17023AD669F0011CE47 /* TouchEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = TouchEvent.h; path = dom/TouchEvent.h; sourceTree = SOURCE_ROOT; };
+		F050E17323AD6A800011CE47 /* DocumentTouch.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = DocumentTouch.cpp; sourceTree = "<group>"; };
+		F050E17623AD70C40011CE47 /* PlatformTouchPoint.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PlatformTouchPoint.h; sourceTree = "<group>"; };
 		F12171F316A8BC63000053CA /* WebVTTElement.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebVTTElement.cpp; sourceTree = "<group>"; };
 		F12171F416A8BC63000053CA /* WebVTTElement.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebVTTElement.h; sourceTree = "<group>"; };
 		F30EE46A2E721B9D00935B60 /* FrameInspectorController.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FrameInspectorController.h; sourceTree = "<group>"; };
@@ -30743,6 +30758,11 @@
 				BC4A5324256055590028C592 /* TextDirectionSubmenuInclusionBehavior.h */,
 				2D4F96F11A1ECC240098BF88 /* TextIndicator.cpp */,
 				2D4F96F21A1ECC240098BF88 /* TextIndicator.h */,
+				F050E16923AD660C0011CE47 /* Touch.cpp */,
+				F050E16F23AD669E0011CE47 /* TouchEvent.cpp */,
+				F050E17023AD669F0011CE47 /* TouchEvent.h */,
+				F050E16C23AD66630011CE47 /* TouchList.cpp */,
+				F050E16B23AD66620011CE47 /* TouchList.h */,
 				F48570A42644C76D00C05F71 /* TranslationContextMenuInfo.h */,
 				D640B24C2E3058C800EB6C49 /* UADataValues.h */,
 				D640B24E2E3058C800EB6C49 /* UADataValues.idl */,
@@ -38753,6 +38773,8 @@
 				29E4D8DF16B0940F00C84704 /* PlatformSpeechSynthesizer.h */,
 				1AD8F81A11CAB9E900E93E54 /* PlatformStrategies.cpp */,
 				1AD8F81911CAB9E900E93E54 /* PlatformStrategies.h */,
+				F050E16623AC9C070011CE47 /* PlatformTouchEvent.h */,
+				F050E17623AD70C40011CE47 /* PlatformTouchPoint.h */,
 				FE3DC9932D0C063C0021B6FC /* PlatformTZoneImpls.cpp */,
 				0FD7C21D23CE41E30096D102 /* PlatformWheelEvent.cpp */,
 				935C476A09AC4D4F00A6AAB4 /* PlatformWheelEvent.h */,
@@ -41766,6 +41788,7 @@
 				AD6E71AB1668899D00320C13 /* DocumentSharedObjectPool.h */,
 				6BDB5DC1227BD3B800919770 /* DocumentStorageAccess.cpp */,
 				6BDB5DC0227BD3B800919770 /* DocumentStorageAccess.h */,
+				F050E17323AD6A800011CE47 /* DocumentTouch.cpp */,
 				7CE7FA5B1EF882300060C9D6 /* DocumentTouch.cpp */,
 				7CE7FA591EF882300060C9D6 /* DocumentTouch.h */,
 				A8185F3209765765005826D9 /* DocumentType.cpp */,
@@ -46955,6 +46978,8 @@
 				F4E90A3C2B52038E002DA469 /* PlatformTextAlternatives.h in Headers */,
 				0F7D07331884C56C00B4AF86 /* PlatformTextTrack.h in Headers */,
 				074E82BB18A69F0E007EF54C /* PlatformTimeRanges.h in Headers */,
+				F050E16823AC9C080011CE47 /* PlatformTouchEvent.h in Headers */,
+				F050E17823AD70C50011CE47 /* PlatformTouchPoint.h in Headers */,
 				CDD08ABD277E542600EA3755 /* PlatformTrackConfiguration.h in Headers */,
 				CD1F9B022700323D00617EB6 /* PlatformVideoColorPrimaries.h in Headers */,
 				CD1F9B01270020B700617EB6 /* PlatformVideoColorSpace.h in Headers */,
@@ -48629,6 +48654,7 @@
 				0F54DD081881D5F5003EEDBB /* Touch.h in Headers */,
 				71B7EE0D21B5C6870031C1EF /* TouchAction.h in Headers */,
 				0F54DD091881D5F5003EEDBB /* TouchEvent.h in Headers */,
+				F050E16D23AD66630011CE47 /* TouchList.h in Headers */,
 				0F54DD0A1881D5F5003EEDBB /* TouchList.h in Headers */,
 				070334D71459FFD5008D8D45 /* TrackBase.h in Headers */,
 				513C7B6E2E7C2E7A00079881 /* TrackInfo.h in Headers */,
@@ -49903,7 +49929,9 @@
 				2D22830323A8470700364B7E /* CursorMac.mm in Sources */,
 				5CBD59592280E926002B22AA /* CustomHeaderFields.cpp in Sources */,
 				07E4BDBF2A3A5FAB000D5509 /* DictationCaretAnimator.cpp in Sources */,
+				F050E17423AD6A800011CE47 /* DocumentTouch.cpp in Sources */,
 				0749E9512E275A23009B912B /* EditingHTMLConverter.mm in Sources */,
+				329C0C2528BD96EB00F187D2 /* ElementName.cpp in Sources */,
 				7CE6CBFD187F394900D46BF5 /* FormatConverter.cpp in Sources */,
 				4667EA3E2968D9DA00BAB1E2 /* GameControllerHapticEffect.mm in Sources */,
 				46FE73D32968E52000B8064C /* GameControllerHapticEngines.mm in Sources */,
@@ -50000,6 +50028,9 @@
 				072F696F2E755BFA00281FC5 /* TextListParser.cpp in Sources */,
 				BE39137129B267F500FA5D4F /* TextTransformCocoa.cpp in Sources */,
 				51DF6D800B92A18E00C2DC85 /* ThreadCheck.mm in Sources */,
+				F050E16A23AD660C0011CE47 /* Touch.cpp in Sources */,
+				F050E17123AD669F0011CE47 /* TouchEvent.cpp in Sources */,
+				F050E16E23AD66630011CE47 /* TouchList.cpp in Sources */,
 				0D0B4DA32EBD20E30053FB12 /* UnifiedSource1-ARC.mm in Sources */,
 				538EC8031F96AF81004D22A8 /* UnifiedSource1-nonARC.mm in Sources */,
 				538EC8021F96AF81004D22A8 /* UnifiedSource1.cpp in Sources */,
diff --git a/Source/WebCore/css/query/MediaQueryFeatures.cpp b/Source/WebCore/css/query/MediaQueryFeatures.cpp
index ab1b8b7d0e7baff7d7564609736a6145472c2e3a..00921097a9f2b5d96937785e62f5a3533afafe55 100644
--- a/Source/WebCore/css/query/MediaQueryFeatures.cpp
+++ b/Source/WebCore/css/query/MediaQueryFeatures.cpp
@@ -404,7 +404,11 @@ static const IdentifierSchema& forcedColorsFeatureSchema()
         "forced-colors"_s,
         FixedVector { CSSValueNone, CSSValueActive },
         OptionSet<MediaQueryDynamicDependency>(),
-        [](auto&) {
+        [](auto& context) {
+            auto* page = context.document->frame()->page();
+            std::optional<bool> forcedColorsOverride = page->useForcedColorsOverride();
+            if (forcedColorsOverride)
+                return forcedColorsOverride.value() ? MatchingIdentifiers { CSSValueActive } : MatchingIdentifiers { CSSValueNone };
             return MatchingIdentifiers { CSSValueNone };
         }
     };
@@ -592,6 +596,9 @@ static const IdentifierSchema& prefersReducedMotionFeatureSchema()
         [](auto& context) {
             bool userPrefersReducedMotion = [&] {
                 Ref frame = *context.document->frame();
+                std::optional<bool> reducedMotionOverride = frame->page()->useReducedMotionOverride();
+                if (reducedMotionOverride)
+                    return reducedMotionOverride.value();
                 switch (frame->settings().forcedPrefersReducedMotionAccessibilityValue()) {
                 case ForcedAccessibilityValue::On:
                     return true;
diff --git a/Source/WebCore/dom/DataTransfer.cpp b/Source/WebCore/dom/DataTransfer.cpp
index 6fac2c209afa640cf7a305c9c322791c0cce2435..a609e0272959a42dec0e44cfd943ab6a8d78865a 100644
--- a/Source/WebCore/dom/DataTransfer.cpp
+++ b/Source/WebCore/dom/DataTransfer.cpp
@@ -531,6 +531,14 @@ Ref<DataTransfer> DataTransfer::createForDrag(const Document& document)
     return adoptRef(*new DataTransfer(StoreMode::ReadWrite, Pasteboard::createForDragAndDrop(PagePasteboardContext::create(document.pageID())), Type::DragAndDropData));
 }
 
+#if PLATFORM(MAC)
+Ref<DataTransfer> DataTransfer::createForDrag(const Document& document, const String& pasteboardName)
+{
+    return adoptRef(*new DataTransfer(StoreMode::ReadWrite, makeUnique<Pasteboard>(PagePasteboardContext::create(document.pageID()), pasteboardName), Type::DragAndDropData));
+}
+#endif
+
+
 Ref<DataTransfer> DataTransfer::createForDragStartEvent(const Document& document)
 {
     auto dataTransfer = adoptRef(*new DataTransfer(StoreMode::ReadWrite, makeUnique<StaticPasteboard>(), Type::DragAndDropData));
diff --git a/Source/WebCore/dom/DataTransfer.h b/Source/WebCore/dom/DataTransfer.h
index 64a53ff58bf7bcd9e56ccc8b74cea8c9c75bf89e..10d52432373f02622328f32d3f665ed0fdd8bc24 100644
--- a/Source/WebCore/dom/DataTransfer.h
+++ b/Source/WebCore/dom/DataTransfer.h
@@ -92,6 +92,9 @@ public:
 
 #if ENABLE(DRAG_SUPPORT)
     static Ref<DataTransfer> createForDrag(const Document&);
+#if PLATFORM(MAC)
+    static Ref<DataTransfer> createForDrag(const Document&, const String& pasteboardName);
+#endif
     static Ref<DataTransfer> createForDragStartEvent(const Document&);
     static Ref<DataTransfer> createForDrop(const Document&, std::unique_ptr<Pasteboard>&&, OptionSet<DragOperation>, bool draggingFiles);
     static Ref<DataTransfer> createForUpdatingDropTarget(const Document&, std::unique_ptr<Pasteboard>&&, OptionSet<DragOperation>, bool draggingFiles);
diff --git a/Source/WebCore/dom/DeviceMotionEvent.idl b/Source/WebCore/dom/DeviceMotionEvent.idl
index a2e91e304c473d6c2de246e51539fac8e265e216..eb3f2a61f74a7d533fcdc5aedecb723be75ba105 100644
--- a/Source/WebCore/dom/DeviceMotionEvent.idl
+++ b/Source/WebCore/dom/DeviceMotionEvent.idl
@@ -20,12 +20,13 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // https://w3c.github.io/deviceorientation/#devicemotionevent
 [
     Conditional=DEVICE_ORIENTATION,
+    EnabledBySetting=DeviceOrientationEventEnabled,
     Exposed=Window,
     SecureContext
 ] interface DeviceMotionEvent : Event {
diff --git a/Source/WebCore/dom/DeviceOrientationEvent.idl b/Source/WebCore/dom/DeviceOrientationEvent.idl
index 2feeeac677ee3f36cb13c2bac1afbc57fbe70e12..6ed92e45b7659c48b3bb1e24f7f0075117178332 100644
--- a/Source/WebCore/dom/DeviceOrientationEvent.idl
+++ b/Source/WebCore/dom/DeviceOrientationEvent.idl
@@ -25,6 +25,7 @@
 
 [
     Conditional=DEVICE_ORIENTATION,
+    EnabledBySetting=DeviceOrientationEventEnabled,
     Exposed=Window,
     SecureContext
 ] interface DeviceOrientationEvent : Event {
diff --git a/Source/WebCore/dom/PointerEvent.cpp b/Source/WebCore/dom/PointerEvent.cpp
index dd8c59fe17c70a72f03df3c884b5a92f8f655e61..9c2b847b15f4361ad8199729c2b808a0253b77c2 100644
--- a/Source/WebCore/dom/PointerEvent.cpp
+++ b/Source/WebCore/dom/PointerEvent.cpp
@@ -20,7 +20,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
@@ -28,7 +28,9 @@
 
 #include "EventNames.h"
 #include "MouseEventTypes.h"
+#include "MouseEvent.h"
 #include "Node.h"
+#include "PlatformTouchEvent.h"
 #include "PointerEventTypeNames.h"
 #include <numbers>
 #include <wtf/TZoneMallocInlines.h>
@@ -380,4 +382,59 @@ double PointerEvent::offsetY()
     return adjustedCoordinateForType(offsetLocation().y());
 }
 
+#if ENABLE(TOUCH_EVENTS) && !PLATFORM(IOS_FAMILY) && !PLATFORM(WPE) && !PLATFORM(GTK)
+
+static const AtomString& pointerEventType(PlatformTouchPoint::State state)
+{
+    switch (state) {
+    case PlatformTouchPoint::State::TouchPressed:
+        return eventNames().pointerdownEvent;
+    case PlatformTouchPoint::State::TouchMoved:
+        return eventNames().pointermoveEvent;
+    case PlatformTouchPoint::State::TouchStationary:
+        return eventNames().pointermoveEvent;
+    case PlatformTouchPoint::State::TouchReleased:
+        return eventNames().pointerupEvent;
+    case PlatformTouchPoint::State::TouchCancelled:
+        return eventNames().pointercancelEvent;
+    case PlatformTouchPoint::State::TouchStateEnd:
+        break;
+    }
+    ASSERT_NOT_REACHED();
+    return nullAtom();
+}
+
+Ref<PointerEvent> PointerEvent::create(const PlatformTouchEvent& event, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&& view, const DoublePoint& touchDelta)
+{
+    const auto& type = pointerEventType(event.touchPoints().at(touchIndex).state());
+    return adoptRef(*new PointerEvent(type, event, coalescedEvents, predictedEvents, typeCanBubble(type), typeIsCancelable(type), touchIndex, isPrimary, WTF::move(view), touchDelta));
+}
+
+Ref<PointerEvent> PointerEvent::create(const PlatformTouchEvent& event, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, CanBubble canBubble, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&& view, const DoublePoint& touchDelta)
+{
+    const auto& type = pointerEventType(event.touchPoints().at(touchIndex).state());
+    return adoptRef(*new PointerEvent(type, event, coalescedEvents, predictedEvents, canBubble, isCancelable, touchIndex, isPrimary, WTF::move(view), touchDelta));
+}
+
+Ref<PointerEvent> PointerEvent::create(const AtomString& type, const PlatformTouchEvent& event, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&& view, const DoublePoint& touchDelta)
+{
+    return adoptRef(*new PointerEvent(type, event, coalescedEvents, predictedEvents, typeCanBubble(type), typeIsCancelable(type), touchIndex, isPrimary, WTF::move(view), touchDelta));
+}
+
+PointerEvent::PointerEvent(const AtomString& type, const PlatformTouchEvent& event, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, CanBubble canBubble, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&& view, const DoublePoint& touchDelta)
+    : MouseEvent(EventInterfaceType::PointerEvent, type, canBubble, isCancelable, typeIsComposed(type), event.timestamp().approximateMonotonicTime(), WTF::move(view), 0,
+        event.touchPoints().at(touchIndex).pos(), event.touchPoints().at(touchIndex).pos(), touchDelta.x(), touchDelta.y(), event.modifiers(), buttonForType(type), buttonsForType(type), nullptr, 0, SyntheticClickType::NoTap, { }, { }, std::nullopt, IsSimulated::No, IsTrusted::Yes)
+    , m_pointerId(event.touchPoints().at(touchIndex).id())
+    , m_width(2 * event.touchPoints().at(touchIndex).radius().width())
+    , m_height(2 * event.touchPoints().at(touchIndex).radius().height())
+    , m_pressure(event.touchPoints().at(touchIndex).force())
+    , m_pointerType(touchPointerEventType())
+    , m_isPrimary(isPrimary)
+    , m_coalescedEvents(coalescedEvents)
+    , m_predictedEvents(predictedEvents)
+{
+}
+
+#endif // ENABLE(TOUCH_EVENTS) && !PLATFORM(IOS_FAMILY) && !PLATFORM(WPE) && !PLATFORM(GTK)
+
 } // namespace WebCore
diff --git a/Source/WebCore/dom/PointerEvent.h b/Source/WebCore/dom/PointerEvent.h
index a9ad0f77eedb629a360c8ec77257e84e59418dbf..3486cfaa73edb83300e597ab3fc8ab115e96ee54 100644
--- a/Source/WebCore/dom/PointerEvent.h
+++ b/Source/WebCore/dom/PointerEvent.h
@@ -41,8 +41,8 @@
 #pragma clang diagnostic pop
 #endif
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(WPE) || PLATFORM(GTK))
-#include "PlatformTouchEvent.h"
+#if ENABLE(TOUCH_EVENTS) && !PLATFORM(IOS_FAMILY)
+#include <WebCore/PlatformTouchEvent.h>
 #endif
 
 namespace WebCore {
@@ -99,14 +99,18 @@ public:
     static Ref<PointerEvent> create(const AtomString& type, MouseButton, const MouseEvent&, PointerID, const String& pointerType, CanBubble, IsCancelable);
     static Ref<PointerEvent> create(const AtomString& type, PointerID, const String& pointerType, IsPrimary = IsPrimary::No);
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
     static Ref<PointerEvent> create(const PlatformTouchEvent&, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&, const DoublePoint& touchDelta = { });
     static Ref<PointerEvent> create(const PlatformTouchEvent&, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, CanBubble, IsCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&& view, const DoublePoint& touchDelta = { });
     static Ref<PointerEvent> create(const AtomString& type, const PlatformTouchEvent&, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&, const DoublePoint& touchDelta = { });
 #endif
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
+#if PLATFORM(WPE) || PLATFORM(GTK)
     static unsigned pointerIdForTouchPoint(const PlatformTouchPoint&);
+#elif !ENABLE(IOS_TOUCH_EVENTS)
+    static unsigned pointerIdForTouchPoint(const PlatformTouchPoint& point) { return point.id();  }
+#endif
 #endif
 
     virtual ~PointerEvent();
@@ -194,7 +198,7 @@ private:
     PointerEvent();
     PointerEvent(const AtomString&, Init&&, IsTrusted);
     PointerEvent(const AtomString& type, PointerID, const String& pointerType, IsPrimary);
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
     PointerEvent(const AtomString& type, const PlatformTouchEvent&, const Vector<Ref<PointerEvent>>& coalescedEvents, const Vector<Ref<PointerEvent>>& predictedEvents, CanBubble canBubble, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&, const DoublePoint& touchDelta = { });
 #endif
 
diff --git a/Source/WebCore/dom/TouchList.h b/Source/WebCore/dom/TouchList.h
index 25546b5bdf24a88141f2a968c07e9d424d61f7e1..980a173d056b6dd4f89ae394dee01b510def691e 100644
--- a/Source/WebCore/dom/TouchList.h
+++ b/Source/WebCore/dom/TouchList.h
@@ -28,8 +28,8 @@
 #include <WebKitAdditions/TouchListIOS.h>
 #elif ENABLE(TOUCH_EVENTS)
 
-#include "Node.h"
-#include "Touch.h"
+#include <WebCore/Node.h>
+#include <WebCore/Touch.h>
 #include <wtf/FixedVector.h>
 #include <wtf/Ref.h>
 #include <wtf/RefCounted.h>
diff --git a/Source/WebCore/editing/libwpe/EditorLibWPE.cpp b/Source/WebCore/editing/libwpe/EditorLibWPE.cpp
index d0a3d5c048647b07772e1581c76c4eb60ecf41b0..bec324636991079264e620c0dfdaf9842ff585cd 100644
--- a/Source/WebCore/editing/libwpe/EditorLibWPE.cpp
+++ b/Source/WebCore/editing/libwpe/EditorLibWPE.cpp
@@ -35,6 +35,7 @@
 #include "Pasteboard.h"
 #include "Settings.h"
 #include "SimpleRange.h"
+#include "WebContentReader.h"
 #include "markup.h"
 
 namespace WebCore {
@@ -100,6 +101,14 @@ void Editor::platformPasteFont()
 {
 }
 
+RefPtr<DocumentFragment> Editor::webContentFromPasteboard(Pasteboard& pasteboard, const SimpleRange& context, bool allowPlainText, bool& chosePlainText)
+{
+    WebContentReader reader(*document().frame(), context, allowPlainText);
+    pasteboard.read(reader);
+    chosePlainText = reader.madeFragmentFromPlainText();
+    return reader.takeFragment();
+}
+
 } // namespace WebCore
 
 #endif // USE(LIBWPE)
diff --git a/Source/WebCore/html/FileInputType.cpp b/Source/WebCore/html/FileInputType.cpp
index 70293a7486130c23eda9198e399f4fc7a998c2b3..1ff1dc564dbe7f2ed2d35000d82bac6e2fb2cad0 100644
--- a/Source/WebCore/html/FileInputType.cpp
+++ b/Source/WebCore/html/FileInputType.cpp
@@ -39,6 +39,7 @@
 #include "HTMLNames.h"
 #include "Icon.h"
 #include "InputTypeNames.h"
+#include "InspectorInstrumentation.h"
 #include "LocalFrame.h"
 #include "LocalizedStrings.h"
 #include "MIMETypeRegistry.h"
@@ -162,6 +163,11 @@ void FileInputType::handleDOMActivateEvent(Event& event)
     if (element()->isDisabledFormControl())
         return;
 
+    bool intercept = false;
+    InspectorInstrumentation::runOpenPanel(element()->document().frame(), element(), &intercept);
+    if (intercept)
+        return;
+
     if (!UserGestureIndicator::processingUserGesture())
         return;
 
diff --git a/Source/WebCore/inspector/FrameInspectorController.cpp b/Source/WebCore/inspector/FrameInspectorController.cpp
index 12650ec508ee1acef286c9b862e37a73f652409f..5721af8def5099347a80e7ad31c7551dbc0be0d5 100644
--- a/Source/WebCore/inspector/FrameInspectorController.cpp
+++ b/Source/WebCore/inspector/FrameInspectorController.cpp
@@ -170,6 +170,12 @@ void FrameInspectorController::connectFrontend(Inspector::FrontendChannel& front
     UNUSED_PARAM(isAutomaticInspection);
     UNUSED_PARAM(immediatelyPause);
 
+    // Playwright begin
+    // Child frames copy parent's frontend connection.
+    if (!m_frame->isMainFrame() && m_frontendRouter->hasFrontends())
+        return;
+    // Playwright end
+
     if (auto* page = m_frame->page())
         page->settings().setDeveloperExtrasEnabled(true);
 
@@ -184,6 +190,19 @@ void FrameInspectorController::connectFrontend(Inspector::FrontendChannel& front
         m_injectedScriptManager->addClient();
         m_agents.didCreateFrontendAndBackend();
     }
+
+    // Playwright begin
+    // Auto attach/enable agents for subframes.
+    if (!m_frame->isMainFrame()) {
+        LocalFrame* localMainFrame = m_frame->page()->localMainFrame();
+        if (localMainFrame) {
+            Ref mainFrameController = localMainFrame->inspectorController();
+            auto* mainFrameConsoleAgent = mainFrameController->m_instrumentingAgents->webConsoleAgent();
+            if (mainFrameConsoleAgent && mainFrameConsoleAgent->enabled())
+                m_instrumentingAgents->webConsoleAgent()->enable();
+        }
+    }
+    // Playwright end
 }
 
 void FrameInspectorController::disconnectFrontend(Inspector::FrontendChannel& frontendChannel)
diff --git a/Source/WebCore/inspector/InspectorIdentifierRegistry.cpp b/Source/WebCore/inspector/InspectorIdentifierRegistry.cpp
index 1585d249dafdc13f4258ff1dde95268eeb329f93..24d21908c7a79e744aadf37a6d8ba0918f2dd7b7 100644
--- a/Source/WebCore/inspector/InspectorIdentifierRegistry.cpp
+++ b/Source/WebCore/inspector/InspectorIdentifierRegistry.cpp
@@ -48,20 +48,22 @@ Protocol::Network::FrameId LegacyIdentifierRegistry::frameId(const WebCore::Fram
 {
     if (!frame)
         return emptyString();
-    return m_frameToIdentifier.ensure(*frame, [this, frame] {
-        auto identifier = IdentifiersFactory::createIdentifier();
-        m_identifierToFrame.set(identifier, frame);
-        return identifier;
-    }).iterator->value;
+
+    auto identifier = String::number(frame->frameID().toUInt64());
+    m_identifierToFrame.set(identifier, frame);
+    return identifier;
 }
 
 Protocol::Network::LoaderId LegacyIdentifierRegistry::loaderId(WebCore::DocumentLoader* loader)
 {
     if (!loader)
         return emptyString();
-    return m_loaderToIdentifier.ensure(loader, [] {
-        return IdentifiersFactory::createIdentifier();
-    }).iterator->value;
+
+    auto navigationID = loader->navigationID();
+    if (!navigationID)
+        return emptyString();
+
+    return String::number(navigationID->toUInt64());
 }
 
 WebCore::LocalFrame* LegacyIdentifierRegistry::assertFrame(Protocol::ErrorString& errorString, const Protocol::Network::FrameId& frameId)
@@ -74,15 +76,19 @@ WebCore::LocalFrame* LegacyIdentifierRegistry::assertFrame(Protocol::ErrorString
 
 Protocol::Network::FrameId LegacyIdentifierRegistry::takeFrame(const WebCore::Frame& frame)
 {
-    auto identifier = m_frameToIdentifier.take(frame);
-    if (!identifier.isNull())
-        m_identifierToFrame.remove(identifier);
+    auto identifier = String::number(frame.frameID().toUInt64());
+    if (!m_identifierToFrame.take(identifier))
+        return {};
     return identifier;
 }
 
 Protocol::Network::LoaderId LegacyIdentifierRegistry::takeLoader(WebCore::DocumentLoader& loader)
 {
-    return m_loaderToIdentifier.take(&loader);
+    auto navigationID = loader.navigationID();
+    if (!navigationID)
+        return {};
+
+    return String::number(navigationID->toUInt64());
 }
 
 } // namespace Inspector
diff --git a/Source/WebCore/inspector/InspectorInstrumentation.cpp b/Source/WebCore/inspector/InspectorInstrumentation.cpp
index 68b5996d7ae96ce0c3f5eda869e353b448823da7..5227faf95b488a3f67e2e63e30089ba9b9cd0d5c 100644
--- a/Source/WebCore/inspector/InspectorInstrumentation.cpp
+++ b/Source/WebCore/inspector/InspectorInstrumentation.cpp
@@ -617,6 +617,12 @@ void InspectorInstrumentation::applyUserAgentOverrideImpl(InstrumentingAgents& i
         pageAgent->applyUserAgentOverride(userAgent);
 }
 
+void InspectorInstrumentation::applyPlatformOverrideImpl(InstrumentingAgents& instrumentingAgents, String& platform)
+{
+    if (auto* pageAgent = instrumentingAgents.enabledPageAgent())
+        pageAgent->applyPlatformOverride(platform);
+}
+
 void InspectorInstrumentation::applyEmulatedMediaImpl(InstrumentingAgents& instrumentingAgents, AtomString& media)
 {
     if (CheckedPtr pageAgent = instrumentingAgents.enabledPageAgent())
@@ -700,6 +706,12 @@ void InspectorInstrumentation::didFailLoadingImpl(InstrumentingAgents& instrumen
         consoleAgent->didFailLoading(identifier, error); // This should come AFTER resource notification, front-end relies on this.
 }
 
+void InspectorInstrumentation::didReceiveMainResourceErrorImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame, const ResourceError&)
+{
+    if (auto* pageRuntimeAgent = instrumentingAgents.enabledPageRuntimeAgent())
+        pageRuntimeAgent->didReceiveMainResourceError(frame);
+}
+
 void InspectorInstrumentation::willLoadXHRSynchronouslyImpl(InstrumentingAgents& instrumentingAgents)
 {
     if (auto* networkAgent = instrumentingAgents.enabledNetworkAgent())
@@ -732,20 +744,17 @@ void InspectorInstrumentation::didReceiveScriptResponseImpl(InstrumentingAgents&
 
 void InspectorInstrumentation::domContentLoadedEventFiredImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame)
 {
-    if (!frame.isMainFrame())
-        return;
-
     if (CheckedPtr pageAgent = instrumentingAgents.enabledPageAgent())
-        pageAgent->domContentEventFired();
+        pageAgent->domContentEventFired(frame);
 }
 
 void InspectorInstrumentation::loadEventFiredImpl(InstrumentingAgents& instrumentingAgents, LocalFrame* frame)
 {
-    if (!frame || !frame->isMainFrame())
+    if (!frame)
         return;
 
     if (CheckedPtr pageAgent = instrumentingAgents.enabledPageAgent())
-        pageAgent->loadEventFired();
+        pageAgent->loadEventFired(*frame);
 }
 
 void InspectorInstrumentation::frameDetachedFromParentImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame)
@@ -825,12 +834,6 @@ void InspectorInstrumentation::frameDocumentUpdatedImpl(InstrumentingAgents& ins
         pageDOMDebuggerAgent->frameDocumentUpdated(frame);
 }
 
-void InspectorInstrumentation::loaderDetachedFromFrameImpl(InstrumentingAgents& instrumentingAgents, DocumentLoader& loader)
-{
-    if (CheckedPtr inspectorPageAgent = instrumentingAgents.enabledPageAgent())
-        inspectorPageAgent->loaderDetachedFromFrame(loader);
-}
-
 void InspectorInstrumentation::frameStartedLoadingImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame)
 {
     if (frame.isMainFrame()) {
@@ -861,6 +864,12 @@ void InspectorInstrumentation::accessibilitySettingsDidChangeImpl(InstrumentingA
         inspectorPageAgent->accessibilitySettingsDidChange();
 }
 
+void InspectorInstrumentation::didNavigateWithinPageImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame)
+{
+    if (InspectorPageAgent* inspectorPageAgent = instrumentingAgents.enabledPageAgent())
+        inspectorPageAgent->didNavigateWithinPage(frame);
+}
+
 #if ENABLE(DARK_MODE_CSS)
 void InspectorInstrumentation::defaultAppearanceDidChangeImpl(InstrumentingAgents& instrumentingAgents)
 {
@@ -913,6 +922,12 @@ void InspectorInstrumentation::interceptResponseImpl(InstrumentingAgents& instru
         networkAgent->interceptResponse(response, identifier, WTF::move(handler));
 }
 
+void InspectorInstrumentation::setStoppingLoadingDueToProcessSwapImpl(InstrumentingAgents& instrumentingAgents, bool value)
+{
+    if (auto* networkAgent = instrumentingAgents.enabledNetworkAgent())
+        networkAgent->setStoppingLoadingDueToProcessSwap(value);
+}
+
 // JavaScriptCore InspectorDebuggerAgent should know Console MessageTypes.
 static bool NODELETE isConsoleAssertMessage(MessageSource source, MessageType type)
 {
@@ -1050,6 +1065,12 @@ void InspectorInstrumentation::consoleStopRecordingCanvasImpl(InstrumentingAgent
         canvasAgent->consoleStopRecordingCanvas(context);
 }
 
+void InspectorInstrumentation::bindingCalledImpl(InstrumentingAgents& instrumentingAgents, JSC::JSGlobalObject* globalObject, const String& name, const String& arg)
+{
+    if (auto* pageRuntimeAgent = instrumentingAgents.enabledPageRuntimeAgent())
+        pageRuntimeAgent->bindingCalled(globalObject, name, arg);
+}
+
 void InspectorInstrumentation::didDispatchDOMStorageEventImpl(InstrumentingAgents& instrumentingAgents, const String& key, const String& oldValue, const String& newValue, StorageType storageType, const SecurityOrigin& securityOrigin)
 {
     if (auto* domStorageAgent = instrumentingAgents.enabledDOMStorageAgent())
@@ -1347,6 +1368,36 @@ void InspectorInstrumentation::renderLayerDestroyedImpl(InstrumentingAgents& ins
         layerTreeAgent->renderLayerDestroyed(renderLayer);
 }
 
+void InspectorInstrumentation::runOpenPanelImpl(InstrumentingAgents& instrumentingAgents, HTMLInputElement* element, bool* intercept)
+{
+    if (InspectorPageAgent* pageAgent = instrumentingAgents.enabledPageAgent())
+        pageAgent->runOpenPanel(element, intercept);
+}
+
+void InspectorInstrumentation::frameAttachedImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame) {
+    if (InspectorPageAgent* pageAgent = instrumentingAgents.enabledPageAgent())
+        pageAgent->frameAttached(frame);
+}
+
+bool InspectorInstrumentation::shouldBypassCSPImpl(InstrumentingAgents& instrumentingAgents)
+{
+    if (InspectorPageAgent* pageAgent = instrumentingAgents.enabledPageAgent())
+        return pageAgent->shouldBypassCSP();
+    return false;
+}
+
+void InspectorInstrumentation::willCheckNavigationPolicyImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame)
+{
+    if (InspectorPageAgent* pageAgent = instrumentingAgents.enabledPageAgent())
+        pageAgent->willCheckNavigationPolicy(frame);
+}
+
+void InspectorInstrumentation::didCheckNavigationPolicyImpl(InstrumentingAgents& instrumentingAgents, LocalFrame& frame, bool cancel)
+{
+    if (InspectorPageAgent* pageAgent = instrumentingAgents.enabledPageAgent())
+        pageAgent->didCheckNavigationPolicy(frame, cancel);
+}
+
 InstrumentingAgents& InspectorInstrumentation::instrumentingAgents(WorkerOrWorkletGlobalScope& globalScope)
 {
     return globalScope.inspectorController().m_instrumentingAgents;
diff --git a/Source/WebCore/inspector/InspectorInstrumentation.h b/Source/WebCore/inspector/InspectorInstrumentation.h
index d3c1a73fd1eaa95dad8e582f8e52ed894a53a8be..24791c5f62638513dd507ff0886ae4d593523919 100644
--- a/Source/WebCore/inspector/InspectorInstrumentation.h
+++ b/Source/WebCore/inspector/InspectorInstrumentation.h
@@ -45,6 +45,7 @@
 #include "LocalFrame.h"
 #include "NodeDocument.h"
 #include "Page.h"
+#include "ResourceError.h"
 #include "ResourceLoader.h"
 #include "ResourceLoaderIdentifier.h"
 #include "StorageArea.h"
@@ -79,6 +80,7 @@ class Document;
 class DocumentLoader;
 class DocumentThreadableLoader;
 class EventListener;
+class HTMLInputElement;
 class HTTPHeaderMap;
 class InspectorTimelineAgent;
 class InstrumentingAgents;
@@ -203,6 +205,7 @@ public:
     static void didRecalculateStyle(Document&);
     static void didScheduleStyleRecalculation(Document&);
     static void applyUserAgentOverride(LocalFrame&, String&);
+    static void applyPlatformOverride(LocalFrame&, String&);
     static void applyEmulatedMedia(LocalFrame&, AtomString&);
 
     static void flexibleBoxRendererBeganLayout(const RenderObject&);
@@ -215,6 +218,7 @@ public:
     static void didReceiveData(LocalFrame*, ResourceLoaderIdentifier, const SharedBuffer*, int encodedDataLength);
     static void didFinishLoading(LocalFrame*, DocumentLoader*, ResourceLoaderIdentifier, const NetworkLoadMetrics&, ResourceLoader*);
     static void didFailLoading(LocalFrame*, DocumentLoader*, ResourceLoaderIdentifier, const ResourceError&);
+    static void didReceiveMainResourceError(LocalFrame&, const ResourceError&);
 
     static void willSendRequest(ServiceWorkerGlobalScope&, ResourceLoaderIdentifier, ResourceRequest&);
     static void didReceiveResourceResponse(ServiceWorkerGlobalScope&, ResourceLoaderIdentifier, const ResourceResponse&);
@@ -241,11 +245,11 @@ public:
     static void frameDetachedFromParent(LocalFrame&);
     static void didCommitLoad(LocalFrame&, DocumentLoader*);
     static void frameDocumentUpdated(LocalFrame&);
-    static void loaderDetachedFromFrame(LocalFrame&, DocumentLoader&);
     static void frameStartedLoading(LocalFrame&);
     static void frameStoppedLoading(LocalFrame&);
     static void didCompleteRenderingFrame(LocalFrame&);
     static void accessibilitySettingsDidChange(Page&);
+    static void didNavigateWithinPage(LocalFrame&);
 #if ENABLE(DARK_MODE_CSS)
     static void defaultAppearanceDidChange(Page&);
 #endif
@@ -256,6 +260,7 @@ public:
     static bool shouldInterceptResponse(const LocalFrame&, const ResourceResponse&);
     static void interceptRequest(ResourceLoader&, Function<void(const ResourceRequest&)>&&);
     static void interceptResponse(const LocalFrame&, const ResourceResponse&, ResourceLoaderIdentifier, CompletionHandler<void(const ResourceResponse&, RefPtr<FragmentedSharedBuffer>)>&&);
+    static void setStoppingLoadingDueToProcessSwap(Page*, bool);
 
     static void addMessageToConsole(LocalFrame&, std::unique_ptr<Inspector::ConsoleMessage>);
     static void addMessageToConsole(WorkerOrWorkletGlobalScope&, std::unique_ptr<Inspector::ConsoleMessage>);
@@ -281,6 +286,7 @@ public:
     static void stopProfiling(WorkerOrWorkletGlobalScope&, const String& title);
     static void consoleStartRecordingCanvas(CanvasRenderingContext&, JSC::JSGlobalObject&, JSC::JSObject* options);
     static void consoleStopRecordingCanvas(CanvasRenderingContext&);
+    static void bindingCalled(Page& , JSC::JSGlobalObject*, const String& name, const String& arg);
 
     static void performanceMark(ScriptExecutionContext&, const String&, std::optional<MonotonicTime>);
 
@@ -337,6 +343,12 @@ public:
     static void layerTreeDidChange(Page*);
     static void renderLayerDestroyed(Page*, const RenderLayer&);
 
+    static void runOpenPanel(LocalFrame*, HTMLInputElement*, bool*);
+    static void frameAttached(LocalFrame*);
+    static bool shouldBypassCSP(ScriptExecutionContext*);
+    static void willCheckNavigationPolicy(LocalFrame&);
+    static void didCheckNavigationPolicy(LocalFrame&, bool cancel);
+
     static void frontendCreated();
     static void frontendDeleted();
     static bool hasFrontends() { return InspectorInstrumentationPublic::hasFrontends(); }
@@ -434,6 +446,7 @@ private:
     static void didRecalculateStyleImpl(InstrumentingAgents&);
     static void didScheduleStyleRecalculationImpl(InstrumentingAgents&, Document&);
     static void applyUserAgentOverrideImpl(InstrumentingAgents&, String&);
+    static void applyPlatformOverrideImpl(InstrumentingAgents&, String&);
     static void applyEmulatedMediaImpl(InstrumentingAgents&, AtomString&);
 
     static void flexibleBoxRendererBeganLayoutImpl(InstrumentingAgents&, const RenderObject&);
@@ -448,6 +461,7 @@ private:
     static void didReceiveDataImpl(InstrumentingAgents&, ResourceLoaderIdentifier, const SharedBuffer*, int encodedDataLength);
     static void didFinishLoadingImpl(InstrumentingAgents&, ResourceLoaderIdentifier, DocumentLoader*, const NetworkLoadMetrics&, ResourceLoader*);
     static void didFailLoadingImpl(InstrumentingAgents&, ResourceLoaderIdentifier, DocumentLoader*, const ResourceError&);
+    static void didReceiveMainResourceErrorImpl(InstrumentingAgents&, LocalFrame&, const ResourceError&);
     static void willLoadXHRSynchronouslyImpl(InstrumentingAgents&);
     static void didLoadXHRSynchronouslyImpl(InstrumentingAgents&);
     static void scriptImportedImpl(InstrumentingAgents&, ResourceLoaderIdentifier, const String& sourceString);
@@ -458,11 +472,11 @@ private:
     static void frameDetachedFromParentImpl(InstrumentingAgents&, LocalFrame&);
     static void didCommitLoadImpl(InstrumentingAgents&, LocalFrame&, DocumentLoader*);
     static void frameDocumentUpdatedImpl(InstrumentingAgents&, LocalFrame&);
-    static void loaderDetachedFromFrameImpl(InstrumentingAgents&, DocumentLoader&);
     static void frameStartedLoadingImpl(InstrumentingAgents&, LocalFrame&);
     static void didCompleteRenderingFrameImpl(InstrumentingAgents&);
     static void frameStoppedLoadingImpl(InstrumentingAgents&, LocalFrame&);
     static void accessibilitySettingsDidChangeImpl(InstrumentingAgents&);
+    static void didNavigateWithinPageImpl(InstrumentingAgents&, LocalFrame&);
 #if ENABLE(DARK_MODE_CSS)
     static void defaultAppearanceDidChangeImpl(InstrumentingAgents&);
 #endif
@@ -473,6 +487,7 @@ private:
     static bool shouldInterceptResponseImpl(InstrumentingAgents&, const ResourceResponse&);
     static void interceptRequestImpl(InstrumentingAgents&, ResourceLoader&, Function<void(const ResourceRequest&)>&&);
     static void interceptResponseImpl(InstrumentingAgents&, const ResourceResponse&, ResourceLoaderIdentifier, CompletionHandler<void(const ResourceResponse&, RefPtr<FragmentedSharedBuffer>)>&&);
+    static void setStoppingLoadingDueToProcessSwapImpl(InstrumentingAgents&, bool);
 
     static void addMessageToConsoleImpl(InstrumentingAgents&, std::unique_ptr<Inspector::ConsoleMessage>);
 
@@ -487,6 +502,7 @@ private:
     static void stopProfilingImpl(InstrumentingAgents&, const String& title);
     static void consoleStartRecordingCanvasImpl(InstrumentingAgents&, CanvasRenderingContext&, JSC::JSGlobalObject&, JSC::JSObject* options);
     static void consoleStopRecordingCanvasImpl(InstrumentingAgents&, CanvasRenderingContext&);
+    static void bindingCalledImpl(InstrumentingAgents&, JSC::JSGlobalObject*, const String& name, const String& arg);
 
     static void performanceMarkImpl(InstrumentingAgents&, const String& label, std::optional<MonotonicTime>);
     static void didEnqueueFirstContentfulPaintImpl(InstrumentingAgents&);
@@ -542,6 +558,12 @@ private:
     static void layerTreeDidChangeImpl(InstrumentingAgents&);
     static void renderLayerDestroyedImpl(InstrumentingAgents&, const RenderLayer&);
 
+    static void runOpenPanelImpl(InstrumentingAgents&, HTMLInputElement*, bool*);
+    static void frameAttachedImpl(InstrumentingAgents&, LocalFrame&);
+    static bool shouldBypassCSPImpl(InstrumentingAgents&);
+    static void willCheckNavigationPolicyImpl(InstrumentingAgents&, LocalFrame&);
+    static void didCheckNavigationPolicyImpl(InstrumentingAgents&, LocalFrame&, bool cancel);
+
     static InstrumentingAgents& NODELETE instrumentingAgents(Page&);
     static InstrumentingAgents& NODELETE instrumentingAgents(const LocalFrame&);
     static InstrumentingAgents& NODELETE instrumentingAgents(const LocalFrameView&);
@@ -1078,6 +1100,12 @@ inline void InspectorInstrumentation::applyUserAgentOverride(LocalFrame& frame,
     applyUserAgentOverrideImpl(instrumentingAgents(frame), userAgent);
 }
 
+inline void InspectorInstrumentation::applyPlatformOverride(LocalFrame& frame, String& platform)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    applyPlatformOverrideImpl(instrumentingAgents(frame), platform);
+}
+
 inline void InspectorInstrumentation::applyEmulatedMedia(LocalFrame& frame, AtomString& media)
 {
     FAST_RETURN_IF_NO_FRONTENDS(void());
@@ -1176,6 +1204,12 @@ inline void InspectorInstrumentation::didFailLoading(ServiceWorkerGlobalScope& g
     didFailLoadingImpl(instrumentingAgents(globalScope), identifier, nullptr, error);
 }
 
+inline void InspectorInstrumentation::didReceiveMainResourceError(LocalFrame& frame, const ResourceError& error)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    didReceiveMainResourceErrorImpl(instrumentingAgents(frame), frame, error);
+}
+
 inline void InspectorInstrumentation::continueAfterXFrameOptionsDenied(LocalFrame& frame, ResourceLoaderIdentifier identifier, DocumentLoader& loader, const ResourceResponse& response)
 {
     // Treat the same as didReceiveResponse.
@@ -1259,12 +1293,6 @@ inline void InspectorInstrumentation::frameDocumentUpdated(LocalFrame& frame)
     frameDocumentUpdatedImpl(instrumentingAgents(frame), frame);
 }
 
-inline void InspectorInstrumentation::loaderDetachedFromFrame(LocalFrame& frame, DocumentLoader& loader)
-{
-    FAST_RETURN_IF_NO_FRONTENDS(void());
-    loaderDetachedFromFrameImpl(instrumentingAgents(frame), loader);
-}
-
 inline void InspectorInstrumentation::frameStartedLoading(LocalFrame& frame)
 {
     FAST_RETURN_IF_NO_FRONTENDS(void());
@@ -1289,6 +1317,12 @@ inline void InspectorInstrumentation::accessibilitySettingsDidChange(Page& page)
     accessibilitySettingsDidChangeImpl(instrumentingAgents(page));
 }
 
+inline void InspectorInstrumentation::didNavigateWithinPage(LocalFrame& frame)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    didNavigateWithinPageImpl(instrumentingAgents(frame), frame);
+}
+
 #if ENABLE(DARK_MODE_CSS)
 inline void InspectorInstrumentation::defaultAppearanceDidChange(Page& page)
 {
@@ -1338,6 +1372,13 @@ inline void InspectorInstrumentation::interceptResponse(const LocalFrame& frame,
     interceptResponseImpl(instrumentingAgents(frame), response, identifier, WTF::move(handler));
 }
 
+inline void InspectorInstrumentation::setStoppingLoadingDueToProcessSwap(Page* page, bool value)
+{
+    ASSERT(InspectorInstrumentationPublic::hasFrontends());
+    if (auto* agents = instrumentingAgents(page))
+        setStoppingLoadingDueToProcessSwapImpl(*agents, value);
+}
+
 inline void InspectorInstrumentation::didDispatchDOMStorageEvent(Page& page, const String& key, const String& oldValue, const String& newValue, StorageType storageType, const SecurityOrigin& securityOrigin)
 {
     FAST_RETURN_IF_NO_FRONTENDS(void());
@@ -1681,6 +1722,11 @@ inline void InspectorInstrumentation::didEnqueueLargestContentfulPaint(ScriptExe
         didEnqueueLargestContentfulPaintImpl(*agents, entry);
 }
 
+inline void InspectorInstrumentation::bindingCalled(Page& page, JSC::JSGlobalObject* globalObject, const String& name, const String& arg)
+{
+    bindingCalledImpl(instrumentingAgents(page), globalObject, name, arg);
+}
+
 inline void InspectorInstrumentation::didRequestAnimationFrame(ScriptExecutionContext& scriptExecutionContext, int callbackId)
 {
     FAST_RETURN_IF_NO_FRONTENDS(void());
@@ -1737,6 +1783,39 @@ inline void InspectorInstrumentation::renderLayerDestroyed(Page* page, const Ren
         renderLayerDestroyedImpl(*agents, renderLayer);
 }
 
+inline void InspectorInstrumentation::runOpenPanel(LocalFrame* frame, HTMLInputElement* element, bool* intercept)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    runOpenPanelImpl(instrumentingAgents(*frame), element, intercept);
+}
+
+inline void InspectorInstrumentation::frameAttached(LocalFrame* frame)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    if (auto* agents = instrumentingAgents(frame))
+        frameAttachedImpl(*agents, *frame);
+}
+
+inline bool InspectorInstrumentation::shouldBypassCSP(ScriptExecutionContext* context)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(false);
+    if (auto* agents = instrumentingAgents(context))
+        return shouldBypassCSPImpl(*agents);
+    return false;
+}
+
+inline void InspectorInstrumentation::willCheckNavigationPolicy(LocalFrame& frame)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    willCheckNavigationPolicyImpl(instrumentingAgents(frame), frame);
+}
+
+inline void InspectorInstrumentation::didCheckNavigationPolicy(LocalFrame& frame, bool cancel)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    didCheckNavigationPolicyImpl(instrumentingAgents(frame), frame, cancel);
+}
+
 inline InstrumentingAgents* InspectorInstrumentation::instrumentingAgents(ScriptExecutionContext* context)
 {
     return context ? instrumentingAgents(*context) : nullptr;
diff --git a/Source/WebCore/inspector/InspectorInstrumentationWebKit.cpp b/Source/WebCore/inspector/InspectorInstrumentationWebKit.cpp
index f866893f2d6d9748b5f58ad28db0bb06398c6f48..294f450025f595b44a3e130c738291e6b45de740 100644
--- a/Source/WebCore/inspector/InspectorInstrumentationWebKit.cpp
+++ b/Source/WebCore/inspector/InspectorInstrumentationWebKit.cpp
@@ -50,4 +50,9 @@ void InspectorInstrumentationWebKit::interceptResponseInternal(const LocalFrame&
     InspectorInstrumentation::interceptResponse(frame, response, identifier, WTF::move(handler));
 }
 
+void InspectorInstrumentationWebKit::setStoppingLoadingDueToProcessSwapInternal(Page* page, bool value)
+{
+    InspectorInstrumentation::setStoppingLoadingDueToProcessSwap(page, value);
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/InspectorInstrumentationWebKit.h b/Source/WebCore/inspector/InspectorInstrumentationWebKit.h
index 01ad196099f09a89717830cd70dded3b495cf5f5..c9d2e97c6f5f5e6b0a8f70c31af947ef2e72af8a 100644
--- a/Source/WebCore/inspector/InspectorInstrumentationWebKit.h
+++ b/Source/WebCore/inspector/InspectorInstrumentationWebKit.h
@@ -33,6 +33,7 @@
 namespace WebCore {
 
 class LocalFrame;
+class Page;
 class ResourceLoader;
 class ResourceRequest;
 class ResourceResponse;
@@ -44,12 +45,14 @@ public:
     static bool shouldInterceptResponse(const LocalFrame*, const ResourceResponse&);
     static void interceptRequest(ResourceLoader&, Function<void(const ResourceRequest&)>&&);
     static void interceptResponse(const LocalFrame*, const ResourceResponse&, ResourceLoaderIdentifier, CompletionHandler<void(const ResourceResponse&, RefPtr<FragmentedSharedBuffer>)>&&);
+    static void setStoppingLoadingDueToProcessSwap(Page*, bool);
 
 private:
     static bool shouldInterceptRequestInternal(const ResourceLoader&);
     static bool shouldInterceptResponseInternal(const LocalFrame&, const ResourceResponse&);
     static void interceptRequestInternal(ResourceLoader&, Function<void(const ResourceRequest&)>&&);
     static void interceptResponseInternal(const LocalFrame&, const ResourceResponse&, ResourceLoaderIdentifier, CompletionHandler<void(const ResourceResponse&, RefPtr<FragmentedSharedBuffer>)>&&);
+    static void setStoppingLoadingDueToProcessSwapInternal(Page*, bool);
 };
 
 inline bool InspectorInstrumentationWebKit::shouldInterceptRequest(const ResourceLoader& loader)
@@ -79,4 +82,10 @@ inline void InspectorInstrumentationWebKit::interceptResponse(const LocalFrame*
     interceptResponseInternal(*frame, response, identifier, WTF::move(handler));
 }
 
+inline void InspectorInstrumentationWebKit::setStoppingLoadingDueToProcessSwap(Page* page, bool value)
+{
+    FAST_RETURN_IF_NO_FRONTENDS(void());
+    setStoppingLoadingDueToProcessSwapInternal(page, value);
+}
+
 }
diff --git a/Source/WebCore/inspector/PageInspectorController.cpp b/Source/WebCore/inspector/PageInspectorController.cpp
index 4fa92ae7d7c2f6e501eecb90691c3dca65e4482e..21dbf683927dec650570a540f0fcd5be6538afa5 100644
--- a/Source/WebCore/inspector/PageInspectorController.cpp
+++ b/Source/WebCore/inspector/PageInspectorController.cpp
@@ -291,6 +291,8 @@ void PageInspectorController::disconnectFrontend(FrontendChannel& frontendChanne
 
         // Unplug all instrumentations since they aren't needed now.
         InspectorInstrumentation::unregisterInstrumentingAgents(m_instrumentingAgents.get());
+
+        m_pauseOnStart = PauseCondition::DONT_PAUSE;
     }
 
     m_inspectorBackendClient->frontendCountChanged(m_frontendRouter->frontendCount());
@@ -305,6 +307,8 @@ void PageInspectorController::disconnectAllFrontends()
     // The frontend should call setInspectorFrontendClient(nullptr) under closeWindow().
     ASSERT(!m_inspectorFrontendClient);
 
+    m_pauseOnStart = PauseCondition::DONT_PAUSE;
+
     if (!m_frontendRouter->hasFrontends())
         return;
 
@@ -384,8 +388,8 @@ void PageInspectorController::inspect(Node* node)
     if (!enabled())
         return;
 
-    if (!hasRemoteFrontend())
-        show();
+    // HACK: Always attempt to show inspector even if there is a remote connection.
+    show();
 
     CheckedRef { ensureDOMAgent() }->inspect(node);
 }
@@ -523,4 +527,34 @@ void PageInspectorController::didComposite(LocalFrame& frame)
     InspectorInstrumentation::didComposite(frame);
 }
 
+void PageInspectorController::pauseOnStart(PauseCondition condition)
+{
+    m_pauseOnStart = condition;
+}
+
+void PageInspectorController::resumeIfPausedInNewWindow()
+{
+    m_pauseOnStart = PauseCondition::DONT_PAUSE;
+}
+
+void PageInspectorController::didFinishPageCreation()
+{
+    if (m_pauseOnStart == PauseCondition::WHEN_CREATION_FINISHED)
+        runLoopWhilePaused();
+}
+
+void PageInspectorController::didShowPage()
+{
+    if (m_pauseOnStart == PauseCondition::WHEN_SHOWN)
+        runLoopWhilePaused();
+}
+
+void PageInspectorController::runLoopWhilePaused()
+{
+    while (m_pauseOnStart != PauseCondition::DONT_PAUSE) {
+        if (RunLoop::cycle() == RunLoop::CycleResult::Stop)
+            break;
+    }
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/PageInspectorController.h b/Source/WebCore/inspector/PageInspectorController.h
index 1418886b19d5310d76deef334ae994ff8afd0562..6217b778b6c0bd73d7da6f9b8ef1454dda156806 100644
--- a/Source/WebCore/inspector/PageInspectorController.h
+++ b/Source/WebCore/inspector/PageInspectorController.h
@@ -117,6 +117,12 @@ public:
     WEBCORE_EXPORT void willComposite(LocalFrame&);
     WEBCORE_EXPORT void didComposite(LocalFrame&);
 
+    enum class PauseCondition { DONT_PAUSE, WHEN_SHOWN, WHEN_CREATION_FINISHED };
+    WEBCORE_EXPORT void pauseOnStart(PauseCondition);
+    WEBCORE_EXPORT void resumeIfPausedInNewWindow();
+    WEBCORE_EXPORT void didShowPage();
+    WEBCORE_EXPORT void didFinishPageCreation();
+
     // Testing support.
     bool isUnderTest() const { return m_isUnderTest; }
     void setIsUnderTest(bool isUnderTest) { m_isUnderTest = isUnderTest; }
@@ -153,6 +159,7 @@ private:
 
     PageAgentContext pageAgentContext();
     void createLazyAgents();
+    void runLoopWhilePaused();
 
     WeakRef<Page> m_page;
     const Ref<InstrumentingAgents> m_instrumentingAgents;
@@ -177,6 +184,7 @@ private:
     bool m_isAutomaticInspection { false };
     bool m_pauseAfterInitialization = { false };
     bool m_didCreateLazyAgents { false };
+    PauseCondition m_pauseOnStart { PauseCondition::DONT_PAUSE };
 };
 
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp b/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
index aee336fcc014831222e12d1806ffc0052e0daed3..88d87a57acf14678214918c5c7a44063951f8b8f 100644
--- a/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
+++ b/Source/WebCore/inspector/agents/InspectorDOMAgent.cpp
@@ -54,6 +54,7 @@
 #include "Cookie.h"
 #include "CookieJar.h"
 #include "CustomElementRegistry.h"
+#include "DirectoryFileListCreator.h"
 #include "DOMEditor.h"
 #include "DOMException.h"
 #include "DOMPatchSupport.h"
@@ -66,10 +67,15 @@
 #include "Event.h"
 #include "EventListener.h"
 #include "EventNames.h"
+#include <FileChooser.h>
+#include "File.h"
+#include "FileList.h"
+#include "FloatQuad.h"
 #include "FrameInlines.h"
 #include "FrameTree.h"
 #include "HTMLElement.h"
 #include "HTMLFrameOwnerElement.h"
+#include "HTMLInputElement.h"
 #include "HTMLMediaElement.h"
 #include "HTMLNames.h"
 #include "HTMLScriptElement.h"
@@ -107,12 +113,14 @@
 #include "Pasteboard.h"
 #include "PseudoElement.h"
 #include "RenderGrid.h"
+#include "RenderLayer.h"
 #include "RenderObject.h"
 #include "RenderStyle.h"
 #include "RenderStyleConstants.h"
 #include "ScriptController.h"
 #include "SelectorChecker.h"
 #include "ShadowRoot.h"
+#include "SharedBuffer.h"
 #include "StaticNodeList.h"
 #include "StyleProperties.h"
 #include "StyleResolver.h"
@@ -156,7 +164,8 @@ using namespace HTMLNames;
 static const size_t maxTextSize = 10000;
 static const char16_t horizontalEllipsisUTF16[] = { horizontalEllipsis, 0 };
 
-static std::optional<Color> parseColor(RefPtr<JSON::Object>&& colorObject)
+// static
+std::optional<Color> InspectorDOMAgent::parseColor(RefPtr<JSON::Object>&& colorObject)
 {
     if (!colorObject)
         return std::nullopt;
@@ -175,7 +184,7 @@ static std::optional<Color> parseColor(RefPtr<JSON::Object>&& colorObject)
 
 static std::optional<Color> parseRequiredConfigColor(const String& fieldName, JSON::Object& configObject)
 {
-    return parseColor(configObject.getObject(fieldName));
+    return InspectorDOMAgent::parseColor(configObject.getObject(fieldName));
 }
 
 static Color parseOptionalConfigColor(const String& fieldName, JSON::Object& configObject)
@@ -202,6 +211,20 @@ static bool parseQuad(Ref<JSON::Array>&& quadArray, FloatQuad* quad)
     return true;
 }
 
+static void CollectQuads(Node* node, Vector<FloatQuad>& quads)
+{
+    Element* element = dynamicDowncast<Element>(node);
+    if (element && element->hasDisplayContents()) {
+        // display:contents elements do not render themselves, so we look into children.
+        for (auto& child : composedTreeChildren(*element))
+            CollectQuads(&child, quads);
+        return;
+    }
+    RenderObject* renderer = node->renderer();
+    if (renderer)
+        renderer->absoluteQuads(quads);
+}
+
 class RevalidateStyleAttributeTask final : public CanMakeCheckedPtr<RevalidateStyleAttributeTask> {
     WTF_MAKE_TZONE_ALLOCATED(RevalidateStyleAttributeTask);
     WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RevalidateStyleAttributeTask);
@@ -485,6 +508,20 @@ Node* InspectorDOMAgent::assertNode(Inspector::Protocol::ErrorString& errorStrin
     return node.unsafeGet();
 }
 
+Node* InspectorDOMAgent::assertNode(Inspector::Protocol::ErrorString& errorString, std::optional<Inspector::Protocol::DOM::NodeId>&& nodeId, const String& objectId)
+{
+    Node* node = nullptr;
+    if (nodeId) {
+        node = assertNode(errorString, *nodeId);
+    } else if (!!objectId) {
+        node = nodeForObjectId(objectId);
+        if (!node)
+            errorString = "Missing node for given objectId"_s;
+    } else
+        errorString = "Either nodeId or objectId must be specified"_s;
+    return node;
+}
+
 Document* InspectorDOMAgent::assertDocument(Inspector::Protocol::ErrorString& errorString, Inspector::Protocol::DOM::NodeId nodeId)
 {
     RefPtr node = assertNode(errorString, nodeId);
@@ -1602,15 +1639,7 @@ Inspector::Protocol::ErrorStringOr<void> InspectorDOMAgent::highlightNode(std::o
 {
     Inspector::Protocol::ErrorString errorString;
 
-    RefPtr<Node> node;
-    if (nodeId)
-        node = assertNode(errorString, *nodeId);
-    else if (!!objectId) {
-        node = nodeForObjectId(objectId);
-        errorString = "Missing node for given objectId"_s;
-    } else
-        errorString = "Either nodeId or objectId must be specified"_s;
-
+    RefPtr<Node> node = assertNode(errorString, WTF::move(nodeId), objectId);
     if (!node)
         return makeUnexpected(errorString);
 
@@ -1861,15 +1890,159 @@ Inspector::Protocol::ErrorStringOr<void> InspectorDOMAgent::setInspectedNode(Ins
     return { };
 }
 
-Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::Runtime::RemoteObject>> InspectorDOMAgent::resolveNode(Inspector::Protocol::DOM::NodeId nodeId, const String& objectGroup)
+static FloatPoint contentsToRootView(LocalFrameView& containingView, const FloatPoint& point)
+{
+    return containingView.convertToRootView(point - toFloatSize(containingView.documentScrollPositionRelativeToViewOrigin()));
+}
+
+static void frameQuadToViewport(LocalFrameView& containingView, FloatQuad& quad, Page& inspectedPage)
+{
+    float pageScaleFactor = inspectedPage.pageScaleFactor();
+    auto mainFrame = inspectedPage.localMainFrame();
+    float scale = pageScaleFactor * mainFrame->pageZoomFactor();
+
+    // Return css (not dip) coordinates by scaling back.
+    quad.setP1(contentsToRootView(containingView, quad.p1()).scaled(1 / scale));
+    quad.setP2(contentsToRootView(containingView, quad.p2()).scaled(1 / scale));
+    quad.setP3(contentsToRootView(containingView, quad.p3()).scaled(1 / scale));
+    quad.setP4(contentsToRootView(containingView, quad.p4()).scaled(1 / scale));
+}
+
+static Ref<Inspector::Protocol::DOM::Quad> buildObjectForQuad(const FloatQuad& quad)
+{
+    auto result = Inspector::Protocol::DOM::Quad::create();
+    result->addItem(quad.p1().x());
+    result->addItem(quad.p1().y());
+    result->addItem(quad.p2().x());
+    result->addItem(quad.p2().y());
+    result->addItem(quad.p3().x());
+    result->addItem(quad.p3().y());
+    result->addItem(quad.p4().x());
+    result->addItem(quad.p4().y());
+    return result;
+}
+
+static Ref<JSON::ArrayOf<Inspector::Protocol::DOM::Quad>> buildArrayOfQuads(const Vector<FloatQuad>& quads)
+{
+    auto result = JSON::ArrayOf<Inspector::Protocol::DOM::Quad>::create();
+    for (const auto& quad : quads)
+        result->addItem(buildObjectForQuad(quad));
+    return result;
+}
+
+Inspector::Protocol::ErrorStringOr<std::tuple<String /* contentFrameId */, String /* ownerFrameId */>> InspectorDOMAgent::describeNode(const String& objectId)
+{
+    Node* node = nodeForObjectId(objectId);
+    if (!node)
+        return makeUnexpected("Node not found"_s);
+
+    auto* pageAgent = m_instrumentingAgents->enabledPageAgent();
+    if (!pageAgent)
+        return makeUnexpected("Page agent must be enabled"_s);
+
+    String ownerFrameId;
+    String frameId = pageAgent->frameId(node->document().frame());
+    if (!frameId.isEmpty())
+        ownerFrameId = frameId;
+
+    String contentFrameId;
+    if (is<HTMLFrameOwnerElement>(*node)) {
+        const auto& frameOwner = downcast<HTMLFrameOwnerElement>(*node);
+        // TODO(playwright): Unnecessary downcast to LocalFrame?
+        String frameId = pageAgent->frameId(dynamicDowncast<LocalFrame>(frameOwner.contentFrame()));
+        if (!frameId.isEmpty())
+            contentFrameId = frameId;
+    }
+
+    return { { contentFrameId, ownerFrameId } };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorDOMAgent::scrollIntoViewIfNeeded(const String& objectId, RefPtr<JSON::Object>&& rect)
+{
+    Node* node = nodeForObjectId(objectId);
+    if (!node)
+        return makeUnexpected("Node not found"_s);
+
+    m_inspectedPage->isolatedUpdateRendering();
+    if (!node->isConnected())
+        return makeUnexpected("Node is detached from document"_s);
+
+    RenderObject* renderer = node->renderer();
+    auto* containerNode = dynamicDowncast<ContainerNode>(*node);
+    if (!renderer && containerNode) {
+        // Find the first descendant with a renderer, to account for
+        // containers without a renderer like display:contents elements.
+        for (auto& descendant : composedTreeDescendants(*containerNode)) {
+            renderer = descendant.renderer();
+            if (renderer)
+                break;
+        }
+    }
+    if (!renderer)
+        return makeUnexpected("Node does not have a layout object"_s);
+
+    bool insideFixed = false;
+    LayoutRect absoluteBounds = renderer->absoluteBoundingBoxRect(true, &insideFixed);
+    if (rect) {
+        std::optional<double> x = rect->getDouble("x"_s);
+        std::optional<double> y = rect->getDouble("y"_s);
+        std::optional<double> width = rect->getDouble("width"_s);
+        std::optional<double> height = rect->getDouble("height"_s);
+        if (!x || !y || !width || !height)
+            return makeUnexpected("Malformed rect"_s);
+
+        absoluteBounds.setX(absoluteBounds.x() + LayoutUnit(*x));
+        absoluteBounds.setY(absoluteBounds.y() + LayoutUnit(*y));
+        absoluteBounds.setWidth(LayoutUnit(std::max(*width, 1.0)));
+        absoluteBounds.setHeight(LayoutUnit(std::max(*height, 1.0)));
+    }
+    ScrollAlignment alignment = ScrollAlignment::alignCenterIfNeeded;
+    alignment.m_enableLegacyHorizontalVisibilityThreshold = false; // Disable RenderLayer minium horizontal scroll threshold.
+    LocalFrameView::scrollRectToVisible(absoluteBounds, *renderer, insideFixed, { SelectionRevealMode::Reveal, alignment, alignment, ShouldAllowCrossOriginScrolling::Yes, ScrollBehavior::Instant });
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<Ref<JSON::ArrayOf<Inspector::Protocol::DOM::Quad>>> InspectorDOMAgent::getContentQuads(const String& objectId)
+{
+    Node* node = nodeForObjectId(objectId);
+    if (!node)
+        return makeUnexpected("Node not found"_s);
+
+    // Ensure quads are up to date.
+    m_inspectedPage->isolatedUpdateRendering();
+
+    LocalFrameView* containingView = node->document().view();
+    if (!containingView)
+        return makeUnexpected("Internal error: no containing view"_s);
+
+    Vector<FloatQuad> quads;
+    CollectQuads(node, quads);
+    for (auto& quad : quads)
+        frameQuadToViewport(*containingView, quad, m_inspectedPage.get());
+    return buildArrayOfQuads(quads);
+}
+
+Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::Runtime::RemoteObject>> InspectorDOMAgent::resolveNode(std::optional<Inspector::Protocol::DOM::NodeId>&& nodeId, const String& objectId, const Inspector::Protocol::Network::FrameId& frameId, std::optional<int>&& contextId, const String& objectGroup)
 {
     Inspector::Protocol::ErrorString errorString;
+    RefPtr<Node> node = nullptr;
+    if (!!frameId) {
+        auto* pageAgent = m_instrumentingAgents->enabledPageAgent();
+        if (!pageAgent)
+            return makeUnexpected("Page domain must be enabled"_s);
 
-    RefPtr node = assertNode(errorString, nodeId);
+        auto* frame = pageAgent->assertFrame(errorString, frameId);
+        if (!frame)
+            return makeUnexpected(errorString);
+
+        node = frame->ownerElement();
+    } else {
+        node = assertNode(errorString, WTF::move(nodeId), objectId);
+    }
     if (!node)
         return makeUnexpected(errorString);
 
-    auto object = resolveNode(node.get(), objectGroup);
+    auto object = resolveNode(node.get(), objectGroup, WTF::move(contextId));
     if (!object)
         return makeUnexpected("Missing injected script for given nodeId"_s);
 
@@ -3133,7 +3306,7 @@ Inspector::Protocol::ErrorStringOr<Inspector::Protocol::DOM::NodeId> InspectorDO
     return makeUnexpected("Missing node for given path"_s);
 }
 
-RefPtr<Inspector::Protocol::Runtime::RemoteObject> InspectorDOMAgent::resolveNode(Node* node, const String& objectGroup)
+RefPtr<Inspector::Protocol::Runtime::RemoteObject> InspectorDOMAgent::resolveNode(Node* node, const String& objectGroup, std::optional<int>&& contextId)
 {
     RefPtr document = &node->document();
     if (auto* templateHost = document->templateDocumentHost())
@@ -3142,12 +3315,18 @@ RefPtr<Inspector::Protocol::Runtime::RemoteObject> InspectorDOMAgent::resolveNod
     if (!frame)
         return nullptr;
 
-    auto& globalObject = mainWorldGlobalObject(*frame);
-    auto injectedScript = m_injectedScriptManager->injectedScriptFor(&globalObject);
+    InjectedScript injectedScript;
+    if (contextId) {
+        injectedScript = m_injectedScriptManager->injectedScriptForId(*contextId);
+    } else {
+        auto& globalObject = mainWorldGlobalObject(*frame);
+        injectedScript = m_injectedScriptManager->injectedScriptFor(&globalObject);
+    }
+
     if (injectedScript.hasNoValue())
         return nullptr;
 
-    return injectedScript.wrapObject(nodeAsScriptValue(globalObject, node), objectGroup);
+    return injectedScript.wrapObject(nodeAsScriptValue(*injectedScript.globalObject(), node), objectGroup);
 }
 
 Node* InspectorDOMAgent::scriptValueAsNode(JSC::JSValue value)
@@ -3301,4 +3480,53 @@ Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::DOM::MediaStats>> In
 #endif
 }
 
+void InspectorDOMAgent::setInputFiles(const String& objectId, Ref<JSON::Array>&& paths, Ref<SetInputFilesCallback>&& callback) {
+    InjectedScript injectedScript = m_injectedScriptManager->injectedScriptForObjectId(objectId);
+    if (injectedScript.hasNoValue()) {
+        callback->sendFailure("Can not find element's context for given id"_s);
+        return;
+    }
+
+    Node* node = scriptValueAsNode(injectedScript.findObjectById(objectId));
+    if (!node) {
+        callback->sendFailure("Can not find element for given id"_s);
+        return;
+    }
+
+    if (node->nodeType() != NodeType::Element || node->nodeName() != "INPUT"_s) {
+        callback->sendFailure("Not an input node"_s);
+        return;
+    }
+
+    HTMLInputElement* element = static_cast<HTMLInputElement*>(node);
+    Vector<Ref<File>> fileObjects;
+    if (element->hasAttributeWithoutSynchronization(webkitdirectoryAttr)) {
+        auto directoryFileListCreator = DirectoryFileListCreator::create([element = RefPtr { element }, callback = WTF::move(callback)](Ref<FileList>&& fileList) mutable {
+            ASSERT(isMainThread());
+            element->setFiles(WTF::move(fileList));
+            callback->sendSuccess();
+        });
+        Vector<FileChooserFileInfo> fileChooserFiles;
+        for (size_t i = 0; i < paths->length(); ++i) {
+            fileChooserFiles.append(FileChooserFileInfo { paths->get(i)->asString(), nullString(), { } });
+        }
+        directoryFileListCreator->start(m_document.get(), fileChooserFiles);
+    } else {
+        for (unsigned i = 0; i < paths->length(); ++i) {
+            RefPtr<JSON::Value> item = paths->get(i);
+            String path = item->asString();
+            if (path.isEmpty()) {
+                callback->sendFailure("Invalid file path"_s);
+                return;
+            }
+
+            ScriptExecutionContext* context = element->scriptExecutionContext();
+            fileObjects.append(File::create(context, path));
+        }
+        RefPtr<FileList> fileList = FileList::create(WTF::move(fileObjects));
+        element->setFiles(WTF::move(fileList));
+        callback->sendSuccess();
+    }
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/agents/InspectorDOMAgent.h b/Source/WebCore/inspector/agents/InspectorDOMAgent.h
index 8f83cc5eaca550bbcea167c98b944f704d9a9cb1..2f655b6534f1428a23907e1cada99c244a9a2c98 100644
--- a/Source/WebCore/inspector/agents/InspectorDOMAgent.h
+++ b/Source/WebCore/inspector/agents/InspectorDOMAgent.h
@@ -62,6 +62,7 @@ namespace WebCore {
 
 class AXCoreObject;
 class CharacterData;
+class Color;
 class DOMEditor;
 class Document;
 class Element;
@@ -98,6 +99,7 @@ public:
     static String toErrorString(Exception&&);
 
     static String documentURLString(Document*);
+    static std::optional<Color> parseColor(RefPtr<JSON::Object>&&);
 
     // We represent embedded doms as a part of the same hierarchy. Hence we treat children of frame owners differently.
     // We also skip whitespace text nodes conditionally. Following methods encapsulate these specifics.
@@ -143,7 +145,7 @@ public:
     Inspector::Protocol::ErrorStringOr<std::tuple<String /* searchId */, int /* resultCount */>> performSearch(const String& query, RefPtr<JSON::Array>&& nodeIds, std::optional<bool>&& caseSensitive);
     Inspector::Protocol::ErrorStringOr<Ref<JSON::ArrayOf<Inspector::Protocol::DOM::NodeId>>> getSearchResults(const String& searchId, int fromIndex, int toIndex);
     Inspector::Protocol::ErrorStringOr<void> discardSearchResults(const String& searchId);
-    Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::Runtime::RemoteObject>> resolveNode(Inspector::Protocol::DOM::NodeId, const String& objectGroup);
+    Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::Runtime::RemoteObject>> resolveNode(std::optional<Inspector::Protocol::DOM::NodeId>&& nodeId, const String& objectId, const Inspector::Protocol::Network::FrameId& frameId, std::optional<int>&& contextId, const String& objectGroup);
     Inspector::Protocol::ErrorStringOr<Ref<JSON::ArrayOf<String>>> getAttributes(Inspector::Protocol::DOM::NodeId);
 #if PLATFORM(IOS_FAMILY)
     Inspector::Protocol::ErrorStringOr<void> setInspectModeEnabled(bool, RefPtr<JSON::Object>&& highlightConfig, RefPtr<JSON::Object>&& gridOverlayConfig, RefPtr<JSON::Object>&& flexOverlayConfig);
@@ -180,6 +182,10 @@ public:
     Inspector::Protocol::ErrorStringOr<void> setInspectedNode(Inspector::Protocol::DOM::NodeId);
     Inspector::Protocol::ErrorStringOr<void> setAllowEditingUserAgentShadowTrees(bool);
     Inspector::Protocol::ErrorStringOr<Ref<Inspector::Protocol::DOM::MediaStats>> getMediaStats(Inspector::Protocol::DOM::NodeId);
+    Inspector::Protocol::ErrorStringOr<std::tuple<String /* contentFrameId */, String /* ownerFrameId */>> describeNode(const String& objectId);
+    Inspector::Protocol::ErrorStringOr<void> scrollIntoViewIfNeeded(const String& objectId, RefPtr<JSON::Object>&& rect);
+    Inspector::Protocol::ErrorStringOr<Ref<JSON::ArrayOf<Inspector::Protocol::DOM::Quad>>> getContentQuads(const String& objectId);
+    void setInputFiles(const String& objectId, Ref<JSON::Array>&& paths, Ref<SetInputFilesCallback>&& callback);
 
     // InspectorInstrumentation
     Inspector::Protocol::DOM::NodeId identifierForNode(Node&);
@@ -221,7 +227,7 @@ public:
     Node* nodeForId(Inspector::Protocol::DOM::NodeId);
     Inspector::Protocol::DOM::NodeId boundNodeId(const Node*);
 
-    RefPtr<Inspector::Protocol::Runtime::RemoteObject> resolveNode(Node*, const String& objectGroup);
+    RefPtr<Inspector::Protocol::Runtime::RemoteObject> resolveNode(Node*, const String& objectGroup, std::optional<int>&& contextId);
     bool handleMousePress();
     void mouseDidMoveOverElement(const HitTestResult&, OptionSet<PlatformEventModifier>);
     void inspect(Node*);
@@ -233,12 +239,15 @@ public:
     void reset();
 
     Node* assertNode(Inspector::Protocol::ErrorString&, Inspector::Protocol::DOM::NodeId);
+    Node* assertNode(Inspector::Protocol::ErrorString&, std::optional<Inspector::Protocol::DOM::NodeId>&& nodeId, const String& objectId);
     Element* assertElement(Inspector::Protocol::ErrorString&, Inspector::Protocol::DOM::NodeId);
     Document* assertDocument(Inspector::Protocol::ErrorString&, Inspector::Protocol::DOM::NodeId);
 
     RefPtr<JSC::Breakpoint> breakpointForEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
     Inspector::Protocol::DOM::EventListenerId idForEventListener(EventTarget&, const AtomString& eventType, EventListener&, bool capture);
 
+    Node* nodeForObjectId(const Inspector::Protocol::Runtime::RemoteObjectId&);
+
 private:
 #if ENABLE(VIDEO)
     void mediaMetricsTimerFired();
@@ -268,7 +277,6 @@ private:
     void processAccessibilityChildren(AXCoreObject&, JSON::ArrayOf<Inspector::Protocol::DOM::NodeId>&);
 
     RefPtr<Node> nodeForPath(const String& path);
-    Node* nodeForObjectId(const Inspector::Protocol::Runtime::RemoteObjectId&);
 
     void discardBindings();
 
diff --git a/Source/WebCore/inspector/agents/InspectorNetworkAgent.cpp b/Source/WebCore/inspector/agents/InspectorNetworkAgent.cpp
index dd164a0c7161396ee21bc3e1e4f7889f5ddbb770..58a528c6ac0efea4b383688d5369606013282075 100644
--- a/Source/WebCore/inspector/agents/InspectorNetworkAgent.cpp
+++ b/Source/WebCore/inspector/agents/InspectorNetworkAgent.cpp
@@ -62,6 +62,7 @@
 #include "LocalFrame.h"
 #include "MIMETypeRegistry.h"
 #include "MemoryCache.h"
+#include "NetworkStateNotifier.h"
 #include "Page.h"
 #include "PlatformStrategies.h"
 #include "ProgressTracker.h"
@@ -275,8 +276,8 @@ static Ref<Inspector::Protocol::Network::Request> buildObjectForResourceRequest(
         .release();
 
     if (request.httpBody() && !request.httpBody()->isEmpty()) {
-        auto bytes = request.httpBody()->flatten();
-        requestObject->setPostData(String::fromUTF8WithLatin1Fallback(bytes.span()));
+        Vector<uint8_t> bytes = request.httpBody()->flatten();
+        requestObject->setPostData(base64EncodeToString(bytes));
     }
 
     if (resourceLoader) {
@@ -328,6 +329,8 @@ RefPtr<Inspector::Protocol::Network::Response> InspectorNetworkAgent::buildObjec
         .setSource(responseSource(response.source()))
         .release();
 
+    responseObject->setRequestHeaders(buildObjectForHeaders(response.m_httpRequestHeaderFields));
+
     if (resourceLoader) {
         auto* metrics = response.deprecatedNetworkLoadMetricsOrNull();
         responseObject->setTiming(buildObjectForTiming(metrics ? *metrics : NetworkLoadMetrics::emptyMetrics(), *resourceLoader));
@@ -522,7 +525,7 @@ void InspectorNetworkAgent::didReceiveResponse(ResourceLoaderIdentifier identifi
     // 'Raw' is used for loading worker scripts, and those should stay as 'Script' and not change to 'XHR' type.
     if (type != newType && newType != ResourceType::XHR && newType != ResourceType::Other)
         type = newType;
-    
+
     // FIXME: <webkit.org/b/216125> 304 Not Modified responses for XHR/Fetch do not have all their information from the cache.
     if (isNotModified && (type == ResourceType::XHR || type == ResourceType::Fetch) && (!cachedResource || !cachedResource->encodedSize())) {
         if (auto previousResourceData = m_resourcesData->dataForURL(response.url().string())) {
@@ -533,12 +536,12 @@ void InspectorNetworkAgent::didReceiveResponse(ResourceLoaderIdentifier identifi
                     m_resourcesData->maybeAddResourceData(requestId, buffer);
                 });
             }
-            
+
             resourceResponse->setString("mimeType"_s, previousResourceData->mimeType());
-            
+
             resourceResponse->setInteger("status"_s, previousResourceData->httpStatusCode());
             resourceResponse->setString("statusText"_s, previousResourceData->httpStatusText());
-            
+
             resourceResponse->setString("source"_s, Inspector::Protocol::Helpers::getEnumConstantValue(Inspector::Protocol::Network::Response::Source::DiskCache));
         }
     }
@@ -617,6 +620,9 @@ void InspectorNetworkAgent::didFailLoading(ResourceLoaderIdentifier identifier,
     String requestId = IdentifiersFactory::requestId(identifier.toUInt64());
 
     if (loader && m_resourcesData->resourceType(requestId) == ResourceType::Document) {
+        if (m_stoppingLoadingDueToProcessSwap)
+            return;
+
         auto* frame = loader->frame();
         if (frame && frame->loader().documentLoader() && frame->document()) {
             m_resourcesData->addResourceSharedBuffer(requestId,
@@ -846,6 +852,7 @@ Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::disable()
     Ref { m_instrumentingAgents.get() }->setEnabledNetworkAgent(nullptr);
     m_resourcesData->clear();
     m_extraRequestHeaders.clear();
+    m_stoppingLoadingDueToProcessSwap = false;
 
     continuePendingRequests();
     continuePendingResponses();
@@ -904,6 +911,7 @@ void InspectorNetworkAgent::continuePendingResponses()
 
 Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::setExtraHTTPHeaders(Ref<JSON::Object>&& headers)
 {
+    m_extraRequestHeaders.clear();
     for (auto& entry : headers.get()) {
         auto stringValue = entry.value->asString();
         if (!!stringValue)
@@ -1158,6 +1166,11 @@ void InspectorNetworkAgent::interceptResponse(const ResourceResponse& response,
     m_frontendDispatcher->responseIntercepted(requestId, resourceResponse.releaseNonNull());
 }
 
+void InspectorNetworkAgent::setStoppingLoadingDueToProcessSwap(bool stopping)
+{
+    m_stoppingLoadingDueToProcessSwap = stopping;
+}
+
 Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::interceptContinue(const Inspector::Protocol::Network::RequestId& requestId, Inspector::Protocol::Network::NetworkStage networkStage)
 {
     switch (networkStage) {
@@ -1187,6 +1200,9 @@ Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::interceptWithReq
         return makeUnexpected("Missing pending intercept request for given requestId"_s);
 
     auto& loader = *pendingRequest->m_loader;
+    if (loader.reachedTerminalState())
+        return makeUnexpected("Unable to intercept request, it has already been processed"_s);
+
     ResourceRequest request = loader.request();
     if (!!url)
         request.setURL(URL({ }, url));
@@ -1282,13 +1298,22 @@ Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::interceptRequest
     response.setHTTPStatusCode(status);
     response.setHTTPStatusText(String { statusText });
     HTTPHeaderMap explicitHeaders;
+    String setCookieValue;
     for (auto& header : headers.get()) {
         auto headerValue = header.value->asString();
-        if (!!headerValue)
+        if (equalIgnoringASCIICase(header.key, "Set-Cookie"_s))
+            setCookieValue = headerValue;
+        else if (!!headerValue)
             explicitHeaders.add(header.key, headerValue);
+
     }
     response.setHTTPHeaderFields(WTF::move(explicitHeaders));
     response.setHTTPHeaderField(HTTPHeaderName::ContentType, response.mimeType());
+
+    auto* frame = loader->frame();
+    if (!setCookieValue.isEmpty() && frame && frame->page())
+        frame->page()->cookieJar().setCookieFromResponse(*loader.get(), setCookieValue);
+
     loader->didReceiveResponse(WTF::move(response), [loader, buffer = data.releaseNonNull()]() {
         if (loader->reachedTerminalState())
             return;
@@ -1352,6 +1377,12 @@ Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::setEmulatedCondi
 
 #endif // ENABLE(INSPECTOR_NETWORK_THROTTLING)
 
+Inspector::Protocol::ErrorStringOr<void> InspectorNetworkAgent::setEmulateOfflineState(bool offline)
+{
+    platformStrategies()->loaderStrategy()->setEmulateOfflineState(offline);
+    return { };
+}
+
 static Ref<Inspector::Protocol::Page::SearchResult> buildObjectForSearchResult(const Inspector::Protocol::Network::RequestId& requestId, const Inspector::Protocol::Network::FrameId& frameId, const String& url, int matchesCount)
 {
     auto searchResult = Inspector::Protocol::Page::SearchResult::create()
diff --git a/Source/WebCore/inspector/agents/InspectorNetworkAgent.h b/Source/WebCore/inspector/agents/InspectorNetworkAgent.h
index 5875ac43836d8cbd9b40e82ebf964a34eb65254f..175bd8649c496232fed546ccbb12102722d8608b 100644
--- a/Source/WebCore/inspector/agents/InspectorNetworkAgent.h
+++ b/Source/WebCore/inspector/agents/InspectorNetworkAgent.h
@@ -35,6 +35,8 @@
 #include "InspectorPageAgent.h"
 #include "InspectorWebAgentBase.h"
 #include "NetworkResourcesData.h"
+#include "ResourceError.h"
+#include "SharedBuffer.h"
 #include "WebSocket.h"
 #include <JavaScriptCore/ContentSearchUtilities.h>
 #include <JavaScriptCore/InspectorBackendDispatchers.h>
@@ -105,6 +107,7 @@ public:
 #if ENABLE(INSPECTOR_NETWORK_THROTTLING)
     Inspector::Protocol::ErrorStringOr<void> setEmulatedConditions(std::optional<int>&& bytesPerSecondLimit) final;
 #endif
+    Inspector::Protocol::ErrorStringOr<void> setEmulateOfflineState(bool offline) final;
 
     // InspectorInstrumentation
     void NODELETE willRecalculateStyle();
@@ -136,6 +139,7 @@ public:
     bool shouldInterceptResponse(const ResourceResponse&);
     void interceptResponse(const ResourceResponse&, ResourceLoaderIdentifier, CompletionHandler<void(const ResourceResponse&, RefPtr<FragmentedSharedBuffer>)>&&);
     void interceptRequest(ResourceLoader&, Function<void(const ResourceRequest&)>&&);
+    void setStoppingLoadingDueToProcessSwap(bool);
 
     void searchOtherRequests(const JSC::Yarr::RegularExpression&, Ref<JSON::ArrayOf<Inspector::Protocol::Page::SearchResult>>&);
     void searchInRequest(Inspector::Protocol::ErrorString&, const Inspector::Protocol::Network::RequestId&, const String& query, bool caseSensitive, bool isRegex, RefPtr<JSON::ArrayOf<Inspector::Protocol::GenericTypes::SearchMatch>>&);
@@ -192,6 +196,7 @@ private:
     bool m_loadingXHRSynchronously { false };
     bool m_interceptionEnabled { false };
     bool m_clearResourceDataOnNavigate { true };
+    bool m_stoppingLoadingDueToProcessSwap { false };
 };
 
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/agents/InspectorPageAgent.cpp b/Source/WebCore/inspector/agents/InspectorPageAgent.cpp
index 6bb8dd192ae2fedac06e2b35bb9c6711950d5b23..5fb689a1a62b8fd687b73c590236ac11d5e1fb03 100644
--- a/Source/WebCore/inspector/agents/InspectorPageAgent.cpp
+++ b/Source/WebCore/inspector/agents/InspectorPageAgent.cpp
@@ -32,6 +32,7 @@
 #include "config.h"
 #include "InspectorPageAgent.h"
 
+#include "BackForwardController.h"
 #include "CachedResource.h"
 #include "Cookie.h"
 #include "CookieJar.h"
@@ -39,14 +40,17 @@
 #include "DocumentLoader.h"
 #include "DocumentResourceLoader.h"
 #include "DocumentView.h"
+#include "Editor.h"
 #include "ElementInlines.h"
 #include "EventTargetInlines.h"
+#include "FocusController.h"
 #include "ForcedAccessibilityValue.h"
 #include "FrameInlines.h"
 #include "FrameLoadRequest.h"
 #include "FrameLoader.h"
 #include "FrameSnapshotting.h"
 #include "HTMLFrameOwnerElement.h"
+#include "HTMLInputElement.h"
 #include "HTMLNames.h"
 #include "ImageBuffer.h"
 #include "ImageUtilities.h"
@@ -57,30 +61,38 @@
 #include "InspectorOverlay.h"
 #include "InspectorResourceUtilities.h"
 #include "InstrumentingAgents.h"
+#include "JSDOMWindowCustom.h"
 #include "LocalFrame.h"
 #include "LocalFrameView.h"
 #include "MIMETypeRegistry.h"
 #include "MemoryCache.h"
 #include "Page.h"
 #include "PageInspectorController.h"
+#include "PlatformScreen.h"
 #include "RenderObjectInlines.h"
 #include "RenderTheme.h"
 #include "ScriptController.h"
 #include "ScriptSourceCode.h"
+#include "ScrollingCoordinator.h"
 #include "SecurityOrigin.h"
 #include "Settings.h"
 #include "ShouldPartitionCookie.h"
 #include "StyleScope.h"
 #include "Theme.h"
+#include "TypingCommand.h"
 #include <pal/text/TextEncoding.h>
 #include "UserGestureIndicator.h"
 #include <JavaScriptCore/ContentSearchUtilities.h>
 #include <JavaScriptCore/IdentifiersFactory.h>
+#include <JavaScriptCore/InjectedScriptManager.h>
 #include <JavaScriptCore/RegularExpression.h>
+#include <wtf/DateMath.h>
 #include <wtf/ListHashSet.h>
+#include <wtf/NeverDestroyed.h>
 #include <wtf/Stopwatch.h>
 #include <wtf/TZoneMallocInlines.h>
 #include <wtf/text/Base64.h>
+#include <wtf/text/MakeString.h>
 #include <wtf/text/StringBuilder.h>
 
 #if ENABLE(APPLICATION_MANIFEST)
@@ -102,6 +114,11 @@ using namespace Inspector;
 
 WTF_MAKE_TZONE_ALLOCATED_IMPL(InspectorPageAgent);
 
+static UncheckedKeyHashMap<String, Ref<DOMWrapperWorld>>& createdUserWorlds() {
+    static NeverDestroyed<UncheckedKeyHashMap<String, Ref<DOMWrapperWorld>>> nameToWorld;
+    return nameToWorld;
+}
+
 InspectorOverlay& InspectorPageAgent::overlay() const
 {
     return m_overlay.get();
@@ -112,6 +129,7 @@ InspectorPageAgent::InspectorPageAgent(PageAgentContext& context, InspectorBacke
     , m_frontendDispatcher(makeUniqueRef<Inspector::PageFrontendDispatcher>(context.frontendRouter))
     , m_backendDispatcher(Inspector::PageBackendDispatcher::create(context.backendDispatcher, this))
     , m_inspectedPage(context.inspectedPage)
+    , m_injectedScriptManager(context.injectedScriptManager)
     , m_client(client)
     , m_overlay(overlay)
 {
@@ -142,12 +160,20 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::enable()
 
     defaultUserPreferencesDidChange();
 
+    if (!createdUserWorlds().isEmpty()) {
+        Vector<DOMWrapperWorld*> worlds;
+        for (const auto& world : createdUserWorlds().values())
+            worlds.append(world.ptr());
+        ensureUserWorldsExistInAllFrames(worlds);
+    }
     return { };
 }
 
 Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::disable()
 {
     Ref { m_instrumentingAgents.get() }->setEnabledPageAgent(nullptr);
+    m_interceptFileChooserDialog = false;
+    m_bypassCSP = false;
 
     std::ignore = setShowPaintRects(false);
 #if !PLATFORM(IOS_FAMILY)
@@ -200,6 +226,22 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::reload(std::optiona
     return { };
 }
 
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::goBack()
+{
+    if (!m_inspectedPage->backForward().goBack())
+        return makeUnexpected("Failed to go back"_s);
+
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::goForward()
+{
+    if (!m_inspectedPage->backForward().goForward())
+        return makeUnexpected("Failed to go forward"_s);
+
+    return { };
+}
+
 Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideUserAgent(const String& value)
 {
     m_userAgentOverride = value;
@@ -207,6 +249,13 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideUserAgent(c
     return { };
 }
 
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overridePlatform(const String& value)
+{
+    m_platformOverride = value;
+
+    return { };
+}
+
 Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideSetting(Inspector::Protocol::Page::Setting setting, std::optional<bool>&& value)
 {
     auto& inspectedPageSettings = m_inspectedPage->settings();
@@ -220,6 +269,12 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideSetting(Ins
         inspectedPageSettings.setAuthorAndUserStylesEnabledInspectorOverride(value);
         return { };
 
+#if ENABLE(DEVICE_ORIENTATION)
+    case Inspector::Protocol::Page::Setting::DeviceOrientationEventEnabled:
+        inspectedPageSettings.setDeviceOrientationEventEnabled(value.value_or(false));
+        return { };
+#endif
+
     case Inspector::Protocol::Page::Setting::ICECandidateFilteringEnabled:
         inspectedPageSettings.setICECandidateFilteringEnabledInspectorOverride(value);
         return { };
@@ -246,6 +301,39 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideSetting(Ins
         m_client->setDeveloperPreferenceOverride(InspectorBackendClient::DeveloperPreference::NeedsSiteSpecificQuirks, value);
         return { };
 
+#if ENABLE(NOTIFICATIONS)
+    case Inspector::Protocol::Page::Setting::NotificationsEnabled:
+        inspectedPageSettings.setNotificationsEnabled(value.value_or(false));
+        return { };
+#endif
+
+#if ENABLE(FULLSCREEN_API)
+    case Inspector::Protocol::Page::Setting::FullScreenEnabled:
+        inspectedPageSettings.setFullScreenEnabled(value.value_or(false));
+        return { };
+#endif
+
+    case Inspector::Protocol::Page::Setting::InputTypeMonthEnabled:
+        inspectedPageSettings.setInputTypeMonthEnabled(value.value_or(false));
+        return { };
+
+    case Inspector::Protocol::Page::Setting::InputTypeWeekEnabled:
+        inspectedPageSettings.setInputTypeWeekEnabled(value.value_or(false));
+        return { };
+
+    case Inspector::Protocol::Page::Setting::FixedBackgroundsPaintRelativeToDocument:
+        // Enable this setting similar to iOS to ensure scrolling works with
+        // `background-attachment: fixed`.
+        // See https://github.com/microsoft/playwright/issues/31551.
+        inspectedPageSettings.setFixedBackgroundsPaintRelativeToDocument(value.value_or(false));
+        return { };
+
+#if ENABLE(POINTER_LOCK)
+    case Inspector::Protocol::Page::Setting::PointerLockEnabled:
+        inspectedPageSettings.setPointerLockEnabled(value.value_or(false));
+        return { };
+#endif
+
     case Inspector::Protocol::Page::Setting::ScriptEnabled:
         inspectedPageSettings.setScriptEnabledInspectorOverride(value);
         return { };
@@ -258,6 +346,12 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::overrideSetting(Ins
         inspectedPageSettings.setShowRepaintCounterInspectorOverride(value);
         return { };
 
+#if ENABLE(MEDIA_STREAM)
+    case Inspector::Protocol::Page::Setting::SpeechRecognitionEnabled:
+        inspectedPageSettings.setSpeechRecognitionEnabled(value.value_or(false));
+        return { };
+#endif
+
     case Inspector::Protocol::Page::Setting::WebSecurityEnabled:
         inspectedPageSettings.setWebSecurityEnabledInspectorOverride(value);
         return { };
@@ -670,15 +764,16 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setShowPaintRects(b
     return { };
 }
 
-void InspectorPageAgent::domContentEventFired()
+void InspectorPageAgent::domContentEventFired(LocalFrame& frame)
 {
-    m_isFirstLayoutAfterOnLoad = true;
-    m_frontendDispatcher->domContentEventFired(timestamp());
+    if (frame.isMainFrame())
+        m_isFirstLayoutAfterOnLoad = true;
+    m_frontendDispatcher->domContentEventFired(timestamp(), frameId(&frame));
 }
 
-void InspectorPageAgent::loadEventFired()
+void InspectorPageAgent::loadEventFired(LocalFrame& frame)
 {
-    m_frontendDispatcher->loadEventFired(timestamp());
+    m_frontendDispatcher->loadEventFired(timestamp(), frameId(&frame));
 }
 
 void InspectorPageAgent::frameNavigated(LocalFrame& frame)
@@ -686,6 +781,22 @@ void InspectorPageAgent::frameNavigated(LocalFrame& frame)
     m_frontendDispatcher->frameNavigated(buildObjectForFrame(&frame));
 }
 
+String InspectorPageAgent::serializeFrameID(FrameIdentifier frameID)
+{
+    return makeString(frameID.toUInt64());
+}
+
+std::optional<FrameIdentifier> InspectorPageAgent::parseFrameID(String frameID)
+{
+    if (!frameID.containsOnlyASCII())
+        return std::nullopt;
+
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
+    uint64_t frameIDNumber = strtoull(frameID.ascii().data(), 0, 10);
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
+    return WebCore::FrameIdentifier(frameIDNumber);
+}
+
 void InspectorPageAgent::frameDetached(LocalFrame& frame)
 {
     auto identifier = m_inspectedPage->inspectorController().identifierRegistry().takeFrame(frame);
@@ -758,6 +869,12 @@ void InspectorPageAgent::defaultUserPreferencesDidChange()
     m_frontendDispatcher->defaultUserPreferencesDidChange(WTF::move(defaultUserPreferences));
 }
 
+void InspectorPageAgent::didNavigateWithinPage(LocalFrame& frame)
+{
+    String url = frame.document()->url().string();
+    m_frontendDispatcher->navigatedWithinDocument(frameId(&frame), url);
+}
+
 #if ENABLE(DARK_MODE_CSS)
 void InspectorPageAgent::defaultAppearanceDidChange()
 {
@@ -771,6 +888,9 @@ void InspectorPageAgent::didClearWindowObjectInWorld(LocalFrame& frame, DOMWrapp
         return;
 
     if (m_bootstrapScript.isEmpty())
+       return;
+
+    if (m_ignoreDidClearWindowObject)
         return;
 
     frame.script().evaluateIgnoringException(ScriptSourceCode(m_bootstrapScript, JSC::SourceTaintedOrigin::Untainted, URL { "web-inspector://bootstrap.js"_str }));
@@ -818,6 +938,51 @@ void InspectorPageAgent::didRecalculateStyle()
     protect(overlay())->update();
 }
 
+void InspectorPageAgent::runOpenPanel(HTMLInputElement* element, bool* intercept)
+{
+    if (m_interceptFileChooserDialog) {
+        *intercept = true;
+    } else {
+        return;
+    }
+    Document& document = element->document();
+    auto* frame =  document.frame();
+    if (!frame)
+        return;
+
+    auto& globalObject = mainWorldGlobalObject(*frame);
+    auto injectedScript = m_injectedScriptManager.injectedScriptFor(&globalObject);
+    if (injectedScript.hasNoValue())
+        return;
+
+    auto object = injectedScript.wrapObject(InspectorDOMAgent::nodeAsScriptValue(globalObject, element), WTF::String());
+    if (!object)
+        return;
+
+    m_frontendDispatcher->fileChooserOpened(frameId(frame), object.releaseNonNull());
+}
+
+void InspectorPageAgent::frameAttached(LocalFrame& frame)
+{
+    String parentFrameId = frameId(dynamicDowncast<LocalFrame>(frame.tree().parent()));
+    m_frontendDispatcher->frameAttached(frameId(&frame), parentFrameId);
+}
+
+bool InspectorPageAgent::shouldBypassCSP()
+{
+    return m_bypassCSP;
+}
+
+void InspectorPageAgent::willCheckNavigationPolicy(LocalFrame& frame)
+{
+    m_frontendDispatcher->willCheckNavigationPolicy(frameId(&frame));
+}
+
+void InspectorPageAgent::didCheckNavigationPolicy(LocalFrame& frame, bool cancel)
+{
+    m_frontendDispatcher->didCheckNavigationPolicy(frameId(&frame), cancel);
+}
+
 Ref<Inspector::Protocol::Page::Frame> InspectorPageAgent::buildObjectForFrame(LocalFrame* frame)
 {
     ASSERT_ARG(frame, frame);
@@ -911,6 +1076,12 @@ void InspectorPageAgent::applyUserAgentOverride(String& userAgent)
         userAgent = m_userAgentOverride;
 }
 
+void InspectorPageAgent::applyPlatformOverride(String& platform)
+{
+    if (!m_platformOverride.isEmpty())
+        platform = m_platformOverride;
+}
+
 void InspectorPageAgent::applyEmulatedMedia(AtomString& media)
 {
     if (!m_emulatedMedia.isEmpty())
@@ -926,7 +1097,7 @@ Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::snapshotNode(Insp
     RefPtr node = domAgent->assertNode(errorString, nodeId);
     if (!node)
         return makeUnexpected(errorString);
-    
+
     RefPtr localMainFrame = m_inspectedPage->localMainFrame();
     if (!localMainFrame)
         return makeUnexpected("Main frame isn't local"_s);
@@ -937,11 +1108,13 @@ Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::snapshotNode(Insp
     return encodeDataURL(WTF::move(snapshot), "image/png"_s);
 }
 
-Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::snapshotRect(int x, int y, int width, int height, Inspector::Protocol::Page::CoordinateSystem coordinateSystem)
+Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::snapshotRect(int x, int y, int width, int height, Inspector::Protocol::Page::CoordinateSystem coordinateSystem, std::optional<bool>&& omitDeviceScaleFactor)
 {
     SnapshotOptions options { { }, PixelFormat::BGRA8, DestinationColorSpace::SRGB() };
     if (coordinateSystem == Inspector::Protocol::Page::CoordinateSystem::Viewport)
         options.flags.add(SnapshotFlags::InViewCoordinates);
+    if (omitDeviceScaleFactor.has_value() && *omitDeviceScaleFactor)
+        options.flags.add(SnapshotFlags::OmitDeviceScaleFactor);
 
     IntRect rectangle(x, y, width, height);
     RefPtr localMainFrame = m_inspectedPage->localMainFrame();
@@ -954,6 +1127,43 @@ Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::snapshotRect(int
     return encodeDataURL(WTF::move(snapshot), "image/png"_s);
 }
 
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setForcedColors(std::optional<Inspector::Protocol::Page::ForcedColors>&& forcedColors)
+{
+    if (!forcedColors) {
+        m_inspectedPage->setUseForcedColorsOverride(std::nullopt);
+        return { };
+    }
+
+    switch (*forcedColors) {
+        case Inspector::Protocol::Page::ForcedColors::Active:
+            m_inspectedPage->setUseForcedColorsOverride(true);
+            return { };
+        case Inspector::Protocol::Page::ForcedColors::None:
+            m_inspectedPage->setUseForcedColorsOverride(false);
+            return { };
+    }
+
+    ASSERT_NOT_REACHED();
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setTimeZone(const String& timeZone)
+{
+    bool success = WTF::setTimeZoneOverride(timeZone);
+    if (!success)
+        return makeUnexpected(makeString("Invalid time zone "_s, timeZone));
+
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setTouchEmulationEnabled(bool enabled)
+{
+  setScreenHasTouchDeviceOverride(enabled);
+  m_inspectedPage->settings().setTouchEventDOMAttributesEnabled(enabled);
+  return { };
+}
+
+
 #if ENABLE(WEB_ARCHIVE) && USE(CF)
 Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::archive()
 {
@@ -970,7 +1180,6 @@ Inspector::Protocol::ErrorStringOr<String> InspectorPageAgent::archive()
 }
 #endif
 
-#if !PLATFORM(COCOA)
 Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setScreenSizeOverride(std::optional<int>&& width, std::optional<int>&& height)
 {
     if (width.has_value() != height.has_value())
@@ -988,6 +1197,86 @@ Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setScreenSizeOverri
     localMainFrame->setOverrideScreenSize(FloatSize(width.value_or(0), height.value_or(0)));
     return { };
 }
-#endif
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::insertText(const String& text)
+{
+    UserGestureIndicator indicator { IsProcessingUserGesture::Yes };
+    RefPtr frame = m_inspectedPage->focusController().focusedOrMainFrame();
+    if (!frame)
+        return { };
+
+    if (frame->editor().hasComposition()) {
+        frame->editor().confirmComposition(text);
+    } else {
+        Document* focusedDocument = frame->document();
+        TypingCommand::insertText(*focusedDocument, text, nullptr, { });
+    }
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setInterceptFileChooserDialog(bool enabled)
+{
+    m_interceptFileChooserDialog = enabled;
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setDefaultBackgroundColorOverride(RefPtr<JSON::Object>&& color)
+{
+    auto* localFrame = dynamicDowncast<LocalFrame>(m_inspectedPage->mainFrame());
+    LocalFrameView* view = localFrame ? localFrame->view() : nullptr;
+    if (!view)
+        return makeUnexpected("Internal error: No frame view to set color two"_s);
+
+    if (!color) {
+        view->updateBackgroundRecursively(std::optional<Color>());
+        return { };
+    }
+
+    view->updateBackgroundRecursively(InspectorDOMAgent::parseColor(WTF::move(color)));
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::createUserWorld(const String& name)
+{
+    if (createdUserWorlds().contains(name))
+        return makeUnexpected("World with the given name already exists"_s);
+
+    Ref<DOMWrapperWorld> world = ScriptController::createWorld(name, ScriptController::WorldType::User);
+    ensureUserWorldsExistInAllFrames({world.ptr()});
+    createdUserWorlds().set(name, WTF::move(world));
+    return { };
+}
+
+void InspectorPageAgent::ensureUserWorldsExistInAllFrames(const Vector<DOMWrapperWorld*>& worlds)
+{
+    for (Frame* frame = &m_inspectedPage->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+        auto* localFrame = dynamicDowncast<LocalFrame>(frame);
+        if (!localFrame)
+            continue;
+        for (auto* world : worlds)
+            localFrame->windowProxy().jsWindowProxy(*world)->window();
+    }
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::setBypassCSP(bool enabled)
+{
+    m_bypassCSP = enabled;
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::crash()
+{
+    WTFCrash();
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPageAgent::updateScrollingState()
+{
+    auto* scrollingCoordinator = m_inspectedPage->scrollingCoordinator();
+    if (!scrollingCoordinator)
+        return {};
+    scrollingCoordinator->commitTreeStateIfNeeded();
+    return {};
+}
 
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/agents/InspectorPageAgent.h b/Source/WebCore/inspector/agents/InspectorPageAgent.h
index 97c3cf09961f5c5ea7ede70d35755639fc66a3df..d5aabfbb3062f6037415bb3e136d3d7cebdfbbfd 100644
--- a/Source/WebCore/inspector/agents/InspectorPageAgent.h
+++ b/Source/WebCore/inspector/agents/InspectorPageAgent.h
@@ -43,10 +43,12 @@
 #include <wtf/Seconds.h>
 #include <wtf/TZoneMalloc.h>
 #include <wtf/WeakRef.h>
+#include <wtf/Vector.h>
 #include <wtf/text/WTFString.h>
 
 namespace Inspector {
 enum class ResourceType;
+class InjectedScriptManager;
 }
 
 namespace WebCore {
@@ -54,6 +56,7 @@ namespace WebCore {
 class DOMWrapperWorld;
 class DocumentLoader;
 class Frame;
+class HTMLInputElement;
 class InspectorOverlay;
 class LocalFrame;
 class Page;
@@ -68,6 +71,9 @@ public:
     InspectorPageAgent(PageAgentContext&, InspectorBackendClient*, InspectorOverlay&);
     ~InspectorPageAgent();
 
+    WEBCORE_EXPORT static String serializeFrameID(FrameIdentifier frameID);
+    WEBCORE_EXPORT static std::optional<FrameIdentifier> parseFrameID(String frameID);
+
     // InspectorAgentBase
     void didCreateFrontendAndBackend();
     void willDestroyFrontendAndBackend(Inspector::DisconnectReason);
@@ -76,7 +82,10 @@ public:
     Inspector::Protocol::ErrorStringOr<void> enable();
     Inspector::Protocol::ErrorStringOr<void> disable();
     Inspector::Protocol::ErrorStringOr<void> reload(std::optional<bool>&& ignoreCache, std::optional<bool>&& revalidateAllResources);
+    Inspector::Protocol::ErrorStringOr<void> goBack();
+    Inspector::Protocol::ErrorStringOr<void> goForward();
     Inspector::Protocol::ErrorStringOr<void> overrideUserAgent(const String&);
+    Inspector::Protocol::ErrorStringOr<void> overridePlatform(const String&);
     Inspector::Protocol::ErrorStringOr<void> overrideSetting(Inspector::Protocol::Page::Setting, std::optional<bool>&& value);
     Inspector::Protocol::ErrorStringOr<void> overrideUserPreference(Inspector::Protocol::Page::UserPreferenceName, std::optional<Inspector::Protocol::Page::UserPreferenceValue>&&);
     Inspector::Protocol::ErrorStringOr<Ref<JSON::ArrayOf<Inspector::Protocol::Page::Cookie>>> getCookies();
@@ -92,41 +101,60 @@ public:
 #endif
     Inspector::Protocol::ErrorStringOr<void> setShowPaintRects(bool);
     Inspector::Protocol::ErrorStringOr<void> setEmulatedMedia(const String&);
+    Inspector::Protocol::ErrorStringOr<void> setForcedColors(std::optional<Inspector::Protocol::Page::ForcedColors>&&);
+    Inspector::Protocol::ErrorStringOr<void> setTimeZone(const String&);
+    Inspector::Protocol::ErrorStringOr<void> setTouchEmulationEnabled(bool);
     Inspector::Protocol::ErrorStringOr<String> snapshotNode(Inspector::Protocol::DOM::NodeId);
-    Inspector::Protocol::ErrorStringOr<String> snapshotRect(int x, int y, int width, int height, Inspector::Protocol::Page::CoordinateSystem);
+    Inspector::Protocol::ErrorStringOr<String> snapshotRect(int x, int y, int width, int height, Inspector::Protocol::Page::CoordinateSystem, std::optional<bool>&& omitDeviceScaleFactor);
 #if ENABLE(WEB_ARCHIVE) && USE(CF)
     Inspector::Protocol::ErrorStringOr<String> archive();
 #endif
-#if !PLATFORM(COCOA)
     Inspector::Protocol::ErrorStringOr<void> setScreenSizeOverride(std::optional<int>&& width, std::optional<int>&& height);
-#endif
+
+    Inspector::Protocol::ErrorStringOr<void> insertText(const String& text);
+    Inspector::Protocol::ErrorStringOr<void> setInterceptFileChooserDialog(bool enabled);
+    Inspector::Protocol::ErrorStringOr<void> setDefaultBackgroundColorOverride(RefPtr<JSON::Object>&&);
+    Inspector::Protocol::ErrorStringOr<void> createUserWorld(const String&);
+    Inspector::Protocol::ErrorStringOr<void> setBypassCSP(bool);
+    Inspector::Protocol::ErrorStringOr<void> crash();
+    Inspector::Protocol::ErrorStringOr<void> updateScrollingState();
 
     // InspectorInstrumentation
-    void domContentEventFired();
-    void loadEventFired();
+    void domContentEventFired(LocalFrame&);
+    void loadEventFired(LocalFrame&);
     void frameNavigated(LocalFrame&);
     void frameDetached(LocalFrame&);
     void loaderDetachedFromFrame(DocumentLoader&);
     void accessibilitySettingsDidChange();
     void defaultUserPreferencesDidChange();
+    void didNavigateWithinPage(LocalFrame&);
 #if ENABLE(DARK_MODE_CSS)
     void defaultAppearanceDidChange();
 #endif
     void applyUserAgentOverride(String&);
+    void applyPlatformOverride(String&);
     void applyEmulatedMedia(AtomString&);
     void didClearWindowObjectInWorld(LocalFrame&, DOMWrapperWorld&);
     void didPaint(RenderObject&, const LayoutRect&);
     void didLayout();
     void didScroll();
     void didRecalculateStyle();
+    void runOpenPanel(HTMLInputElement* element, bool* intercept);
+    void frameAttached(LocalFrame&);
+    bool shouldBypassCSP();
+    void willCheckNavigationPolicy(LocalFrame&);
+    void didCheckNavigationPolicy(LocalFrame&, bool cancel);
 
     Frame* frameForId(const Inspector::Protocol::Network::FrameId&);
     WEBCORE_EXPORT String frameId(Frame*);
     String loaderId(DocumentLoader*);
     LocalFrame* assertFrame(Inspector::Protocol::ErrorString&, const Inspector::Protocol::Network::FrameId&);
+    void setIgnoreDidClearWindowObject(bool ignore) { m_ignoreDidClearWindowObject = ignore; }
+    bool ignoreDidClearWindowObject() const { return m_ignoreDidClearWindowObject; }
 
 private:
     double timestamp();
+    void ensureUserWorldsExistInAllFrames(const Vector<DOMWrapperWorld*>&);
 
     InspectorOverlay& NODELETE overlay() const;
 
@@ -141,14 +169,19 @@ private:
     const Ref<Inspector::PageBackendDispatcher> m_backendDispatcher;
 
     WeakRef<Page> m_inspectedPage;
+    Inspector::InjectedScriptManager& m_injectedScriptManager;
     InspectorBackendClient* m_client { nullptr };
     WeakRef<InspectorOverlay> m_overlay;
 
     String m_userAgentOverride;
+    String m_platformOverride;
     AtomString m_emulatedMedia;
     String m_bootstrapScript;
     bool m_isFirstLayoutAfterOnLoad { false };
     bool m_showPaintRects { false };
+    bool m_interceptFileChooserDialog { false };
+    bool m_bypassCSP { false };
+    bool m_ignoreDidClearWindowObject { false };
 };
 
 } // namespace WebCore
diff --git a/Source/WebCore/inspector/agents/page/PageRuntimeAgent.cpp b/Source/WebCore/inspector/agents/page/PageRuntimeAgent.cpp
index e93e93df33a77cf1995340ff1375488efee0a9df..002c160eec98597f97d547f6f2722b7edb58be72 100644
--- a/Source/WebCore/inspector/agents/page/PageRuntimeAgent.cpp
+++ b/Source/WebCore/inspector/agents/page/PageRuntimeAgent.cpp
@@ -35,7 +35,9 @@
 #include "DOMWrapperWorld.h"
 #include "Document.h"
 #include "FrameConsoleClient.h"
+#include "FrameLoader.h"
 #include "InspectorIdentifierRegistry.h"
+#include "InspectorPageAgent.h"
 #include "InstrumentingAgents.h"
 #include "JSDOMWindowCustom.h"
 #include "JSExecState.h"
@@ -43,6 +45,7 @@
 #include "Page.h"
 #include "PageInspectorController.h"
 #include "ScriptController.h"
+#include "ScriptSourceCode.h"
 #include "SecurityOrigin.h"
 #include "UserGestureEmulationScope.h"
 #include <JavaScriptCore/InjectedScript.h>
@@ -90,13 +93,74 @@ Inspector::Protocol::ErrorStringOr<void> PageRuntimeAgent::disable()
 {
     Ref { m_instrumentingAgents.get() }->setEnabledPageRuntimeAgent(nullptr);
 
+    m_bindingNames.clear();
+
     return InspectorRuntimeAgent::disable();
 }
 
 void PageRuntimeAgent::frameNavigated(LocalFrame& frame)
 {
+    auto* pageAgent = Ref { m_instrumentingAgents.get() }->enabledPageAgent();
+    if (pageAgent)
+        pageAgent->setIgnoreDidClearWindowObject(true);
     // Ensure execution context is created for the frame even if it doesn't have scripts.
     mainWorldGlobalObject(frame);
+    if (pageAgent)
+        pageAgent->setIgnoreDidClearWindowObject(false);
+}
+
+static JSC_DECLARE_HOST_FUNCTION(bindingCallback);
+
+JSC_DEFINE_HOST_FUNCTION(bindingCallback, (JSC::JSGlobalObject * globalObject, JSC::CallFrame* callFrame))
+{
+    auto result = JSC::JSValue::encode(JSC::jsUndefined());
+    if (!callFrame->jsCallee())
+        return result;
+    String bindingName;
+    if (auto* function = dynamicDowncast<JSC::JSFunction>(callFrame->jsCallee()))
+        bindingName = function->name(globalObject->vm());
+    auto client = globalObject->consoleClient();
+    if (!client)
+        return result;
+    if (callFrame->argumentCount() < 1)
+        return result;
+    auto value = callFrame->argument(0);
+    if (value.isUndefined())
+        return result;
+    String stringArg = value.toWTFString(globalObject);
+    client->bindingCalled(globalObject, bindingName, stringArg);
+    return result;
+}
+
+static void addBindingToFrame(LocalFrame& frame, const String& name)
+{
+    JSC::JSGlobalObject* globalObject = frame.script().globalObject(mainThreadNormalWorldSingleton());
+    auto& vm = globalObject->vm();
+    JSC::JSLockHolder lock(vm);
+    globalObject->putDirectNativeFunction(vm, globalObject, JSC::Identifier::fromString(vm, name), 1, bindingCallback, JSC::ImplementationVisibility::Public, JSC::NoIntrinsic, JSC::attributesForStructure(static_cast<unsigned>(JSC::PropertyAttribute::Function)));
+}
+
+Inspector::Protocol::ErrorStringOr<void> PageRuntimeAgent::addBinding(const String& name)
+{
+    if (!m_bindingNames.add(name).isNewEntry)
+        return {};
+
+    m_inspectedPage->forEachLocalFrame([&](LocalFrame& frame) {
+        if (!frame.script().canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
+            return;
+
+        addBindingToFrame(frame, name);
+    });
+
+    return {};
+}
+
+void PageRuntimeAgent::bindingCalled(JSC::JSGlobalObject* globalObject, const String& name, const String& arg)
+{
+    auto injectedScript = injectedScriptManager().injectedScriptFor(globalObject);
+    if (injectedScript.hasNoValue())
+        return;
+    m_frontendDispatcher->bindingCalled(injectedScriptManager().injectedScriptIdFor(globalObject), name, arg);
 }
 
 void PageRuntimeAgent::didClearWindowObjectInWorld(LocalFrame& frame, DOMWrapperWorld& world)
@@ -105,7 +169,29 @@ void PageRuntimeAgent::didClearWindowObjectInWorld(LocalFrame& frame, DOMWrapper
     if (frameId.isEmpty())
         return;
 
+    auto* pageAgent = Ref { m_instrumentingAgents.get() }->enabledPageAgent();
+    if (pageAgent && pageAgent->ignoreDidClearWindowObject())
+        return;
+
+    if (world.isNormal()) {
+        for (const auto& name : m_bindingNames)
+            addBindingToFrame(frame, name);
+    }
+
+    if (pageAgent)
+        pageAgent->setIgnoreDidClearWindowObject(true);
     notifyContextCreated(frameId, frame.script().globalObject(world), world);
+    if (pageAgent)
+        pageAgent->setIgnoreDidClearWindowObject(false);
+}
+
+void PageRuntimeAgent::didReceiveMainResourceError(LocalFrame& frame)
+{
+    if (frame.loader().stateMachine().isDisplayingInitialEmptyDocument()) {
+        // Ensure execution context is created for the empty docment to make
+        // it usable in case loading failed.
+        mainWorldGlobalObject(frame);
+    }
 }
 
 InjectedScript PageRuntimeAgent::injectedScriptForEval(Inspector::Protocol::ErrorString& errorString, std::optional<Inspector::Protocol::Runtime::ExecutionContextId>&& executionContextId)
@@ -142,9 +228,6 @@ void PageRuntimeAgent::reportExecutionContextCreation()
     Ref identifierRegistry = m_inspectedPage->inspectorController().identifierRegistry();
 
     m_inspectedPage->forEachLocalFrame([&](LocalFrame& frame) {
-        if (!frame.script().canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
-            return;
-
         auto frameId = identifierRegistry->frameId(&frame);
 
         // Always send the main world first.
diff --git a/Source/WebCore/inspector/agents/page/PageRuntimeAgent.h b/Source/WebCore/inspector/agents/page/PageRuntimeAgent.h
index db4e1b7cd5ba1c46f962c07fa6e23cb13092832c..f7fb1503fc42b4b5fd21f76a893c84030e8af8c2 100644
--- a/Source/WebCore/inspector/agents/page/PageRuntimeAgent.h
+++ b/Source/WebCore/inspector/agents/page/PageRuntimeAgent.h
@@ -39,6 +39,7 @@
 
 namespace JSC {
 class CallFrame;
+class JSGlobalObject;
 }
 
 namespace WebCore {
@@ -60,10 +61,13 @@ public:
     Inspector::Protocol::ErrorStringOr<void> disable();
     Inspector::Protocol::ErrorStringOr<std::tuple<Ref<Inspector::Protocol::Runtime::RemoteObject>, std::optional<bool> /* wasThrown */, std::optional<int> /* savedResultIndex */>> evaluate(const String& expression, const String& objectGroup, std::optional<bool>&& includeCommandLineAPI, std::optional<bool>&& doNotPauseOnExceptionsAndMuteConsole, std::optional<Inspector::Protocol::Runtime::ExecutionContextId>&&, std::optional<bool>&& returnByValue, std::optional<bool>&& generatePreview, std::optional<bool>&& saveResult, std::optional<bool>&& emulateUserGesture);
     void callFunctionOn(const Inspector::Protocol::Runtime::RemoteObjectId&, const String& functionDeclaration, RefPtr<JSON::Array>&& arguments, std::optional<bool>&& doNotPauseOnExceptionsAndMuteConsole, std::optional<bool>&& returnByValue, std::optional<bool>&& generatePreview, std::optional<bool>&& emulateUserGesture, std::optional<bool>&& awaitPromise, Ref<CallFunctionOnCallback>&&);
+    Inspector::Protocol::ErrorStringOr<void> addBinding(const String& name);
 
     // InspectorInstrumentation
     void frameNavigated(LocalFrame&);
     void didClearWindowObjectInWorld(LocalFrame&, DOMWrapperWorld&);
+    void didReceiveMainResourceError(LocalFrame&);
+    void bindingCalled(JSC::JSGlobalObject* globalObject, const String& name, const String& arg);
 
 private:
     Inspector::InjectedScript injectedScriptForEval(Inspector::Protocol::ErrorString&, std::optional<Inspector::Protocol::Runtime::ExecutionContextId>&&);
@@ -78,6 +82,7 @@ private:
     WeakRef<InstrumentingAgents> m_instrumentingAgents;
 
     WeakRef<Page> m_inspectedPage;
+    HashSet<String> m_bindingNames;
 };
 
 } // namespace WebCore
diff --git a/Source/WebCore/loader/CookieJar.h b/Source/WebCore/loader/CookieJar.h
index c2f9d5d90ff590154ef39132453194c162be0cc5..ff36e34f9e5963f1deaa41341174a7fd312ae25f 100644
--- a/Source/WebCore/loader/CookieJar.h
+++ b/Source/WebCore/loader/CookieJar.h
@@ -48,6 +48,7 @@ class NetworkStorageSession;
 class StorageSessionProvider;
 struct SameSiteInfo;
 enum class ShouldPartitionCookie : bool;
+class ResourceLoader;
 
 class WEBCORE_EXPORT CookieJar : public RefCountedAndCanMakeWeakPtr<CookieJar> {
 public:
@@ -82,6 +83,9 @@ public:
     virtual void clearCache() { }
     virtual void clearCacheForHost(const String&) { }
 
+    // Playwright.
+    virtual void setCookieFromResponse(ResourceLoader&, const String&) { }
+
     virtual ~CookieJar();
 protected:
     static SameSiteInfo sameSiteInfo(const Document&, IsForDOMCookieAccess = IsForDOMCookieAccess::No);
diff --git a/Source/WebCore/loader/DocumentLoader.cpp b/Source/WebCore/loader/DocumentLoader.cpp
index a060ef80b1c658b388324d5c3f724097fb5c3787..70a1c51d4e2b6e396afd5e5dbf9ad00cf88d42e8 100644
--- a/Source/WebCore/loader/DocumentLoader.cpp
+++ b/Source/WebCore/loader/DocumentLoader.cpp
@@ -787,8 +787,10 @@ void DocumentLoader::willSendRequest(ResourceRequest&& newRequest, const Resourc
     if (!didReceiveRedirectResponse)
         return completionHandler(WTF::move(newRequest));
 
+    InspectorInstrumentation::willCheckNavigationPolicy(*frame);
     auto navigationPolicyCompletionHandler = [this, protectedThis = Ref { *this }, frame, completionHandler = WTF::move(completionHandler)] (ResourceRequest&& request, WeakPtr<FormSubmission>&&, NavigationPolicyDecision navigationPolicyDecision) mutable {
         m_waitingForNavigationPolicy = false;
+        InspectorInstrumentation::didCheckNavigationPolicy(*frame, navigationPolicyDecision != NavigationPolicyDecision::ContinueLoad);
         switch (navigationPolicyDecision) {
         case NavigationPolicyDecision::IgnoreLoad:
         case NavigationPolicyDecision::LoadWillContinueInAnotherProcess:
@@ -1590,11 +1592,17 @@ void DocumentLoader::detachFromFrame(LoadWillContinueInAnotherProcess loadWillCo
     if (auto navigationID = std::exchange(m_navigationID, { }))
         frame->loader().client().documentLoaderDetached(*navigationID, loadWillContinueInAnotherProcess);
 
-    InspectorInstrumentation::loaderDetachedFromFrame(*frame, *this);
-
     observeFrame(nullptr);
 }
 
+void DocumentLoader::replacedByFragmentNavigation(LocalFrame& frame)
+{
+    ASSERT(!this->frame());
+    // Notify WebPageProxy that the navigation has been converted into same page navigation.
+    if (auto navigationID = std::exchange(m_navigationID, { }))
+        frame.loader().client().documentLoaderDetached(*navigationID, LoadWillContinueInAnotherProcess::No);
+}
+
 void DocumentLoader::setNavigationID(NavigationIdentifier navigationID)
 {
     m_navigationID = navigationID;
diff --git a/Source/WebCore/loader/DocumentLoader.h b/Source/WebCore/loader/DocumentLoader.h
index ffebadc8882ffd9a519fdaec8d42ac2909c5fe65..145e7ee21440d14da048d59f7c177c8d334e0ee3 100644
--- a/Source/WebCore/loader/DocumentLoader.h
+++ b/Source/WebCore/loader/DocumentLoader.h
@@ -209,6 +209,8 @@ public:
 
     WEBCORE_EXPORT virtual void detachFromFrame(LoadWillContinueInAnotherProcess);
 
+    void replacedByFragmentNavigation(LocalFrame&);
+
     WEBCORE_EXPORT FrameLoader* NODELETE frameLoader() const;
     WEBCORE_EXPORT SubresourceLoader* NODELETE mainResourceLoader() const;
     WEBCORE_EXPORT RefPtr<FragmentedSharedBuffer> mainResourceData() const;
diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
index 994f22fa6190e271f9f9927caa6a331c355cc43e..3f469ef6abebeea6f7df6b9406c8c0e9cd5fe386 100644
--- a/Source/WebCore/loader/FrameLoader.cpp
+++ b/Source/WebCore/loader/FrameLoader.cpp
@@ -1385,6 +1385,7 @@ void FrameLoader::loadInSameDocument(URL url, RefPtr<SerializedScriptValue> stat
     }
 
     m_client->dispatchDidNavigateWithinPage();
+    InspectorInstrumentation::didNavigateWithinPage(m_frame);
 
     document->statePopped(stateObject ? stateObject.releaseNonNull() : SerializedScriptValue::nullValue());
     m_client->dispatchDidPopStateWithinPage();
@@ -1938,6 +1939,7 @@ void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType t
     const String& httpMethod = loader->request().httpMethod();
 
     if (shouldPerformFragmentNavigation(isFormSubmission, httpMethod, policyChecker().loadType(), newURL) && !loader->substituteData().isValid()) {
+        loader->replacedByFragmentNavigation(m_frame);
 
         RefPtr oldDocumentLoader = m_documentLoader;
         NavigationAction action { protect(frame->document()).releaseNonNull(), loader->request(), InitiatedByMainFrame::Unknown, loader->isRequestFromClientOrUserInput(), policyChecker().loadType(), isFormSubmission };
@@ -1977,7 +1979,9 @@ void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType t
 
     auto policyDecisionMode = loader->triggeringAction().isFromNavigationAPI() ? PolicyDecisionMode::Synchronous : PolicyDecisionMode::Asynchronous;
     RELEASE_ASSERT(!isBackForwardLoadType(policyChecker().loadType()) || history().provisionalItem());
+    InspectorInstrumentation::willCheckNavigationPolicy(m_frame);
     policyChecker().checkNavigationPolicy(ResourceRequest(loader->request()), ResourceResponse { } /* redirectResponse */, loader, WTF::move(formSubmission), [this, protectedThis = Ref { *this }, allowNavigationToInvalidURL, completionHandler = completionHandlerCaller.release()] (const ResourceRequest& request, WeakPtr<const FormSubmission>&& weakFormSubmission, NavigationPolicyDecision navigationPolicyDecision) mutable {
+        InspectorInstrumentation::didCheckNavigationPolicy(m_frame, navigationPolicyDecision != NavigationPolicyDecision::ContinueLoad);
         continueLoadAfterNavigationPolicy(request, RefPtr { weakFormSubmission.get() }.get(), navigationPolicyDecision, allowNavigationToInvalidURL);
         completionHandler();
     }, policyDecisionMode, determineNavigationType(type, NavigationHistoryBehavior::Auto));
@@ -3324,10 +3328,15 @@ String FrameLoader::userAgent(const URL& url) const
 
 String FrameLoader::navigatorPlatform() const
 {
+    String platform;
+
     auto customNavigatorPlatform = protect(m_frame->mainFrame())->customNavigatorPlatform();
     if (!customNavigatorPlatform.isEmpty())
-        return customNavigatorPlatform;
-    return String();
+        platform = customNavigatorPlatform;
+
+    InspectorInstrumentation::applyPlatformOverride(m_frame, platform);
+
+    return platform;
 }
 
 void FrameLoader::dispatchOnloadEvents()
@@ -3785,6 +3794,8 @@ void FrameLoader::receivedMainResourceError(const ResourceError& error, LoadWill
     }
     if (frame->page())
         checkLoadComplete(loadWillContinueInAnotherProcess);
+
+    InspectorInstrumentation::didReceiveMainResourceError(m_frame, error);
 }
 
 void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequest& request, const SecurityOrigin* requesterOrigin, bool shouldContinue, NavigationHistoryBehavior historyHandling)
@@ -4789,9 +4800,6 @@ String FrameLoader::referrer() const
 
 void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
 {
-    if (!protect(m_frame->script())->canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
-        return;
-
     Vector<Ref<DOMWrapperWorld>> worlds;
     ScriptController::getAllWorlds(worlds);
     for (auto& world : worlds)
@@ -4801,13 +4809,12 @@ void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds()
 void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld& world)
 {
     Ref frame = m_frame.get();
-    if (!protect(frame->script())->canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript) || !protect(frame->windowProxy())->existingJSWindowProxy(world))
-        return;
-
-    m_client->dispatchDidClearWindowObjectInWorld(world);
-
-    if (RefPtr page = frame->page())
-        page->inspectorController().didClearWindowObjectInWorld(frame, world);
+    if (frame->windowProxy().existingJSWindowProxy(world)) {
+        if (protect(frame->script())->canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
+            m_client->dispatchDidClearWindowObjectInWorld(world);
+        if (RefPtr page = frame->page())
+            page->inspectorController().didClearWindowObjectInWorld(m_frame, world);
+    }
 
     InspectorInstrumentation::didClearWindowObjectInWorld(frame, world);
 }
diff --git a/Source/WebCore/loader/LoaderStrategy.h b/Source/WebCore/loader/LoaderStrategy.h
index 9a5561ea2fa43baab02c7f8d43d29cf4a5543411..4b1c8dfd6be705aa3560685bb2453dd4e309372f 100644
--- a/Source/WebCore/loader/LoaderStrategy.h
+++ b/Source/WebCore/loader/LoaderStrategy.h
@@ -89,6 +89,7 @@ public:
 
     virtual bool isOnLine() const = 0;
     virtual void addOnlineStateChangeListener(Function<void(bool)>&&) = 0;
+    virtual void setEmulateOfflineState(bool) {};
 
     virtual bool shouldPerformSecurityChecks() const { return false; }
     virtual bool havePerformedSecurityChecks(const ResourceResponse&) const { return false; }
diff --git a/Source/WebCore/loader/ProgressTracker.cpp b/Source/WebCore/loader/ProgressTracker.cpp
index 3acb026789c46395be3f8cd6b837ebf207e215f7..a4e3c1e69fbbb108badd23f32e879423c0ec72e6 100644
--- a/Source/WebCore/loader/ProgressTracker.cpp
+++ b/Source/WebCore/loader/ProgressTracker.cpp
@@ -158,6 +158,8 @@ void ProgressTracker::progressCompleted(LocalFrame& frame)
     if (!m_numProgressTrackedFrames || originatingProgressFrame == &frame)
         finalProgressComplete();
 
+    InspectorInstrumentation::frameStoppedLoading(frame);
+
     m_client->didChangeEstimatedProgress();
 }
 
@@ -184,8 +186,6 @@ void ProgressTracker::finalProgressComplete()
         m_client->progressFinished(*frame);
         protect(m_page)->progressFinished(*frame);
         frame->loader().loadProgressingStatusChanged();
-
-        InspectorInstrumentation::frameStoppedLoading(*frame);
     }
 }
 
diff --git a/Source/WebCore/loader/cache/CachedResourceLoader.cpp b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
index 01466dae0f43c53e7e50dad34c73731fbc8240d6..f37b4130add559d50a869ab494a3f7fb99b275d1 100644
--- a/Source/WebCore/loader/cache/CachedResourceLoader.cpp
+++ b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
@@ -1159,8 +1159,11 @@ ResourceErrorOr<Ref<CachedResource>> CachedResourceLoader::requestResource(Cache
 
     request.updateReferrerPolicy(document ? document->referrerPolicy() : ReferrerPolicy::Default);
 
-    if (InspectorInstrumentation::willIntercept(frame.ptr(), request.resourceRequest()))
-        request.setCachingPolicy(CachingPolicy::DisallowCaching);
+    if (InspectorInstrumentation::willIntercept(frame.ptr(), request.resourceRequest())) {
+        // Playwright: we don't disable such caching in other browsers and it breaks css resource downloads,
+        // see https://github.com/microsoft/playwright/issues/19158
+        // request.setCachingPolicy(CachingPolicy::DisallowCaching);
+    }
 
     if (RefPtr documentLoader = m_documentLoader) {
         bool madeHTTPS { request.resourceRequest().wasSchemeOptimisticallyUpgraded() };
@@ -1817,8 +1820,9 @@ Vector<Ref<SVGImage>> CachedResourceLoader::allCachedSVGImages() const
 
 ResourceErrorOr<Ref<CachedResource>> CachedResourceLoader::preload(CachedResource::Type type, CachedResourceRequest&& request)
 {
-    if (InspectorInstrumentation::willIntercept(protect(frame()).get(), request.resourceRequest()))
-        return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, request.resourceRequest().url(), "Inspector intercept"_s });
+    // Playwright: <link rel=preload ... /> requests are intercepted (see https://github.com/microsoft/playwright/issues/16745)
+    // if (InspectorInstrumentation::willIntercept(protect(frame()).get(), request.resourceRequest()))
+    //     return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, request.resourceRequest().url(), "Inspector intercept"_s });
 
     RefPtr document = m_document;
     ASSERT(document);
diff --git a/Source/WebCore/page/ChromeClient.h b/Source/WebCore/page/ChromeClient.h
index 1a4fae919b725be107c91cde64f8ccfa30b1e839..2687ebc237823715ebfa06440d54e9dd6dbddd8e 100644
--- a/Source/WebCore/page/ChromeClient.h
+++ b/Source/WebCore/page/ChromeClient.h
@@ -408,7 +408,7 @@ public:
 #endif
 
 #if ENABLE(ORIENTATION_EVENTS)
-    virtual IntDegrees deviceOrientation() const = 0;
+    virtual IntDegrees deviceOrientation() const { return 0; }
 #endif
 
     virtual RefPtr<ColorChooser> createColorChooser(ColorChooserClient&, const Color&) = 0;
diff --git a/Source/WebCore/page/EventHandler.cpp b/Source/WebCore/page/EventHandler.cpp
index d425f52413eba85996fc0a1fae3a0af0974a1d5d..4fa3846cd38402a61676be5330e354ed7d96f92b 100644
--- a/Source/WebCore/page/EventHandler.cpp
+++ b/Source/WebCore/page/EventHandler.cpp
@@ -4823,6 +4823,12 @@ bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, CheckDr
     if (!document)
         return false;
 
+#if PLATFORM(MAC)
+    auto* page = m_frame->page();
+    if (page && !page->overrideDragPasteboardName().isEmpty())
+        dragState().dataTransfer = DataTransfer::createForDrag(*document, page->overrideDragPasteboardName());
+    else
+#endif
     dragState().dataTransfer = DataTransfer::createForDrag(*document);
     auto hasNonDefaultPasteboardData = HasNonDefaultPasteboardData::No;
     
@@ -5427,6 +5433,7 @@ static HitTestResult hitTestResultInFrame(LocalFrame* frame, const LayoutPoint&
     return result;
 }
 
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
 Expected<bool, RemoteFrameGeometryTransformer> EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
 {
     Ref frame = m_frame.get();
@@ -5558,7 +5565,7 @@ Expected<bool, RemoteFrameGeometryTransformer> EventHandler::handleTouchEvent(co
         if (!targetFrame)
             continue;
 
-#if PLATFORM(WPE) || PLATFORM(GTK)
+#if !ENABLE(IOS_TOUCH_EVENTS)
         RefPtr<EventTarget> pointerTarget = touchTarget;
 
         if (pointState != PlatformTouchPoint::TouchPressed) {
@@ -5654,6 +5661,7 @@ Expected<bool, RemoteFrameGeometryTransformer> EventHandler::handleTouchEvent(co
 
     return swallowedEvent;
 }
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
 #endif // ENABLE(TOUCH_EVENTS) && !ENABLE(IOS_TOUCH_EVENTS)
 
 #if ENABLE(TOUCH_EVENTS)
diff --git a/Source/WebCore/page/FocusController.cpp b/Source/WebCore/page/FocusController.cpp
index 1862c8160a30a39f04c64819ab4be917fba219ca..b1877c40f4111f02d448ed9d5df2a2c5723f3a5b 100644
--- a/Source/WebCore/page/FocusController.cpp
+++ b/Source/WebCore/page/FocusController.cpp
@@ -708,13 +708,14 @@ bool FocusController::relinquishFocusToChrome(FocusDirection direction)
         return false;
 
     Ref page = m_page.get();
-    if (!page->chrome().canTakeFocus(direction) || page->isControlledByAutomation())
+    if (!page->chrome().canTakeFocus(direction))
         return false;
 
     clearSelectionIfNeeded(frame.get(), nullptr, nullptr);
     document->setFocusedElement(nullptr);
     setFocusedFrame(nullptr);
-    page->chrome().takeFocus(direction);
+    if (!page->isControlledByAutomation())
+      page->chrome().takeFocus(direction);
     return true;
 }
 
diff --git a/Source/WebCore/page/FrameConsoleClient.cpp b/Source/WebCore/page/FrameConsoleClient.cpp
index 23e6d8380ec1e3488bc746887ea06be8eed79fb9..7a1b91c923530472bf1bd613a237dd5a8739b88f 100644
--- a/Source/WebCore/page/FrameConsoleClient.cpp
+++ b/Source/WebCore/page/FrameConsoleClient.cpp
@@ -478,4 +478,12 @@ void FrameConsoleClient::screenshot(JSC::JSGlobalObject* lexicalGlobalObject, Re
     addMessage(makeUnique<Inspector::ConsoleMessage>(MessageSource::ConsoleAPI, MessageType::Image, MessageLevel::Log, dataURL, ScriptArguments::create(lexicalGlobalObject, WTF::move(adjustedArguments)), lexicalGlobalObject, /* requestIdentifier */ 0, timestamp));
 }
 
+void FrameConsoleClient::bindingCalled(JSC::JSGlobalObject* globalObject, const String& name, const String& arg)
+{
+    RefPtr frame = m_frame.get();
+    if (!frame)
+        return;
+    InspectorInstrumentation::bindingCalled(*frame->page(), globalObject, name, arg);
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/page/FrameConsoleClient.h b/Source/WebCore/page/FrameConsoleClient.h
index 7a6671ff0da0bbec833318a1c37e6280ad9f4255..5a16fa04c515f0c3842d1187eeacc487a7491080 100644
--- a/Source/WebCore/page/FrameConsoleClient.h
+++ b/Source/WebCore/page/FrameConsoleClient.h
@@ -92,6 +92,7 @@ private:
     void record(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
     void recordEnd(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
     void screenshot(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
+    void bindingCalled(JSC::JSGlobalObject*, const String& name, const String& arg) override;
 
     WeakRef<LocalFrame> m_frame;
 };
diff --git a/Source/WebCore/page/FrameSnapshotting.cpp b/Source/WebCore/page/FrameSnapshotting.cpp
index dd21eb7cd8958c99a153769d26e03a8eb5bed0fb..a94d8b5d2eced11e03f963d3848159914d554ae3 100644
--- a/Source/WebCore/page/FrameSnapshotting.cpp
+++ b/Source/WebCore/page/FrameSnapshotting.cpp
@@ -121,7 +121,7 @@ RefPtr<ImageBuffer> snapshotFrameRectWithClip(LocalFrame& frame, const IntRect&
     // Other paint behaviors are set by paintContentsForSnapshot.
     frame.view()->setPaintBehavior(paintBehavior);
 
-    float scaleFactor = frame.page()->deviceScaleFactor();
+    float scaleFactor = options.flags.contains(SnapshotFlags::OmitDeviceScaleFactor) ? 1 : frame.page()->deviceScaleFactor();
     if (options.flags.contains(SnapshotFlags::PaintWith3xBaseScale))
         scaleFactor = 3;
 
@@ -140,6 +140,8 @@ RefPtr<ImageBuffer> snapshotFrameRectWithClip(LocalFrame& frame, const IntRect&
         return nullptr;
 
     buffer->context().translate(-imageRect.location());
+    if (coordinateSpace != LocalFrameView::ViewCoordinates)
+        buffer->context().scale(1 / frame.page()->pageScaleFactor());
 
     if (!clipRects.isEmpty()) {
         Path clipPath;
@@ -148,7 +150,10 @@ RefPtr<ImageBuffer> snapshotFrameRectWithClip(LocalFrame& frame, const IntRect&
         buffer->context().clipPath(clipPath);
     }
 
-    frame.view()->paintContentsForSnapshot(buffer->context(), imageRect, shouldIncludeSelection, coordinateSpace);
+    FloatRect fr = imageRect;
+    if (coordinateSpace != LocalFrameView::ViewCoordinates)
+        fr.scale(frame.page()->pageScaleFactor());
+    frame.view()->paintContentsForSnapshot(buffer->context(), enclosingIntRect(fr), shouldIncludeSelection, coordinateSpace);
     return buffer;
 }
 
diff --git a/Source/WebCore/page/FrameSnapshotting.h b/Source/WebCore/page/FrameSnapshotting.h
index c34982712f798dff6c484e4a4b6b6a9b23905d4a..52da92d68344cd4d734db4565f174bbd05e26ad9 100644
--- a/Source/WebCore/page/FrameSnapshotting.h
+++ b/Source/WebCore/page/FrameSnapshotting.h
@@ -60,6 +60,7 @@ enum class SnapshotFlags : uint16_t {
     FixedAndStickyLayersOnly                = 1 << 12,
     DraggableElement                        = 1 << 13,
     IncludeDocumentMarkers                  = 1 << 14,
+    OmitDeviceScaleFactor                   = 1 << 15,
 };
 
 struct SnapshotOptions {
diff --git a/Source/WebCore/page/History.cpp b/Source/WebCore/page/History.cpp
index 6cde8d25af42de8e96f6aa23dbeedb5abaa7feab..bef6092300de6f6d33c5a9e2a9354e00c200d9ef 100644
--- a/Source/WebCore/page/History.cpp
+++ b/Source/WebCore/page/History.cpp
@@ -35,6 +35,7 @@
 #include "FrameLoader.h"
 #include "HistoryController.h"
 #include "HistoryItem.h"
+#include "InspectorInstrumentation.h"
 #include "LocalFrame.h"
 #include "LocalFrameInlines.h"
 #include "LocalFrameLoaderClient.h"
@@ -97,7 +98,7 @@ ExceptionOr<History::ScrollRestoration> History::scrollRestoration() const
     RefPtr historyItem = frame->loader().history().currentItem();
     if (!historyItem)
         return ScrollRestoration::Auto;
-    
+
     return historyItem->shouldRestoreScrollPosition() ? ScrollRestoration::Auto : ScrollRestoration::Manual;
 }
 
@@ -315,6 +316,8 @@ ExceptionOr<void> History::stateObjectAdded(RefPtr<SerializedScriptValue>&& data
     }
 
     frame->loader().updateURLAndHistory(fullURL, WTF::move(data), historyBehavior);
+    InspectorInstrumentation::didNavigateWithinPage(*frame);
+
     return { };
 }
 
diff --git a/Source/WebCore/page/LocalFrame.cpp b/Source/WebCore/page/LocalFrame.cpp
index 50342738fed8b72c737e834caa6517b3a642687f..3bf5c788d2a2091c521ae83a211de701d57bce4d 100644
--- a/Source/WebCore/page/LocalFrame.cpp
+++ b/Source/WebCore/page/LocalFrame.cpp
@@ -41,6 +41,7 @@
 #include "CachedCSSStyleSheet.h"
 #include "Chrome.h"
 #include "ChromeClient.h"
+#include "ComposedTreeIterator.h"
 #include "DiagnosticLoggingClient.h"
 #include "DiagnosticLoggingKeys.h"
 #include "DocumentLoader.h"
@@ -92,6 +93,7 @@
 #include "MixedContentChecker.h"
 #include "Navigator.h"
 #include "NodeList.h"
+#include "NodeRenderStyle.h"
 #include "NodeTraversal.h"
 #include "Page.h"
 #include "PaymentSession.h"
@@ -226,6 +228,7 @@ LocalFrame::LocalFrame(Page& page, ClientCreator&& clientCreator, FrameIdentifie
 
 void LocalFrame::init()
 {
+    InspectorInstrumentation::frameAttached(this);
     loader().init();
 }
 
@@ -462,7 +465,7 @@ void LocalFrame::orientationChanged()
 IntDegrees LocalFrame::orientation() const
 {
     if (RefPtr page = this->page())
-        return page->chrome().client().deviceOrientation();
+        return page->orientation();
     return 0;
 }
 #endif // ENABLE(ORIENTATION_EVENTS)
@@ -1672,7 +1675,6 @@ String LocalFrame::frameURLProtocol() const
     return ""_s;
 }
 
-#if PLATFORM(COCOA)
 
 static bool nodeIsMouseFocusable(Node& node)
 {
@@ -1908,7 +1910,7 @@ RefPtr<Node> LocalFrame::nodeRespondingToDoubleClickEvent(const FloatPoint& view
         for (; node && node != terminationNode; node = node->parentInComposedTree()) {
             if (!node->hasEventListeners(eventNames().dblclickEvent))
                 continue;
-#if ENABLE(TOUCH_EVENTS)
+#if ENABLE(TWO_PHASE_CLICKS)
             if (!node->allowsDoubleTapGesture())
                 continue;
 #endif
@@ -1922,7 +1924,6 @@ RefPtr<Node> LocalFrame::nodeRespondingToDoubleClickEvent(const FloatPoint& view
     return qualifyingNodeAtViewportLocation(viewportLocation, adjustedViewportLocation, WTF::move(ancestorRespondingToDoubleClickEvent), ShouldApproximate::Yes);
 }
 
-#endif // PLATFORM(COCOA)
 
 } // namespace WebCore
 
diff --git a/Source/WebCore/page/LocalFrame.h b/Source/WebCore/page/LocalFrame.h
index 8f81b0ea3fc343e6c214ad566ab4a6d9b95f5c3b..53ac6ea36a6fb13debd0f029f78c4dc4037d24f2 100644
--- a/Source/WebCore/page/LocalFrame.h
+++ b/Source/WebCore/page/LocalFrame.h
@@ -29,6 +29,7 @@
 
 #include <WebCore/DOMPasteAccess.h>
 #include <WebCore/Frame.h>
+#include <WebCore/IntDegrees.h>
 #include <WebCore/HitTestRequest.h>
 #include <WebCore/ScrollbarMode.h>
 #include <wtf/CheckedRef.h>
@@ -129,9 +130,7 @@ enum {
 enum OverflowScrollAction { DoNotPerformOverflowScroll, PerformOverflowScroll };
 #endif
 
-#if PLATFORM(COCOA)
 using NodeQualifier = Function<RefPtr<Node> (const HitTestResult&, Node* terminationNode, IntRect* nodeBounds)>;
-#endif
 
 class LocalFrame final : public Frame {
 public:
@@ -232,7 +231,6 @@ public:
     WEBCORE_EXPORT DataDetectionResultsStorage& dataDetectionResults() LIFETIME_BOUND;
 #endif
 
-#if PLATFORM(COCOA)
     RefPtr<Node> betterApproximateNode(const IntPoint& testPoint, const NodeQualifier&, Node* best, Node* failedNode, IntPoint& bestPoint, IntRect& bestRect, const IntRect& testRect);
 
     WEBCORE_EXPORT RefPtr<Node> nodeRespondingToInteraction(const FloatPoint& viewportLocation, FloatPoint& adjustedViewportLocation);
@@ -246,7 +244,6 @@ public:
     WEBCORE_EXPORT RefPtr<Node> nodeRespondingToDoubleClickEvent(const FloatPoint& viewportLocation, FloatPoint& adjustedViewportLocation);
 
     static bool nodeWillRespondToMouseEvents(Node&);
-#endif // PLATFORM(COCOA)
 
 #if PLATFORM(IOS_FAMILY)
     const ViewportArguments& viewportArguments() const LIFETIME_BOUND;
@@ -324,6 +321,7 @@ public:
 
     WEBCORE_EXPORT FloatSize screenSize() const;
     void setOverrideScreenSize(FloatSize&&);
+    bool hasScreenSizeOverride() const { return !!m_overrideScreenSize; }
 
     void NODELETE selfOnlyRef();
     void selfOnlyDeref();
diff --git a/Source/WebCore/page/Page.cpp b/Source/WebCore/page/Page.cpp
index 52c005d8cf66917c42f05c5cd478b3d2e2b1cac3..13ba48bae2d135b620fd80a642c060a906e3b38c 100644
--- a/Source/WebCore/page/Page.cpp
+++ b/Source/WebCore/page/Page.cpp
@@ -697,6 +697,44 @@ void Page::setOverrideViewportArguments(const std::optional<ViewportArguments>&
         localTopDocument->updateViewportArguments();
 }
 
+FloatSize Page::screenSize()
+{
+    RefPtr localMainFrame = this->localMainFrame();
+    RefPtr frameView = localMainFrame ? localMainFrame->view() : nullptr;
+    if (!frameView)
+        return { };
+    return m_overrideScreenSize.value_or(screenRect(frameView.get()).size());
+}
+
+void Page::setOverrideScreenSize(std::optional<FloatSize> size)
+{
+    if (size == m_overrideScreenSize)
+        return;
+
+    m_overrideScreenSize = size;
+    RefPtr localMainFrame = this->localMainFrame();
+    if (auto* document = localMainFrame ? localMainFrame->document() : nullptr)
+        document->updateViewportArguments();
+}
+
+#if ENABLE(ORIENTATION_EVENTS)
+int Page::orientation() const
+{
+    return m_overrideOrientation.value_or(chrome().client().deviceOrientation());
+}
+
+void Page::setOverrideOrientation(std::optional<int> orientation)
+{
+    if (orientation == m_overrideOrientation)
+        return;
+
+    m_overrideOrientation = orientation;
+
+    if (RefPtr localMainFrame = this->localMainFrame())
+        localMainFrame->orientationChanged();
+}
+#endif
+
 ScrollingCoordinator* Page::scrollingCoordinator()
 {
     if (!m_scrollingCoordinator && m_settings->scrollingCoordinatorEnabled()) {
@@ -4417,6 +4455,26 @@ void Page::setUseDarkAppearanceOverride(std::optional<bool> valueOverride)
     appearanceDidChange();
 }
 
+void Page::setUseReducedMotionOverride(std::optional<bool> valueOverride)
+{
+    if (valueOverride == m_useReducedMotionOverride)
+        return;
+
+    m_useReducedMotionOverride = valueOverride;
+
+    appearanceDidChange();
+}
+
+void Page::setUseForcedColorsOverride(std::optional<bool> valueOverride)
+{
+    if (valueOverride == m_useForcedColorsOverride)
+        return;
+
+    m_useForcedColorsOverride = valueOverride;
+
+    appearanceDidChange();
+}
+
 void Page::setFullscreenInsets(const FloatBoxExtent& insets)
 {
     if (insets == m_fullscreenInsets)
diff --git a/Source/WebCore/page/Page.h b/Source/WebCore/page/Page.h
index 5bfae7e81b70cbd14f12e307bebd5b551f10c18b..ef95a268fd4aeb4ff5a325517386716ab17f257c 100644
--- a/Source/WebCore/page/Page.h
+++ b/Source/WebCore/page/Page.h
@@ -413,6 +413,9 @@ public:
     const ViewportArguments* overrideViewportArguments() const LIFETIME_BOUND { return m_overrideViewportArguments.get(); }
     WEBCORE_EXPORT void setOverrideViewportArguments(const std::optional<ViewportArguments>&);
 
+    WEBCORE_EXPORT FloatSize screenSize();
+    void setOverrideScreenSize(std::optional<FloatSize> size);
+
     static void refreshPlugins(bool reload);
     WEBCORE_EXPORT PluginData& pluginData();
     void clearPluginData();
@@ -498,6 +501,10 @@ public:
 #if ENABLE(DRAG_SUPPORT)
     DragController& dragController() LIFETIME_BOUND { return m_dragController.get(); }
     const DragController& dragController() const LIFETIME_BOUND { return m_dragController.get(); }
+#if PLATFORM(MAC)
+    void setDragPasteboardName(const String& pasteboardName) { m_overrideDragPasteboardName = pasteboardName; }
+    const String& overrideDragPasteboardName() { return m_overrideDragPasteboardName; }
+#endif
 #endif
     FocusController& focusController() const { return m_focusController; }
 #if ENABLE(CONTEXT_MENUS)
@@ -687,6 +694,10 @@ public:
     WEBCORE_EXPORT void setUseColorAppearance(bool useDarkAppearance, bool useElevatedUserInterfaceLevel);
     bool defaultUseDarkAppearance() const { return m_useDarkAppearance; }
     void setUseDarkAppearanceOverride(std::optional<bool>);
+    std::optional<bool> useReducedMotionOverride() const { return m_useReducedMotionOverride; }
+    void setUseReducedMotionOverride(std::optional<bool>);
+    std::optional<bool> useForcedColorsOverride() const { return m_useForcedColorsOverride; }
+    void setUseForcedColorsOverride(std::optional<bool>);
 
 #if ENABLE(TEXT_AUTOSIZING)
     float textAutosizingWidth() const { return m_textAutosizingWidth; }
@@ -1150,6 +1161,11 @@ public:
     WEBCORE_EXPORT void setInteractionRegionsEnabled(bool);
 #endif
 
+#if ENABLE(ORIENTATION_EVENTS)
+    int orientation() const;
+    WEBCORE_EXPORT void setOverrideOrientation(std::optional<int>);
+#endif
+
 #if ENABLE(DEVICE_ORIENTATION) && PLATFORM(IOS_FAMILY)
     DeviceOrientationUpdateProvider* deviceOrientationUpdateProvider() const { return m_deviceOrientationUpdateProvider.get(); }
 #endif
@@ -1484,6 +1500,9 @@ private:
 
 #if ENABLE(DRAG_SUPPORT)
     const UniqueRef<DragController> m_dragController;
+#if PLATFORM(MAC)
+    String m_overrideDragPasteboardName;
+#endif
 #endif
     const UniqueRef<FocusController> m_focusController;
 #if ENABLE(CONTEXT_MENUS)
@@ -1562,6 +1581,8 @@ private:
     bool m_useElevatedUserInterfaceLevel { false };
     bool m_useDarkAppearance { false };
     std::optional<bool> m_useDarkAppearanceOverride;
+    std::optional<bool> m_useReducedMotionOverride;
+    std::optional<bool> m_useForcedColorsOverride;
 
 #if ENABLE(TEXT_AUTOSIZING)
     float m_textAutosizingWidth { 0 };
@@ -1739,6 +1760,11 @@ private:
 #endif
 
     std::unique_ptr<ViewportArguments> m_overrideViewportArguments;
+    std::optional<FloatSize> m_overrideScreenSize;
+
+#if ENABLE(ORIENTATION_EVENTS)
+    std::optional<int> m_overrideOrientation;
+#endif
 
 #if ENABLE(DEVICE_ORIENTATION) && PLATFORM(IOS_FAMILY)
     RefPtr<DeviceOrientationUpdateProvider> m_deviceOrientationUpdateProvider;
diff --git a/Source/WebCore/page/PointerCaptureController.cpp b/Source/WebCore/page/PointerCaptureController.cpp
index e9fa28ab43ecb4f3139791eca2bbb7bd82cfd6e0..8bbb8c76d913c37b60472972eb1647c58622c5a7 100644
--- a/Source/WebCore/page/PointerCaptureController.cpp
+++ b/Source/WebCore/page/PointerCaptureController.cpp
@@ -213,7 +213,7 @@ bool PointerCaptureController::preventsCompatibilityMouseEventsForIdentifier(Poi
     return capturingData && capturingData->preventsCompatibilityMouseEvents;
 }
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
 static bool hierarchyHasCapturingEventListeners(Element* target, const AtomString& eventName)
 {
     for (RefPtr<ContainerNode> currentNode = target; currentNode; currentNode = currentNode->parentInComposedTree()) {
@@ -574,7 +574,7 @@ void PointerCaptureController::cancelPointer(PointerID pointerId, const IntPoint
     capturingData->pendingTargetOverride = nullptr;
     capturingData->state = CapturingData::State::Cancelled;
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
     capturingData->previousTarget = nullptr;
 #endif
 
diff --git a/Source/WebCore/page/PointerCaptureController.h b/Source/WebCore/page/PointerCaptureController.h
index bafa2e9995a142e1bc07d506204ff5f14cbeab9c..d06922b691b02699ca89483c6e4e5c43bb49303c 100644
--- a/Source/WebCore/page/PointerCaptureController.h
+++ b/Source/WebCore/page/PointerCaptureController.h
@@ -63,7 +63,7 @@ public:
 
     RefPtr<PointerEvent> pointerEventForMouseEvent(const MouseEvent&, PointerID, const String& pointerType);
 
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
     void dispatchEventForTouchAtIndex(EventTarget&, const PlatformTouchEvent&, unsigned, bool isPrimary, WindowProxy&, const DoublePoint&);
 #endif
 
@@ -91,12 +91,12 @@ private:
         WeakPtr<Document, WeakPtrImplWithEventTargetData> activeDocument;
         RefPtr<Element> pendingTargetOverride;
         RefPtr<Element> targetOverride;
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
         RefPtr<Element> previousTarget;
 #endif
         bool hasAnyElement() const {
             return pendingTargetOverride || targetOverride
-#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE) || PLATFORM(GTK))
+#if ENABLE(TOUCH_EVENTS)
                 || previousTarget
 #endif
                 ;
diff --git a/Source/WebCore/page/Screen.cpp b/Source/WebCore/page/Screen.cpp
index cd1f3ce09ba0ab6e414bfcb12f38918404946700..f78cd1f89fb32ce4b9109c80f1f7c303c351b4fc 100644
--- a/Source/WebCore/page/Screen.cpp
+++ b/Source/WebCore/page/Screen.cpp
@@ -125,6 +125,9 @@ int Screen::availLeft() const
     if (shouldApplyScreenFingerprintingProtections(*frame))
         return 0;
 
+    if (frame->hasScreenSizeOverride())
+        return 0;
+
     return static_cast<int>(screenAvailableRect(protect(frame->view()).get()).x());
 }
 
@@ -140,6 +143,9 @@ int Screen::availTop() const
     if (shouldApplyScreenFingerprintingProtections(*frame))
         return 0;
 
+    if (frame->hasScreenSizeOverride())
+        return 0;
+
     return static_cast<int>(screenAvailableRect(protect(frame->view()).get()).y());
 }
 
@@ -155,6 +161,9 @@ int Screen::availHeight() const
     if (shouldApplyScreenFingerprintingProtections(*frame))
         return static_cast<int>(frame->screenSize().height());
 
+    if (frame->hasScreenSizeOverride())
+        return static_cast<int>(frame->screenSize().height());
+
     return static_cast<int>(screenAvailableRect(protect(frame->view()).get()).height());
 }
 
@@ -170,6 +179,9 @@ int Screen::availWidth() const
     if (shouldApplyScreenFingerprintingProtections(*frame))
         return static_cast<int>(frame->screenSize().width());
 
+    if (frame->hasScreenSizeOverride())
+        return static_cast<int>(frame->screenSize().width());
+
     return static_cast<int>(screenAvailableRect(protect(frame->view()).get()).width());
 }
 
diff --git a/Source/WebCore/page/csp/ContentSecurityPolicy.cpp b/Source/WebCore/page/csp/ContentSecurityPolicy.cpp
index cb4f081221a783cb05b6f65dba5cf338600148d5..88c4adcd84270f24bc4394125d44f34d7b2011c6 100644
--- a/Source/WebCore/page/csp/ContentSecurityPolicy.cpp
+++ b/Source/WebCore/page/csp/ContentSecurityPolicy.cpp
@@ -352,6 +352,8 @@ template<typename Predicate, typename... Args>
 bool ContentSecurityPolicy::allPoliciesWithDispositionAllow(Disposition disposition, Predicate&& predicate, Args&&... args) const
     requires (!std::is_convertible_v<Predicate, ContentSecurityPolicy::ViolatedDirectiveCallback>)
 {
+    if (InspectorInstrumentation::shouldBypassCSP(m_scriptExecutionContext.get()))
+        return true;
     bool isReportOnly = disposition == ContentSecurityPolicy::Disposition::ReportOnly;
     for (auto& policy : m_policies) {
         if (policy->isReportOnly() != isReportOnly)
@@ -365,6 +367,8 @@ bool ContentSecurityPolicy::allPoliciesWithDispositionAllow(Disposition disposit
 template<typename Predicate, typename... Args>
 bool ContentSecurityPolicy::allPoliciesWithDispositionAllow(Disposition disposition, ViolatedDirectiveCallback&& callback, Predicate&& predicate, Args&&... args) const
 {
+    if (InspectorInstrumentation::shouldBypassCSP(m_scriptExecutionContext.get()))
+        return true;
     bool isReportOnly = disposition == ContentSecurityPolicy::Disposition::ReportOnly;
     bool isAllowed = true;
     for (auto& policy : m_policies) {
@@ -381,6 +385,8 @@ bool ContentSecurityPolicy::allPoliciesWithDispositionAllow(Disposition disposit
 template<typename Predicate, typename... Args>
 bool ContentSecurityPolicy::allPoliciesAllow(NOESCAPE const ViolatedDirectiveCallback& callback, Predicate&& predicate, Args&&... args) const
 {
+    if (InspectorInstrumentation::shouldBypassCSP(m_scriptExecutionContext.get()))
+        return true;
     bool isAllowed = true;
     for (auto& policy : m_policies) {
         if (const ContentSecurityPolicyDirective* violatedDirective = (policy.get()->*predicate)(args...)) {
diff --git a/Source/WebCore/page/wpe/DragControllerWPE.cpp b/Source/WebCore/page/wpe/DragControllerWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7bea08826a16de4774a55c81ccba0d81f7d72472
--- /dev/null
+++ b/Source/WebCore/page/wpe/DragControllerWPE.cpp
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2007-20 Apple Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "DragController.h"
+
+#include "DataTransfer.h"
+#include "Document.h"
+#include "DragData.h"
+#include "Editor.h"
+#include "Element.h"
+#include "Frame.h"
+#include "FrameDestructionObserverInlines.h"
+#include "LocalFrameInlines.h"
+#include "NodeInlines.h"
+#include "Pasteboard.h"
+#include "markup.h"
+
+namespace WebCore {
+
+// FIXME: These values are straight out of DragControllerMac, so probably have
+// little correlation with Gdk standards...
+const int DragController::MaxOriginalImageArea = 1500 * 1500;
+const int DragController::DragIconRightInset = 7;
+const int DragController::DragIconBottomInset = 3;
+
+const float DragController::DragImageAlpha = 0.75f;
+
+bool DragController::isCopyKeyDown(const DragData& dragData)
+{
+    return dragData.flags().contains(DragApplicationFlags::IsCopyKeyDown);
+}
+
+std::optional<DragOperation> DragController::dragOperation(const DragData& dragData)
+{
+    // FIXME: This logic is incomplete
+    if (dragData.containsURL())
+        return DragOperation::Copy;
+
+    return std::nullopt;
+}
+
+const IntSize& DragController::maxDragImageSize()
+{
+    static const IntSize maxDragImageSize(200, 200);
+    return maxDragImageSize;
+}
+
+void DragController::cleanupAfterSystemDrag()
+{
+}
+
+void DragController::declareAndWriteDragImage(DataTransfer& dataTransfer, Element& element, const URL& url, const String& label)
+{
+    auto* frame = element.document().frame();
+    ASSERT(frame);
+    frame->editor().writeImageToPasteboard(dataTransfer.pasteboard(), element, url, label);
+}
+
+}
diff --git a/Source/WebCore/platform/DragData.h b/Source/WebCore/platform/DragData.h
index 9e2964b6e5f27f3a9c9f39e95b37de574cd52b1b..20e211ebc0217e6f4e66118fd98a7eb42f0edc5d 100644
--- a/Source/WebCore/platform/DragData.h
+++ b/Source/WebCore/platform/DragData.h
@@ -93,8 +93,8 @@ public:
     // is initialized by the decoder and not in the constructor.
     DragData() = default;
 #if PLATFORM(WIN)
-    WEBCORE_EXPORT DragData(const DragDataMap&, const IntPoint& clientPosition, const IntPoint& globalPosition, OptionSet<DragOperation> sourceOperationMask, OptionSet<DragApplicationFlags> = { }, std::optional<PageIdentifier> pageID = std::nullopt);
-    const DragDataMap& dragDataMap();
+    WEBCORE_EXPORT DragData(const DragDataMap&, const IntPoint& clientPosition, const IntPoint& globalPosition, OptionSet<DragOperation> sourceOperationMask, OptionSet<DragApplicationFlags> = { }, OptionSet<DragDestinationAction> = anyDragDestinationAction(), std::optional<PageIdentifier> pageID = std::nullopt);
+    WEBCORE_EXPORT const DragDataMap& dragDataMap() const;
     void getDragFileDescriptorData(int& size, String& pathname);
     void getDragFileContentData(int size, void* dataBlob);
 #endif
@@ -147,7 +147,7 @@ private:
     String m_pasteboardName;
 #endif
 #if PLATFORM(WIN)
-    DragDataMap m_dragDataMap;
+    mutable DragDataMap m_dragDataMap;
 #endif
     bool m_disallowFileAccess { false };
 };
diff --git a/Source/WebCore/platform/Pasteboard.h b/Source/WebCore/platform/Pasteboard.h
index 18569a97050f6711699829d52a3177a4a48e3cca..7e7c7d74edb2f7b9c5769ffd15bf7eb97a7cd396 100644
--- a/Source/WebCore/platform/Pasteboard.h
+++ b/Source/WebCore/platform/Pasteboard.h
@@ -322,6 +322,7 @@ public:
     COMPtr<IDataObject> dataObject() const { return m_dataObject; }
     WEBCORE_EXPORT void setExternalDataObject(IDataObject*);
     const DragDataMap& dragDataMap() const LIFETIME_BOUND { return m_dragDataMap; }
+    WEBCORE_EXPORT DragDataMap createDragDataMap();
     void writeURLToWritableDataObject(const URL&, const String&);
     COMPtr<WCDataObject> writableDataObject() const { return m_writableDataObject; }
     void writeImageToDataObject(Element&, const URL&); // FIXME: Layering violation.
@@ -393,6 +394,7 @@ private:
     COMPtr<IDataObject> m_dataObject;
     COMPtr<WCDataObject> m_writableDataObject;
     DragDataMap m_dragDataMap;
+    bool m_forDrag = false;
 #endif
 };
 
diff --git a/Source/WebCore/platform/PlatformKeyboardEvent.h b/Source/WebCore/platform/PlatformKeyboardEvent.h
index 071f9fa0e6cfaa84d9b077e39a64bec9361ead9a..fdd0ec667cc7e2f59bd2d21c5c381ae54dde06d9 100644
--- a/Source/WebCore/platform/PlatformKeyboardEvent.h
+++ b/Source/WebCore/platform/PlatformKeyboardEvent.h
@@ -134,6 +134,7 @@ namespace WebCore {
         static String keyCodeForHardwareKeyCode(unsigned);
         static String keyIdentifierForWPEKeyCode(unsigned);
         static int windowsKeyCodeForWPEKeyCode(unsigned);
+        static unsigned WPEKeyCodeForWindowsKeyCode(int);
         static String singleCharacterString(unsigned);
 #endif
 
diff --git a/Source/WebCore/platform/PlatformScreen.cpp b/Source/WebCore/platform/PlatformScreen.cpp
index eac5bf40c150dba990c13775db0ae9e10f883574..563106c0d9fb259c2171aedd5d57efbf81049cc9 100644
--- a/Source/WebCore/platform/PlatformScreen.cpp
+++ b/Source/WebCore/platform/PlatformScreen.cpp
@@ -85,3 +85,24 @@ OptionSet<ContentsFormat> screenContentsFormatsForTesting()
 } // namespace WebCore
 
 #endif // PLATFORM(COCOA) || PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
+
+#if ENABLE(TOUCH_EVENTS)
+namespace WebCore {
+
+static std::optional<bool> _screenHasTouchDeviceOverride = std::nullopt;
+
+void setScreenHasTouchDeviceOverride(bool value) {
+  _screenHasTouchDeviceOverride = value;
+}
+std::optional<bool> screenHasTouchDeviceOverride() {
+    return _screenHasTouchDeviceOverride;
+}
+
+bool screenHasTouchDevice() {
+    if (screenHasTouchDeviceOverride())
+        return screenHasTouchDeviceOverride().value();
+    return platformScreenHasTouchDevice();
+}
+
+} // namespace WebCore
+#endif
diff --git a/Source/WebCore/platform/PlatformScreen.h b/Source/WebCore/platform/PlatformScreen.h
index 2a80049e6065880ac2e9d1a42784fc69659f889d..a804d1251cccef36547551344e9ebf838aec1e18 100644
--- a/Source/WebCore/platform/PlatformScreen.h
+++ b/Source/WebCore/platform/PlatformScreen.h
@@ -162,10 +162,14 @@ WEBCORE_EXPORT float screenScaleFactor(UIScreen * = nullptr);
 #endif
 
 #if ENABLE(TOUCH_EVENTS)
-#if PLATFORM(GTK)
+WEBCORE_EXPORT void setScreenHasTouchDeviceOverride(bool);
+WEBCORE_EXPORT std::optional<bool> screenHasTouchDeviceOverride();
+
 WEBCORE_EXPORT bool screenHasTouchDevice();
+#if PLATFORM(GTK)
+bool platformScreenHasTouchDevice();
 #else
-constexpr bool screenHasTouchDevice() { return true; }
+constexpr bool platformScreenHasTouchDevice() { return true; }
 #endif
 #endif
 
diff --git a/Source/WebCore/platform/PlatformTouchEvent.h b/Source/WebCore/platform/PlatformTouchEvent.h
index 8de9b7ed5c5c92eb9700105e5ae186755b13423a..91a007843f7539a2c61121217d393048877a8dc3 100644
--- a/Source/WebCore/platform/PlatformTouchEvent.h
+++ b/Source/WebCore/platform/PlatformTouchEvent.h
@@ -20,8 +20,8 @@
 #ifndef PlatformTouchEvent_h
 #define PlatformTouchEvent_h
 
-#include "PlatformEvent.h"
-#include "PlatformTouchPoint.h"
+#include <WebCore/PlatformEvent.h>
+#include <WebCore/PlatformTouchPoint.h>
 #include <wtf/Vector.h>
 
 #if ENABLE(TOUCH_EVENTS)
@@ -42,7 +42,7 @@ public:
 
     const Vector<PlatformTouchEvent>& predictedEvents() const LIFETIME_BOUND { return m_predictedEvents; }
 
-#if PLATFORM(WPE)
+#if !ENABLE(IOS_TOUCH_EVENTS)
     // FIXME: since WPE currently does not send touch stationary events, we need to be able to set
     // TouchCancelled touchPoints subsequently
     void setTouchPoints(Vector<PlatformTouchPoint>& touchPoints) { m_touchPoints = touchPoints; }
diff --git a/Source/WebCore/platform/adwaita/AdwaitaScrollbarPainter.h b/Source/WebCore/platform/adwaita/AdwaitaScrollbarPainter.h
index a251b8f6a5e05997594a2962e7fcb3fab49a27b2..fd95b909650098869d44c8860a525051fc6996f8 100644
--- a/Source/WebCore/platform/adwaita/AdwaitaScrollbarPainter.h
+++ b/Source/WebCore/platform/adwaita/AdwaitaScrollbarPainter.h
@@ -36,7 +36,7 @@ class GraphicsContext;
 
 namespace AdwaitaScrollbarPainter {
 
-static const unsigned scrollbarSize = 21;
+static const unsigned scrollbarSize = 0;
 static const unsigned scrollbarBorderSize = 1;
 static const unsigned thumbBorderSize = 1;
 static const unsigned overlayThumbSize = 3;
diff --git a/Source/WebCore/platform/graphics/ImageUtilities.h b/Source/WebCore/platform/graphics/ImageUtilities.h
index 2848aea78c6f4e7c75b2896428e4d5f6d32f4273..c1add6e2c65f702c056380a3744cc2af0ab05d7a 100644
--- a/Source/WebCore/platform/graphics/ImageUtilities.h
+++ b/Source/WebCore/platform/graphics/ImageUtilities.h
@@ -81,7 +81,7 @@ WEBCORE_EXPORT void createBitmapsFromImageData(std::span<const uint8_t> data, st
 WEBCORE_EXPORT RefPtr<SharedBuffer> createIconDataFromBitmaps(Vector<Ref<ShareableBitmap>>&&);
 WEBCORE_EXPORT void decodeImageWithSize(std::span<const uint8_t> data, std::optional<FloatSize>, CompletionHandler<void(RefPtr<ShareableBitmap>&&)>&&);
 
-Vector<uint8_t> encodeData(CGImageRef, const String& mimeType, std::optional<double> quality = std::nullopt);
+WEBCORE_EXPORT Vector<uint8_t> encodeData(CGImageRef, const String& mimeType, std::optional<double> quality = std::nullopt);
 WEBCORE_EXPORT String encodeDataURL(CGImageRef, const String& mimeType, std::optional<double> quality = std::nullopt);
 WEBCORE_EXPORT uint8_t NODELETE verifyImageBufferIsBigEnough(std::span<const uint8_t> buffer);
 RetainPtr<CFStringRef> utiFromImageBufferMIMEType(const String& mimeType);
diff --git a/Source/WebCore/platform/graphics/filters/software/FEComponentTransferSoftwareApplier.h b/Source/WebCore/platform/graphics/filters/software/FEComponentTransferSoftwareApplier.h
index 515ddea3cd42796efa9f41ad74be07a7447c337e..36db42e2a0822d5609b39046191f05a1f8d2b54b 100644
--- a/Source/WebCore/platform/graphics/filters/software/FEComponentTransferSoftwareApplier.h
+++ b/Source/WebCore/platform/graphics/filters/software/FEComponentTransferSoftwareApplier.h
@@ -23,6 +23,7 @@
 #pragma once
 
 #include "FilterEffectApplier.h"
+#include "PixelBuffer.h"
 #include <wtf/TZoneMalloc.h>
 
 namespace WebCore {
diff --git a/Source/WebCore/platform/graphics/win/ComplexTextControllerUniscribe.cpp b/Source/WebCore/platform/graphics/win/ComplexTextControllerUniscribe.cpp
index 775df102268b397e6c96e8b93296a7dbe6afcd26..cdbb7b79bde8ba30bc2b0f6bb579b44de72d7fc7 100644
--- a/Source/WebCore/platform/graphics/win/ComplexTextControllerUniscribe.cpp
+++ b/Source/WebCore/platform/graphics/win/ComplexTextControllerUniscribe.cpp
@@ -168,6 +168,33 @@ static Vector<unsigned> stringIndicesFromClusters(const Vector<WORD>& clusters,
     return stringIndices;
 }
 
+static int compactScriptItemsIfNeeded(std::span<const UChar> cp, Vector<SCRIPT_ITEM>& items, int numItems, const Font* font)
+{
+    // https://bugs.webkit.org/show_bug.cgi?id=201214
+    // Uniscribe is overly aggressive in separating the runs. It'll split "3d_rotation" into "3", "d", "_" and "rotation" and we
+    // will ScriptShape them separately. As a result, a ligature for "3d_rotation" in the Material icon set
+    // (https://www.materialui.co/icon/3d-rotation) will not be used. A quick and dirty hack is to glue them back here, only making
+    // this apply to the readable characters, digits and _.
+
+    if (!numItems)
+        return numItems;
+
+    if (font->platformData().hasVariations())
+        return numItems;
+
+    bool allGoodCharacters = true;
+    for (unsigned i = 0; allGoodCharacters && i < cp.size(); ++i) {
+        const UChar c = cp[i];
+        allGoodCharacters = (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_';
+    }
+    if (!allGoodCharacters)
+        return numItems;
+
+    // Consume entire string into a single run. |items| is at least numItems + 1 long.
+    items[1] = items[numItems];
+    return 1;
+}
+
 void ComplexTextController::collectComplexTextRunsForCharacters(std::span<const char16_t> cp, unsigned stringLocation, const Font* font)
 {
     if (!font) {
@@ -197,6 +224,8 @@ void ComplexTextController::collectComplexTextRunsForCharacters(std::span<const
     }
     items.resize(numItems + 1);
 
+    numItems = compactScriptItemsIfNeeded(cp, items, numItems, font);
+
     for (int i = 0; i < numItems; i++) {
         // Determine the string for this item.
         const char16_t* str = cp.data() + items[i].iCharPos;
diff --git a/Source/WebCore/platform/gtk/PlatformScreenGtk.cpp b/Source/WebCore/platform/gtk/PlatformScreenGtk.cpp
index 98d93889a1b97450fde21cee53e45111b622dca7..9362518e8351eb8fe5b30a2d7875417bb3da770d 100644
--- a/Source/WebCore/platform/gtk/PlatformScreenGtk.cpp
+++ b/Source/WebCore/platform/gtk/PlatformScreenGtk.cpp
@@ -121,7 +121,7 @@ bool screenSupportsExtendedColor(Widget*)
 }
 
 #if ENABLE(TOUCH_EVENTS)
-bool screenHasTouchDevice()
+bool platformScreenHasTouchDevice()
 {
     return getScreenProperties().screenHasTouchDevice;
 }
diff --git a/Source/WebCore/platform/libwpe/PlatformKeyboardEventLibWPE.cpp b/Source/WebCore/platform/libwpe/PlatformKeyboardEventLibWPE.cpp
index ee7238303b628d0be016c80e391fe8edb9de1439..dc3b000902cd7d8344ed3a16f49f57766864dd47 100644
--- a/Source/WebCore/platform/libwpe/PlatformKeyboardEventLibWPE.cpp
+++ b/Source/WebCore/platform/libwpe/PlatformKeyboardEventLibWPE.cpp
@@ -29,9 +29,11 @@
 #if USE(LIBWPE)
 #include "WindowsKeyboardCodes.h"
 #include <wpe/wpe.h>
+#include <wtf/HashMap.h>
 #include <wtf/HexNumber.h>
 #include <wtf/text/MakeString.h>
 #include <wtf/text/StringBuilder.h>
+#include <mutex>
 #endif
 
 namespace WebCore {
@@ -1304,6 +1306,246 @@ int PlatformKeyboardEvent::windowsKeyCodeForWPEKeyCode(unsigned keycode)
     return 0;
 }
 
+static const UncheckedKeyHashMap<int, unsigned>& WPEToWindowsKeyCodeMap()
+{
+    static UncheckedKeyHashMap<int, unsigned>* result;
+    static std::once_flag once;
+    std::call_once(
+        once,
+        [] {
+            const unsigned WPEKeyCodes[] = {
+                WPE_KEY_Cancel,
+                // FIXME: non-keypad keys should take precedence, so we skip WPE_KEY_KP_*
+                // WPE_KEY_KP_0,
+                // WPE_KEY_KP_1,
+                // WPE_KEY_KP_2,
+                // WPE_KEY_KP_3,
+                // WPE_KEY_KP_4,
+                // WPE_KEY_KP_5,
+                // WPE_KEY_KP_6,
+                // WPE_KEY_KP_7,
+                // WPE_KEY_KP_8,
+                // WPE_KEY_KP_9,
+                // WPE_KEY_KP_Multiply,
+                // WPE_KEY_KP_Add,
+                // WPE_KEY_KP_Subtract,
+                // WPE_KEY_KP_Decimal,
+                // WPE_KEY_KP_Divide,
+                // WPE_KEY_KP_Page_Up,
+                // WPE_KEY_KP_Page_Down,
+                // WPE_KEY_KP_End,
+                // WPE_KEY_KP_Home,
+                // WPE_KEY_KP_Left,
+                // WPE_KEY_KP_Up,
+                // WPE_KEY_KP_Right,
+                // WPE_KEY_KP_Down,
+                WPE_KEY_BackSpace,
+                // WPE_KEY_ISO_Left_Tab,
+                // WPE_KEY_3270_BackTab,
+                WPE_KEY_Tab,
+                WPE_KEY_Clear,
+                // WPE_KEY_ISO_Enter,
+                // WPE_KEY_KP_Enter,
+                WPE_KEY_Return,
+                WPE_KEY_Menu,
+                WPE_KEY_Pause,
+                WPE_KEY_AudioPause,
+                WPE_KEY_Caps_Lock,
+                WPE_KEY_Kana_Lock,
+                WPE_KEY_Kana_Shift,
+                WPE_KEY_Hangul,
+                WPE_KEY_Hangul_Hanja,
+                WPE_KEY_Kanji,
+                WPE_KEY_Escape,
+                WPE_KEY_space,
+                WPE_KEY_Page_Up,
+                WPE_KEY_Page_Down,
+                WPE_KEY_End,
+                WPE_KEY_Home,
+                WPE_KEY_Left,
+                WPE_KEY_Up,
+                WPE_KEY_Right,
+                WPE_KEY_Down,
+                WPE_KEY_Select,
+                WPE_KEY_Print,
+                WPE_KEY_Execute,
+                WPE_KEY_Insert,
+                WPE_KEY_KP_Insert,
+                WPE_KEY_Delete,
+                WPE_KEY_KP_Delete,
+                WPE_KEY_Help,
+                WPE_KEY_0,
+                WPE_KEY_parenright,
+                WPE_KEY_1,
+                WPE_KEY_exclam,
+                WPE_KEY_2,
+                WPE_KEY_at,
+                WPE_KEY_3,
+                WPE_KEY_numbersign,
+                WPE_KEY_4,
+                WPE_KEY_dollar,
+                WPE_KEY_5,
+                WPE_KEY_percent,
+                WPE_KEY_6,
+                WPE_KEY_asciicircum,
+                WPE_KEY_7,
+                WPE_KEY_ampersand,
+                WPE_KEY_8,
+                WPE_KEY_asterisk,
+                WPE_KEY_9,
+                WPE_KEY_parenleft,
+                WPE_KEY_a,
+                WPE_KEY_A,
+                WPE_KEY_b,
+                WPE_KEY_B,
+                WPE_KEY_c,
+                WPE_KEY_C,
+                WPE_KEY_d,
+                WPE_KEY_D,
+                WPE_KEY_e,
+                WPE_KEY_E,
+                WPE_KEY_f,
+                WPE_KEY_F,
+                WPE_KEY_g,
+                WPE_KEY_G,
+                WPE_KEY_h,
+                WPE_KEY_H,
+                WPE_KEY_i,
+                WPE_KEY_I,
+                WPE_KEY_j,
+                WPE_KEY_J,
+                WPE_KEY_k,
+                WPE_KEY_K,
+                WPE_KEY_l,
+                WPE_KEY_L,
+                WPE_KEY_m,
+                WPE_KEY_M,
+                WPE_KEY_n,
+                WPE_KEY_N,
+                WPE_KEY_o,
+                WPE_KEY_O,
+                WPE_KEY_p,
+                WPE_KEY_P,
+                WPE_KEY_q,
+                WPE_KEY_Q,
+                WPE_KEY_r,
+                WPE_KEY_R,
+                WPE_KEY_s,
+                WPE_KEY_S,
+                WPE_KEY_t,
+                WPE_KEY_T,
+                WPE_KEY_u,
+                WPE_KEY_U,
+                WPE_KEY_v,
+                WPE_KEY_V,
+                WPE_KEY_w,
+                WPE_KEY_W,
+                WPE_KEY_x,
+                WPE_KEY_X,
+                WPE_KEY_y,
+                WPE_KEY_Y,
+                WPE_KEY_z,
+                WPE_KEY_Z,
+                WPE_KEY_Meta_L,
+                WPE_KEY_Meta_R,
+                WPE_KEY_Sleep,
+                WPE_KEY_Num_Lock,
+                WPE_KEY_Scroll_Lock,
+                WPE_KEY_Shift_L,
+                WPE_KEY_Shift_R,
+                WPE_KEY_Control_L,
+                WPE_KEY_Control_R,
+                WPE_KEY_Alt_L,
+                WPE_KEY_Alt_R,
+                WPE_KEY_Back,
+                WPE_KEY_Forward,
+                WPE_KEY_Refresh,
+                WPE_KEY_Stop,
+                WPE_KEY_Search,
+                WPE_KEY_Favorites,
+                WPE_KEY_HomePage,
+                WPE_KEY_AudioMute,
+                WPE_KEY_AudioLowerVolume,
+                WPE_KEY_AudioRaiseVolume,
+                WPE_KEY_AudioNext,
+                WPE_KEY_AudioPrev,
+                WPE_KEY_AudioStop,
+                WPE_KEY_AudioMedia,
+                WPE_KEY_semicolon,
+                WPE_KEY_colon,
+                WPE_KEY_plus,
+                WPE_KEY_equal,
+                WPE_KEY_comma,
+                WPE_KEY_less,
+                WPE_KEY_minus,
+                WPE_KEY_underscore,
+                WPE_KEY_period,
+                WPE_KEY_greater,
+                WPE_KEY_slash,
+                WPE_KEY_question,
+                WPE_KEY_asciitilde,
+                WPE_KEY_quoteleft,
+                WPE_KEY_bracketleft,
+                WPE_KEY_braceleft,
+                WPE_KEY_backslash,
+                WPE_KEY_bar,
+                WPE_KEY_bracketright,
+                WPE_KEY_braceright,
+                WPE_KEY_quoteright,
+                WPE_KEY_quotedbl,
+                WPE_KEY_AudioRewind,
+                WPE_KEY_AudioForward,
+                WPE_KEY_AudioPlay,
+                WPE_KEY_F1,
+                WPE_KEY_F2,
+                WPE_KEY_F3,
+                WPE_KEY_F4,
+                WPE_KEY_F5,
+                WPE_KEY_F6,
+                WPE_KEY_F7,
+                WPE_KEY_F8,
+                WPE_KEY_F9,
+                WPE_KEY_F10,
+                WPE_KEY_F11,
+                WPE_KEY_F12,
+                WPE_KEY_F13,
+                WPE_KEY_F14,
+                WPE_KEY_F15,
+                WPE_KEY_F16,
+                WPE_KEY_F17,
+                WPE_KEY_F18,
+                WPE_KEY_F19,
+                WPE_KEY_F20,
+                WPE_KEY_F21,
+                WPE_KEY_F22,
+                WPE_KEY_F23,
+                WPE_KEY_F24,
+                WPE_KEY_VoidSymbol,
+                WPE_KEY_Red,
+                WPE_KEY_Green,
+                WPE_KEY_Yellow,
+                WPE_KEY_Blue,
+                WPE_KEY_PowerOff,
+                WPE_KEY_AudioRecord,
+                WPE_KEY_Display,
+                WPE_KEY_Subtitle,
+                WPE_KEY_Video
+            };
+            result = new UncheckedKeyHashMap<int, unsigned>();
+            for (unsigned WPEKeyCode : WPEKeyCodes) {
+                int winKeyCode = PlatformKeyboardEvent::windowsKeyCodeForWPEKeyCode(WPEKeyCode);
+                // If several gdk key codes map to the same win key code first one is used.
+                result->add(winKeyCode, WPEKeyCode);
+            }
+        });
+    return *result;
+}
+
+unsigned PlatformKeyboardEvent::WPEKeyCodeForWindowsKeyCode(int keycode)
+{
+    return WPEToWindowsKeyCodeMap().get(keycode);
+}
+
 String PlatformKeyboardEvent::singleCharacterString(unsigned val)
 {
     switch (val) {
diff --git a/Source/WebCore/platform/libwpe/PlatformPasteboardLibWPE.cpp b/Source/WebCore/platform/libwpe/PlatformPasteboardLibWPE.cpp
index e47f5bade7c0a27e8a27f8dc95b51174f025b4a6..016efe9bc0898bb648a33973e771b49ed4be5624 100644
--- a/Source/WebCore/platform/libwpe/PlatformPasteboardLibWPE.cpp
+++ b/Source/WebCore/platform/libwpe/PlatformPasteboardLibWPE.cpp
@@ -31,10 +31,18 @@
 #include "Pasteboard.h"
 #include <wpe/wpe.h>
 #include <wtf/Assertions.h>
+#include <wtf/HashMap.h>
+#include <wtf/NeverDestroyed.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
+static UncheckedKeyHashMap<String, String>& sharedPasteboard()
+{
+    static NeverDestroyed<UncheckedKeyHashMap<String, String>> pasteboard;
+    return pasteboard.get();
+}
+
 PlatformPasteboard::PlatformPasteboard(const String&)
     : m_pasteboard(wpe_pasteboard_get_singleton())
 {
@@ -59,76 +67,26 @@ int64_t PlatformPasteboard::changeCount() const
 
 void PlatformPasteboard::getTypes(Vector<String>& types) const
 {
-    struct wpe_pasteboard_string_vector pasteboardTypes = { nullptr, 0 };
-    wpe_pasteboard_get_types(m_pasteboard, &pasteboardTypes);
-    for (auto& typeString : unsafeMakeSpan(pasteboardTypes.strings, pasteboardTypes.length)) {
-        const auto length = std::min(static_cast<size_t>(typeString.length), std::numeric_limits<size_t>::max());
-        types.append(String(unsafeMakeSpan(typeString.data, length)));
-    }
-
-    wpe_pasteboard_string_vector_free(&pasteboardTypes);
+    for (const auto& type : sharedPasteboard().keys())
+        types.append(type);
 }
 
 String PlatformPasteboard::readString(size_t, const String& type) const
 {
-    struct wpe_pasteboard_string string = { nullptr, 0 };
-    wpe_pasteboard_get_string(m_pasteboard, type.utf8().data(), &string);
-    if (!string.length)
-        return String();
-
-    const auto length = std::min(static_cast<size_t>(string.length), std::numeric_limits<size_t>::max());
-    String returnValue(unsafeMakeSpan(string.data, length));
-
-    wpe_pasteboard_string_free(&string);
-    return returnValue;
+    return sharedPasteboard().get(type);
 }
 
 void PlatformPasteboard::write(const PasteboardWebContent& content)
 {
-    static constexpr auto plainText = "text/plain;charset=utf-8"_s;
-    static constexpr auto htmlText = "text/html"_s;
-
-    CString textString = content.text.utf8();
-    CString markupString = content.markup.utf8();
-
-    IGNORE_CLANG_WARNINGS_BEGIN("unsafe-buffer-usage-in-libc-call")
-    std::array<struct wpe_pasteboard_string_pair, 2> pairs = { {
-        { { nullptr, 0 }, { nullptr, 0 } },
-        { { nullptr, 0 }, { nullptr, 0 } },
-    } };
-    wpe_pasteboard_string_initialize(&pairs[0].type, plainText, strlen(plainText));
-    wpe_pasteboard_string_initialize(&pairs[0].string, textString.data(), textString.length());
-    wpe_pasteboard_string_initialize(&pairs[1].type, htmlText, strlen(htmlText));
-    wpe_pasteboard_string_initialize(&pairs[1].string, markupString.data(), markupString.length());
-    struct wpe_pasteboard_string_map map = { pairs.data(), pairs.size() };
-    IGNORE_CLANG_WARNINGS_END
-
-    wpe_pasteboard_write(m_pasteboard, &map);
-    m_changeCount++;
-
-    wpe_pasteboard_string_free(&pairs[0].type);
-    wpe_pasteboard_string_free(&pairs[0].string);
-    wpe_pasteboard_string_free(&pairs[1].type);
-    wpe_pasteboard_string_free(&pairs[1].string);
+    String plainText = "text/plain;charset=utf-8"_s;
+    String htmlText = "text/html;charset=utf-8"_s;
+    sharedPasteboard().set(plainText, content.text);
+    sharedPasteboard().set(htmlText, content.markup);
 }
 
 void PlatformPasteboard::write(const String& type, const String& string)
 {
-    struct wpe_pasteboard_string_pair pairs[] = {
-        { { nullptr, 0 }, { nullptr, 0 } },
-    };
-
-    auto typeUTF8 = type.utf8();
-    auto stringUTF8 = string.utf8();
-    wpe_pasteboard_string_initialize(&pairs[0].type, typeUTF8.data(), typeUTF8.length());
-    wpe_pasteboard_string_initialize(&pairs[0].string, stringUTF8.data(), stringUTF8.length());
-    struct wpe_pasteboard_string_map map = { pairs, 1 };
-
-    wpe_pasteboard_write(m_pasteboard, &map);
-    m_changeCount++;
-
-    wpe_pasteboard_string_free(&pairs[0].type);
-    wpe_pasteboard_string_free(&pairs[0].string);
+    sharedPasteboard().set(type, string);
 }
 
 Vector<String> PlatformPasteboard::typesSafeForDOMToReadAndWrite(const String&) const
diff --git a/Source/WebCore/platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.cpp b/Source/WebCore/platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.cpp
index 6a5b3325d2aae3c4769332fa7488e2ca7dd55ef5..3065482616cb5fbc61913f71822262bcbbbd43cf 100644
--- a/Source/WebCore/platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.cpp
+++ b/Source/WebCore/platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.cpp
@@ -35,6 +35,7 @@
 #include <gst/video/video.h>
 #include <wtf/TZoneMallocInlines.h>
 #include <wtf/glib/GUniquePtr.h>
+#include <wtf/text/ASCIILiteral.h>
 #include <wtf/text/MakeString.h>
 #include <wtf/text/WTFString.h>
 
diff --git a/Source/WebCore/platform/network/HTTPHeaderMap.cpp b/Source/WebCore/platform/network/HTTPHeaderMap.cpp
index df27a094a0b2239892c96b4f5835826bcf8d7540..3bbea5c96110c0ae70d944b7f6fb018e438cf8c4 100644
--- a/Source/WebCore/platform/network/HTTPHeaderMap.cpp
+++ b/Source/WebCore/platform/network/HTTPHeaderMap.cpp
@@ -237,8 +237,11 @@ void HTTPHeaderMap::add(HTTPHeaderName name, const String& value)
     auto index = m_commonHeaders.findIf([&](auto& header) {
         return header.key == name;
     });
+    // Align with Chromium and Firefox, but just for SetCookies where it is critical:
+    // https://bit.ly/2HCa0iq
+    String separator = name == HTTPHeaderName::SetCookie ? "playwright-set-cookie-separator"_s : ", "_s;
     if (index != notFound)
-        m_commonHeaders[index].value = makeString(m_commonHeaders[index].value, ", "_s, value);
+        m_commonHeaders[index].value = makeString(m_commonHeaders[index].value, separator, value);
     else
         m_commonHeaders.append(CommonHeader { name, value });
 }
diff --git a/Source/WebCore/platform/network/NetworkStorageSession.h b/Source/WebCore/platform/network/NetworkStorageSession.h
index 0640345cf5f133b7f84d3e32b272871d9beff519..320dce768def18327ee25e889109cd6d75ba4cac 100644
--- a/Source/WebCore/platform/network/NetworkStorageSession.h
+++ b/Source/WebCore/platform/network/NetworkStorageSession.h
@@ -201,6 +201,7 @@ public:
 
     NetworkingContext* context() const;
 #endif
+    WEBCORE_EXPORT void setCookiesFromResponse(const URL& firstParty, const SameSiteInfo&, const URL&, const String& setCookieValue);
 
     WEBCORE_EXPORT HTTPCookieAcceptPolicy cookieAcceptPolicy() const;
     WEBCORE_EXPORT void setCookie(const Cookie&);
diff --git a/Source/WebCore/platform/network/ResourceResponseBase.cpp b/Source/WebCore/platform/network/ResourceResponseBase.cpp
index e413db463376bcf31da4cd0f8e2f869f4b6a0a95..6d43a62553f3e82968964a89608a121a72bc3d74 100644
--- a/Source/WebCore/platform/network/ResourceResponseBase.cpp
+++ b/Source/WebCore/platform/network/ResourceResponseBase.cpp
@@ -21,7 +21,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
@@ -77,6 +77,7 @@ ResourceResponseBase::ResourceResponseBase(std::optional<ResourceResponseData>&&
     , m_httpStatusText(data ? WTF::move(data->httpStatusText) : String { })
     , m_httpVersion(data ? WTF::move(data->httpVersion) : String { })
     , m_httpHeaderFields(data ? WTF::move(data->httpHeaderFields) : HTTPHeaderMap { })
+    , m_httpRequestHeaderFields(data ? data->httpRequestHeaderFields : HTTPHeaderMap { })
     , m_networkLoadMetrics(data && data->networkLoadMetrics ? Box<NetworkLoadMetrics>::create(WTF::move(*data->networkLoadMetrics)) : Box<NetworkLoadMetrics> { })
     , m_certificateInfo(data ? WTF::move(data->certificateInfo) : std::nullopt)
     , m_httpStatusCode(data ? data->httpStatusCode : 0)
@@ -277,7 +278,7 @@ const String& ResourceResponseBase::mimeType() const
 {
     lazyInit(CommonFieldsOnly);
 
-    return m_mimeType; 
+    return m_mimeType;
 }
 
 void ResourceResponseBase::setMimeType(String&& mimeType)
@@ -291,7 +292,7 @@ void ResourceResponseBase::setMimeType(String&& mimeType)
     // FIXME: Should invalidate or update platform response if present.
 }
 
-long long ResourceResponseBase::expectedContentLength() const 
+long long ResourceResponseBase::expectedContentLength() const
 {
     lazyInit(CommonFieldsOnly);
 
@@ -304,7 +305,7 @@ void ResourceResponseBase::setExpectedContentLength(long long expectedContentLen
     m_isNull = false;
 
     // FIXME: Content length is determined by HTTP Content-Length header. We should update the header, so that it doesn't disagree with m_expectedContentLength.
-    m_expectedContentLength = expectedContentLength; 
+    m_expectedContentLength = expectedContentLength;
 
     // FIXME: Should invalidate or update platform response if present.
 }
@@ -395,7 +396,7 @@ const String& ResourceResponseBase::httpStatusText() const
 {
     lazyInit(AllFields);
 
-    return m_httpStatusText; 
+    return m_httpStatusText;
 }
 
 void ResourceResponseBase::setHTTPStatusText(String&& statusText)
@@ -410,16 +411,16 @@ void ResourceResponseBase::setHTTPStatusText(String&& statusText)
 const String& ResourceResponseBase::httpVersion() const
 {
     lazyInit(AllFields);
-    
+
     return m_httpVersion;
 }
 
 void ResourceResponseBase::setHTTPVersion(String&& versionText)
 {
     lazyInit(AllFields);
-    
+
     m_httpVersion = versionText;
-    
+
     // FIXME: Should invalidate or update platform response if present.
 }
 
@@ -557,12 +558,12 @@ String ResourceResponseBase::httpHeaderField(StringView name) const
 
     // If we already have the header, just return it instead of consuming memory by grabing all headers.
     String value = m_httpHeaderFields.get(name);
-    if (!value.isEmpty())        
+    if (!value.isEmpty())
         return value;
 
     lazyInit(AllFields);
 
-    return m_httpHeaderFields.get(name); 
+    return m_httpHeaderFields.get(name);
 }
 
 String ResourceResponseBase::httpHeaderField(HTTPHeaderName name) const
@@ -576,7 +577,7 @@ String ResourceResponseBase::httpHeaderField(HTTPHeaderName name) const
 
     lazyInit(AllFields);
 
-    return m_httpHeaderFields.get(name); 
+    return m_httpHeaderFields.get(name);
 }
 
 void ResourceResponseBase::updateHeaderParsedState(HTTPHeaderName name)
@@ -686,7 +687,7 @@ void ResourceResponseBase::parseCacheControlDirectives() const
     m_cacheControlDirectives = WebCore::parseCacheControlDirectives(m_httpHeaderFields);
     m_haveParsedCacheControlHeader = true;
 }
-    
+
 bool ResourceResponseBase::cacheControlContainsNoCache() const
 {
     if (!m_haveParsedCacheControlHeader)
@@ -707,7 +708,7 @@ bool ResourceResponseBase::cacheControlContainsMustRevalidate() const
         parseCacheControlDirectives();
     return m_cacheControlDirectives.mustRevalidate;
 }
-    
+
 bool ResourceResponseBase::cacheControlContainsImmutable() const
 {
     if (!m_haveParsedCacheControlHeader)
@@ -862,7 +863,7 @@ void ResourceResponseBase::lazyInit(InitLevel initLevel) const
 bool ResourceResponseBase::equalForWebKitLegacyChallengeComparison(const ResourceResponse& a, const ResourceResponse& b)
 {
     if (a.isNull() != b.isNull())
-        return false;  
+        return false;
     if (a.url() != b.url())
         return false;
     if (a.mimeType() != b.mimeType())
@@ -896,7 +897,7 @@ std::optional<ResourceResponseData> ResourceResponseBase::getResponseData() cons
     if (m_isNull)
         return std::nullopt;
     lazyInit(AllFields);
-    
+
     return { ResourceResponseData {
         URL { m_url },
         String { m_mimeType },
@@ -906,6 +907,7 @@ std::optional<ResourceResponseData> ResourceResponseBase::getResponseData() cons
         String { m_httpStatusText },
         String { m_httpVersion },
         HTTPHeaderMap { m_httpHeaderFields },
+        HTTPHeaderMap { m_httpRequestHeaderFields },
         m_networkLoadMetrics ? std::optional(*m_networkLoadMetrics) : std::nullopt,
         m_source,
         m_type,
@@ -982,6 +984,11 @@ std::optional<WebCore::ResourceResponseData> Coder<WebCore::ResourceResponseData
     if (!httpHeaderFields)
         return std::nullopt;
 
+    std::optional<WebCore::HTTPHeaderMap> httpRequestHeaderFields;
+    decoder >> httpRequestHeaderFields;
+    if (!httpRequestHeaderFields)
+        return std::nullopt;
+
     std::optional<short> httpStatusCode;
     decoder >> httpStatusCode;
     if (!httpStatusCode)
@@ -1041,6 +1048,7 @@ std::optional<WebCore::ResourceResponseData> Coder<WebCore::ResourceResponseData
         WTF::move(*httpStatusText),
         WTF::move(*httpVersion),
         WTF::move(*httpHeaderFields),
+        WTF::move(*httpRequestHeaderFields),
         std::nullopt,
         *source,
         *type,
diff --git a/Source/WebCore/platform/network/ResourceResponseBase.h b/Source/WebCore/platform/network/ResourceResponseBase.h
index ef0c552143191b48c1a52a0702c7596da349eff4..b69149fef86c536d95dd01c39da64f719b86e89d 100644
--- a/Source/WebCore/platform/network/ResourceResponseBase.h
+++ b/Source/WebCore/platform/network/ResourceResponseBase.h
@@ -21,7 +21,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #pragma once
@@ -228,9 +228,9 @@ public:
     WEBCORE_EXPORT bool containsInvalidHTTPHeaders() const;
 
     WEBCORE_EXPORT static ResourceResponse dataURLResponse(const URL&, const DataURLDecoder::Result&);
-    
+
     WEBCORE_EXPORT ResourceResponseBase(std::optional<ResourceResponseData>&&);
-    
+
     WEBCORE_EXPORT std::optional<ResourceResponseData> getResponseData() const;
 
 protected:
@@ -265,6 +265,11 @@ protected:
     String m_httpStatusText;
     String m_httpVersion;
     HTTPHeaderMap m_httpHeaderFields;
+
+public:
+    HTTPHeaderMap m_httpRequestHeaderFields;
+
+protected:
     Box<NetworkLoadMetrics> m_networkLoadMetrics;
 
     mutable std::optional<CertificateInfo> m_certificateInfo;
@@ -308,7 +313,7 @@ struct ResourceResponseData {
     ResourceResponseData() = default;
     ResourceResponseData(ResourceResponseData&&) = default;
     ResourceResponseData& operator=(ResourceResponseData&&) = default;
-    ResourceResponseData(URL&& url, String&& mimeType, long long expectedContentLength, String&& textEncodingName, int httpStatusCode, String&& httpStatusText, String&& httpVersion, HTTPHeaderMap&& httpHeaderFields, std::optional<NetworkLoadMetrics>&& networkLoadMetrics, ResourceResponseSource source, ResourceResponseBaseType type, ResourceResponseBaseTainting tainting, bool isRedirected, UsedLegacyTLS usedLegacyTLS, WasPrivateRelayed wasPrivateRelayed, String&& proxyName, bool isRangeRequested, std::optional<CertificateInfo> certificateInfo, IPAddressSpace ipAddressSpace)
+    ResourceResponseData(URL&& url, String&& mimeType, long long expectedContentLength, String&& textEncodingName, int httpStatusCode, String&& httpStatusText, String&& httpVersion, HTTPHeaderMap&& httpHeaderFields, HTTPHeaderMap&& httpRequestHeaderFields, std::optional<NetworkLoadMetrics>&& networkLoadMetrics, ResourceResponseSource source, ResourceResponseBaseType type, ResourceResponseBaseTainting tainting, bool isRedirected, UsedLegacyTLS usedLegacyTLS, WasPrivateRelayed wasPrivateRelayed, String&& proxyName, bool isRangeRequested, std::optional<CertificateInfo> certificateInfo, IPAddressSpace ipAddressSpace)
         : url(WTF::move(url))
         , mimeType(WTF::move(mimeType))
         , expectedContentLength(expectedContentLength)
@@ -317,6 +322,7 @@ struct ResourceResponseData {
         , httpStatusText(WTF::move(httpStatusText))
         , httpVersion(WTF::move(httpVersion))
         , httpHeaderFields(WTF::move(httpHeaderFields))
+        , httpRequestHeaderFields(WTF::move(httpRequestHeaderFields))
         , networkLoadMetrics(WTF::move(networkLoadMetrics))
         , source(source)
         , type(type)
@@ -341,6 +347,7 @@ struct ResourceResponseData {
     String httpStatusText;
     String httpVersion;
     HTTPHeaderMap httpHeaderFields;
+    HTTPHeaderMap httpRequestHeaderFields;
     std::optional<NetworkLoadMetrics> networkLoadMetrics;
     ResourceResponseBase::Source source;
     ResourceResponseBase::Type type;
diff --git a/Source/WebCore/platform/network/cocoa/NetworkStorageSessionCocoa.mm b/Source/WebCore/platform/network/cocoa/NetworkStorageSessionCocoa.mm
index 3ed98966972014b88f2a4ca24ea615717a9a812c..7b75b20a84474ac8f227666d2d8305a60c1923f5 100644
--- a/Source/WebCore/platform/network/cocoa/NetworkStorageSessionCocoa.mm
+++ b/Source/WebCore/platform/network/cocoa/NetworkStorageSessionCocoa.mm
@@ -582,6 +582,27 @@ bool NetworkStorageSession::setCookieFromDOM(const URL& firstParty, const SameSi
     return false;
 }
 
+void NetworkStorageSession::setCookiesFromResponse(const URL& firstParty, const SameSiteInfo& sameSiteInfo, const URL& url, const String& setCookieValue)
+{
+    auto thirdPartyCookieBlockingDecision = ThirdPartyCookieBlockingDecision::None;
+    Vector<String> cookieValues = setCookieValue.split('\n');
+    size_t count = cookieValues.size();
+    auto* cookies = [NSMutableArray arrayWithCapacity:count];
+    for (const auto& cookieValue : cookieValues) {
+        NSString* cookieString = cookieValue.createNSString().autorelease();
+        NSString* cookieKey = @"Set-Cookie";
+        NSDictionary* headers = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObject:cookieString] forKeys:[NSArray arrayWithObject:cookieKey]];
+        NSArray<NSHTTPCookie*>* parsedCookies = [NSHTTPCookie cookiesWithResponseHeaderFields:headers forURL:url.createNSURL().get()];
+        [cookies addObject:parsedCookies[0]];
+    }
+#if ENABLE(OPT_IN_PARTITIONED_COOKIES) && defined(CFN_COOKIE_ACCEPTS_POLICY_PARTITION) && CFN_COOKIE_ACCEPTS_POLICY_PARTITION
+    String partitionKey = isOptInCookiePartitioningEnabled() ? cookiePartitionIdentifier(firstParty) : String { };
+#else
+    String partitionKey;
+#endif
+    setHTTPCookiesForURL(cookieStorage().get(), cookies, url.createNSURL().get(), firstParty.createNSURL().get(), nsStringNilIfEmpty(partitionKey).get(), sameSiteInfo, thirdPartyCookieBlockingDecision);
+}
+
 static NSHTTPCookieAcceptPolicy httpCookieAcceptPolicy(CFHTTPCookieStorageRef cookieStorage)
 {
     ASSERT(hasProcessPrivilege(ProcessPrivilege::CanAccessRawCookies));
diff --git a/Source/WebCore/platform/network/curl/CookieJarDB.h b/Source/WebCore/platform/network/curl/CookieJarDB.h
index 96e0a63b347c170c963bc7e851f383b91665c5c8..2f0afc26bcc87e9440e201728778892b3fe35543 100644
--- a/Source/WebCore/platform/network/curl/CookieJarDB.h
+++ b/Source/WebCore/platform/network/curl/CookieJarDB.h
@@ -73,7 +73,7 @@ public:
     WEBCORE_EXPORT ~CookieJarDB();
 
 private:
-    CookieAcceptPolicy m_acceptPolicy { CookieAcceptPolicy::Always };
+    CookieAcceptPolicy m_acceptPolicy { CookieAcceptPolicy::OnlyFromMainDocumentDomain };
     String m_databasePath;
 
     bool m_detectedDatabaseCorruption { false };
diff --git a/Source/WebCore/platform/network/curl/NetworkStorageSessionCurl.cpp b/Source/WebCore/platform/network/curl/NetworkStorageSessionCurl.cpp
index 5a78d6c775542cd62d3b192dc60972fdbea92270..5dab0edfef83cc1672012d94bcb4d6390b91bc97 100644
--- a/Source/WebCore/platform/network/curl/NetworkStorageSessionCurl.cpp
+++ b/Source/WebCore/platform/network/curl/NetworkStorageSessionCurl.cpp
@@ -136,6 +136,12 @@ void NetworkStorageSession::setCookieAcceptPolicy(CookieAcceptPolicy policy) con
     cookieDatabase().setAcceptPolicy(policy);
 }
 
+void  NetworkStorageSession::setCookiesFromResponse(const URL& firstParty, const SameSiteInfo&, const URL& url, const String& setCookieValue)
+{
+    for (auto& cookieString : setCookieValue.split('\n'))
+        cookieDatabase().setCookie(firstParty, url, cookieString, CookieJarDB::Source::Network);
+}
+
 HTTPCookieAcceptPolicy NetworkStorageSession::cookieAcceptPolicy() const
 {
     switch (cookieDatabase().acceptPolicy()) {
diff --git a/Source/WebCore/platform/network/soup/NetworkStorageSessionSoup.cpp b/Source/WebCore/platform/network/soup/NetworkStorageSessionSoup.cpp
index f3c07eb9e056bf031d37b1d2d30a2ebcbe4ba42e..c6b732f75b4e3e823d8c3ebc0b825e389e1d175a 100644
--- a/Source/WebCore/platform/network/soup/NetworkStorageSessionSoup.cpp
+++ b/Source/WebCore/platform/network/soup/NetworkStorageSessionSoup.cpp
@@ -531,6 +531,26 @@ void NetworkStorageSession::replaceCookies(const Vector<Cookie>& cookies)
     g_signal_emit(jar, signalId, 0, nullptr, nullptr);
 }
 
+void  NetworkStorageSession::setCookiesFromResponse(const URL& firstParty, const SameSiteInfo&, const URL& url, const String& setCookieValue)
+{
+    auto origin = urlToSoupURI(url);
+    if (!origin)
+        return;
+
+    auto firstPartyURI = urlToSoupURI(firstParty);
+    if (!firstPartyURI)
+        return;
+
+    for (auto& cookieString : setCookieValue.split('\n')) {
+        GUniquePtr<SoupCookie> cookie(soup_cookie_parse(cookieString.utf8().data(), origin.get()));
+
+        if (!cookie)
+            continue;
+
+        soup_cookie_jar_add_cookie_full(cookieStorage(), cookie.release(), origin.get(), firstPartyURI.get());
+    }
+}
+
 void NetworkStorageSession::deleteCookie(const Cookie& cookie, CompletionHandler<void()>&& completionHandler)
 {
     GUniquePtr<SoupCookie> targetCookie(cookie.toSoupCookie());
diff --git a/Source/WebCore/platform/text/LocaleICU.cpp b/Source/WebCore/platform/text/LocaleICU.cpp
index 2eaf11c3c0739754768810694c0016d7a21a7951..f25e84fe43e2590829146a1d134776ec549de810 100644
--- a/Source/WebCore/platform/text/LocaleICU.cpp
+++ b/Source/WebCore/platform/text/LocaleICU.cpp
@@ -41,6 +41,7 @@
 #include <wtf/TZoneMallocInlines.h>
 #include <wtf/text/StringBuffer.h>
 #include <wtf/text/StringBuilder.h>
+#include <wtf/TZoneMallocInlines.h>
 #include <wtf/unicode/icu/ICUHelpers.h>
 
 #if USE(HARFBUZZ)
diff --git a/Source/WebCore/platform/win/ClipboardUtilitiesWin.cpp b/Source/WebCore/platform/win/ClipboardUtilitiesWin.cpp
index 8e6023c5f1200884723bd0871bf602ba4a37ad04..582365cfb1c9a109308d0133922ee4d2bc0ae7db 100644
--- a/Source/WebCore/platform/win/ClipboardUtilitiesWin.cpp
+++ b/Source/WebCore/platform/win/ClipboardUtilitiesWin.cpp
@@ -39,6 +39,7 @@
 #include <wtf/text/StringBuilder.h>
 #include <wtf/text/win/WCharStringExtras.h>
 #include <wtf/unicode/CharacterNames.h>
+#include "Pasteboard.h"
 
 namespace WebCore {
 
@@ -690,7 +691,10 @@ template<typename T> void getStringData(IDataObject* data, FORMATETC* format, Ve
     STGMEDIUM store;
     if (FAILED(data->GetData(format, &store)))
         return;
-    dataStrings.append(String({ static_cast<T*>(GlobalLock(store.hGlobal)), ::GlobalSize(store.hGlobal) / sizeof(T) }));
+    // The string here should be null terminated, but it could come from another app so lets lock it
+    // to the size to prevent an overflow.
+    String rawString = String({ static_cast<T*>(GlobalLock(store.hGlobal)), ::GlobalSize(store.hGlobal) / sizeof(T) });
+    dataStrings.append(String::fromUTF8(rawString.utf8().data()));
     GlobalUnlock(store.hGlobal);
     ReleaseStgMedium(&store);
 }
diff --git a/Source/WebCore/platform/win/ClipboardUtilitiesWin.h b/Source/WebCore/platform/win/ClipboardUtilitiesWin.h
index 61624f0c555886e11a82e933aa89a093b5273693..4471b458941d3394d99f85e983cf0d86e1a562d3 100644
--- a/Source/WebCore/platform/win/ClipboardUtilitiesWin.h
+++ b/Source/WebCore/platform/win/ClipboardUtilitiesWin.h
@@ -34,6 +34,7 @@ namespace WebCore {
 
 class Document;
 class DocumentFragment;
+class Pasteboard;
 
 HGLOBAL createGlobalData(const String&);
 HGLOBAL createGlobalData(const Vector<char>&);
diff --git a/Source/WebCore/platform/win/DragDataWin.cpp b/Source/WebCore/platform/win/DragDataWin.cpp
index 0379437d84807e4a8d3846afac5ec8a70e743e70..5b0461bf12535d4900ffaddc2a87826280505233 100644
--- a/Source/WebCore/platform/win/DragDataWin.cpp
+++ b/Source/WebCore/platform/win/DragDataWin.cpp
@@ -40,12 +40,13 @@
 
 namespace WebCore {
 
-DragData::DragData(const DragDataMap& data, const IntPoint& clientPosition, const IntPoint& globalPosition, OptionSet<DragOperation> sourceOperationMask, OptionSet<DragApplicationFlags> flags, std::optional<PageIdentifier> pageID)
+DragData::DragData(const DragDataMap& data, const IntPoint& clientPosition, const IntPoint& globalPosition, OptionSet<DragOperation> sourceOperationMask, OptionSet<DragApplicationFlags> flags, OptionSet<DragDestinationAction> dragDestinationAction, std::optional<PageIdentifier> pageID)
     : m_clientPosition(clientPosition)
     , m_globalPosition(globalPosition)
     , m_platformDragData(0)
     , m_draggingSourceOperationMask(sourceOperationMask)
     , m_applicationFlags(flags)
+    , m_dragDestinationActionMask(dragDestinationAction)
     , m_pageID(pageID)
     , m_dragDataMap(data)
 {
@@ -63,7 +64,7 @@ bool DragData::containsURL(FilenameConversionPolicy filenamePolicy) const
         || (filenamePolicy == ConvertFilenames && (m_dragDataMap.contains(filenameWFormat()->cfFormat) || m_dragDataMap.contains(filenameFormat()->cfFormat)));
 }
 
-const DragDataMap& DragData::dragDataMap()
+const DragDataMap& DragData::dragDataMap() const
 {
     if (!m_dragDataMap.isEmpty() || !m_platformDragData)
         return m_dragDataMap;
diff --git a/Source/WebCore/platform/win/KeyEventWin.cpp b/Source/WebCore/platform/win/KeyEventWin.cpp
index f6c0cc49e9c39686bb5a5b36c29762173f2b4d1f..f396b564ee4aa7203d1728ff8460837337e31fdd 100644
--- a/Source/WebCore/platform/win/KeyEventWin.cpp
+++ b/Source/WebCore/platform/win/KeyEventWin.cpp
@@ -41,10 +41,16 @@ namespace WebCore {
 
 static const unsigned short HIGH_BIT_MASK_SHORT = 0x8000;
 
-void PlatformKeyboardEvent::disambiguateKeyDownEvent(Type, bool)
+void PlatformKeyboardEvent::disambiguateKeyDownEvent(Type type, bool)
 {
-    // No KeyDown events on Windows to disambiguate.
-    ASSERT_NOT_REACHED();
+    m_type = type;
+    if (type == PlatformEvent::Type::RawKeyDown) {
+        m_text = String();
+        m_unmodifiedText = String();
+    } else {
+        m_keyIdentifier = String();
+        m_windowsVirtualKeyCode = 0;
+    }
 }
 
 OptionSet<PlatformEvent::Modifier> PlatformKeyboardEvent::currentStateOfModifierKeys()
diff --git a/Source/WebCore/platform/win/PasteboardWin.cpp b/Source/WebCore/platform/win/PasteboardWin.cpp
index 89eb26e07f1bc8174ed50f088a1a9e61e227c627..5949b188bf03caa7c35af1966b3879465f2a92f6 100644
--- a/Source/WebCore/platform/win/PasteboardWin.cpp
+++ b/Source/WebCore/platform/win/PasteboardWin.cpp
@@ -1145,7 +1145,21 @@ void Pasteboard::writeCustomData(const Vector<PasteboardCustomData>& data)
     }
 
     clear();
+    if (m_dataObject) {
+        const auto& customData = data.first();
+        customData.forEachPlatformString([&](auto& type, auto& string) {
+            writeString(type, string);
+        });
 
+        if (customData.hasSameOriginCustomData() || !customData.origin().isEmpty()) {
+            customData.forEachCustomString([&](auto& type, auto& string) {
+                writeString(type, string);
+            });
+        }
+        return;
+    }
+
+    // this is the real real clipboard. Prbaobly need to be doing drag data stuff.
     if (::OpenClipboard(m_owner)) {
         const auto& customData = data.first();
         customData.forEachPlatformStringOrBuffer([](auto& type, auto& stringOrBuffer) {
@@ -1184,4 +1198,25 @@ void Pasteboard::write(const Color&)
 {
 }
 
+DragDataMap Pasteboard::createDragDataMap() {
+    DragDataMap dragDataMap;
+    auto dragObject = dataObject();
+    if (!dragObject)
+        return dragDataMap;
+    // Enumerate clipboard content and load it in the map.
+    COMPtr<IEnumFORMATETC> itr;
+
+    if (FAILED(dragObject->EnumFormatEtc(DATADIR_GET, &itr)) || !itr)
+        return dragDataMap;
+
+    FORMATETC dataFormat;
+    while (itr->Next(1, &dataFormat, 0) == S_OK) {
+        Vector<String> dataStrings;
+        getClipboardData(dragObject.get(), &dataFormat, dataStrings);
+        if (!dataStrings.isEmpty())
+            dragDataMap.set(dataFormat.cfFormat, dataStrings);
+    }
+    return dragDataMap;
+}
+
 } // namespace WebCore
diff --git a/Source/WebCore/rendering/RenderLayerCompositor.cpp b/Source/WebCore/rendering/RenderLayerCompositor.cpp
index 7cf7bbc03d7824b38b097427587367b50978c2c0..00f87e2b8155d18385cd2aae8461c442266634ef 100644
--- a/Source/WebCore/rendering/RenderLayerCompositor.cpp
+++ b/Source/WebCore/rendering/RenderLayerCompositor.cpp
@@ -1065,8 +1065,10 @@ bool RenderLayerCompositor::updateCompositingLayers(CompositingUpdateType update
         return false;
     }
 
+#if !PLATFORM(GTK)  // Temporal workaround until https://bugs.webkit.org/show_bug.cgi?id=307077 is fixed
     if (!m_compositing && (m_forceCompositingMode || (isRootFrameCompositor() && page().pageOverlayController().overlayCount())))
         enableCompositingMode(true);
+#endif
 
     bool isPageScroll = !updateRootArg || updateRootArg == &rootRenderLayer();
     CheckedPtr updateRoot = &rootRenderLayer();
diff --git a/Source/WebCore/rendering/RenderTextControl.cpp b/Source/WebCore/rendering/RenderTextControl.cpp
index 7b1911e2444250e1b87bb9fd9b2d6e1e56fa43f0..fdbb83e5ac55b35390f2bf5f383cff5f7bbcf0ae 100644
--- a/Source/WebCore/rendering/RenderTextControl.cpp
+++ b/Source/WebCore/rendering/RenderTextControl.cpp
@@ -244,13 +244,13 @@ void RenderTextControl::layoutExcludedChildren(RelayoutChildren relayoutChildren
     }
 }
 
-#if PLATFORM(IOS_FAMILY)
 bool RenderTextControl::canScroll() const
 {
     auto innerText = innerTextElement();
     return innerText && innerText->renderer() && innerText->renderer()->hasNonVisibleOverflow();
 }
 
+#if PLATFORM(IOS_FAMILY)
 int RenderTextControl::innerLineHeight() const
 {
     if (auto innerTextElement = this->innerTextElement(); innerTextElement && innerTextElement->renderer())
diff --git a/Source/WebCore/rendering/RenderTextControl.h b/Source/WebCore/rendering/RenderTextControl.h
index 00011d61c20cf7509b03407ecbcc29ce2da0ccca..d939e62c37573487cf4df7a16cf6201b5400cf0c 100644
--- a/Source/WebCore/rendering/RenderTextControl.h
+++ b/Source/WebCore/rendering/RenderTextControl.h
@@ -38,8 +38,8 @@ public:
 
     WEBCORE_EXPORT HTMLTextFormControlElement& NODELETE textFormControlElement() const;
 
-#if PLATFORM(IOS_FAMILY)
     bool canScroll() const;
+#if PLATFORM(IOS_FAMILY)
     WEBCORE_EXPORT int innerLineHeight() const;
 #endif
 
diff --git a/Source/WebCore/workers/WorkerConsoleClient.cpp b/Source/WebCore/workers/WorkerConsoleClient.cpp
index fe03d2c8d0625725e07a2aa0eef3a0d9127cf211..9c661ee5f91766bb6d903cfd25f3c7a43d9f3538 100644
--- a/Source/WebCore/workers/WorkerConsoleClient.cpp
+++ b/Source/WebCore/workers/WorkerConsoleClient.cpp
@@ -257,4 +257,6 @@ void WorkerConsoleClient::screenshot(JSC::JSGlobalObject* lexicalGlobalObject, R
     InspectorInstrumentation::addMessageToConsole(protect(globalScope()), makeUnique<Inspector::ConsoleMessage>(MessageSource::ConsoleAPI, MessageType::Image, MessageLevel::Log, dataURL, ScriptArguments::create(lexicalGlobalObject, WTF::move(adjustedArguments)), lexicalGlobalObject, /* requestIdentifier */ 0, timestamp));
 }
 
+void WorkerConsoleClient::bindingCalled(JSC::JSGlobalObject*, const String&, const String&) { }
+
 } // namespace WebCore
diff --git a/Source/WebCore/workers/WorkerConsoleClient.h b/Source/WebCore/workers/WorkerConsoleClient.h
index 60e744703647b7593426c59814975bf12dc4ebaa..d5156a30396fb2ad7e73c5c5429a07d56df0c928 100644
--- a/Source/WebCore/workers/WorkerConsoleClient.h
+++ b/Source/WebCore/workers/WorkerConsoleClient.h
@@ -59,6 +59,7 @@ private:
     void record(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
     void recordEnd(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
     void screenshot(JSC::JSGlobalObject*, Ref<Inspector::ScriptArguments>&&) override;
+    void bindingCalled(JSC::JSGlobalObject*, const String& name, const String& arg) override;
 
     WorkerOrWorkletGlobalScope& globalScope() { return m_globalScope; }
 
diff --git a/Source/WebGPU/WGSL/UniformityAnalysis.cpp b/Source/WebGPU/WGSL/UniformityAnalysis.cpp
index 85806067d986a7f9047708500e1c510fd0df1834..39e066e5882c4fbe8f7b31bfa5d62e3188761709 100644
--- a/Source/WebGPU/WGSL/UniformityAnalysis.cpp
+++ b/Source/WebGPU/WGSL/UniformityAnalysis.cpp
@@ -118,8 +118,10 @@ struct FunctionInfo {
     {
         switch (severity) {
         case SeverityControl::Error:   return requiredToBeUniform[0];
+IGNORE_CLANG_WARNINGS_BEGIN("unsafe-buffer-usage")
         case SeverityControl::Warning: return requiredToBeUniform[1];
         case SeverityControl::Info:    return requiredToBeUniform[2];
+IGNORE_CLANG_WARNINGS_END
         case SeverityControl::Off:     return nullptr;
         }
         RELEASE_ASSERT_NOT_REACHED();
@@ -311,8 +313,10 @@ std::optional<Error> UniformityGraph::processFunction(AST::Function& function)
     m_currentFunction = &info;
 
     info.requiredToBeUniform[0] = info.createNode();
+IGNORE_CLANG_WARNINGS_BEGIN("unsafe-buffer-usage")
     info.requiredToBeUniform[1] = info.createNode();
     info.requiredToBeUniform[2] = info.createNode();
+IGNORE_CLANG_WARNINGS_END
     info.mayBeNonUniform = info.createNode();
     info.cfStart = info.createNode();
 
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
index dfc334dff3edea4f775d8f59ba3dd303af861735..de87609382fb0de678b10e8ea77a8c5a6f3acbe9 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
@@ -99,6 +99,8 @@
 
 #if PLATFORM(COCOA)
 #include <wtf/FileSystem.h>
+#include "NetworkDataTaskCocoa.h"
+#include "NetworkSessionCocoa.h"
 #include <wtf/OSObjectPtr.h>
 #include <wtf/spi/darwin/SandboxSPI.h>
 #endif
@@ -1318,6 +1320,14 @@ void NetworkConnectionToWebProcess::clearPageSpecificData(PageIdentifier pageID)
         storageSession->clearPageSpecificDataForResourceLoadStatistics(pageID);
 }
 
+void NetworkConnectionToWebProcess::setCookieFromResponse(const URL& firstParty, const SameSiteInfo& sameSiteInfo, const URL& url, const String& setCookieValue)
+{
+    auto* networkStorageSession = storageSession();
+    if (!networkStorageSession)
+        return;
+    networkStorageSession->setCookiesFromResponse(firstParty, sameSiteInfo, url, setCookieValue);
+}
+
 void NetworkConnectionToWebProcess::removeStorageAccessForFrame(FrameIdentifier frameID, PageIdentifier pageID)
 {
     if (CheckedPtr storageSession = m_networkProcess->storageSession(m_sessionID))
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
index 5d24c2e36dcdbee25a0bb005bf0a20963d442a31..aff9bb1a0a64d689e15f7be57bed9e5bec80be6a 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
@@ -399,6 +399,8 @@ private:
 
     void clearPageSpecificData(WebCore::PageIdentifier);
 
+    void setCookieFromResponse(const URL& firstParty, const WebCore::SameSiteInfo&, const URL& url, const String& setCookieValue);
+
     void removeStorageAccessForFrame(WebCore::FrameIdentifier, WebCore::PageIdentifier);
 
     void logUserInteraction(RegistrableDomain&&);
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
index 6f43a9c68ee5c247184e327bdda83ce65df444f5..b34971ca9e296106dda574f165c4f28d157ecdc6 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
@@ -83,6 +83,8 @@ messages -> NetworkConnectionToWebProcess WantsDispatchMessage {
 
     ClearPageSpecificData(WebCore::PageIdentifier pageID);
 
+    SetCookieFromResponse(URL firstParty, struct WebCore::SameSiteInfo sameSiteInfo, URL url, String setCookieValue);
+    
     [EnabledBy=StorageAccessAPIEnabled] RemoveStorageAccessForFrame(WebCore::FrameIdentifier frameID, WebCore::PageIdentifier pageID);
     LogUserInteraction(WebCore::RegistrableDomain domain)
     ResourceLoadStatisticsUpdated(Vector<WebCore::ResourceLoadStatistics> statistics) -> ()
diff --git a/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm b/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
index 446f6d91016132ceb2a28122990e844e4576ed4c..0886e0642ac2353de9184b12b8a0d23d6f0f0fd3 100644
--- a/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
+++ b/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
@@ -894,6 +894,14 @@ - (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)data
 
         resourceResponse.setDeprecatedNetworkLoadMetrics(WebCore::copyTimingData(taskMetrics.get(), networkDataTask->networkLoadMetrics()));
         resourceResponse.setProxyName(WTF::move(proxyName));
+
+        __block WebCore::HTTPHeaderMap requestHeaders;
+        NSURLSessionTaskTransactionMetrics *m = dataTask._incompleteTaskMetrics.transactionMetrics.lastObject;
+        [m.request.allHTTPHeaderFields enumerateKeysAndObjectsUsingBlock:^(NSString *name, NSString *value, BOOL *) {
+            requestHeaders.set(String(name), String(value));
+        }];
+        resourceResponse.m_httpRequestHeaderFields = WTF::move(requestHeaders);
+
         networkDataTask->didReceiveResponse(WTF::move(resourceResponse), negotiatedLegacyTLS, privateRelayed, [completionHandler = makeBlockPtr(completionHandler), taskIdentifier](WebCore::PolicyAction policyAction) {
 #if !LOG_DISABLED
             LOG(NetworkSession, "%zu didReceiveResponse completionHandler (%s)", taskIdentifier, toString(policyAction).characters());
diff --git a/Source/WebKit/NetworkProcess/curl/NetworkDataTaskCurl.cpp b/Source/WebKit/NetworkProcess/curl/NetworkDataTaskCurl.cpp
index 0a2c25f815f594b2de6168ffd8b083c625e42e1f..682c4584f34d6fab8b576b331561102d34a3751a 100644
--- a/Source/WebKit/NetworkProcess/curl/NetworkDataTaskCurl.cpp
+++ b/Source/WebKit/NetworkProcess/curl/NetworkDataTaskCurl.cpp
@@ -166,6 +166,7 @@ void NetworkDataTaskCurl::curlDidReceiveResponse(CurlRequest& request, CurlRespo
 
     updateNetworkLoadMetrics(receivedResponse.networkLoadMetrics);
     m_response.setDeprecatedNetworkLoadMetrics(Box<NetworkLoadMetrics>::create(WTF::move(receivedResponse.networkLoadMetrics)));
+    m_response.m_httpRequestHeaderFields = request.resourceRequest().httpHeaderFields();
 
     handleCookieHeaders(request.resourceRequest(), receivedResponse);
 
diff --git a/Source/WebKit/NetworkProcess/mac/com.apple.WebKit.NetworkProcess.sb.in b/Source/WebKit/NetworkProcess/mac/com.apple.WebKit.NetworkProcess.sb.in
index 38aee06c97b6c7d20e0569295bde4192999d9c6e..eb7159615e69a275fe0b52790311209e698458a3 100644
--- a/Source/WebKit/NetworkProcess/mac/com.apple.WebKit.NetworkProcess.sb.in
+++ b/Source/WebKit/NetworkProcess/mac/com.apple.WebKit.NetworkProcess.sb.in
@@ -455,9 +455,11 @@
 
 ;; FIXME: This should be removed when <rdar://problem/10479685> is fixed.
 ;; Restrict AppSandboxed processes from creating /Library/Keychains, but allow access to the contents of /Library/Keychains:
-(allow file-read-data file-read-metadata
-    (subpath "/Library/Keychains")
-    (home-subpath "/Library/Keychains"))
+;; Playwright begin
+;; (allow file-read-data file-read-metadata
+;;     (subpath "/Library/Keychains")
+;;     (home-subpath "/Library/Keychains"))
+;; Playwright end
 
 ;; Except deny access to new-style iOS Keychain folders which are UUIDs.
 (deny file-read* file-write*
diff --git a/Source/WebKit/NetworkProcess/soup/NetworkDataTaskSoup.cpp b/Source/WebKit/NetworkProcess/soup/NetworkDataTaskSoup.cpp
index f7edb09dfd0bcee4b60f4bf8ce16f8cbeea937f8..1c10fb6ea21b897015a5c0092fc8f6cd4fb34c0c 100644
--- a/Source/WebKit/NetworkProcess/soup/NetworkDataTaskSoup.cpp
+++ b/Source/WebKit/NetworkProcess/soup/NetworkDataTaskSoup.cpp
@@ -427,6 +427,8 @@ void NetworkDataTaskSoup::didSendRequest(GRefPtr<GInputStream>&& inputStream)
     else
         m_inputStream = WTF::move(inputStream);
 
+    auto& additionalMetrics = additionalNetworkLoadMetricsForWebInspector();
+    m_response.m_httpRequestHeaderFields = additionalMetrics.requestHeaders;
     dispatchDidReceiveResponse();
 }
 
diff --git a/Source/WebKit/PlatformWPE.cmake b/Source/WebKit/PlatformWPE.cmake
index f98ae19e9c5fa4b0601572de46b1e0a1c62e92d8..747157cb6b47441ed2c1ca89465c81a89acc7f2a 100644
--- a/Source/WebKit/PlatformWPE.cmake
+++ b/Source/WebKit/PlatformWPE.cmake
@@ -227,6 +227,7 @@ set(WPE_API_HEADER_TEMPLATES
     ${WEBKIT_DIR}/UIProcess/API/glib/WebKitWebsitePolicies.h.in
     ${WEBKIT_DIR}/UIProcess/API/glib/WebKitXRPermissionRequest.h.in
     ${WEBKIT_DIR}/UIProcess/API/glib/webkit.h.in
+    ${WEBKIT_DIR}/UIProcess/API/gtk/WebKitPointerLockPermissionRequest.h.in
 )
 
 if (ENABLE_2022_GLIB_API)
diff --git a/Source/WebKit/PlatformWin.cmake b/Source/WebKit/PlatformWin.cmake
index 86a1febedca9fcbe7203db8cec94e8db1ef25a43..efdc87688149706c783906b643489fbe695d61d2 100644
--- a/Source/WebKit/PlatformWin.cmake
+++ b/Source/WebKit/PlatformWin.cmake
@@ -54,8 +54,13 @@ list(APPEND WebKit_SOURCES
 
     UIProcess/win/AutomationClientWin.cpp
     UIProcess/win/AutomationSessionClientWin.cpp
+
+    UIProcess/win/InspectorPlaywrightAgentClientWin.cpp
     UIProcess/win/PageClientImpl.cpp
+    UIProcess/win/PageInspectorTargetProxyWin.cpp
     UIProcess/win/WebContextMenuProxyWin.cpp
+    UIProcess/win/WebPageInspectorEmulationAgentWin.cpp
+    UIProcess/win/WebPageInspectorInputAgentWin.cpp
     UIProcess/win/WebPageProxyWin.cpp
     UIProcess/win/WebPopupMenuProxyWin.cpp
     UIProcess/win/WebProcessPoolWin.cpp
@@ -71,6 +76,7 @@ list(APPEND WebKit_SOURCES
     WebProcess/MediaCache/WebMediaKeyStorageManager.cpp
 
     WebProcess/WebCoreSupport/win/WebPopupMenuWin.cpp
+    WebProcess/WebCoreSupport/win/WebDragClientWin.cpp
 
     WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp
 
diff --git a/Source/WebKit/Shared/API/Cocoa/WebKitPrivate.h b/Source/WebKit/Shared/API/Cocoa/WebKitPrivate.h
index 5c7a6999176357ad21ca673db75363f27cf33790..faa9a55d561a185a659519bcaa5a1026fa3b1921 100644
--- a/Source/WebKit/Shared/API/Cocoa/WebKitPrivate.h
+++ b/Source/WebKit/Shared/API/Cocoa/WebKitPrivate.h
@@ -45,6 +45,7 @@
 #import <WebKit/WKWebViewPrivate.h>
 #import <WebKit/_WKActivatedElementInfo.h>
 #import <WebKit/_WKAttachment.h>
+#import <WebKit/_WKBrowserInspector.h>
 #import <WebKit/_WKCaptionStyleMenuController.h>
 #import <WebKit/_WKContentWorldConfiguration.h>
 #import <WebKit/_WKElementAction.h>
diff --git a/Source/WebKit/Shared/AuxiliaryProcess.h b/Source/WebKit/Shared/AuxiliaryProcess.h
index 04ffbae16bdfe24465e635afce7f5042073158a0..9c87adff05fcdc47fb15cc4bcac86c26882c6e3e 100644
--- a/Source/WebKit/Shared/AuxiliaryProcess.h
+++ b/Source/WebKit/Shared/AuxiliaryProcess.h
@@ -216,6 +216,11 @@ struct AuxiliaryProcessInitializationParameters {
     IPC::Connection::Identifier connectionIdentifier;
     HashMap<String, String> extraInitializationData;
     WTF::AuxiliaryProcessType processType;
+// Playwright begin
+#if !PLATFORM(COCOA)
+    bool shouldEnableSharedArrayBuffer { false };
+#endif
+// Playwright end
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/Shared/NativeWebKeyboardEvent.h b/Source/WebKit/Shared/NativeWebKeyboardEvent.h
index 63cfe7fc9385af4f17293ad0e43997e688401cd8..e22b7ee6001ee06a731f01c4ca3ab2d3e2e525a8 100644
--- a/Source/WebKit/Shared/NativeWebKeyboardEvent.h
+++ b/Source/WebKit/Shared/NativeWebKeyboardEvent.h
@@ -33,6 +33,7 @@
 #if USE(APPKIT)
 #include <wtf/RetainPtr.h>
 OBJC_CLASS NSView;
+OBJC_CLASS NSEvent;
 #endif
 
 #if PLATFORM(GTK)
@@ -70,11 +71,19 @@ public:
 #if USE(APPKIT)
     // FIXME: Share iOS's HandledByInputMethod enum here instead of passing a boolean.
     NativeWebKeyboardEvent(NSEvent *, bool handledByInputMethod, bool replacesSoftSpace, const Vector<WebCore::KeypressCommand>&);
+    NativeWebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp, Vector<WebCore::KeypressCommand>&& commands)
+        : WebKeyboardEvent(type, text, unmodifiedText, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, isAutoRepeat, isKeypad, isSystemKey, modifiers, timestamp, WTF::move(commands))
+    {
+    }
 #elif PLATFORM(GTK)
     NativeWebKeyboardEvent(const NativeWebKeyboardEvent&);
     NativeWebKeyboardEvent(GdkEvent*, const String&, bool isAutoRepeat, Vector<String>&& commands);
     NativeWebKeyboardEvent(const String&, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<EditingRange>&&);
     NativeWebKeyboardEvent(WebEventType, const String& text, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, Vector<String>&& commands, bool isAutoRepeat, bool isKeypad, OptionSet<WebEventModifier>);
+    NativeWebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp, Vector<String>&& commands)
+        : WebKeyboardEvent(type, text, unmodifiedText, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, isAutoRepeat, isKeypad, isSystemKey, modifiers, timestamp, WTF::move(commands))
+    {
+    }
 #elif PLATFORM(IOS_FAMILY)
     enum class HandledByInputMethod : bool { No, Yes };
     NativeWebKeyboardEvent(::WebEvent *, HandledByInputMethod);
@@ -82,6 +91,10 @@ public:
 #if USE(LIBWPE)
     enum class HandledByInputMethod : bool { No, Yes };
     NativeWebKeyboardEvent(struct wpe_input_keyboard_event*, const String&, bool isAutoRepeat, HandledByInputMethod, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<EditingRange>&&);
+    NativeWebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp)
+        : WebKeyboardEvent(type, text, unmodifiedText, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, isAutoRepeat, isKeypad, isSystemKey, modifiers, timestamp)
+    {
+    }
 #endif
 #if ENABLE(WPE_PLATFORM)
     NativeWebKeyboardEvent(WPEEvent*, const String&, bool isAutoRepeat);
@@ -92,6 +105,10 @@ public:
     NativeWebKeyboardEvent(struct wpe_input_keyboard_event*, const String&, bool isAutoRepeat, HandledByInputMethod, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<EditingRange>&&);
 #elif PLATFORM(WIN)
     NativeWebKeyboardEvent(HWND, UINT message, WPARAM, LPARAM, Vector<MSG>&& pendingCharEvents);
+    NativeWebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp)
+        : WebKeyboardEvent(type, text, unmodifiedText, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, isAutoRepeat, isKeypad, isSystemKey, modifiers, timestamp)
+    {
+    }
 #endif
 
 #if USE(APPKIT)
diff --git a/Source/WebKit/Shared/NativeWebMouseEvent.h b/Source/WebKit/Shared/NativeWebMouseEvent.h
index 3f1087581732873bef9aab9de8010804a337e3e5..feb044c070a3042b3c4bf2e81078e52d5c8f7382 100644
--- a/Source/WebKit/Shared/NativeWebMouseEvent.h
+++ b/Source/WebKit/Shared/NativeWebMouseEvent.h
@@ -91,6 +91,11 @@ public:
     NativeWebMouseEvent(HWND, UINT message, WPARAM, LPARAM, bool, float deviceScaleFactor);
 #endif
 
+#if PLATFORM(GTK) || USE(LIBWPE) || PLATFORM(WIN)
+    NativeWebMouseEvent(WebEventType type, WebMouseEventButton button, unsigned short buttons, const WebCore::IntPoint& position, const WebCore::IntPoint& globalPosition, float deltaX, float deltaY, float deltaZ, int clickCount, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp)
+        : WebMouseEvent({type, modifiers, timestamp}, button, buttons, position, globalPosition, deltaX, deltaY, deltaZ, clickCount, 0, WebEventInputSource::UserDriven) { }
+#endif
+
 #if USE(APPKIT)
     NSEvent* nativeEvent() const { return m_nativeEvent.get(); }
 #elif PLATFORM(GTK)
diff --git a/Source/WebKit/Shared/NativeWebWheelEvent.h b/Source/WebKit/Shared/NativeWebWheelEvent.h
index b5361fedd7d921f512956d20819c49d425221080..3628908eeaba9dda7c19ded41b6da6e5c148d382 100644
--- a/Source/WebKit/Shared/NativeWebWheelEvent.h
+++ b/Source/WebKit/Shared/NativeWebWheelEvent.h
@@ -79,6 +79,11 @@ public:
     NativeWebWheelEvent(HWND, UINT message, WPARAM, LPARAM, float deviceScaleFactor);
 #endif
 
+#if !USE(APPKIT)
+    NativeWebWheelEvent(const WebWheelEvent & webWheelEvent)
+        : WebWheelEvent(webWheelEvent) { }
+#endif
+
 #if USE(APPKIT)
     NSEvent* nativeEvent() const { return m_nativeEvent.get(); }
 #elif PLATFORM(GTK)
diff --git a/Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in b/Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in
index 597e611a1b621f049fa034d7934cb7918cad8f87..5829c63b669d57903b73d7078a41ebfe9006fc89 100644
--- a/Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in
+++ b/Source/WebKit/Shared/WebCoreArgumentCoders.serialization.in
@@ -2728,6 +2728,9 @@ class WebCore::AuthenticationChallenge {
 class WebCore::DragData {
 #if PLATFORM(COCOA)
     String pasteboardName();
+#endif
+#if PLATFORM(WIN)
+    WebCore::DragDataMap dragDataMap();
 #endif
     WebCore::IntPoint clientPosition();
     WebCore::IntPoint globalPosition();
@@ -3160,6 +3163,7 @@ enum class WebCore::WasPrivateRelayed : bool;
     String httpStatusText;
     String httpVersion;
     WebCore::HTTPHeaderMap httpHeaderFields;
+    WebCore::HTTPHeaderMap httpRequestHeaderFields;
     std::optional<WebCore::NetworkLoadMetrics> networkLoadMetrics;
     WebCore::ResourceResponseBase::Source source;
     WebCore::ResourceResponseBase::Type type;
diff --git a/Source/WebKit/Shared/WebKeyboardEvent.cpp b/Source/WebKit/Shared/WebKeyboardEvent.cpp
index fcadde7e024c363ebdf53d1c20436af5d2512e1a..67cd6dce8d6c1bf66e429c29d9ed0a396718cb80 100644
--- a/Source/WebKit/Shared/WebKeyboardEvent.cpp
+++ b/Source/WebKit/Shared/WebKeyboardEvent.cpp
@@ -51,6 +51,24 @@ WebKeyboardEvent::WebKeyboardEvent(WebEvent&& event, const String& text, const S
     ASSERT(isKeyboardEventType(type()));
 }
 
+WebKeyboardEvent::WebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp, Vector<WebCore::KeypressCommand>&& commands)
+    : WebEvent(type, modifiers, timestamp)
+    , m_text(text)
+    , m_unmodifiedText(text)
+    , m_key(key)
+    , m_code(code)
+    , m_keyIdentifier(keyIdentifier)
+    , m_windowsVirtualKeyCode(windowsVirtualKeyCode)
+    , m_nativeVirtualKeyCode(nativeVirtualKeyCode)
+    , m_macCharCode(0)
+    , m_commands(WTF::move(commands))
+    , m_isAutoRepeat(isAutoRepeat)
+    , m_isKeypad(isKeypad)
+    , m_isSystemKey(isSystemKey)
+{
+    ASSERT(isKeyboardEventType(type));
+}
+
 #elif PLATFORM(GTK)
 
 WebKeyboardEvent::WebKeyboardEvent(WebEvent&& event, const String& text, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool handledByInputMethod, std::optional<Vector<WebCore::CompositionUnderline>>&& preeditUnderlines, std::optional<EditingRange>&& preeditSelectionRange, Vector<String>&& commands, bool isAutoRepeat, bool isKeypad)
@@ -74,6 +92,24 @@ WebKeyboardEvent::WebKeyboardEvent(WebEvent&& event, const String& text, const S
     ASSERT(isKeyboardEventType(type()));
 }
 
+WebKeyboardEvent::WebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp, Vector<String>&& commands)
+    : WebEvent(type, modifiers, timestamp)
+    , m_text(text)
+    , m_unmodifiedText(text)
+    , m_key(key)
+    , m_code(code)
+    , m_keyIdentifier(keyIdentifier)
+    , m_windowsVirtualKeyCode(windowsVirtualKeyCode)
+    , m_nativeVirtualKeyCode(nativeVirtualKeyCode)
+    , m_macCharCode(0)
+    , m_commands(WTF::move(commands))
+    , m_isAutoRepeat(isAutoRepeat)
+    , m_isKeypad(isKeypad)
+    , m_isSystemKey(isSystemKey)
+{
+    ASSERT(isKeyboardEventType(type));
+}
+
 #elif PLATFORM(IOS_FAMILY)
 
 WebKeyboardEvent::WebKeyboardEvent(WebEvent&& event, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, int macCharCode, bool handledByInputMethod, bool isAutoRepeat, bool isKeypad, bool isSystemKey)
@@ -137,6 +173,27 @@ WebKeyboardEvent::WebKeyboardEvent(WebEvent&& event, const String& text, const S
 
 #endif
 
+#if PLATFORM(WIN) || USE(LIBWPE)
+
+WebKeyboardEvent::WebKeyboardEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, MonotonicTime timestamp)
+    : WebEvent(type, modifiers, timestamp)
+    , m_text(text)
+    , m_unmodifiedText(text)
+    , m_key(key)
+    , m_code(code)
+    , m_keyIdentifier(keyIdentifier)
+    , m_windowsVirtualKeyCode(windowsVirtualKeyCode)
+    , m_nativeVirtualKeyCode(nativeVirtualKeyCode)
+    , m_macCharCode(0)
+    , m_isAutoRepeat(isAutoRepeat)
+    , m_isKeypad(isKeypad)
+    , m_isSystemKey(isSystemKey)
+{
+    ASSERT(isKeyboardEventType(type));
+}
+
+#endif
+
 WebKeyboardEvent::~WebKeyboardEvent() = default;
 
 bool WebKeyboardEvent::isKeyboardEventType(WebEventType type)
diff --git a/Source/WebKit/Shared/WebKeyboardEvent.h b/Source/WebKit/Shared/WebKeyboardEvent.h
index 8915f44919a131e5e12344362907396b3821e13e..62846c5c837a584c4180d6c5d069fc39c8b58980 100644
--- a/Source/WebKit/Shared/WebKeyboardEvent.h
+++ b/Source/WebKit/Shared/WebKeyboardEvent.h
@@ -42,14 +42,18 @@ public:
 
 #if USE(APPKIT)
     WebKeyboardEvent(WebEvent&&, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, int macCharCode, bool handledByInputMethod, const Vector<WebCore::KeypressCommand>&, bool isAutoRepeat, bool isKeypad, bool isSystemKey);
+    WebKeyboardEvent(WebEventType, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier>, MonotonicTime timestamp, Vector<WebCore::KeypressCommand>&& commands);
 #elif PLATFORM(GTK)
     WebKeyboardEvent(WebEvent&&, const String& text, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool handledByInputMethod, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<EditingRange>&&, Vector<String>&& commands, bool isAutoRepeat, bool isKeypad);
+    WebKeyboardEvent(WebEventType, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier>, MonotonicTime timestamp, Vector<String>&& commands);
 #elif PLATFORM(IOS_FAMILY)
     WebKeyboardEvent(WebEvent&&, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, int macCharCode, bool handledByInputMethod, bool isAutoRepeat, bool isKeypad, bool isSystemKey);
 #elif USE(LIBWPE) || ENABLE(WPE_PLATFORM)
     WebKeyboardEvent(WebEvent&&, const String& text, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool handledByInputMethod, std::optional<Vector<WebCore::CompositionUnderline>>&&, std::optional<EditingRange>&&, bool isAutoRepeat, bool isKeypad);
+    WebKeyboardEvent(WebEventType, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier>, MonotonicTime timestamp);
 #else
     WebKeyboardEvent(WebEvent&&, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, int macCharCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey);
+    WebKeyboardEvent(WebEventType, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier>, MonotonicTime timestamp);
 #endif
 
     const String& text() const LIFETIME_BOUND { return m_text; }
@@ -93,6 +97,7 @@ public:
     static String keyCodeStringForGdkKeycode(unsigned);
     static String keyIdentifierForGdkKeyval(unsigned);
     static int windowsKeyCodeForGdkKeyval(unsigned);
+    static unsigned gdkKeyCodeForWindowsKeyCode(int);
     static String singleCharacterStringForGdkKeyval(unsigned);
 #endif
 
diff --git a/Source/WebKit/Shared/WebMouseEvent.h b/Source/WebKit/Shared/WebMouseEvent.h
index 3accf5c66062f746029665e4a9ef970418784df2..e16205860562432eedeb017d354cd0c948b0e036 100644
--- a/Source/WebKit/Shared/WebMouseEvent.h
+++ b/Source/WebKit/Shared/WebMouseEvent.h
@@ -72,6 +72,7 @@ public:
 
     WebMouseEventButton button() const { return m_button; }
     unsigned short buttons() const { return m_buttons; }
+    void playwrightSetButtons(unsigned short buttons) { m_buttons = buttons; }
     const WebCore::DoublePoint& position() const { return m_position; } // Relative to the view.
     void setPosition(const WebCore::DoublePoint& position) { m_position = position; }
     const WebCore::DoublePoint& globalPosition() const LIFETIME_BOUND { return m_globalPosition; }
diff --git a/Source/WebKit/Shared/WebPageCreationParameters.h b/Source/WebKit/Shared/WebPageCreationParameters.h
index d0e04502450eedf0dc1e6104f10fe122edee992e..aaa5dfced49e1f20cbd02da81364dbf0285a04d9 100644
--- a/Source/WebKit/Shared/WebPageCreationParameters.h
+++ b/Source/WebKit/Shared/WebPageCreationParameters.h
@@ -317,6 +317,9 @@ struct WebPageCreationParameters {
     WebCore::ShouldRelaxThirdPartyCookieBlocking shouldRelaxThirdPartyCookieBlocking { WebCore::ShouldRelaxThirdPartyCookieBlocking::No };
     
     bool httpsUpgradeEnabled { true };
+
+    std::optional<int> deviceOrientationOverride { };
+    bool shouldPauseInInspectorWhenShown { false };
     
 #if ENABLE(APP_HIGHLIGHTS)
     WebCore::HighlightVisibility appHighlightsVisible { WebCore::HighlightVisibility::Hidden };
diff --git a/Source/WebKit/Shared/WebPageCreationParameters.serialization.in b/Source/WebKit/Shared/WebPageCreationParameters.serialization.in
index 707a31d075afd590890fb3e0054f256b4a567ac1..55ac3de3488b82b77888101d6677fb76c1b1c00c 100644
--- a/Source/WebKit/Shared/WebPageCreationParameters.serialization.in
+++ b/Source/WebKit/Shared/WebPageCreationParameters.serialization.in
@@ -233,6 +233,9 @@ enum class WebCore::UserInterfaceLayoutDirection : bool;
 
     bool httpsUpgradeEnabled;
 
+    std::optional<int> deviceOrientationOverride;
+    bool shouldPauseInInspectorWhenShown;
+
 #if ENABLE(APP_HIGHLIGHTS)
     WebCore::HighlightVisibility appHighlightsVisible;
 #endif
diff --git a/Source/WebKit/Shared/glib/ProcessExecutablePathGLib.cpp b/Source/WebKit/Shared/glib/ProcessExecutablePathGLib.cpp
index 64bcde96dfe76998f6ed6297be892c6548123049..be05d2e4f6749ef60a13e2c8cf77e3fa6ffd41f7 100644
--- a/Source/WebKit/Shared/glib/ProcessExecutablePathGLib.cpp
+++ b/Source/WebKit/Shared/glib/ProcessExecutablePathGLib.cpp
@@ -32,7 +32,7 @@
 
 namespace WebKit {
 
-#if ENABLE(DEVELOPER_MODE)
+#if TRUE
 static String getExecutablePath()
 {
     CString executablePath = FileSystem::currentExecutablePath();
@@ -44,7 +44,7 @@ static String getExecutablePath()
 
 static String findWebKitProcess(const ASCIILiteral processName)
 {
-#if ENABLE(DEVELOPER_MODE)
+#if TRUE
     static const char* execDirectory = g_getenv("WEBKIT_EXEC_PATH");
     if (execDirectory) {
         String processPath = FileSystem::pathByAppendingComponent(FileSystem::stringFromFileSystemRepresentation(execDirectory), processName);
diff --git a/Source/WebKit/Shared/gtk/NativeWebKeyboardEventGtk.cpp b/Source/WebKit/Shared/gtk/NativeWebKeyboardEventGtk.cpp
index 6091f843195ae84a25e955304170d84df8ec012e..6c8ce488b96ffeee50371925df704accf03e154c 100644
--- a/Source/WebKit/Shared/gtk/NativeWebKeyboardEventGtk.cpp
+++ b/Source/WebKit/Shared/gtk/NativeWebKeyboardEventGtk.cpp
@@ -51,7 +51,7 @@ NativeWebKeyboardEvent::NativeWebKeyboardEvent(const String& text, std::optional
 }
 
 NativeWebKeyboardEvent::NativeWebKeyboardEvent(WebEventType type, const String& text, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, Vector<String>&& commands, bool isAutoRepeat, bool isKeypad, OptionSet<WebEventModifier> modifiers)
-    : WebKeyboardEvent(WebEvent(type, modifiers, MonotonicTime::now()), text, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, false, std::nullopt, std::nullopt, WTF::move(commands), isAutoRepeat, isKeypad)
+    : WebKeyboardEvent(WebEvent(type, modifiers, MonotonicTime::now()), text, key, code, keyIdentifier, windowsVirtualKeyCode, nativeVirtualKeyCode, false, std::nullopt, std::nullopt, WTF::move(commands), false, isKeypad)
 {
 }
 
diff --git a/Source/WebKit/Shared/gtk/WebKeyboardEventGtk.cpp b/Source/WebKit/Shared/gtk/WebKeyboardEventGtk.cpp
index 092d3c2f493aa18e09f43db2d153d5aa6822e000..65d577e344637c99885b373500d353c1abbd6aea 100644
--- a/Source/WebKit/Shared/gtk/WebKeyboardEventGtk.cpp
+++ b/Source/WebKit/Shared/gtk/WebKeyboardEventGtk.cpp
@@ -1328,4 +1328,244 @@ String WebKeyboardEvent::singleCharacterStringForGdkKeyval(unsigned keyval)
     }
 }
 
+static const UncheckedKeyHashMap<int, unsigned>& gdkToWindowsKeyCodeMap()
+{
+    static UncheckedKeyHashMap<int, unsigned>* result;
+    static std::once_flag once;
+    std::call_once(
+        once,
+        [] {
+            const unsigned gdkKeyCodes[] = {
+                GDK_KEY_Cancel,
+                // FIXME: non-keypad keys should take precedence, so we skip GDK_KEY_KP_*
+                // GDK_KEY_KP_0,
+                // GDK_KEY_KP_1,
+                // GDK_KEY_KP_2,
+                // GDK_KEY_KP_3,
+                // GDK_KEY_KP_4,
+                // GDK_KEY_KP_5,
+                // GDK_KEY_KP_6,
+                // GDK_KEY_KP_7,
+                // GDK_KEY_KP_8,
+                // GDK_KEY_KP_9,
+                // GDK_KEY_KP_Multiply,
+                // GDK_KEY_KP_Add,
+                // GDK_KEY_KP_Subtract,
+                // GDK_KEY_KP_Decimal,
+                // GDK_KEY_KP_Divide,
+                // GDK_KEY_KP_Page_Up,
+                // GDK_KEY_KP_Page_Down,
+                // GDK_KEY_KP_End,
+                // GDK_KEY_KP_Home,
+                // GDK_KEY_KP_Left,
+                // GDK_KEY_KP_Up,
+                // GDK_KEY_KP_Right,
+                // GDK_KEY_KP_Down,
+                GDK_KEY_BackSpace,
+                // GDK_KEY_ISO_Left_Tab,
+                // GDK_KEY_3270_BackTab,
+                GDK_KEY_Tab,
+                GDK_KEY_Clear,
+                // GDK_KEY_ISO_Enter,
+                // GDK_KEY_KP_Enter,
+                GDK_KEY_Return,
+                GDK_KEY_Menu,
+                GDK_KEY_Pause,
+                GDK_KEY_AudioPause,
+                GDK_KEY_Caps_Lock,
+                GDK_KEY_Kana_Lock,
+                GDK_KEY_Kana_Shift,
+                GDK_KEY_Hangul,
+                GDK_KEY_Hangul_Hanja,
+                GDK_KEY_Kanji,
+                GDK_KEY_Escape,
+                GDK_KEY_space,
+                GDK_KEY_Page_Up,
+                GDK_KEY_Page_Down,
+                GDK_KEY_End,
+                GDK_KEY_Home,
+                GDK_KEY_Left,
+                GDK_KEY_Up,
+                GDK_KEY_Right,
+                GDK_KEY_Down,
+                GDK_KEY_Select,
+                GDK_KEY_Print,
+                GDK_KEY_Execute,
+                GDK_KEY_Insert,
+                GDK_KEY_KP_Insert,
+                GDK_KEY_Delete,
+                GDK_KEY_KP_Delete,
+                GDK_KEY_Help,
+                GDK_KEY_0,
+                GDK_KEY_parenright,
+                GDK_KEY_1,
+                GDK_KEY_exclam,
+                GDK_KEY_2,
+                GDK_KEY_at,
+                GDK_KEY_3,
+                GDK_KEY_numbersign,
+                GDK_KEY_4,
+                GDK_KEY_dollar,
+                GDK_KEY_5,
+                GDK_KEY_percent,
+                GDK_KEY_6,
+                GDK_KEY_asciicircum,
+                GDK_KEY_7,
+                GDK_KEY_ampersand,
+                GDK_KEY_8,
+                GDK_KEY_asterisk,
+                GDK_KEY_9,
+                GDK_KEY_parenleft,
+                GDK_KEY_a,
+                GDK_KEY_A,
+                GDK_KEY_b,
+                GDK_KEY_B,
+                GDK_KEY_c,
+                GDK_KEY_C,
+                GDK_KEY_d,
+                GDK_KEY_D,
+                GDK_KEY_e,
+                GDK_KEY_E,
+                GDK_KEY_f,
+                GDK_KEY_F,
+                GDK_KEY_g,
+                GDK_KEY_G,
+                GDK_KEY_h,
+                GDK_KEY_H,
+                GDK_KEY_i,
+                GDK_KEY_I,
+                GDK_KEY_j,
+                GDK_KEY_J,
+                GDK_KEY_k,
+                GDK_KEY_K,
+                GDK_KEY_l,
+                GDK_KEY_L,
+                GDK_KEY_m,
+                GDK_KEY_M,
+                GDK_KEY_n,
+                GDK_KEY_N,
+                GDK_KEY_o,
+                GDK_KEY_O,
+                GDK_KEY_p,
+                GDK_KEY_P,
+                GDK_KEY_q,
+                GDK_KEY_Q,
+                GDK_KEY_r,
+                GDK_KEY_R,
+                GDK_KEY_s,
+                GDK_KEY_S,
+                GDK_KEY_t,
+                GDK_KEY_T,
+                GDK_KEY_u,
+                GDK_KEY_U,
+                GDK_KEY_v,
+                GDK_KEY_V,
+                GDK_KEY_w,
+                GDK_KEY_W,
+                GDK_KEY_x,
+                GDK_KEY_X,
+                GDK_KEY_y,
+                GDK_KEY_Y,
+                GDK_KEY_z,
+                GDK_KEY_Z,
+                GDK_KEY_Meta_L,
+                GDK_KEY_Meta_R,
+                GDK_KEY_Sleep,
+                GDK_KEY_Num_Lock,
+                GDK_KEY_Scroll_Lock,
+                GDK_KEY_Shift_L,
+                GDK_KEY_Shift_R,
+                GDK_KEY_Control_L,
+                GDK_KEY_Control_R,
+                GDK_KEY_Alt_L,
+                GDK_KEY_Alt_R,
+                GDK_KEY_Back,
+                GDK_KEY_Forward,
+                GDK_KEY_Refresh,
+                GDK_KEY_Stop,
+                GDK_KEY_Search,
+                GDK_KEY_Favorites,
+                GDK_KEY_HomePage,
+                GDK_KEY_AudioMute,
+                GDK_KEY_AudioLowerVolume,
+                GDK_KEY_AudioRaiseVolume,
+                GDK_KEY_AudioNext,
+                GDK_KEY_AudioPrev,
+                GDK_KEY_AudioStop,
+                GDK_KEY_AudioMedia,
+                GDK_KEY_semicolon,
+                GDK_KEY_colon,
+                GDK_KEY_plus,
+                GDK_KEY_equal,
+                GDK_KEY_comma,
+                GDK_KEY_less,
+                GDK_KEY_minus,
+                GDK_KEY_underscore,
+                GDK_KEY_period,
+                GDK_KEY_greater,
+                GDK_KEY_slash,
+                GDK_KEY_question,
+                GDK_KEY_asciitilde,
+                GDK_KEY_quoteleft,
+                GDK_KEY_bracketleft,
+                GDK_KEY_braceleft,
+                GDK_KEY_backslash,
+                GDK_KEY_bar,
+                GDK_KEY_bracketright,
+                GDK_KEY_braceright,
+                GDK_KEY_quoteright,
+                GDK_KEY_quotedbl,
+                GDK_KEY_AudioRewind,
+                GDK_KEY_AudioForward,
+                GDK_KEY_AudioPlay,
+                GDK_KEY_F1,
+                GDK_KEY_F2,
+                GDK_KEY_F3,
+                GDK_KEY_F4,
+                GDK_KEY_F5,
+                GDK_KEY_F6,
+                GDK_KEY_F7,
+                GDK_KEY_F8,
+                GDK_KEY_F9,
+                GDK_KEY_F10,
+                GDK_KEY_F11,
+                GDK_KEY_F12,
+                GDK_KEY_F13,
+                GDK_KEY_F14,
+                GDK_KEY_F15,
+                GDK_KEY_F16,
+                GDK_KEY_F17,
+                GDK_KEY_F18,
+                GDK_KEY_F19,
+                GDK_KEY_F20,
+                GDK_KEY_F21,
+                GDK_KEY_F22,
+                GDK_KEY_F23,
+                GDK_KEY_F24,
+                GDK_KEY_VoidSymbol,
+                GDK_KEY_Red,
+                GDK_KEY_Green,
+                GDK_KEY_Yellow,
+                GDK_KEY_Blue,
+                GDK_KEY_PowerOff,
+                GDK_KEY_AudioRecord,
+                GDK_KEY_Display,
+                GDK_KEY_Subtitle,
+                GDK_KEY_Video
+            };
+            result = new UncheckedKeyHashMap<int, unsigned>();
+            for (unsigned gdkKeyCode : gdkKeyCodes) {
+                int winKeyCode = WebKeyboardEvent::windowsKeyCodeForGdkKeyval(gdkKeyCode);
+                // If several gdk key codes map to the same win key code first one is used.
+                result->add(winKeyCode, gdkKeyCode);
+            }
+        });
+    return *result;
+}
+
+unsigned WebKeyboardEvent::gdkKeyCodeForWindowsKeyCode(int keycode)
+{
+    return gdkToWindowsKeyCodeMap().get(keycode);
+}
+
 } // namespace WebKit
diff --git a/Source/WebKit/Shared/unix/AuxiliaryProcessMain.cpp b/Source/WebKit/Shared/unix/AuxiliaryProcessMain.cpp
index 7d054a56b04d1b19f12e6463077bccb67adcad25..bab6718c22da62179df92dcead696c7610cb4a9d 100644
--- a/Source/WebKit/Shared/unix/AuxiliaryProcessMain.cpp
+++ b/Source/WebKit/Shared/unix/AuxiliaryProcessMain.cpp
@@ -51,6 +51,15 @@ __attribute__((weak)) extern "C" int __llvm_profile_dump(void);
 
 namespace WebKit {
 
+static bool hasArgument(const char* argument, int argc, char** argv)
+{
+    for (int i = 0; i < argc; ++i) {
+        if (!strcmp(argument, argv[i]))
+            return true;
+    }
+    return false;
+}
+
 AuxiliaryProcessMainCommon::AuxiliaryProcessMainCommon()
 {
 #if ENABLE(BREAKPAD)
@@ -91,6 +100,10 @@ bool AuxiliaryProcessMainCommon::parseCommandLine(int argc, char** argv)
     }
 #endif
 
+// Playwright begin
+    if (hasArgument("--enable-shared-array-buffer", argc, argv))
+        m_parameters.shouldEnableSharedArrayBuffer = true;
+// Playwright end
     return true;
 }
 
diff --git a/Source/WebKit/Shared/win/AuxiliaryProcessMainWin.cpp b/Source/WebKit/Shared/win/AuxiliaryProcessMainWin.cpp
index b321d93d23d0d1862385b022569dc65323e8691c..ba3bcc9bc20b9512b9288cb2d7e5a3d8b90a0e37 100644
--- a/Source/WebKit/Shared/win/AuxiliaryProcessMainWin.cpp
+++ b/Source/WebKit/Shared/win/AuxiliaryProcessMainWin.cpp
@@ -47,6 +47,10 @@ bool AuxiliaryProcessMainCommon::parseCommandLine(int argc, char** argv)
             m_parameters.connectionIdentifier = IPC::Connection::Identifier { reinterpret_cast<HANDLE>(parseIntegerAllowingTrailingJunk<uint64_t>(StringView::fromLatin1(argv[++i])).value_or(0)) };
         else if (!strcmp(argv[i], "-processIdentifier") && i + 1 < argc)
             m_parameters.processIdentifier = ObjectIdentifier<WebCore::ProcessIdentifierType>(parseIntegerAllowingTrailingJunk<uint64_t>(StringView::fromLatin1(argv[++i])).value_or(0));
+// Playwright begin
+        else if (!strcmp(argv[i], "-enable-shared-array-buffer"))
+            m_parameters.shouldEnableSharedArrayBuffer = true;
+// Playwright end
         else if (!strcmp(argv[i], "-configure-jsc-for-testing"))
             JSC::Config::configureForTesting();
         else if (!strcmp(argv[i], "-disable-jit"))
diff --git a/Source/WebKit/Sources.txt b/Source/WebKit/Sources.txt
index 382ea8985d8781d7d49f12a90bf0ecc65232985f..ebe6f275fed47f09490052f0548641b1dec4b8f4 100644
--- a/Source/WebKit/Sources.txt
+++ b/Source/WebKit/Sources.txt
@@ -403,6 +403,7 @@ UIProcess/AboutSchemeHandler.cpp
 UIProcess/AuxiliaryProcessProxy.cpp
 UIProcess/BackgroundProcessResponsivenessTimer.cpp
 UIProcess/BrowsingContextGroup.cpp
+UIProcess/BrowserInspectorPipe.cpp
 UIProcess/DeviceIdHashSaltStorage.cpp
 UIProcess/DisplayLink.cpp
 UIProcess/DisplayLinkProcessProxyClient.cpp
@@ -414,17 +415,21 @@ UIProcess/FrameLoadState.cpp
 UIProcess/FrameProcess.cpp
 UIProcess/GeolocationPermissionRequestManagerProxy.cpp
 UIProcess/GeolocationPermissionRequestProxy.cpp
+UIProcess/InspectorDialogAgent.cpp
+UIProcess/InspectorPlaywrightAgent.cpp
 UIProcess/LegacyGlobalSettings.cpp
 UIProcess/MediaKeySystemPermissionRequestManagerProxy.cpp
 UIProcess/MediaKeySystemPermissionRequestProxy.cpp
 UIProcess/OverrideLanguages.cpp
 UIProcess/PageClient.cpp
 UIProcess/PageLoadState.cpp
+UIProcess/PlaywrightFullScreenManagerProxyClient.cpp
 UIProcess/ProcessActivityGroup.cpp
 UIProcess/ProcessAssertion.cpp
 UIProcess/ProcessThrottler.cpp
 UIProcess/ProvisionalFrameProxy.cpp
 UIProcess/ProvisionalPageProxy.cpp
+UIProcess/RemoteInspectorPipe.cpp
 UIProcess/RemotePageDrawingAreaProxy.cpp
 UIProcess/RemotePageFullscreenManagerProxy.cpp
 UIProcess/RemotePagePlaybackSessionManagerProxy.cpp
@@ -472,6 +477,8 @@ UIProcess/WebOpenPanelResultListenerProxy.cpp
 UIProcess/WebPageDiagnosticLoggingClient.cpp
 UIProcess/WebPageGroup.cpp
 UIProcess/WebPageInjectedBundleClient.cpp
+UIProcess/WebPageInspectorEmulationAgent.cpp
+UIProcess/WebPageInspectorInputAgent.cpp
 UIProcess/WebPageProxy.cpp
 UIProcess/WebPageProxyMessageReceiverRegistration.cpp
 UIProcess/WebPageProxyTesting.cpp
@@ -641,6 +648,7 @@ UIProcess/Inspector/WebPageDebuggable.cpp
 UIProcess/Inspector/WebPageInspectorController.cpp
 
 UIProcess/Inspector/Agents/InspectorBrowserAgent.cpp
+UIProcess/Inspector/Agents/InspectorScreencastAgent.cpp
 
 UIProcess/Media/AudioSessionRoutingArbitratorProxy.cpp
 UIProcess/Media/MediaUsageManager.cpp
diff --git a/Source/WebKit/SourcesCocoa.txt b/Source/WebKit/SourcesCocoa.txt
index 8f5e05d7905c09452701a390277d8528d3c53170..3ac17db7930b41d33d7e0f6ee9564b997967a8a6 100644
--- a/Source/WebKit/SourcesCocoa.txt
+++ b/Source/WebKit/SourcesCocoa.txt
@@ -286,6 +286,7 @@ UIProcess/API/Cocoa/_WKArchiveExclusionRule.mm @nonARC
 UIProcess/API/Cocoa/_WKAttachment.mm @nonARC
 UIProcess/API/Cocoa/_WKAutomationSession.mm @nonARC
 UIProcess/API/Cocoa/_WKAutomationSessionConfiguration.mm @nonARC
+UIProcess/API/Cocoa/_WKBrowserInspector.mm @nonARC
 UIProcess/API/Cocoa/_WKContentRuleListAction.mm @nonARC
 UIProcess/API/Cocoa/_WKContextMenuElementInfo.mm @nonARC
 UIProcess/API/Cocoa/_WKCustomHeaderFields.mm @nonARC @no-unify
diff --git a/Source/WebKit/SourcesGTK.txt b/Source/WebKit/SourcesGTK.txt
index 4b68f079d9d43d1b0bef8e3b31cd0d6f3a730ae9..3799718e6e5791791335171a8adb0365231501bf 100644
--- a/Source/WebKit/SourcesGTK.txt
+++ b/Source/WebKit/SourcesGTK.txt
@@ -134,6 +134,7 @@ UIProcess/API/glib/WebKitAutomationSession.cpp @no-unify
 UIProcess/API/glib/WebKitBackForwardList.cpp @no-unify
 UIProcess/API/glib/WebKitBackForwardListItem.cpp @no-unify
 UIProcess/API/glib/WebKitClipboardPermissionRequest.cpp @no-unify
+UIProcess/API/glib/WebKitBrowserInspector.cpp @no-unify
 UIProcess/API/glib/WebKitContextMenuClient.cpp @no-unify
 UIProcess/API/glib/WebKitCookieManager.cpp @no-unify
 UIProcess/API/glib/WebKitCredential.cpp @no-unify
@@ -263,6 +264,7 @@ UIProcess/linux/MemoryPressureMonitor.cpp
 UIProcess/WebsiteData/glib/WebsiteDataStoreGLib.cpp
 UIProcess/WebsiteData/soup/WebsiteDataStoreSoup.cpp
 
+UIProcess/glib/BrowserInspectorWebSocketServer.cpp
 UIProcess/glib/DRMMainDevice.cpp @no-unify
 UIProcess/glib/DisplayLinkGLib.cpp
 UIProcess/glib/DisplayVBlankMonitor.cpp
@@ -270,6 +272,7 @@ UIProcess/glib/DisplayVBlankMonitorDRM.cpp
 UIProcess/glib/DisplayVBlankMonitorThreaded.cpp
 UIProcess/glib/DisplayVBlankMonitorTimer.cpp
 UIProcess/glib/FenceMonitor.cpp
+UIProcess/glib/InspectorPlaywrightAgentClientGLib.cpp
 UIProcess/glib/ScreenManager.cpp
 UIProcess/glib/SystemSettingsManagerProxy.cpp
 UIProcess/glib/WebPageProxyGLib.cpp
@@ -287,9 +290,9 @@ UIProcess/gtk/DisplayX11.cpp @no-unify
 UIProcess/gtk/DisplayWayland.cpp @no-unify
 UIProcess/gtk/GRefPtrGtk.cpp @no-unify
 UIProcess/gtk/GtkUtilities.cpp @no-unify
-UIProcess/gtk/WebDateTimePickerGtk.cpp
 UIProcess/gtk/HardwareAccelerationManager.cpp
 UIProcess/gtk/KeyBindingTranslator.cpp
+UIProcess/gtk/PageInspectorTargetProxyGtk.cpp
 UIProcess/gtk/PointerLockManager.cpp @no-unify
 UIProcess/gtk/PointerLockManagerWayland.cpp @no-unify
 UIProcess/gtk/PointerLockManagerX11.cpp @no-unify
@@ -303,6 +306,9 @@ UIProcess/gtk/ViewGestureControllerGtk.cpp
 UIProcess/gtk/WebColorPickerGtk.cpp
 UIProcess/gtk/WebContextMenuProxyGtk.cpp
 UIProcess/gtk/WebDataListSuggestionsDropdownGtk.cpp
+UIProcess/gtk/WebDateTimePickerGtk.cpp
+UIProcess/gtk/WebPageInspectorEmulationAgentGtk.cpp
+UIProcess/gtk/WebPageInspectorInputAgentGtk.cpp
 UIProcess/gtk/WebPageProxyGtk.cpp @no-unify
 UIProcess/gtk/WebPasteboardProxyGtk.cpp
 UIProcess/gtk/WebPopupMenuProxyGtk.cpp
diff --git a/Source/WebKit/SourcesWPE.txt b/Source/WebKit/SourcesWPE.txt
index 3d1ed6156127f02614905e30835fa4c6334ae914..fb362b66d00c2081d6eb5380fb2bd7967223f489 100644
--- a/Source/WebKit/SourcesWPE.txt
+++ b/Source/WebKit/SourcesWPE.txt
@@ -138,6 +138,7 @@ UIProcess/API/glib/WebKitAuthenticationRequest.cpp @no-unify
 UIProcess/API/glib/WebKitAutomationSession.cpp @no-unify
 UIProcess/API/glib/WebKitBackForwardList.cpp @no-unify
 UIProcess/API/glib/WebKitBackForwardListItem.cpp @no-unify
+UIProcess/API/glib/WebKitBrowserInspector.cpp @no-unify
 UIProcess/API/glib/WebKitContextMenuClient.cpp @no-unify
 UIProcess/API/glib/WebKitCookieManager.cpp @no-unify
 UIProcess/API/glib/WebKitCredential.cpp @no-unify
@@ -174,6 +175,7 @@ UIProcess/API/glib/WebKitOptionMenu.cpp @no-unify
 UIProcess/API/glib/WebKitOptionMenuItem.cpp @no-unify
 UIProcess/API/glib/WebKitPermissionRequest.cpp @no-unify
 UIProcess/API/glib/WebKitPermissionStateQuery.cpp @no-unify
+UIProcess/API/glib/WebKitPointerLockPermissionRequest.cpp @no-unify
 UIProcess/API/glib/WebKitPolicyDecision.cpp @no-unify
 UIProcess/API/glib/WebKitPrivate.cpp @no-unify
 UIProcess/API/glib/WebKitProtocolHandler.cpp @no-unify
@@ -242,6 +244,7 @@ UIProcess/Gamepad/wpe/PlatformGamepadWPE.cpp
 
 UIProcess/geoclue/GeoclueGeolocationProvider.cpp
 
+UIProcess/glib/BrowserInspectorWebSocketServer.cpp
 UIProcess/glib/DRMMainDevice.cpp @no-unify
 UIProcess/glib/DisplayLinkGLib.cpp
 UIProcess/glib/DisplayVBlankMonitor.cpp
@@ -249,6 +252,7 @@ UIProcess/glib/DisplayVBlankMonitorDRM.cpp
 UIProcess/glib/DisplayVBlankMonitorThreaded.cpp
 UIProcess/glib/DisplayVBlankMonitorTimer.cpp
 UIProcess/glib/FenceMonitor.cpp
+UIProcess/glib/InspectorPlaywrightAgentClientGLib.cpp
 UIProcess/glib/ScreenManager.cpp
 UIProcess/glib/SystemSettingsManagerProxy.cpp
 UIProcess/glib/WebPageProxyGLib.cpp
@@ -284,9 +288,15 @@ UIProcess/soup/WebProcessPoolSoup.cpp
 
 UIProcess/wpe/AcceleratedBackingStore.cpp
 UIProcess/wpe/DisplayVBlankMonitorWPE.cpp
+UIProcess/wpe/PageInspectorTargetProxyWPE.cpp
 UIProcess/wpe/ScreenManagerWPE.cpp
 UIProcess/wpe/SystemSettingsManagerProxyWPE.cpp
 UIProcess/wpe/WPEUtilities.cpp
+UIProcess/wpe/WebColorPickerWPE.cpp
+UIProcess/wpe/WebDataListSuggestionsDropdownWPE.cpp
+UIProcess/wpe/WebDateTimePickerWPE.cpp
+UIProcess/wpe/WebPageInspectorEmulationAgentWPE.cpp
+UIProcess/wpe/WebPageInspectorInputAgentWPE.cpp
 UIProcess/wpe/WebPageProxyWPE.cpp
 UIProcess/wpe/WebPasteboardProxyWPE.cpp
 UIProcess/wpe/WebPreferencesWPE.cpp
diff --git a/Source/WebKit/UIProcess/API/APIPageConfiguration.cpp b/Source/WebKit/UIProcess/API/APIPageConfiguration.cpp
index 367ad615c527a09f3c3d3d86bf7eca87afbc13ed..9ef85591e159555c93e5b7a9635d5e289c22a243 100644
--- a/Source/WebKit/UIProcess/API/APIPageConfiguration.cpp
+++ b/Source/WebKit/UIProcess/API/APIPageConfiguration.cpp
@@ -261,6 +261,11 @@ BrowsingContextGroup* PageConfiguration::preferredBrowsingContextGroup() const
     return nullptr;
 }
 
+WebKit::WebPageProxy* PageConfiguration::openerPageForInspector() const
+{
+    return m_data.openerPageForInspector.get();
+}
+
 WebPageProxy* PageConfiguration::pageToCloneSessionStorageFrom() const
 {
     return m_data.pageToCloneSessionStorageFrom.get();
diff --git a/Source/WebKit/UIProcess/API/APIPageConfiguration.h b/Source/WebKit/UIProcess/API/APIPageConfiguration.h
index b2227e338dcd10bfdaaf1a4c4d632003cf9e6f73..3afcd9c4f12d7cf755f9b849da7dfb98812afdf7 100644
--- a/Source/WebKit/UIProcess/API/APIPageConfiguration.h
+++ b/Source/WebKit/UIProcess/API/APIPageConfiguration.h
@@ -173,6 +173,10 @@ public:
     WebKit::WebPageProxy* NODELETE relatedPage() const;
     void setRelatedPage(WeakPtr<WebKit::WebPageProxy>&& relatedPage) { m_data.relatedPage = WTF::move(relatedPage); }
 
+    // This is similar to relatedPage(), but it is also set for noopener links.
+    WebKit::WebPageProxy* openerPageForInspector() const;
+    void setOpenerPageForInspector(WeakPtr<WebKit::WebPageProxy>&& openerPageForInspector) { m_data.openerPageForInspector = WTF::move(openerPageForInspector); }
+
     WebKit::WebPageProxy* NODELETE pageToCloneSessionStorageFrom() const;
     void NODELETE setPageToCloneSessionStorageFrom(WeakPtr<WebKit::WebPageProxy>&&);
 
@@ -540,6 +544,7 @@ private:
 #endif
         RefPtr<WebKit::WebPageGroup> pageGroup;
         WeakPtr<WebKit::WebPageProxy> relatedPage;
+        WeakPtr<WebKit::WebPageProxy> openerPageForInspector;
         Box<std::optional<OpenerInfo>> openerInfo;
         WebCore::Site openedSite;
         bool processInheritedFromOpener { false };
diff --git a/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.cpp b/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.cpp
index 182dacc96abaab8d5fc9be0658dd1683f48af4db..80d6939f779a5d9a46e1a916cafef718faab9326 100644
--- a/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.cpp
+++ b/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.cpp
@@ -56,6 +56,10 @@ Ref<ProcessPoolConfiguration> ProcessPoolConfiguration::copy()
     copy->m_ignoreSynchronousMessagingTimeoutsForTesting = this->m_ignoreSynchronousMessagingTimeoutsForTesting;
     copy->m_attrStyleEnabled = this->m_attrStyleEnabled;
     copy->m_shouldThrowExceptionForGlobalConstantRedeclaration = this->m_shouldThrowExceptionForGlobalConstantRedeclaration;
+#if PLATFORM(MAC)
+    copy->m_forceOverlayScrollbars = this->m_forceOverlayScrollbars;
+#endif
+    copy->m_overrideLanguages = this->m_overrideLanguages; /* playwright revert fb205fb */
     copy->m_alwaysRunsAtBackgroundPriority = this->m_alwaysRunsAtBackgroundPriority;
     copy->m_shouldTakeUIBackgroundAssertion = this->m_shouldTakeUIBackgroundAssertion;
     copy->m_shouldCaptureDisplayInUIProcess = this->m_shouldCaptureDisplayInUIProcess;
diff --git a/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.h b/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.h
index 2b0e5565fd123126f1c6db65059975a344f152df..99b237e2736cd1b5c0e93dfcef5c81ab29ea74c1 100644
--- a/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.h
+++ b/Source/WebKit/UIProcess/API/APIProcessPoolConfiguration.h
@@ -49,7 +49,7 @@ public:
 
     explicit ProcessPoolConfiguration();
     virtual ~ProcessPoolConfiguration();
-    
+
     Ref<ProcessPoolConfiguration> copy();
 
     bool usesSingleWebProcess() const { return m_usesSingleWebProcess; }
@@ -93,10 +93,20 @@ public:
 
     bool attrStyleEnabled() const { return m_attrStyleEnabled; }
     void setAttrStyleEnabled(bool enabled) { m_attrStyleEnabled = enabled; }
-    
+
     bool shouldThrowExceptionForGlobalConstantRedeclaration() const { return m_shouldThrowExceptionForGlobalConstantRedeclaration; }
     void setShouldThrowExceptionForGlobalConstantRedeclaration(bool shouldThrow) { m_shouldThrowExceptionForGlobalConstantRedeclaration = shouldThrow; }
-    
+
+#if PLATFORM(MAC)
+    bool forceOverlayScrollbars() const { return m_forceOverlayScrollbars; }
+    void setForceOverlayScrollbars(bool forceOverlayScrollbars) { m_forceOverlayScrollbars = forceOverlayScrollbars; }
+#endif
+
+    /* playwright revert fb205fb */
+    const Vector<WTF::String>& overrideLanguages() const { return m_overrideLanguages; }
+    void setOverrideLanguages(Vector<WTF::String>&& languages) { m_overrideLanguages = WTF::move(languages); }
+    /* end playwright revert fb205fb */
+
     bool alwaysRunsAtBackgroundPriority() const { return m_alwaysRunsAtBackgroundPriority; }
     void setAlwaysRunsAtBackgroundPriority(bool alwaysRunsAtBackgroundPriority) { m_alwaysRunsAtBackgroundPriority = alwaysRunsAtBackgroundPriority; }
 
@@ -177,6 +187,10 @@ private:
     bool m_ignoreSynchronousMessagingTimeoutsForTesting { false };
     bool m_attrStyleEnabled { false };
     bool m_shouldThrowExceptionForGlobalConstantRedeclaration { true };
+#if PLATFORM(MAC)
+    bool m_forceOverlayScrollbars { false };
+#endif
+    Vector<WTF::String> m_overrideLanguages; /* playwright revert fb205fb */
     bool m_alwaysRunsAtBackgroundPriority { false };
     bool m_shouldTakeUIBackgroundAssertion { true };
     bool m_shouldCaptureDisplayInUIProcess { DEFAULT_CAPTURE_DISPLAY_IN_UI_PROCESS };
diff --git a/Source/WebKit/UIProcess/API/APIUIClient.h b/Source/WebKit/UIProcess/API/APIUIClient.h
index d9f80360027a2e0c9dd5a3594189dddfde53966d..c6862db4346514707fb84427123fb4ce568ffc99 100644
--- a/Source/WebKit/UIProcess/API/APIUIClient.h
+++ b/Source/WebKit/UIProcess/API/APIUIClient.h
@@ -115,6 +115,7 @@ public:
     virtual void runJavaScriptAlert(WebKit::WebPageProxy&, const WTF::String&, WebKit::WebFrameProxy*, WebKit::FrameInfoData&&, Function<void()>&& completionHandler) { completionHandler(); }
     virtual void runJavaScriptConfirm(WebKit::WebPageProxy&, const WTF::String&, WebKit::WebFrameProxy*, WebKit::FrameInfoData&&, Function<void(bool)>&& completionHandler) { completionHandler(false); }
     virtual void runJavaScriptPrompt(WebKit::WebPageProxy&, const WTF::String&, const WTF::String&, WebKit::WebFrameProxy*, WebKit::FrameInfoData&&, Function<void(const WTF::String&)>&& completionHandler) { completionHandler(WTF::String()); }
+    virtual void handleJavaScriptDialog(WebKit::WebPageProxy&, bool, const WTF::String&) { }
 
     virtual void setStatusText(WebKit::WebPageProxy*, const WTF::String&) { }
     virtual void mouseDidMoveOverElement(WebKit::WebPageProxy&, const WebKit::WebHitTestResultData&, OptionSet<WebKit::WebEventModifier>) { }
diff --git a/Source/WebKit/UIProcess/API/C/WKInspector.cpp b/Source/WebKit/UIProcess/API/C/WKInspector.cpp
index 5ae69462a4c5a61e098e4df7def6dec3c842e167..e04134e2d91bfc5b1832a7a641614483c748513a 100644
--- a/Source/WebKit/UIProcess/API/C/WKInspector.cpp
+++ b/Source/WebKit/UIProcess/API/C/WKInspector.cpp
@@ -28,6 +28,11 @@
 
 #if !PLATFORM(IOS_FAMILY)
 
+#if PLATFORM(WIN)
+#include "BrowserInspectorPipe.h"
+#include "InspectorPlaywrightAgentClientWin.h"
+#endif
+
 #include "WKAPICast.h"
 #include "WebFrameProxy.h"
 #include "WebInspectorUIProxy.h"
@@ -131,4 +136,11 @@ void WKInspectorToggleElementSelection(WKInspectorRef inspectorRef)
     protect(toImpl(inspectorRef))->toggleElementSelection();
 }
 
+void WKInspectorInitializeRemoteInspectorPipe(ConfigureDataStoreCallback configureDataStore, CreatePageCallback createPage, QuitCallback quit)
+{
+#if PLATFORM(WIN)
+    initializeBrowserInspectorPipe(makeUnique<InspectorPlaywrightAgentClientWin>(configureDataStore, createPage, quit));
+#endif
+}
+
 #endif // !PLATFORM(IOS_FAMILY)
diff --git a/Source/WebKit/UIProcess/API/C/WKInspector.h b/Source/WebKit/UIProcess/API/C/WKInspector.h
index 026121d114c5fcad84c1396be8d692625beaa3bd..edd6e5cae033124c589959a42522fde07a42fdf6 100644
--- a/Source/WebKit/UIProcess/API/C/WKInspector.h
+++ b/Source/WebKit/UIProcess/API/C/WKInspector.h
@@ -66,6 +66,10 @@ WK_EXPORT void WKInspectorTogglePageProfiling(WKInspectorRef inspector);
 WK_EXPORT bool WKInspectorIsElementSelectionActive(WKInspectorRef inspector);
 WK_EXPORT void WKInspectorToggleElementSelection(WKInspectorRef inspector);
 
+typedef void (*ConfigureDataStoreCallback)(WKWebsiteDataStoreRef dataStore);
+typedef WKPageRef (*CreatePageCallback)(WKPageConfigurationRef configuration);
+typedef void (*QuitCallback)();
+WK_EXPORT void WKInspectorInitializeRemoteInspectorPipe(ConfigureDataStoreCallback, CreatePageCallback, QuitCallback);
 #ifdef __cplusplus
 }
 #endif
diff --git a/Source/WebKit/UIProcess/API/C/WKPage.cpp b/Source/WebKit/UIProcess/API/C/WKPage.cpp
index 3ceafb8efa81d2ea5d6d5db862564e5d9549fd50..5aad4b41ff5975d2e4b499e407a41e3fe1983b90 100644
--- a/Source/WebKit/UIProcess/API/C/WKPage.cpp
+++ b/Source/WebKit/UIProcess/API/C/WKPage.cpp
@@ -1913,6 +1913,13 @@ void WKPageSetPageUIClient(WKPageRef pageRef, const WKPageUIClientBase* wkClient
             m_client.addMessageToConsole(toAPI(&page), toAPI(message.impl()), m_client.base.clientInfo);
         }
 
+        void handleJavaScriptDialog(WebPageProxy& page, bool accept, const String& value) final {
+            if (m_client.handleJavaScriptDialog) {
+                m_client.handleJavaScriptDialog(toAPI(&page), accept, toAPI(value.impl()), m_client.base.clientInfo);
+                return;
+            }
+        }
+
         void setStatusText(WebPageProxy* page, const String& text) final
         {
             if (!m_client.setStatusText)
@@ -1950,6 +1957,8 @@ void WKPageSetPageUIClient(WKPageRef pageRef, const WKPageUIClientBase* wkClient
         {
             if (!m_client.didNotHandleKeyEvent)
                 return;
+            if (!event.nativeEvent())
+                return;
             m_client.didNotHandleKeyEvent(toAPI(page), event.nativeEvent(), m_client.base.clientInfo);
         }
 
diff --git a/Source/WebKit/UIProcess/API/C/WKPageUIClient.h b/Source/WebKit/UIProcess/API/C/WKPageUIClient.h
index ae4a98c2fe5782eb2356dc8b6b486f6b44db6db3..62b2f3c351fe287af11c1ee2815f1fabe044d537 100644
--- a/Source/WebKit/UIProcess/API/C/WKPageUIClient.h
+++ b/Source/WebKit/UIProcess/API/C/WKPageUIClient.h
@@ -98,6 +98,7 @@ typedef void (*WKPageRunBeforeUnloadConfirmPanelCallback)(WKPageRef page, WKStri
 typedef void (*WKPageRunJavaScriptAlertCallback)(WKPageRef page, WKStringRef alertText, WKFrameRef frame, WKSecurityOriginRef securityOrigin, WKPageRunJavaScriptAlertResultListenerRef listener, const void *clientInfo);
 typedef void (*WKPageRunJavaScriptConfirmCallback)(WKPageRef page, WKStringRef message, WKFrameRef frame, WKSecurityOriginRef securityOrigin, WKPageRunJavaScriptConfirmResultListenerRef listener, const void *clientInfo);
 typedef void (*WKPageRunJavaScriptPromptCallback)(WKPageRef page, WKStringRef message, WKStringRef defaultValue, WKFrameRef frame, WKSecurityOriginRef securityOrigin, WKPageRunJavaScriptPromptResultListenerRef listener, const void *clientInfo);
+typedef void (*WKPageHandleJavaScriptDialogCallback)(WKPageRef page, bool accept, WKStringRef value, const void *clientInfo);
 typedef void (*WKPageRequestStorageAccessConfirmCallback)(WKPageRef page, WKFrameRef frame, WKStringRef requestingDomain, WKStringRef currentDomain, WKPageRequestStorageAccessConfirmResultListenerRef listener, const void *clientInfo);
 typedef void (*WKPageTakeFocusCallback)(WKPageRef page, WKFocusDirection direction, const void *clientInfo);
 typedef void (*WKPageFocusCallback)(WKPageRef page, const void *clientInfo);
@@ -1366,6 +1367,7 @@ typedef struct WKPageUIClientV14 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 } WKPageUIClientV14;
 
 typedef struct WKPageUIClientV15 {
@@ -1473,6 +1475,7 @@ typedef struct WKPageUIClientV15 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 
     // Version 15.
     WKPageDecidePolicyForSpeechRecognitionPermissionRequestCallback     decidePolicyForSpeechRecognitionPermissionRequest;
@@ -1584,6 +1587,7 @@ typedef struct WKPageUIClientV16 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 
     // Version 15.
     WKPageDecidePolicyForSpeechRecognitionPermissionRequestCallback     decidePolicyForSpeechRecognitionPermissionRequest;
@@ -1698,6 +1702,7 @@ typedef struct WKPageUIClientV17 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 
     // Version 15.
     WKPageDecidePolicyForSpeechRecognitionPermissionRequestCallback     decidePolicyForSpeechRecognitionPermissionRequest;
@@ -1812,6 +1817,7 @@ typedef struct WKPageUIClientV18 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 
     // Version 15.
     WKPageDecidePolicyForSpeechRecognitionPermissionRequestCallback     decidePolicyForSpeechRecognitionPermissionRequest;
@@ -1928,6 +1934,7 @@ typedef struct WKPageUIClientV19 {
 
     // Version 14.
     WKPageRunWebAuthenticationPanelCallback                             runWebAuthenticationPanel;
+    WKPageHandleJavaScriptDialogCallback                                handleJavaScriptDialog;
 
     // Version 15.
     WKPageDecidePolicyForSpeechRecognitionPermissionRequestCallback     decidePolicyForSpeechRecognitionPermissionRequest;
diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKUIDelegate.h b/Source/WebKit/UIProcess/API/Cocoa/WKUIDelegate.h
index acaeaef1be6d64f16d56d966db12cf9bb1f0507e..bb81783b20e33f69ceef2d00785a2e9c811dabe8 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/WKUIDelegate.h
+++ b/Source/WebKit/UIProcess/API/Cocoa/WKUIDelegate.h
@@ -153,6 +153,12 @@ WK_SWIFT_UI_ACTOR
  */
 - (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(WK_SWIFT_UI_ACTOR void (^)(NSString * _Nullable result))completionHandler;
 
+/*! @abstract Handle a JavaScript dialog.
+ @param webView The web view invoking the delegate method.
+ @param accept Whether to accept the dialog.
+ @param value Value to use for prompt dialog.
+ */
+- (void)webView:(WKWebView *)webView handleJavaScriptDialog:(BOOL)accept value:(nullable NSString *)value;
 
 /*! @abstract A delegate to request permission for microphone audio and camera video access.
  @param webView The web view invoking the delegate method.
diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.h b/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.h
index dcab0400bfdd58f9d16726aba6ce66492f7be34b..a1337cc7ab9f04fea3f51a3003fdb946ce3d34e5 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.h
+++ b/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.h
@@ -132,6 +132,8 @@ WK_CLASS_AVAILABLE(macos(10.11), ios(9.0))
 @property (nullable, nonatomic, copy) NSArray *proxyConfigurations NS_REFINED_FOR_SWIFT API_AVAILABLE(macos(14.0), ios(17.0));
 #endif
 
+- (uint64_t)sessionID;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.mm b/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.mm
index 632bf6f982628fe174eac150b36a10c1d7677b09..09f3075420aa9aa84a93c40533d3eea7acbdc587 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.mm
+++ b/Source/WebKit/UIProcess/API/Cocoa/WKWebsiteDataStore.mm
@@ -57,6 +57,7 @@
 #import "_WKWebPushActionInternal.h"
 #import "_WKWebsiteDataStoreConfigurationInternal.h"
 #import "_WKWebsiteDataStoreDelegate.h"
+#import <pal/SessionID.h>
 #import <WebCore/Credential.h>
 #import <WebCore/RegistrableDomain.h>
 #import <WebCore/ResourceResponse.h>
@@ -532,6 +533,11 @@ - (void)removeDataOfTypes:(NSSet *)dataTypes modifiedSince:(NSDate *)date comple
     });
 }
 
+- (uint64_t) sessionID
+{
+    return _websiteDataStore->sessionID().toUInt64();
+}
+
 static Vector<WebKit::WebsiteDataRecord> toWebsiteDataRecords(NSArray *dataRecords)
 {
     Vector<WebKit::WebsiteDataRecord> result;
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.h b/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.h
new file mode 100644
index 0000000000000000000000000000000000000000..8938effdcc896cb45f75e3445fbeac6054f69cc6
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <WebKit/WKFoundation.h>
+#import <WebKit/WKProcessPool.h>
+#import <WebKit/WKWebsiteDataStore.h>
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class WKWebView;
+
+WK_CLASS_AVAILABLE(macos(10.14.0))
+@interface _WKBrowserContext : NSObject
+@property (nonatomic, strong) WKWebsiteDataStore *dataStore;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+@property (nonatomic, strong) WKProcessPool *processPool;
+#pragma clang diagnostic pop
+@end
+
+@protocol _WKBrowserInspectorDelegate <NSObject>
+- (WKWebView *)createNewPage:(uint64_t)sessionID;
+- (_WKBrowserContext *)createBrowserContext:(NSString *)proxyServer WithBypassList:(NSString *)proxyBypassList;
+- (void)deleteBrowserContext:(uint64_t)sessionID;
+- (void)quit;
+@end
+
+WK_CLASS_AVAILABLE(macos(10.14.0))
+@interface _WKBrowserInspector : NSObject
++ (void)initializeRemoteInspectorPipe:(id<_WKBrowserInspectorDelegate>)delegate headless:(BOOL)headless;
+@end
+
+
+NS_ASSUME_NONNULL_END
+
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.mm b/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.mm
new file mode 100644
index 0000000000000000000000000000000000000000..69eb9c6aa30beb8ea21a0ef647e463043a868ab8
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKBrowserInspector.mm
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "_WKBrowserInspector.h"
+
+#include "BrowserInspectorPipe.h"
+#include "InspectorPlaywrightAgentClientMac.h"
+#include "PageClientImplMac.h"
+#include "WebKit2Initialize.h"
+
+#import "WKWebView.h"
+
+using namespace WebKit;
+
+@implementation _WKBrowserInspector
+
++ (void)initializeRemoteInspectorPipe:(id<_WKBrowserInspectorDelegate>)delegate headless:(BOOL)headless
+{
+#if ENABLE(REMOTE_INSPECTOR)
+    InitializeWebKit2();
+    PageClientImpl::setHeadless(headless);
+    initializeBrowserInspectorPipe(makeUnique<InspectorPlaywrightAgentClientMac>(delegate, headless));
+#endif
+}
+
+@end
+
+@implementation _WKBrowserContext
+- (void)dealloc
+{
+    [_dataStore release];
+    [_processPool release];
+    _dataStore = nil;
+    _processPool = nil;
+    [super dealloc];
+}
+@end
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.h b/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.h
index bcfc045d528aff77f639f53b9ebbbc4487050e39..08e1ec9a39e54fff521dbc65822f6c352087b0c0 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.h
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.h
@@ -67,6 +67,7 @@ WK_EXTERN WK_API_DEPRECATED("Creating and using multiple instances of WKProcessP
 @property (nonatomic) pid_t presentingApplicationPID WK_API_AVAILABLE(macos(10.13), ios(11.0));
 @property (nonatomic) audit_token_t presentingApplicationProcessToken WK_API_AVAILABLE(macos(10.13), ios(11.3));
 @property (nonatomic) BOOL processSwapsOnNavigation WK_API_AVAILABLE(macos(10.14), ios(12.0));
+@property (nonatomic) BOOL forceOverlayScrollbars WK_API_AVAILABLE(macos(10.14));
 @property (nonatomic) BOOL alwaysKeepAndReuseSwappedProcesses WK_API_AVAILABLE(macos(10.14), ios(12.0));
 @property (nonatomic) BOOL processSwapsOnNavigationWithinSameNonHTTPFamilyProtocol WK_API_AVAILABLE(macos(12.0), ios(15.0));
 @property (nonatomic) BOOL prewarmsProcessesAutomatically WK_API_AVAILABLE(macos(10.14.4), ios(12.2));
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.mm b/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.mm
index 63e3701355c7e47568b4506cdced95a46ff375af..014081a828011fa403676839c27f8514b3b73741 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.mm
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKProcessPoolConfiguration.mm
@@ -244,6 +244,16 @@ - (BOOL)processSwapsOnNavigation
     return _processPoolConfiguration->processSwapsOnNavigation();
 }
 
+- (void)setForceOverlayScrollbars:(BOOL)force
+{
+    _processPoolConfiguration->setForceOverlayScrollbars(force);
+}
+
+- (BOOL)forceOverlayScrollbars
+{
+    return _processPoolConfiguration->forceOverlayScrollbars();
+}
+
 - (void)setPrewarmsProcessesAutomatically:(BOOL)prewarms
 {
     _processPoolConfiguration->setIsAutomaticProcessWarmingEnabled(prewarms);
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKUserStyleSheet.h b/Source/WebKit/UIProcess/API/Cocoa/_WKUserStyleSheet.h
index 4974e14214e2bb3e982325b885bab33e54f83998..cacdf8c71fab248d38d2faf03f7affdcfed1ef62 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/_WKUserStyleSheet.h
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKUserStyleSheet.h
@@ -31,6 +31,7 @@ NS_ASSUME_NONNULL_BEGIN
 @class _WKUserContentWorld;
 @class WKContentWorld;
 @class WKWebView;
+@class WKContentWorld;
 
 typedef NS_ENUM(NSInteger, _WKUserStyleLevel) {
     _WKUserStyleUserLevel,
diff --git a/Source/WebKit/UIProcess/API/Cocoa/_WKWebPushSubscriptionData.mm b/Source/WebKit/UIProcess/API/Cocoa/_WKWebPushSubscriptionData.mm
index 4e688f53f9b1022b423e6ae171f042ddfcb858e0..611cd57e8ce91f64bc379b7be952f0e2ceb3e828 100644
--- a/Source/WebKit/UIProcess/API/Cocoa/_WKWebPushSubscriptionData.mm
+++ b/Source/WebKit/UIProcess/API/Cocoa/_WKWebPushSubscriptionData.mm
@@ -28,6 +28,9 @@
 #import <WebCore/WebCoreObjCExtras.h>
 #import <wtf/cocoa/SpanCocoa.h>
 
+#import <WebCore/WebCoreObjCExtras.h>
+#import <wtf/cocoa/SpanCocoa.h>
+
 @implementation _WKWebPushSubscriptionData
 
 - (void)dealloc
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspector.cpp b/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspector.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..77f295edf36e1f6ca156afbab06501ae6d0e8f11
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspector.cpp
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebKitBrowserInspector.h"
+
+#include "BrowserInspectorPipe.h"
+#include "BrowserInspectorWebSocketServer.h"
+#include "InspectorPlaywrightAgentClientGLib.h"
+#include "WebKitBrowserInspectorPrivate.h"
+#include "WebKitWebViewPrivate.h"
+#include <wtf/glib/GRefPtr.h>
+#include <wtf/glib/WTFGType.h>
+
+/**
+ * SECTION: WebKitBrowserInspector
+ * @Short_description: Access to the WebKit browser inspector
+ * @Title: WebKitBrowserInspector
+ *
+ * The WebKit Browser Inspector is an experimental API that provides
+ * access to the inspector via the remote debugging protocol. The protocol
+ * allows to create ephemeral contexts and create pages in them and then
+ * manipulate them using the inspector commands. This may be useful for
+ * the browser automation or remote debugging.
+ *
+ * Currently the protocol can be exposed to the parent process via a unix
+ * pipe.
+ */
+
+enum {
+    CREATE_NEW_PAGE,
+    QUIT_APPLICATION,
+
+    LAST_SIGNAL
+};
+
+struct _WebKitBrowserInspectorPrivate {
+    int unused { 0 };
+};
+
+WEBKIT_DEFINE_TYPE(WebKitBrowserInspector, webkit_browser_inspector, G_TYPE_OBJECT)
+
+static guint signals[LAST_SIGNAL] = { 0, };
+
+static void webkit_browser_inspector_class_init(WebKitBrowserInspectorClass* findClass)
+{
+    GObjectClass* gObjectClass = G_OBJECT_CLASS(findClass);
+
+    /**
+     * WebKitBrowserInspector::create-new-page:
+     * @inspector: the #WebKitBrowserInspector on which the signal is emitted
+     *
+     * Emitted when the inspector is requested to create a new page in the provided
+     * #WebKitWebContext.
+     *
+     * This signal is emitted when inspector receives 'Browser.createPage' command
+     * from its remote client. If the signal is not handled the command will fail.
+     *
+     * Returns: %WebKitWebView that contains created page.
+     */
+    signals[CREATE_NEW_PAGE] = g_signal_new(
+        "create-new-page",
+        G_TYPE_FROM_CLASS(gObjectClass),
+        G_SIGNAL_RUN_LAST,
+        G_STRUCT_OFFSET(WebKitBrowserInspectorClass, create_new_page),
+        nullptr, nullptr,
+        g_cclosure_marshal_generic,
+#if PLATFORM(GTK)
+        GTK_TYPE_WIDGET,
+#else
+        WEBKIT_TYPE_WEB_VIEW,
+#endif
+        1,
+        WEBKIT_TYPE_WEB_CONTEXT);
+
+    /**
+     * WebKitBrowserInspector::quit-application:
+     * @inspector: the #WebKitBrowserInspector on which the signal is emitted
+     *
+     * Emitted when the inspector is requested to close the browser application.
+     *
+     * This signal is emitted when inspector receives 'Browser.close' command
+     * from its remote client. If the signal is not handled the command will fail.
+     */
+    signals[QUIT_APPLICATION] = g_signal_new(
+        "quit-application",
+        G_TYPE_FROM_CLASS(gObjectClass),
+        G_SIGNAL_RUN_LAST,
+        G_STRUCT_OFFSET(WebKitBrowserInspectorClass, quit_application),
+        nullptr, nullptr,
+        g_cclosure_marshal_VOID__VOID,
+        G_TYPE_NONE, 0);
+}
+
+WebKit::WebPageProxy* webkitBrowserInspectorCreateNewPageInContext(WebKitWebContext* context)
+{
+    WebKitWebView* newWebView;
+    g_signal_emit(webkit_browser_inspector_get_default(), signals[CREATE_NEW_PAGE], 0, context, &newWebView);
+    if (!newWebView)
+        return nullptr;
+    return  &webkitWebViewGetPage(newWebView);
+}
+
+void webkitBrowserInspectorQuitApplication()
+{
+    g_signal_emit(webkit_browser_inspector_get_default(), signals[QUIT_APPLICATION], 0, NULL);
+}
+
+static gpointer createWebKitBrowserInspector(gpointer)
+{
+    static GRefPtr<WebKitBrowserInspector> browserInspector = adoptGRef(WEBKIT_BROWSER_INSPECTOR(g_object_new(WEBKIT_TYPE_BROWSER_INSPECTOR, nullptr)));
+    return browserInspector.get();
+}
+
+/**
+ * webkit_browser_inspector_get_default:
+ *
+ * Gets the default instance of the browser inspector.
+ *
+ * Returns: (transfer none): a #WebKitBrowserInspector
+ */
+WebKitBrowserInspector* webkit_browser_inspector_get_default(void)
+{
+    static GOnce onceInit = G_ONCE_INIT;
+    return WEBKIT_BROWSER_INSPECTOR(g_once(&onceInit, createWebKitBrowserInspector, 0));
+}
+
+/**
+ * webkit_browser_inspector_initialize_pipe:
+ *
+ * Creates browser inspector and configures pipe handler to communicate with
+ * the parent process.
+ */
+void webkit_browser_inspector_initialize_pipe(const char* defaultProxyURI, const char* const* ignoreHosts)
+{
+    WebKit::initializeBrowserInspectorPipe(makeUnique<WebKit::InspectorPlaywrightAgentClientGlib>(String::fromUTF8(defaultProxyURI), ignoreHosts));
+}
+
+/**
+ * webkit_browser_inspector_initialize_web_socket:
+ * @port: port number to start the remote debugging server on
+ * @defaultProxyURI: default proxy URI
+ * @ignoreHosts: list of hosts to ignore for proxy
+ *
+ * Creates browser inspector and configures HTTP server to communicate with
+ * remote debugging clients on the specified port.
+ */
+void webkit_browser_inspector_initialize_web_socket(unsigned port, const char* defaultProxyURI, const char* const* ignoreHosts)
+{
+    WebKit::initializeBrowserInspectorWebSocket(port, makeUnique<WebKit::InspectorPlaywrightAgentClientGlib>(String::fromUTF8(defaultProxyURI), ignoreHosts));
+}
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspectorPrivate.h b/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspectorPrivate.h
new file mode 100644
index 0000000000000000000000000000000000000000..e0b1da48465c850f541532ed961d1b778bea6028
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/glib/WebKitBrowserInspectorPrivate.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "WebKitBrowserInspector.h"
+#include "WebPageProxy.h"
+
+WebKit::WebPageProxy* webkitBrowserInspectorCreateNewPageInContext(WebKitWebContext*);
+void webkitBrowserInspectorQuitApplication();
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitProtocolHandler.cpp b/Source/WebKit/UIProcess/API/glib/WebKitProtocolHandler.cpp
index c816d0248895d9aa670e2226798237c696451b45..4d317eb4aaa630a97c03d70e7b15b05460354b01 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitProtocolHandler.cpp
+++ b/Source/WebKit/UIProcess/API/glib/WebKitProtocolHandler.cpp
@@ -160,51 +160,7 @@ static bool canvasAccelerationEnabled(WebKitURISchemeRequest* request)
     return webkit_settings_get_enable_2d_canvas_acceleration(webkit_web_view_get_settings(webView));
 }
 
-static bool uiProcessContextIsEGL()
-{
-#if PLATFORM(GTK)
-    return Display::singleton().glDisplayIsSharedWithGtk();
-#else
-    return true;
-#endif
-}
-
-static const char* openGLAPI()
-{
-    if (epoxy_is_desktop_gl())
-        return "OpenGL (libepoxy)";
-    return "OpenGL ES 2 (libepoxy)";
-}
-
-#if PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
-static String dmabufRendererWithSupportedBuffers()
-{
-    StringBuilder buffers;
-    buffers.append("DMABuf (Supported buffers: "_s);
-
-#if PLATFORM(GTK)
-    auto mode = AcceleratedBackingStore::rendererBufferTransportMode();
-#else
-    OptionSet<RendererBufferTransportMode> mode;
-    if (wpe_display_get_drm_device(wpe_display_get_primary()))
-        mode.add(RendererBufferTransportMode::Hardware);
-    mode.add(RendererBufferTransportMode::SharedMemory);
-#endif
-
-    if (mode.contains(RendererBufferTransportMode::Hardware))
-        buffers.append("Hardware"_s);
-    if (mode.contains(RendererBufferTransportMode::SharedMemory)) {
-        if (mode.contains(RendererBufferTransportMode::Hardware))
-            buffers.append(", "_s);
-        buffers.append("Shared Memory"_s);
-    }
-
-    buffers.append(')');
-    return buffers.toString();
-}
-
 #if USE(LIBDRM)
-
 // Base on function 'drmGetFormatName' from 'https://gitlab.freedesktop.org/mesa/drm/-/blob/main/xf86drm.c'.
 static String webkitDrmGetFormatName(uint32_t format)
 {
@@ -258,47 +214,6 @@ static String modifierListToString(const Vector<uint64_t, 1>& modifiers)
 #endif
 }
 
-static String renderBufferDescription(WebKitURISchemeRequest* request)
-{
-    StringBuilder bufferDescription;
-    auto description = webkitWebViewGetRendererBufferDescription(webkit_uri_scheme_request_get_web_view(request));
-    if (description.fourcc) {
-        auto formatName = webkitDrmGetFormatName(description.fourcc);
-        switch (description.type) {
-        case RendererBufferDescription::Type::DMABuf: {
-            auto modifierName = webkitDrmGetModifierName(description.modifier);
-            if (!modifierName.isNull())
-                bufferDescription.append("DMA-BUF: "_s, formatName, " ("_s, modifierName, ")"_s);
-            else
-                bufferDescription.append("Unknown"_s);
-            break;
-        }
-        case RendererBufferDescription::Type::SharedMemory:
-            bufferDescription.append("Shared Memory: "_s, formatName);
-            break;
-#if OS(ANDROID)
-        case RendererBufferDescription::Type::AHardwareBuffer:
-            bufferDescription.append("AHardwareBuffer: "_s, formatName);
-            break;
-#endif
-        }
-        switch (description.usage) {
-        case RendererBufferFormat::Usage::Rendering:
-            bufferDescription.append(" [Rendering]"_s);
-            break;
-        case RendererBufferFormat::Usage::Scanout:
-            bufferDescription.append(" [Scanout]"_s);
-            break;
-        case RendererBufferFormat::Usage::Mapping:
-            bufferDescription.append(" [Mapping]"_s);
-            break;
-        }
-    } else
-        bufferDescription.append("Unknown"_s);
-
-    return bufferDescription.toString();
-}
-
 #if USE(GBM)
 static String preferredBufferFormats(WebKitURISchemeRequest* request, JSON::Array& jsonArray)
 {
@@ -352,6 +267,87 @@ static String preferredBufferFormats(WebKitURISchemeRequest* request, JSON::Arra
 }
 #endif // USE(GBM)
 #endif // USE(LIBDRM)
+
+static bool uiProcessContextIsEGL()
+{
+#if PLATFORM(GTK)
+    return Display::singleton().glDisplayIsSharedWithGtk();
+#else
+    return true;
+#endif
+}
+
+static const char* openGLAPI()
+{
+    if (epoxy_is_desktop_gl())
+        return "OpenGL (libepoxy)";
+    return "OpenGL ES 2 (libepoxy)";
+}
+
+#if PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
+static String dmabufRendererWithSupportedBuffers()
+{
+    StringBuilder buffers;
+    buffers.append("DMABuf (Supported buffers: "_s);
+
+#if PLATFORM(GTK)
+    auto mode = AcceleratedBackingStore::rendererBufferTransportMode();
+#else
+    OptionSet<RendererBufferTransportMode> mode;
+    if (wpe_display_get_drm_device(wpe_display_get_primary()))
+        mode.add(RendererBufferTransportMode::Hardware);
+    mode.add(RendererBufferTransportMode::SharedMemory);
+#endif
+
+    if (mode.contains(RendererBufferTransportMode::Hardware))
+        buffers.append("Hardware"_s);
+    if (mode.contains(RendererBufferTransportMode::SharedMemory)) {
+        if (mode.contains(RendererBufferTransportMode::Hardware))
+            buffers.append(", "_s);
+        buffers.append("Shared Memory"_s);
+    }
+
+    buffers.append(')');
+    return buffers.toString();
+}
+
+#if USE(LIBDRM)
+static String renderBufferDescription(WebKitURISchemeRequest* request)
+{
+    StringBuilder bufferDescription;
+    auto description = webkitWebViewGetRendererBufferDescription(webkit_uri_scheme_request_get_web_view(request));
+    if (description.fourcc) {
+        auto formatName = webkitDrmGetFormatName(description.fourcc);
+        switch (description.type) {
+        case RendererBufferDescription::Type::DMABuf: {
+            auto modifierName = webkitDrmGetModifierName(description.modifier);
+            if (!modifierName.isNull())
+                bufferDescription.append("DMA-BUF: "_s, formatName, " ("_s, modifierName, ")"_s);
+            else
+                bufferDescription.append("Unknown"_s);
+            break;
+        }
+        case RendererBufferDescription::Type::SharedMemory:
+            bufferDescription.append("Shared Memory: "_s, formatName);
+            break;
+        }
+        switch (description.usage) {
+        case RendererBufferFormat::Usage::Rendering:
+            bufferDescription.append(" [Rendering]"_s);
+            break;
+        case RendererBufferFormat::Usage::Scanout:
+            bufferDescription.append(" [Scanout]"_s);
+            break;
+        case RendererBufferFormat::Usage::Mapping:
+            bufferDescription.append(" [Mapping]"_s);
+            break;
+        }
+    } else
+        bufferDescription.append("Unknown"_s);
+
+    return bufferDescription.toString();
+}
+#endif // USE(LIBDRM)
 #endif // PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
 
 static String vblankMonitorType(const DisplayVBlankMonitor& monitor)
@@ -382,7 +378,6 @@ static String threadedRenderingInfo(const RenderProcessInfo& info)
 static String supportedBufferFormats(const RenderProcessInfo& info, JSON::Array& jsonArray)
 {
     StringBuilder builder;
-#if PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
     for (const auto& format : info.supportedBufferFormats) {
         StringBuilder jsonStringBuilder;
         auto formatName = webkitDrmGetFormatName(format.fourcc);
@@ -397,7 +392,6 @@ static String supportedBufferFormats(const RenderProcessInfo& info, JSON::Array&
         }
         jsonArray.pushString(jsonStringBuilder.toString());
     }
-#endif
     return builder.toString();
 }
 #endif
@@ -732,14 +726,18 @@ void WebKitProtocolHandler::handleGPU(WebKitURISchemeRequest* request, RenderPro
         if (showBuffersInfo) {
 #if PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
             addTableRow(hardwareAccelerationObject, "Renderer"_s, dmabufRendererWithSupportedBuffers());
+#endif
+
 #if USE(LIBDRM)
 #if USE(GBM)
             auto jsonFormats = JSON::Array::create();
             auto formatsString = preferredBufferFormats(request, jsonFormats.get());
             addTableRow(hardwareAccelerationObject, "Preferred buffer formats"_s, formatsString, WTF::move(jsonFormats));
 #endif
-            addTableRow(hardwareAccelerationObject, "Buffer format"_s, renderBufferDescription(request));
 #endif // USE(LIBDRM)
+
+#if PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
+            addTableRow(hardwareAccelerationObject, "Buffer format"_s, renderBufferDescription(request));
 #endif // PLATFORM(GTK) || (PLATFORM(WPE) && ENABLE(WPE_PLATFORM))
         }
 
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitUIClient.cpp b/Source/WebKit/UIProcess/API/glib/WebKitUIClient.cpp
index e94ec4aae750773fdb635e2b302735f6821ae3ef..eb8547be6916f5f95dc3be86c35292b4f7d7b0c5 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitUIClient.cpp
+++ b/Source/WebKit/UIProcess/API/glib/WebKitUIClient.cpp
@@ -102,6 +102,10 @@ private:
         page.makeViewBlankIfUnpaintedSinceLastLoadCommit();
         webkitWebViewRunJavaScriptPrompt(m_webView, message.utf8(), defaultValue.utf8(), WTF::move(completionHandler));
     }
+    void handleJavaScriptDialog(WebPageProxy&, bool accept, const String& value) final
+    {
+        webkitWebViewHandleJavaScriptDialog(m_webView, accept, value);
+    }
 
     bool canRunBeforeUnloadConfirmPanel() const final { return true; }
 
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebContext.cpp b/Source/WebKit/UIProcess/API/glib/WebKitWebContext.cpp
index e1e5687811e65ce1f4cbeb082febffef479a279e..352135e3c98948921b5b135805ecc86043bb336a 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebContext.cpp
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebContext.cpp
@@ -426,10 +426,19 @@ static void webkitWebContextSetProperty(GObject* object, guint propID, const GVa
     }
 }
 
+static int webkitWebContext = 0;
+
+int webkitWebContextExistingCount()
+{
+    return webkitWebContext;
+}
+
 static void webkitWebContextConstructed(GObject* object)
 {
     G_OBJECT_CLASS(webkit_web_context_parent_class)->constructed(object);
 
+    ++webkitWebContext;
+
     GUniquePtr<char> bundleFilename(g_build_filename(injectedBundleDirectory(), INJECTED_BUNDLE_FILENAME, nullptr));
 
     WebKitWebContext* webContext = WEBKIT_WEB_CONTEXT(object);
@@ -485,6 +494,8 @@ static void webkitWebContextConstructed(GObject* object)
 
 static void webkitWebContextDispose(GObject* object)
 {
+    --webkitWebContext;
+
     WebKitWebContextPrivate* priv = WEBKIT_WEB_CONTEXT(object)->priv;
     if (!priv->clientsDetached) {
         priv->clientsDetached = true;
@@ -946,6 +957,11 @@ WebKitNetworkSession* webkit_web_context_get_network_session_for_automation(WebK
     return nullptr;
 #endif
 }
+
+void webkit_web_context_set_network_session_for_automation(WebKitWebContext* context, WebKitNetworkSession* session)
+{
+    context->priv->automationNetworkSession = session;
+}
 #endif
 /**
  * webkit_web_context_set_cache_model:
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebContext.h.in b/Source/WebKit/UIProcess/API/glib/WebKitWebContext.h.in
index 15fe3e8e5652147ba54af266eda66b3962c074b9..d463fa78af375badb239c890da50ba1125e19de8 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebContext.h.in
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebContext.h.in
@@ -161,6 +161,10 @@ webkit_web_context_set_automation_allowed           (WebKitWebContext
 #if ENABLE(2022_GLIB_API)
 WEBKIT_API WebKitNetworkSession *
 webkit_web_context_get_network_session_for_automation(WebKitWebContext             *context);
+
+WEBKIT_API void
+webkit_web_context_set_network_session_for_automation(WebKitWebContext             *context,
+                                                      WebKitNetworkSession          *session);
 #endif
 
 WEBKIT_API void
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebContextPrivate.h b/Source/WebKit/UIProcess/API/glib/WebKitWebContextPrivate.h
index c1945fbe717a42afc1f51d64a80c7de3fa9009ba..ab63fe19b00ecbd64c9421e6eecad3e25cbb2361 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebContextPrivate.h
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebContextPrivate.h
@@ -43,3 +43,4 @@ void webkitWebContextInitializeNotificationPermissions(WebKitWebContext*);
 #if ENABLE(REMOTE_INSPECTOR)
 void webkitWebContextWillCloseAutomationSession(WebKitWebContext*);
 #endif
+int webkitWebContextExistingCount();
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp b/Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp
index 3ed130d4fb0345c7309a240d3a412991e15f9904..10c9c0c89e4a9caf68d8075cde195bbf805e6887 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp
@@ -40,6 +40,7 @@
 #include "WebContextMenuItem.h"
 #include "WebContextMenuItemData.h"
 #include "WebFrameProxy.h"
+#include "WebPageInspectorController.h"
 #include "WebKitAuthenticationRequestPrivate.h"
 #include "WebKitBackForwardListPrivate.h"
 #include "WebKitContextMenuClient.h"
@@ -160,6 +161,7 @@ enum {
     CLOSE,
 
     SCRIPT_DIALOG,
+    SCRIPT_DIALOG_HANDLED,
 
     DECIDE_POLICY,
     PERMISSION_REQUEST,
@@ -546,6 +548,13 @@ GRefPtr<WebKitOptionMenu> WebKitWebViewClient::showOptionMenu(WebKitPopupMenu& p
 
 void WebKitWebViewClient::frameDisplayed(WKWPE::View&)
 {
+
+#if USE(SKIA)
+    sk_sp<SkImage> surface(webkitWebViewBackendTakeScreenshot(m_webView->priv->backend.get()));
+    if (surface)
+        getPage(m_webView).inspectorController().didPaint(WTF::move(surface));
+#endif
+
     {
         SetForScope inFrameDisplayedGuard(m_webView->priv->inFrameDisplayed, true);
         for (const auto& callback : m_webView->priv->frameDisplayedCallbacks) {
@@ -653,7 +662,7 @@ static gboolean webkitWebViewDecidePolicy(WebKitWebView*, WebKitPolicyDecision*
 
 static gboolean webkitWebViewPermissionRequest(WebKitWebView*, WebKitPermissionRequest* request)
 {
-#if ENABLE(POINTER_LOCK)
+#if ENABLE(POINTER_LOCK) && PLATFORM(GTK)
     if (WEBKIT_IS_POINTER_LOCK_PERMISSION_REQUEST(request)) {
         webkit_permission_request_allow(request);
         return TRUE;
@@ -1001,6 +1010,10 @@ static void webkitWebViewConstructed(GObject* object)
         priv->websitePolicies = adoptGRef(webkit_website_policies_new());
 
     Ref configuration = priv->relatedView && priv->relatedView->priv->configurationForNextRelatedView ? priv->relatedView->priv->configurationForNextRelatedView.releaseNonNull() : webkitWebViewCreatePageConfiguration(webView);
+
+    // Playwright: REGRESSION(278896@main): Need to preserve configuration's preferences.
+    configuration->setPreferences(webkitSettingsGetPreferences(priv->settings.get()));
+
     webkitWebViewCreatePage(webView, WTF::move(configuration));
     webkitWebContextWebViewCreated(priv->context.get(), webView);
 
@@ -2114,6 +2127,15 @@ static void webkit_web_view_class_init(WebKitWebViewClass* webViewClass)
         G_TYPE_BOOLEAN, 1,
         WEBKIT_TYPE_SCRIPT_DIALOG);
 
+    signals[SCRIPT_DIALOG_HANDLED] = g_signal_new(
+        "script-dialog-handled",
+        G_TYPE_FROM_CLASS(webViewClass),
+        G_SIGNAL_RUN_LAST,
+        G_STRUCT_OFFSET(WebKitWebViewClass, script_dialog),
+        g_signal_accumulator_true_handled, nullptr,
+        g_cclosure_marshal_generic,
+        G_TYPE_BOOLEAN, 1);
+
     /**
      * WebKitWebView::decide-policy:
      * @web_view: the #WebKitWebView on which the signal is emitted
@@ -2948,6 +2970,23 @@ void webkitWebViewRunJavaScriptBeforeUnloadConfirm(WebKitWebView* webView, const
     webkit_script_dialog_unref(webView->priv->currentScriptDialog);
 }
 
+void webkitWebViewHandleJavaScriptDialog(WebKitWebView* webView, bool accept, const String& value) {
+    auto* dialog = webView->priv->currentScriptDialog;
+#if PLATFORM(WPE)
+    dialog->isUserHandled = false;
+#endif
+    webkit_script_dialog_ref(dialog);
+    if (!value.isNull())
+        webkitWebViewSetCurrentScriptDialogUserInput(webView, value);
+    if (accept)
+        webkitWebViewAcceptCurrentScriptDialog(webView);
+    else
+        webkitWebViewDismissCurrentScriptDialog(webView);
+    gboolean returnValue;
+    g_signal_emit(webView, signals[SCRIPT_DIALOG_HANDLED], 0, dialog, &returnValue);
+    webkit_script_dialog_unref(dialog);
+}
+
 bool webkitWebViewIsShowingScriptDialog(WebKitWebView* webView)
 {
     if (!webView->priv->currentScriptDialog)
diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebViewPrivate.h b/Source/WebKit/UIProcess/API/glib/WebKitWebViewPrivate.h
index 8bff6235bb227ed9e53017f45ce6469dede379fb..34a4c07514c1661ea7e333de5ea674123b809b2f 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebViewPrivate.h
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebViewPrivate.h
@@ -67,6 +67,7 @@ void webkitWebViewRunJavaScriptAlert(WebKitWebView*, const CString& message, Fun
 void webkitWebViewRunJavaScriptConfirm(WebKitWebView*, const CString& message, Function<void(bool)>&& completionHandler);
 void webkitWebViewRunJavaScriptPrompt(WebKitWebView*, const CString& message, const CString& defaultText, Function<void(const String&)>&& completionHandler);
 void webkitWebViewRunJavaScriptBeforeUnloadConfirm(WebKitWebView*, const CString& message, Function<void(bool)>&& completionHandler);
+void webkitWebViewHandleJavaScriptDialog(WebKitWebView*, bool accept, const String& value);
 bool webkitWebViewIsShowingScriptDialog(WebKitWebView*);
 bool webkitWebViewIsScriptDialogRunning(WebKitWebView*, WebKitScriptDialog*);
 String webkitWebViewGetCurrentScriptDialogMessage(WebKitWebView*);
diff --git a/Source/WebKit/UIProcess/API/glib/webkit.h.in b/Source/WebKit/UIProcess/API/glib/webkit.h.in
index d48845217e514f1fb9dc84917cd8ba7b26046dee..0402761230371a6f9e9e78caaaf2f207fa3c760c 100644
--- a/Source/WebKit/UIProcess/API/glib/webkit.h.in
+++ b/Source/WebKit/UIProcess/API/glib/webkit.h.in
@@ -45,6 +45,7 @@
 #include <@API_INCLUDE_PREFIX@/WebKitAutomationSession.h>
 #include <@API_INCLUDE_PREFIX@/WebKitBackForwardList.h>
 #include <@API_INCLUDE_PREFIX@/WebKitBackForwardListItem.h>
+#include <@API_INCLUDE_PREFIX@/WebKitBrowserInspector.h>
 #if PLATFORM(GTK)
 #include <@API_INCLUDE_PREFIX@/WebKitClipboardPermissionRequest.h>
 #include <@API_INCLUDE_PREFIX@/WebKitColorChooserRequest.h>
diff --git a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
index a33310d9ef8795338756c5d38da9fdc18fd65d6d..363988712345502a202f9feea21f2ca365ed41c0 100644
--- a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
+++ b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
@@ -246,7 +246,7 @@ WebCore::IntPoint PageClientImpl::accessibilityScreenToRootView(const WebCore::I
     return screenToRootView(point);
 }
 
-WebCore::IntRect PageClientImpl::rootViewToAccessibilityScreen(const WebCore::IntRect& rect)    
+WebCore::IntRect PageClientImpl::rootViewToAccessibilityScreen(const WebCore::IntRect& rect)
 {
     return rootViewToScreen(rect);
 }
@@ -255,6 +255,8 @@ void PageClientImpl::doneWithKeyEvent(const NativeWebKeyboardEvent& event, bool
 {
     if (wasEventHandled || event.type() != WebEventType::KeyDown || !event.nativeEvent())
         return;
+    if (!event.nativeEvent())
+        return;
 
     // Always consider arrow keys as handled, otherwise the GtkWindow key bindings will move the focus.
     guint keyval;
@@ -345,9 +347,9 @@ void PageClientImpl::selectionDidChange()
         webkitWebViewSelectionDidChange(WEBKIT_WEB_VIEW(m_viewWidget));
 }
 
-RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect)
+RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect, bool nominalResolution)
 {
-    return webkitWebViewBaseTakeViewSnapshot(WEBKIT_WEB_VIEW_BASE(m_viewWidget), WTF::move(clipRect));
+    return webkitWebViewBaseTakeViewSnapshot(WEBKIT_WEB_VIEW_BASE(m_viewWidget), WTF::move(clipRect), nominalResolution);
 }
 
 void PageClientImpl::didChangeContentSize(const IntSize& size)
diff --git a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
index 0dae577227eaac423bdc97d9c859fe5afc2d06c1..8edbe1cb3e7d0f818290122861635c063595c632 100644
--- a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
+++ b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
@@ -104,7 +104,7 @@ private:
     RefPtr<WebDataListSuggestionsDropdown> createDataListSuggestionsDropdown(WebPageProxy&) override;
     Ref<WebCore::ValidationBubble> createValidationBubble(String&& message, const WebCore::ValidationBubble::Settings&) final;
     void selectionDidChange() override;
-    RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&) override;
+    RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&, bool nominalResolution = false) override;
 #if ENABLE(DRAG_SUPPORT)
     void startDrag(WebCore::SelectionData&&, OptionSet<WebCore::DragOperation>, RefPtr<WebCore::ShareableBitmap>&& dragImage, WebCore::IntPoint&& dragImageHotspot) override;
     void didPerformDragControllerAction() override;
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitBrowserInspector.h b/Source/WebKit/UIProcess/API/gtk/WebKitBrowserInspector.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d6c987019e69d2e1ab97266d01180542534f4b0
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitBrowserInspector.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if !defined(__WEBKIT2_H_INSIDE__) && !defined(BUILDING_WEBKIT)
+#error "Only <webkit2/webkit2.h> can be included directly."
+#endif
+
+#ifndef WebKitBrowserInspector_h
+#define WebKitBrowserInspector_h
+
+#include <glib-object.h>
+#include <webkit/WebKitDefines.h>
+#include <webkit/WebKitWebView.h>
+
+G_BEGIN_DECLS
+
+#define WEBKIT_TYPE_BROWSER_INSPECTOR            (webkit_browser_inspector_get_type())
+#define WEBKIT_BROWSER_INSPECTOR(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj), WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspector))
+#define WEBKIT_IS_BROWSER_INSPECTOR(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), WEBKIT_TYPE_BROWSER_INSPECTOR))
+#define WEBKIT_BROWSER_INSPECTOR_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),  WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspectorClass))
+#define WEBKIT_IS_BROWSER_INSPECTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),  WEBKIT_TYPE_BROWSER_INSPECTOR))
+#define WEBKIT_BROWSER_INSPECTOR_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj),  WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspectorClass))
+
+typedef struct _WebKitBrowserInspector        WebKitBrowserInspector;
+typedef struct _WebKitBrowserInspectorClass   WebKitBrowserInspectorClass;
+typedef struct _WebKitBrowserInspectorPrivate WebKitBrowserInspectorPrivate;
+
+struct _WebKitBrowserInspector {
+    GObject parent;
+
+    WebKitBrowserInspectorPrivate *priv;
+};
+
+struct _WebKitBrowserInspectorClass {
+    GObjectClass parent_class;
+
+    WebKitWebView *(* create_new_page)           (WebKitBrowserInspector    *browser_inspector,
+                                                  WebKitWebContext          *context);
+    WebKitWebView *(* quit_application)          (WebKitBrowserInspector    *browser_inspector);
+
+    void (*_webkit_reserved0) (void);
+    void (*_webkit_reserved1) (void);
+    void (*_webkit_reserved2) (void);
+    void (*_webkit_reserved3) (void);
+};
+
+WEBKIT_API GType
+webkit_browser_inspector_get_type                     (void);
+
+WEBKIT_API WebKitBrowserInspector *
+webkit_browser_inspector_get_default                  (void);
+
+WEBKIT_API void
+webkit_browser_inspector_initialize_pipe              (const char* defaultProxyURI,
+                                                       const char* const* ignoreHosts);
+
+WEBKIT_API void
+webkit_browser_inspector_initialize_web_socket        (unsigned port,
+                                                       const char* defaultProxyURI,
+                                                       const char* const* ignoreHosts);
+
+G_END_DECLS
+
+#endif
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitPointerLockPermissionRequest.h.in b/Source/WebKit/UIProcess/API/gtk/WebKitPointerLockPermissionRequest.h.in
index 496079da90993ac37689b060b69ecd4a67c2b6a8..af30181ca922f16c0f6e245c70e5ce7d8999341f 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitPointerLockPermissionRequest.h.in
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitPointerLockPermissionRequest.h.in
@@ -23,7 +23,7 @@
 #define WebKitPointerLockPermissionRequest_h
 
 #include <glib-object.h>
-#include <webkit/WebKitDefines.h>
+#include <@API_INCLUDE_PREFIX@/WebKitDefines.h>
 
 G_BEGIN_DECLS
 
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
index d5bb72f0ffbf99eddebc9819cb3f24fdaffdf468..d248c201e0ee9db63a117b8cde34661595a594fa 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp
@@ -2879,6 +2879,11 @@ void webkitWebViewBaseResetClickCounter(WebKitWebViewBase* webkitWebViewBase)
 #endif
 }
 
+WebKit::AcceleratedBackingStore* webkitWebViewBaseGetAcceleratedBackingStore(WebKitWebViewBase* webkitWebViewBase)
+{
+    return webkitWebViewBase->priv->acceleratedBackingStore.get();
+}
+
 void webkitWebViewBaseEnterAcceleratedCompositingMode(WebKitWebViewBase* webkitWebViewBase, const LayerTreeContext& layerTreeContext)
 {
     ASSERT(webkitWebViewBase->priv->acceleratedBackingStore);
@@ -2935,12 +2940,12 @@ void webkitWebViewBasePageClosed(WebKitWebViewBase* webkitWebViewBase)
         webkitWebViewBase->priv->acceleratedBackingStore->update({ });
 }
 
-RefPtr<WebKit::ViewSnapshot> webkitWebViewBaseTakeViewSnapshot(WebKitWebViewBase* webkitWebViewBase, std::optional<IntRect>&& clipRect)
+RefPtr<WebKit::ViewSnapshot> webkitWebViewBaseTakeViewSnapshot(WebKitWebViewBase* webkitWebViewBase, std::optional<IntRect>&& clipRect, bool nominalResolution)
 {
     WebPageProxy* page = webkitWebViewBase->priv->pageProxy.get();
 
     IntSize size = clipRect ? clipRect->size() : page->viewSize();
-    float deviceScale = page->deviceScaleFactor();
+    float deviceScale = nominalResolution ? 1 : page->deviceScaleFactor();
     size.scale(deviceScale);
 
 #if !USE(GTK4)
diff --git a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
index d84099f5109a4a0a8a0b51d4f46ce059460b8280..48d56239c4595053696a63fa48c69db0706ca19a 100644
--- a/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
+++ b/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBasePrivate.h
@@ -27,6 +27,7 @@
 
 #pragma once
 
+#include "AcceleratedBackingStore.h"
 #include "APIPageConfiguration.h"
 #include "GRefPtrGtk.h"
 #include "GUniquePtrGtk.h"
@@ -105,7 +106,7 @@ void webkitWebViewBaseStartDrag(WebKitWebViewBase*, WebCore::SelectionData&&, Op
 void webkitWebViewBaseDidPerformDragControllerAction(WebKitWebViewBase*);
 #endif
 
-RefPtr<WebKit::ViewSnapshot> webkitWebViewBaseTakeViewSnapshot(WebKitWebViewBase*, std::optional<WebCore::IntRect>&&);
+RefPtr<WebKit::ViewSnapshot> webkitWebViewBaseTakeViewSnapshot(WebKitWebViewBase*, std::optional<WebCore::IntRect>&&, bool nominalResolution);
 void webkitWebViewBaseSetEnableBackForwardNavigationGesture(WebKitWebViewBase*, bool enabled);
 WebKit::ViewGestureController* webkitWebViewBaseViewGestureController(WebKitWebViewBase*);
 
@@ -147,3 +148,5 @@ void webkitWebViewBaseSetPlugID(WebKitWebViewBase*, const String&);
 
 WebKit::RendererBufferDescription webkitWebViewBaseGetRendererBufferDescription(WebKitWebViewBase*);
 void webkitWebViewBaseSetCursor(WebKitWebViewBase*, const WebCore::Cursor&);
+
+WebKit::AcceleratedBackingStore* webkitWebViewBaseGetAcceleratedBackingStore(WebKitWebViewBase*);
diff --git a/Source/WebKit/UIProcess/API/wpe/APIViewClient.h b/Source/WebKit/UIProcess/API/wpe/APIViewClient.h
index 9091ae5198e765c2cfe0584d121afe4f88df3c0e..b0efedec419673ef2bfd0fd79406774e24aa98e9 100644
--- a/Source/WebKit/UIProcess/API/wpe/APIViewClient.h
+++ b/Source/WebKit/UIProcess/API/wpe/APIViewClient.h
@@ -26,6 +26,9 @@
 #pragma once
 
 #include "UserMessage.h"
+#if USE(SKIA)
+#include <skia/core/SkImage.h>
+#endif
 #include <wtf/CompletionHandler.h>
 #include <wtf/TZoneMallocInlines.h>
 
@@ -50,6 +53,11 @@ public:
     virtual bool isGLibBasedAPI() { return false; }
 
     virtual void frameDisplayed(WKWPE::View&) { }
+// Playwright begin
+#if USE(SKIA)
+    virtual sk_sp<SkImage> takeViewScreenshot() { return nullptr; }
+#endif
+// Playwright end
     virtual void willStartLoad(WKWPE::View&) { }
     virtual void didChangePageID(WKWPE::View&) { }
     virtual void didReceiveUserMessage(WKWPE::View&, WebKit::UserMessage&&, CompletionHandler<void(WebKit::UserMessage&&)>&& completionHandler) { completionHandler(WebKit::UserMessage()); }
diff --git a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
index 44bec4dfe534281e791339bc6eebc3795d65b2c9..4d7cd002b8420382e3628886a7fc4c6229db2702 100644
--- a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
+++ b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
@@ -36,9 +36,12 @@
 #include "WPEWebViewLegacy.h"
 #include "WPEWebViewPlatform.h"
 #include "WebColorPicker.h"
+#include "WebColorPickerWPE.h"
+#include "WebDateTimePickerWPE.h"
 #include "WebContextMenuProxy.h"
 #include "WebContextMenuProxyWPE.h"
 #include "WebDataListSuggestionsDropdown.h"
+#include "WebDataListSuggestionsDropdownWPE.h"
 #include "WebDateTimePicker.h"
 #include "WebKitPopupMenu.h"
 #include <WebCore/ActivityState.h>
@@ -62,6 +65,12 @@
 #include <wpe/wpe.h>
 #endif
 
+#if USE(SKIA)
+#include <skia/core/SkBitmap.h>
+#include <skia/core/SkCanvas.h>
+#include <skia/core/SkImage.h>
+#endif
+
 namespace WebKit {
 
 WTF_MAKE_TZONE_ALLOCATED_IMPL(PageClientImpl);
@@ -230,7 +239,7 @@ WebCore::IntPoint PageClientImpl::accessibilityScreenToRootView(const WebCore::I
 
 WebCore::IntRect PageClientImpl::rootViewToAccessibilityScreen(const WebCore::IntRect& rect)
 {
-    return rootViewToScreen(rect);    
+    return rootViewToScreen(rect);
 }
 
 void PageClientImpl::doneWithKeyEvent(const NativeWebKeyboardEvent&, bool)
@@ -318,14 +327,14 @@ Ref<WebContextMenuProxy> PageClientImpl::createContextMenuProxy(WebPageProxy& pa
 }
 #endif
 
-RefPtr<WebColorPicker> PageClientImpl::createColorPicker(WebPageProxy&, const WebCore::Color& intialColor, const WebCore::IntRect&, ColorControlSupportsAlpha supportsAlpha, Vector<WebCore::Color>&&, std::optional<WebCore::FrameIdentifier>)
+RefPtr<WebColorPicker> PageClientImpl::createColorPicker(WebPageProxy& page, const WebCore::Color& intialColor, const WebCore::IntRect& rect, ColorControlSupportsAlpha supportsAlpha, Vector<WebCore::Color>&&, std::optional<WebCore::FrameIdentifier> frameID)
 {
-    return nullptr;
+    return WebColorPickerWPE::create(page, intialColor, rect, frameID);
 }
 
-RefPtr<WebDataListSuggestionsDropdown> PageClientImpl::createDataListSuggestionsDropdown(WebPageProxy&)
+RefPtr<WebKit::WebDataListSuggestionsDropdown> PageClientImpl::createDataListSuggestionsDropdown(WebKit::WebPageProxy& page)
 {
-    return nullptr;
+    return WebDataListSuggestionsDropdownWPE::create(page);
 }
 
 RefPtr<WebDateTimePicker> PageClientImpl::createDateTimePicker(WebPageProxy& page)
@@ -585,11 +594,11 @@ void PageClientImpl::callAfterNextPresentationUpdate(CompletionHandler<void()>&&
     m_view.callAfterNextPresentationUpdate(WTF::move(callback));
 }
 
-RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect)
+RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect, bool nominalResolution)
 {
 #if ENABLE(WPE_PLATFORM)
     if (m_view.wpeView()) {
-        auto snapshot = static_cast<WKWPE::ViewPlatform&>(m_view).takeViewSnapshot(WTF::move(clipRect));
+        auto snapshot = static_cast<WKWPE::ViewPlatform&>(m_view).takeViewSnapshot(WTF::move(clipRect), nominalResolution);
         // FIXME Forward the Expected in https://webkit.org/b/300271
         if (snapshot)
             return WTF::move(snapshot.value());
@@ -600,4 +609,11 @@ RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::Int
     return nullptr;
 }
 
+#if ENABLE(DATE_AND_TIME_INPUT_TYPES)
+RefPtr<WebDateTimePicker> PageClientImpl::createDateTimePicker(WebPageProxy& page)
+{
+    return WebDateTimePickerWPE::create(page);
+}
+#endif
+
 } // namespace WebKit
diff --git a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
index a1f18769eb2398cb467067f7f2d6ad864d1ed0ee..842bc438edd93ad09ddc1012898856e4ac686f00 100644
--- a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
+++ b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
@@ -193,7 +193,11 @@ private:
 
     WebKitWebResourceLoadManager* webResourceLoadManager() override;
 
-    RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&) override;
+    RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&, bool nominalResolution) override;
+
+#if ENABLE(DATE_AND_TIME_INPUT_TYPES)
+    RefPtr<WebDateTimePicker> createDateTimePicker(WebPageProxy&) override;
+#endif
 
     WKWPE::View& m_view;
     DefaultUndoController m_undoController;
diff --git a/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.cpp b/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.cpp
index 32b91bcbf205dfbd36c9275a6167877cf561a172..ce45bcc6e7fdd92efa31d974a8230253fbf3294e 100644
--- a/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.cpp
+++ b/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.cpp
@@ -645,9 +645,9 @@ void ViewPlatform::callAfterNextPresentationUpdate(CompletionHandler<void()>&& c
     }
 }
 
-Expected<Ref<ViewSnapshot>, String> ViewPlatform::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect)
+Expected<Ref<ViewSnapshot>, String> ViewPlatform::takeViewSnapshot(std::optional<WebCore::IntRect>&& clipRect, bool nominalResolution)
 {
-    return m_backingStore->takeSnapshot(WTF::move(clipRect));
+    return m_backingStore->takeSnapshot(WTF::move(clipRect), nominalResolution);
 }
 
 } // namespace WKWPE
diff --git a/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.h b/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.h
index c3ca21d8e499d08a4e5ebf4a32290114abfae4ee..1de5446d0763256ac826a5e71e51e6d2838172f8 100644
--- a/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.h
+++ b/Source/WebKit/UIProcess/API/wpe/WPEWebViewPlatform.h
@@ -63,7 +63,7 @@ public:
     static WebKit::WebPageProxy* platformWebPageProxyForGamepadInput();
 #endif
 
-    Expected<Ref<WebKit::ViewSnapshot>, String> takeViewSnapshot(std::optional<WebCore::IntRect>&&);
+    Expected<Ref<WebKit::ViewSnapshot>, String> takeViewSnapshot(std::optional<WebCore::IntRect>&&, bool nominalResolution);
 
     void updateAcceleratedSurface(uint64_t);
     WebKit::RendererBufferDescription renderBufferDescription() const;
diff --git a/Source/WebKit/UIProcess/API/wpe/WebKitBrowserInspector.h b/Source/WebKit/UIProcess/API/wpe/WebKitBrowserInspector.h
new file mode 100644
index 0000000000000000000000000000000000000000..22baa003f1220a87d5c1012cd485a6fee1570b22
--- /dev/null
+++ b/Source/WebKit/UIProcess/API/wpe/WebKitBrowserInspector.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if !defined(__WEBKIT_H_INSIDE__) && !defined(BUILDING_WEBKIT)
+#error "Only <wpe/webkit.h> can be included directly."
+#endif
+
+#ifndef WebKitBrowserInspector_h
+#define WebKitBrowserInspector_h
+
+#include <glib-object.h>
+#include <wpe/WebKitDefines.h>
+#include <wpe/WebKitWebView.h>
+
+G_BEGIN_DECLS
+
+#define WEBKIT_TYPE_BROWSER_INSPECTOR            (webkit_browser_inspector_get_type())
+#define WEBKIT_BROWSER_INSPECTOR(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj), WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspector))
+#define WEBKIT_IS_BROWSER_INSPECTOR(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), WEBKIT_TYPE_BROWSER_INSPECTOR))
+#define WEBKIT_BROWSER_INSPECTOR_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),  WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspectorClass))
+#define WEBKIT_IS_BROWSER_INSPECTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),  WEBKIT_TYPE_BROWSER_INSPECTOR))
+#define WEBKIT_BROWSER_INSPECTOR_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj),  WEBKIT_TYPE_BROWSER_INSPECTOR, WebKitBrowserInspectorClass))
+
+typedef struct _WebKitBrowserInspector        WebKitBrowserInspector;
+typedef struct _WebKitBrowserInspectorClass   WebKitBrowserInspectorClass;
+typedef struct _WebKitBrowserInspectorPrivate WebKitBrowserInspectorPrivate;
+
+struct _WebKitBrowserInspector {
+    GObject parent;
+
+    WebKitBrowserInspectorPrivate *priv;
+};
+
+struct _WebKitBrowserInspectorClass {
+    GObjectClass parent_class;
+
+    WebKitWebView *(* create_new_page)           (WebKitBrowserInspector    *browser_inspector,
+                                                  WebKitWebContext          *context);
+    WebKitWebView *(* quit_application)          (WebKitBrowserInspector    *browser_inspector);
+
+    void (*_webkit_reserved0) (void);
+    void (*_webkit_reserved1) (void);
+    void (*_webkit_reserved2) (void);
+    void (*_webkit_reserved3) (void);
+};
+
+WEBKIT_API GType
+webkit_browser_inspector_get_type                     (void);
+
+WEBKIT_API WebKitBrowserInspector *
+webkit_browser_inspector_get_default                  (void);
+
+WEBKIT_API void
+webkit_browser_inspector_initialize_pipe              (const char* defaultProxyURI,
+                                                       const char* const* ignoreHosts);
+
+WEBKIT_API void
+webkit_browser_inspector_initialize_web_socket        (unsigned port,
+                                                       const char* defaultProxyURI,
+                                                       const char* const* ignoreHosts);
+
+G_END_DECLS
+
+#endif
diff --git a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.cpp b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.cpp
index 96170b6fd5f7dfc9ae97019f1dae74ee686f3a89..731d1aa724878543872a604c55da6b0affca45b6 100644
--- a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.cpp
+++ b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.cpp
@@ -56,6 +56,7 @@ struct _WebKitWebViewBackend {
     struct wpe_view_backend* backend;
     GDestroyNotify notifyCallback;
     gpointer notifyCallbackData;
+    take_screenshot_callback screenshotCallback;
     int referenceCount { 1 };
 };
 
@@ -118,6 +119,19 @@ struct wpe_view_backend* webkit_web_view_backend_get_wpe_backend(WebKitWebViewBa
     return viewBackend->backend;
 }
 
+void webkit_web_view_backend_set_screenshot_callback(WebKitWebViewBackend *view_backend, take_screenshot_callback callback)
+{
+    view_backend->screenshotCallback = callback;
+}
+
+PlatformImage webkitWebViewBackendTakeScreenshot(WebKitWebViewBackend* view_backend)
+{
+    if (!view_backend->screenshotCallback)
+        return nullptr;
+
+    return view_backend->screenshotCallback(view_backend->notifyCallbackData);
+}
+
 namespace WTF {
 WTF_DEFINE_GREF_TRAITS(WebKitWebViewBackend, webkitWebViewBackendRef, webkitWebViewBackendUnref)
 }
diff --git a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.h b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.h
index 16dcc1f69c38cd8ad630bc49d6d69feaa3aa811e..98677028c19c12c3b6d513bb5e45375a1528fe8a 100644
--- a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.h
+++ b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackend.h
@@ -28,6 +28,11 @@
 #include <wpe/WebKitDefines.h>
 #include <wpe/wpe.h>
 
+#if defined(USE_SKIA) && USE_SKIA
+#include <skia/core/SkImage.h>
+using PlatformImage = SkImage*;
+#endif
+
 G_BEGIN_DECLS
 
 #define WEBKIT_TYPE_WEB_VIEW_BACKEND (webkit_web_view_backend_get_type())
@@ -44,6 +49,12 @@ webkit_web_view_backend_new             (struct wpe_view_backend *backend,
 WEBKIT_API struct wpe_view_backend *
 webkit_web_view_backend_get_wpe_backend (WebKitWebViewBackend    *view_backend);
 
+typedef PlatformImage (*take_screenshot_callback)(gpointer              user_data);
+
+WEBKIT_API void
+webkit_web_view_backend_set_screenshot_callback   (WebKitWebViewBackend      *view_backend,
+                                                   take_screenshot_callback  callback);
+
 G_END_DECLS
 
 #endif /* WebKitWebViewBackend_h */
diff --git a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackendPrivate.h b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackendPrivate.h
index 21131a4d26ba115f3249b227d3e1dabd42398c80..7b1a6e98f3c1fb5ef5d54f416c49ba3e6188dcf4 100644
--- a/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackendPrivate.h
+++ b/Source/WebKit/UIProcess/API/wpe/WebKitWebViewBackendPrivate.h
@@ -32,3 +32,5 @@ WTF_DECLARE_GREF_TRAITS(WebKitWebViewBackend)
 void webkitWebViewBackendUnref(WebKitWebViewBackend*);
 
 #endif // USE(LIBWPE)
+
+PlatformImage webkitWebViewBackendTakeScreenshot(WebKitWebViewBackend*);
diff --git a/Source/WebKit/UIProcess/Automation/WebAutomationSession.h b/Source/WebKit/UIProcess/Automation/WebAutomationSession.h
index c38751ae3064aa6a42a3ed8fdb902f70473a8e08..f6bf1a674402bc08f69bccc97058954981ad4ebc 100644
--- a/Source/WebKit/UIProcess/Automation/WebAutomationSession.h
+++ b/Source/WebKit/UIProcess/Automation/WebAutomationSession.h
@@ -318,6 +318,8 @@ public:
 
     void didDestroyFrame(WebCore::FrameIdentifier);
 
+    static std::optional<String> platformGetBase64EncodedPNGData(const ViewSnapshot&);
+
     RefPtr<WebPageProxy> webPageProxyForHandle(const String&);
     String effectiveHandleForWebFrameProxy(const WebFrameProxy&);
     String handleForWebFrameID(std::optional<WebCore::FrameIdentifier>);
@@ -385,7 +387,6 @@ private:
 
     // Get base64-encoded PNG data from a bitmap.
     static std::optional<String> platformGetBase64EncodedPNGData(WebCore::ShareableBitmap::Handle&&);
-    static std::optional<String> platformGetBase64EncodedPNGData(const ViewSnapshot&);
 
     // Save base64-encoded file contents to a local file path and return the path.
     // This reuses the basename of the remote file path so that the filename exposed to DOM API remains the same.
diff --git a/Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp b/Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp
index d2e4f4cf05d2c7ce330319b4116c816c237df2dd..04e2e8d6125daf90a8c0c7aaa69e626f95b044d9 100644
--- a/Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp
+++ b/Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp
@@ -176,7 +176,11 @@ void AuxiliaryProcessProxy::getLaunchOptions(ProcessLauncher::LaunchOptions& lau
         launchOptions.processCmdPrefix = String::fromUTF8(processCmdPrefix);
 #endif // ENABLE(DEVELOPER_MODE) && (PLATFORM(GTK) || PLATFORM(WPE))
 
+/* playwright revert 50f8fee */
+#if 0
     populateOverrideLanguagesLaunchOptions(launchOptions);
+#endif
+/* end playwright revert 50f8fee */
 
     platformGetLaunchOptions(launchOptions);
 }
diff --git a/Source/WebKit/UIProcess/AuxiliaryProcessProxy.h b/Source/WebKit/UIProcess/AuxiliaryProcessProxy.h
index 0241fd8531d53a1f773e7c4a2c871e1903816eba..f199f4096d254ce0242c569db600554efac8c226 100644
--- a/Source/WebKit/UIProcess/AuxiliaryProcessProxy.h
+++ b/Source/WebKit/UIProcess/AuxiliaryProcessProxy.h
@@ -296,13 +296,16 @@ protected:
 
     InitializationActivityAndGrant initializationActivityAndGrant();
 
+    /* playwright revert 50f8fee - make protected to allow use from WebProcessProxy */
+    Vector<String> platformOverrideLanguages() const;
+    /* end playwright revert 50f8fee */
+
 private:
     virtual void connectionWillOpen(IPC::Connection&);
     virtual void processWillShutDown(IPC::Connection&) = 0;
     void outgoingMessageQueueIsGrowingLarge();
 
     void populateOverrideLanguagesLaunchOptions(ProcessLauncher::LaunchOptions&) const;
-    Vector<String> platformOverrideLanguages() const;
     void platformStartConnectionTerminationWatchdog();
 
     // Connection::Client
diff --git a/Source/WebKit/UIProcess/BackingStore.h b/Source/WebKit/UIProcess/BackingStore.h
index 15f1d5ff3973e173c1a3ee3eeb3bdf5e1ec4cd87..6516a47bc4aa788b1b1c09d21254ea9482190f6c 100644
--- a/Source/WebKit/UIProcess/BackingStore.h
+++ b/Source/WebKit/UIProcess/BackingStore.h
@@ -67,6 +67,11 @@ public:
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
     void paint(PlatformPaintContextPtr, const WebCore::IntRect&);
+#if PLATFORM(GTK)
+    RefPtr<cairo_surface_t> surface() const { return m_surface; }
+#elif USE(SKIA)
+    sk_sp<SkSurface> surface() const { return m_surface; }
+#endif
     void incorporateUpdate(UpdateInfo&&);
 
 private:
diff --git a/Source/WebKit/UIProcess/BrowserInspectorPipe.cpp b/Source/WebKit/UIProcess/BrowserInspectorPipe.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cfb57a48ce387b79613b757e2eb4de2c378aac30
--- /dev/null
+++ b/Source/WebKit/UIProcess/BrowserInspectorPipe.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "BrowserInspectorPipe.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgent.h"
+#include "InspectorPlaywrightAgentClient.h"
+#include "RemoteInspectorPipe.h"
+#include "WebKit2Initialize.h"
+#include <wtf/NeverDestroyed.h>
+
+namespace WebKit {
+
+void initializeBrowserInspectorPipe(std::unique_ptr<InspectorPlaywrightAgentClient> client)
+{
+    // Initialize main loop before creating inspecor agent and pipe queues.
+    WebKit::InitializeWebKit2();
+
+    class BrowserInspectorPipe {
+    public:
+        BrowserInspectorPipe(std::unique_ptr<InspectorPlaywrightAgentClient> client)
+            : m_playwrightAgent(std::move(client))
+            , m_remoteInspectorPipe(m_playwrightAgent)
+        {
+        }
+
+        InspectorPlaywrightAgent m_playwrightAgent;
+        RemoteInspectorPipe m_remoteInspectorPipe;
+    };
+
+    static NeverDestroyed<BrowserInspectorPipe> pipe(std::move(client));
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/BrowserInspectorPipe.h b/Source/WebKit/UIProcess/BrowserInspectorPipe.h
new file mode 100644
index 0000000000000000000000000000000000000000..cd66887de171cda7d15a8e4dc6dbff63665dc619
--- /dev/null
+++ b/Source/WebKit/UIProcess/BrowserInspectorPipe.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+namespace WebKit {
+
+class InspectorPlaywrightAgentClient;
+
+void initializeBrowserInspectorPipe(std::unique_ptr<InspectorPlaywrightAgentClient> client);
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/Cocoa/SOAuthorization/NavigationSOAuthorizationSession.h b/Source/WebKit/UIProcess/Cocoa/SOAuthorization/NavigationSOAuthorizationSession.h
index 45abb108899e19cfe0cecd6716083afbff03d73c..11ced1bb2d03c949cb31435eeeee2a196928a2de 100644
--- a/Source/WebKit/UIProcess/Cocoa/SOAuthorization/NavigationSOAuthorizationSession.h
+++ b/Source/WebKit/UIProcess/Cocoa/SOAuthorization/NavigationSOAuthorizationSession.h
@@ -31,6 +31,7 @@
 #include "WebViewDidMoveToWindowObserver.h"
 #include <wtf/CompletionHandler.h>
 #include <wtf/text/WTFString.h>
+#include <wtf/URL.h>
 
 namespace WebKit {
 
diff --git a/Source/WebKit/UIProcess/Cocoa/SOAuthorization/WKSOAuthorizationDelegate.h b/Source/WebKit/UIProcess/Cocoa/SOAuthorization/WKSOAuthorizationDelegate.h
index 89d125f7742f81ead8c50f218ecb1771b8000636..baa6cf58ad502c6c033ee6293a6cc8d4ce608e7b 100644
--- a/Source/WebKit/UIProcess/Cocoa/SOAuthorization/WKSOAuthorizationDelegate.h
+++ b/Source/WebKit/UIProcess/Cocoa/SOAuthorization/WKSOAuthorizationDelegate.h
@@ -25,6 +25,7 @@
 
 #if HAVE(APP_SSO)
 
+#import "SOAuthorizationSession.h"
 #import <pal/cocoa/AppSSOSoftLink.h>
 
 namespace WebKit {
diff --git a/Source/WebKit/UIProcess/Cocoa/UIDelegate.h b/Source/WebKit/UIProcess/Cocoa/UIDelegate.h
index 1c037ebba6c9cf3713e0936d4f2327d0d46a626e..e0f463694dea3aae9d8d01376ac62e75e9b0e826 100644
--- a/Source/WebKit/UIProcess/Cocoa/UIDelegate.h
+++ b/Source/WebKit/UIProcess/Cocoa/UIDelegate.h
@@ -105,6 +105,7 @@ private:
         void runJavaScriptAlert(WebPageProxy&, const WTF::String&, WebFrameProxy*, FrameInfoData&&, Function<void()>&& completionHandler) final;
         void runJavaScriptConfirm(WebPageProxy&, const WTF::String&, WebFrameProxy*, FrameInfoData&&, Function<void(bool)>&& completionHandler) final;
         void runJavaScriptPrompt(WebPageProxy&, const WTF::String&, const WTF::String&, WebFrameProxy*, FrameInfoData&&, Function<void(const WTF::String&)>&&) final;
+        void handleJavaScriptDialog(WebKit::WebPageProxy&, bool accept, const WTF::String&) final;
         void presentStorageAccessConfirmDialog(const WTF::String& requestingDomain, const WTF::String& currentDomain, CompletionHandler<void(bool)>&&);
         void requestStorageAccessConfirm(WebPageProxy&, WebFrameProxy*, const WebCore::RegistrableDomain& requestingDomain, const WebCore::RegistrableDomain& currentDomain, std::optional<WebCore::OrganizationStorageAccessPromptQuirk>&&, CompletionHandler<void(bool)>&&) final;
         void decidePolicyForGeolocationPermissionRequest(WebPageProxy&, WebFrameProxy&, const FrameInfoData&, Function<void(bool)>&) final;
@@ -233,6 +234,7 @@ private:
         bool webViewRunJavaScriptAlertPanelWithMessageInitiatedByFrameCompletionHandler : 1;
         bool webViewRunJavaScriptConfirmPanelWithMessageInitiatedByFrameCompletionHandler : 1;
         bool webViewRunJavaScriptTextInputPanelWithPromptDefaultTextInitiatedByFrameCompletionHandler : 1;
+        bool webViewHandleJavaScriptDialogValue : 1;
         bool webViewRequestStorageAccessPanelUnderFirstPartyCompletionHandler : 1;
         bool webViewRequestStorageAccessPanelForDomainUnderCurrentDomainForQuirkDomainsCompletionHandler : 1;
         bool webViewRunBeforeUnloadConfirmPanelWithMessageInitiatedByFrameCompletionHandler : 1;
diff --git a/Source/WebKit/UIProcess/Cocoa/UIDelegate.mm b/Source/WebKit/UIProcess/Cocoa/UIDelegate.mm
index c660d8204b89997bb25637ed24198acf5028e280..6d7c9102b1bc57fd179ba742cf703b1bf3eaf5af 100644
--- a/Source/WebKit/UIProcess/Cocoa/UIDelegate.mm
+++ b/Source/WebKit/UIProcess/Cocoa/UIDelegate.mm
@@ -136,6 +136,7 @@ void UIDelegate::setDelegate(id<WKUIDelegate> delegate)
     m_delegateMethods.webViewRunJavaScriptAlertPanelWithMessageInitiatedByFrameCompletionHandler = [delegate respondsToSelector:@selector(webView:runJavaScriptAlertPanelWithMessage:initiatedByFrame:completionHandler:)];
     m_delegateMethods.webViewRunJavaScriptConfirmPanelWithMessageInitiatedByFrameCompletionHandler = [delegate respondsToSelector:@selector(webView:runJavaScriptConfirmPanelWithMessage:initiatedByFrame:completionHandler:)];
     m_delegateMethods.webViewRunJavaScriptTextInputPanelWithPromptDefaultTextInitiatedByFrameCompletionHandler = [delegate respondsToSelector:@selector(webView:runJavaScriptTextInputPanelWithPrompt:defaultText:initiatedByFrame:completionHandler:)];
+    m_delegateMethods.webViewHandleJavaScriptDialogValue = [delegate respondsToSelector:@selector(webView:handleJavaScriptDialog:value:)];
     m_delegateMethods.webViewRequestStorageAccessPanelUnderFirstPartyCompletionHandler = [delegate respondsToSelector:@selector(_webView:requestStorageAccessPanelForDomain:underCurrentDomain:completionHandler:)];
     m_delegateMethods.webViewRequestStorageAccessPanelForDomainUnderCurrentDomainForQuirkDomainsCompletionHandler = [delegate respondsToSelector:@selector(_webView:requestStorageAccessPanelForDomain:underCurrentDomain:forQuirkDomains:completionHandler:)];
     m_delegateMethods.webViewRunBeforeUnloadConfirmPanelWithMessageInitiatedByFrameCompletionHandler = [delegate respondsToSelector:@selector(_webView:runBeforeUnloadConfirmPanelWithMessage:initiatedByFrame:completionHandler:)];
@@ -502,6 +503,15 @@ void UIDelegate::UIClient::runJavaScriptPrompt(WebPageProxy& page, const WTF::St
     }).get()];
 }
 
+void UIDelegate::UIClient::handleJavaScriptDialog(WebKit::WebPageProxy&, bool accept, const WTF::String& value) {
+    if (!m_uiDelegate->m_delegateMethods.webViewHandleJavaScriptDialogValue)
+        return;
+    auto delegate = m_uiDelegate->m_delegate.get();
+    if (!delegate)
+        return;
+    [delegate webView:m_uiDelegate->m_webView.get().get() handleJavaScriptDialog:accept value:value.createNSString().get()];
+}
+
 void UIDelegate::UIClient::requestStorageAccessConfirm(WebPageProxy& webPageProxy, WebFrameProxy*, const WebCore::RegistrableDomain& requestingDomain, const WebCore::RegistrableDomain& currentDomain, std::optional<WebCore::OrganizationStorageAccessPromptQuirk>&& organizationStorageAccessPromptQuirk, CompletionHandler<void(bool)>&& completionHandler)
 {
     RefPtr uiDelegate = m_uiDelegate.get();
diff --git a/Source/WebKit/UIProcess/Cocoa/WebPageProxyCocoa.mm b/Source/WebKit/UIProcess/Cocoa/WebPageProxyCocoa.mm
index 177ac869fe4128bb459d2577d90f6b208e8395a2..e6ade97d800a2119d4abd9e241186915c432fd9c 100644
--- a/Source/WebKit/UIProcess/Cocoa/WebPageProxyCocoa.mm
+++ b/Source/WebKit/UIProcess/Cocoa/WebPageProxyCocoa.mm
@@ -45,7 +45,9 @@
 #import "NativeWebKeyboardEvent.h"
 #import "NativeWebMouseEvent.h"
 #import "NavigationState.h"
+#import "NetworkProcessMessages.h"
 #import "PageClient.h"
+#import "PasteboardTypes.h"
 #import "PlatformXRSystem.h"
 #import "PlaybackSessionManagerProxy.h"
 #import "RemoteLayerTreeCommitBundle.h"
@@ -446,11 +448,85 @@ bool WebPageProxy::scrollingUpdatesDisabledForTesting()
 
 void WebPageProxy::startDrag(const DragItem& dragItem, ShareableBitmap::Handle&& dragImageHandle, const std::optional<NodeIdentifier>& nodeID, const std::optional<FrameIdentifier>& frameID)
 {
+    if (m_interceptDrags) {
+        NSPasteboard *pasteboard = [NSPasteboard pasteboardWithName: m_overrideDragPasteboardName.createNSString().get()];
+
+        m_dragSelectionData = String([pasteboard name]);
+        if (auto replyID = grantAccessToCurrentPasteboardData(String([pasteboard name]), [] () { }))
+            protect(websiteDataStore().networkProcess())->connection().waitForAsyncReplyAndDispatchImmediately<Messages::NetworkProcess::AllowFilesAccessFromWebProcess>(*replyID, 100_ms);
+        m_dragSourceOperationMask = WebCore::anyDragOperation();
+
+        if (auto& info = dragItem.promisedAttachmentInfo) {
+            auto attachment = attachmentForIdentifier(info.attachmentIdentifier);
+            if (!attachment) {
+                dragCancelled();
+                return;
+            }
+            if (!attachment->utiType().createNSString().get().length) {
+                dragCancelled();
+                return;
+            }
+
+            for (size_t index = 0; index < info.additionalTypesAndData.size(); ++index) {
+                auto nsData = info.additionalTypesAndData[index].second->createNSData();
+                [pasteboard setData:nsData.get() forType:info.additionalTypesAndData[index].first.createNSString().get()];
+            }
+        } else {
+            [pasteboard setString:@"" forType:PasteboardTypes::WebDummyPboardType];
+        }
+        didStartDrag();
+        return;
+    }
+
     if (RefPtr pageClient = this->pageClient())
         pageClient->startDrag(dragItem, WTF::move(dragImageHandle), nodeID, frameID);
 }
 
-#endif
+void WebPageProxy::releaseInspectorDragPasteboard() {
+    if (!!m_dragSelectionData)
+        m_dragSelectionData = std::nullopt;
+    if (!m_overrideDragPasteboardName.isEmpty()) {
+        NSPasteboard *pasteboard = [NSPasteboard pasteboardWithUniqueName];
+        [pasteboard releaseGlobally];
+        m_overrideDragPasteboardName = ""_s;
+    }
+}
+
+
+void WebPageProxy::setInterceptDrags(bool shouldIntercept) {
+    m_interceptDrags = shouldIntercept;
+    if (m_interceptDrags) {
+        if (m_overrideDragPasteboardName.isEmpty()) {
+            NSPasteboard *pasteboard = [NSPasteboard pasteboardWithUniqueName];
+            m_overrideDragPasteboardName = String([pasteboard name]);
+        }
+        legacyMainFrameProcess().send(Messages::WebPage::SetDragPasteboardName(m_overrideDragPasteboardName), webPageIDInMainFrameProcess());
+    } else {
+        legacyMainFrameProcess().send(Messages::WebPage::SetDragPasteboardName(""_s), webPageIDInMainFrameProcess());
+    }
+}
+
+// FIXME: Move these functions to WebPageProxyIOS.mm.
+#if PLATFORM(IOS_FAMILY)
+
+void WebPageProxy::setPromisedDataForImage(const String&, const SharedMemory::Handle&, const String&, const String&, const String&, const String&, const String&, const SharedMemory::Handle&, const String&)
+{
+    notImplemented();
+}
+
+void WebPageProxy::setDragCaretRect(const IntRect& dragCaretRect)
+{
+    if (m_currentDragCaretRect == dragCaretRect)
+        return;
+
+    auto previousRect = m_currentDragCaretRect;
+    m_currentDragCaretRect = dragCaretRect;
+    pageClient()->didChangeDragCaretRect(previousRect, dragCaretRect);
+}
+
+#endif // PLATFORM(IOS_FAMILY)
+
+#endif // ENABLE(DRAG_SUPPORT)
 
 #if ENABLE(ATTACHMENT_ELEMENT)
 
diff --git a/Source/WebKit/UIProcess/Cocoa/WebProcessPoolCocoa.mm b/Source/WebKit/UIProcess/Cocoa/WebProcessPoolCocoa.mm
index 4b43164f215ca8e72a68252f36862e25b2742ea8..0804791f8ef0174b905cb18851962f04b43151e4 100644
--- a/Source/WebKit/UIProcess/Cocoa/WebProcessPoolCocoa.mm
+++ b/Source/WebKit/UIProcess/Cocoa/WebProcessPoolCocoa.mm
@@ -451,7 +451,7 @@ ALLOW_DEPRECATED_DECLARATIONS_END
     auto screenProperties = WebCore::collectScreenProperties();
     parameters.screenProperties = WTF::move(screenProperties);
 #if PLATFORM(MAC)
-    parameters.useOverlayScrollbars = ([NSScroller preferredScrollerStyle] == NSScrollerStyleOverlay);
+    parameters.useOverlayScrollbars = m_configuration->forceOverlayScrollbars() || ([NSScroller preferredScrollerStyle] == NSScrollerStyleOverlay);
 #endif
 
 #if PLATFORM(VISION)
@@ -864,8 +864,8 @@ void WebProcessPool::registerNotificationObservers()
     }];
 
     m_scrollerStyleNotificationObserver = [[NSNotificationCenter defaultCenter] addObserverForName:NSPreferredScrollerStyleDidChangeNotification object:nil queue:[NSOperationQueue currentQueue] usingBlock:^(NSNotification *notification) {
-        auto scrollbarStyle = [NSScroller preferredScrollerStyle];
-        sendToAllProcesses(Messages::WebProcess::ScrollerStylePreferenceChanged(scrollbarStyle));
+        bool useOverlayScrollbars = m_configuration->forceOverlayScrollbars() || ([NSScroller preferredScrollerStyle] == NSScrollerStyleOverlay);
+        sendToAllProcesses(Messages::WebProcess::ScrollerStylePreferenceChanged(useOverlayScrollbars));
     }];
 
     m_activationObserver = [[NSNotificationCenter defaultCenter] addObserverForName:NSApplicationDidBecomeActiveNotification object:NSAppSingleton() queue:[NSOperationQueue currentQueue] usingBlock:^(NSNotification *notification) {
diff --git a/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.cpp b/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.cpp
index be40fa0e3e3e8698c29f70a2b8dac324225aba97..4e6cc206ed0a25914d8df604f61746562fd9c976 100644
--- a/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.cpp
+++ b/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.cpp
@@ -33,6 +33,7 @@
 #include "LayerTreeContext.h"
 #include "MessageSenderInlines.h"
 #include "UpdateInfo.h"
+#include "WebPageInspectorController.h"
 #include "WebPageProxy.h"
 #include "WebPreferences.h"
 #include "WebProcessPool.h"
@@ -40,6 +41,15 @@
 #include <WebCore/Region.h>
 #include <optional>
 #include <wtf/TZoneMallocInlines.h>
+#include <wtf/Vector.h>
+
+#if PLATFORM(GTK)
+#include "WebKitWebViewBasePrivate.h"
+#include <cairo.h>
+#include <skia/core/SkImage.h>
+#include <skia/core/SkSurface.h>
+#include <skia/core/SkCanvas.h>
+#endif
 
 #if USE(GLIB_EVENT_LOOP)
 #include <wtf/glib/RunLoopSourcePriority.h>
@@ -175,6 +185,11 @@ void DrawingAreaProxyCoordinatedGraphics::deviceScaleFactorDidChange(CompletionH
     sendWithAsyncReply(Messages::DrawingArea::SetDeviceScaleFactor(page()->deviceScaleFactor()), WTF::move(completionHandler));
 }
 
+void DrawingAreaProxyCoordinatedGraphics::waitForSizeUpdate(Function<void (const DrawingAreaProxyCoordinatedGraphics&)>&& callback)
+{
+    m_callbacks.append(WTF::move(callback));
+}
+
 void DrawingAreaProxyCoordinatedGraphics::setBackingStoreIsDiscardable(bool isBackingStoreDiscardable)
 {
 #if !PLATFORM(WPE) && !PLATFORM(GTK)
@@ -234,6 +249,54 @@ void DrawingAreaProxyCoordinatedGraphics::updateAcceleratedCompositingMode(uint6
     updateAcceleratedCompositingMode(layerTreeContext);
 }
 
+#if PLATFORM(GTK)
+void DrawingAreaProxyCoordinatedGraphics::captureFrame()
+{
+    RefPtr<cairo_surface_t> surface;
+    if (isInAcceleratedCompositingMode()) {
+        AcceleratedBackingStore* backingStore = webkitWebViewBaseGetAcceleratedBackingStore(WEBKIT_WEB_VIEW_BASE(protect(page())->viewWidget()));
+        if (!backingStore)
+            return;
+
+        surface = backingStore->surface();
+    }
+
+    if (!surface)
+        return;
+
+    if (cairo_surface_get_type(surface.get()) != CAIRO_SURFACE_TYPE_IMAGE)
+        return;
+
+    // The original surface is upside down, so we flip it to match orientation in other accelerated backing stores.
+    auto flippedSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, cairo_image_surface_get_width(surface.get()), cairo_image_surface_get_height(surface.get())));
+    {
+        RefPtr<cairo_t> cr = adoptRef(cairo_create(flippedSurface.get()));
+        cairo_matrix_t transform;
+        cairo_matrix_init(&transform, 1, 0, 0, -1, 0, cairo_image_surface_get_height(surface.get()));
+        cairo_transform(cr.get(), &transform);
+        cairo_set_source_surface(cr.get(), surface.get(), 0, 0);
+        cairo_paint(cr.get());
+    }
+    cairo_surface_flush(flippedSurface.get());
+
+    unsigned char* data   = cairo_image_surface_get_data(flippedSurface.get());
+    int width             = cairo_image_surface_get_width(flippedSurface.get());
+    int height            = cairo_image_surface_get_height(flippedSurface.get());
+    int stride            = cairo_image_surface_get_stride(flippedSurface.get());
+
+    SkImageInfo info = SkImageInfo::Make(
+        width, height,
+        kBGRA_8888_SkColorType,  // matches CAIRO_FORMAT_ARGB32 on LE
+        kPremul_SkAlphaType
+    );
+    sk_sp<SkImage> skImage = SkImages::RasterFromData(info, SkData::MakeWithCopy(data, height * stride), stride);
+    if (!skImage)
+        return;
+
+    protect(page())->inspectorController().didPaint(WTF::move(skImage));
+}
+#endif // PLATFORM(GTK)
+
 bool DrawingAreaProxyCoordinatedGraphics::alwaysUseCompositing() const
 {
     if (!page())
@@ -301,6 +364,12 @@ void DrawingAreaProxyCoordinatedGraphics::didUpdateGeometry()
     // we need to resend the new size here.
     if (m_lastSentSize != size())
         sendUpdateGeometry();
+    else {
+        Vector<Function<void (const DrawingAreaProxyCoordinatedGraphics&)>> callbacks;
+        callbacks.swap(m_callbacks);
+        for (auto& cb : callbacks)
+            cb(*this);
+    }
 }
 
 #if !PLATFORM(WPE) && !PLATFORM(GTK)
diff --git a/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.h b/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.h
index 99a1c243ee534edf127f6f932e4d05cb65676528..d880229ef91bfd33e37b5065976fbe3c7f6dc443 100644
--- a/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.h
+++ b/Source/WebKit/UIProcess/CoordinatedGraphics/DrawingAreaProxyCoordinatedGraphics.h
@@ -29,6 +29,7 @@
 
 #include "DrawingAreaProxy.h"
 #include "LayerTreeContext.h"
+#include <wtf/Function.h>
 #include <wtf/RefCounted.h>
 #include <wtf/RunLoop.h>
 #include <wtf/TZoneMalloc.h>
@@ -60,6 +61,10 @@ public:
 
     bool isInAcceleratedCompositingMode() const { return !m_layerTreeContext.isEmpty(); }
     const LayerTreeContext& layerTreeContext() const LIFETIME_BOUND { return m_layerTreeContext; }
+    void waitForSizeUpdate(Function<void (const DrawingAreaProxyCoordinatedGraphics&)>&&);
+#if !PLATFORM(WPE)
+    void captureFrame();
+#endif
 
     void dispatchAfterEnsuringDrawing(CompletionHandler<void()>&&);
 
@@ -131,6 +136,7 @@ private:
     // The last size we sent to the web process.
     WebCore::IntSize m_lastSentSize;
 
+    Vector<Function<void (const DrawingAreaProxyCoordinatedGraphics&)>> m_callbacks;
 
 #if !PLATFORM(WPE) && !PLATFORM(GTK)
     bool m_isBackingStoreDiscardable { true };
diff --git a/Source/WebKit/UIProcess/Downloads/DownloadProxy.cpp b/Source/WebKit/UIProcess/Downloads/DownloadProxy.cpp
index 6537111d8f973509b072b3ec0da911d9c1d24f1d..206023b88f3bb0f7b14bcc7600679bce11a9053a 100644
--- a/Source/WebKit/UIProcess/Downloads/DownloadProxy.cpp
+++ b/Source/WebKit/UIProcess/Downloads/DownloadProxy.cpp
@@ -41,8 +41,10 @@
 #include <WebCore/MIMETypeRegistry.h>
 #include <WebCore/ResourceResponseBase.h>
 #include <wtf/FileSystem.h>
+#include <wtf/NeverDestroyed.h>
 #include <wtf/text/CString.h>
 #include <wtf/text/WTFString.h>
+#include <wtf/UUID.h>
 
 #if PLATFORM(MAC)
 #include <pal/spi/mac/QuarantineSPI.h>
@@ -66,7 +68,10 @@ DownloadProxy::DownloadProxy(DownloadProxyMap& downloadProxyMap, WebsiteDataStor
 #if HAVE(MODERN_DOWNLOADPROGRESS)
     , m_assertion(ProcessAssertion::create(getCurrentProcessID(), "WebKit DownloadProxy DecideDestination"_s, ProcessAssertionType::FinishTaskInterruptable))
 #endif
+    , m_uuid(createVersion4UUIDString())
 {
+    if (auto* instrumentation = m_dataStore->downloadInstrumentation())
+      instrumentation->downloadCreated(m_uuid, m_request, m_frameInfo->frameInfoData(), originatingPage, this);
 }
 
 DownloadProxy::~DownloadProxy()
@@ -86,12 +91,15 @@ void DownloadProxy::cancel(CompletionHandler<void(API::Data*)>&& completionHandl
 {
     m_downloadIsCancelled = true;
     if (m_dataStore) {
-        protect(protect(m_dataStore)->networkProcess())->sendWithAsyncReply(Messages::NetworkProcess::CancelDownload(m_downloadID), [weakThis = WeakPtr { *this }, completionHandler = WTF::move(completionHandler)] (std::span<const uint8_t> resumeData) mutable {
+        auto* instrumentation = m_dataStore->downloadInstrumentation();
+        protect(protect(m_dataStore)->networkProcess())->sendWithAsyncReply(Messages::NetworkProcess::CancelDownload(m_downloadID), [weakThis = WeakPtr { *this }, completionHandler = WTF::move(completionHandler), instrumentation] (std::span<const uint8_t> resumeData) mutable {
             RefPtr protectedThis = weakThis.get();
             if (!protectedThis)
                 return completionHandler(nullptr);
             protectedThis->m_legacyResumeData = createData(resumeData);
             completionHandler(protectedThis->m_legacyResumeData.get());
+            if (instrumentation)
+                instrumentation->downloadFinished(protectedThis->m_uuid, "canceled"_s);
             if (RefPtr downloadProxyMap = protectedThis->m_downloadProxyMap.get())
                 downloadProxyMap->downloadFinished(*protectedThis);
         });
@@ -182,6 +190,35 @@ void DownloadProxy::decideDestinationWithSuggestedFilename(const WebCore::Resour
     else
         suggestedFilename = MIMETypeRegistry::appendFileExtensionIfNecessary(suggestedFilename, response.mimeType());
 
+    if (auto* instrumentation = m_dataStore->downloadInstrumentation())
+      instrumentation->downloadFilenameSuggested(m_uuid, suggestedFilename);
+
+    if (m_dataStore->allowDownloadForAutomation()) {
+        SandboxExtension::Handle sandboxExtensionHandle;
+        String destination;
+        if (*m_dataStore->allowDownloadForAutomation()) {
+            auto downloadPath = m_dataStore->downloadPathForAutomation();
+            FileSystem::makeAllDirectories(downloadPath);
+            destination = FileSystem::pathByAppendingComponent(downloadPath, m_uuid);
+            if (auto handle = SandboxExtension::createHandle(destination, SandboxExtension::Type::ReadWrite))
+                sandboxExtensionHandle = WTF::move(*handle);
+        }
+        m_client->decidePlaceholderPolicy(*this, [completionHandler = WTF::move(completionHandler), destination = WTF::move(destination), sandboxExtensionHandle = WTF::move(sandboxExtensionHandle)] (WebKit::UseDownloadPlaceholder usePlaceholder, const URL& url) mutable {
+            SandboxExtension::Handle placeHolderSandboxExtensionHandle;
+            Vector<uint8_t> bookmarkData;
+            Vector<uint8_t> activityTokenData;
+#if HAVE(MODERN_DOWNLOADPROGRESS)
+            bookmarkData = bookmarkDataForURL(url);
+            activityTokenData = activityAccessToken();
+#else
+            if (auto handle = SandboxExtension::createHandle(url.fileSystemPath(), SandboxExtension::Type::ReadWrite))
+                placeHolderSandboxExtensionHandle = WTF::move(*handle);
+#endif
+            completionHandler(destination, WTF::move(sandboxExtensionHandle), AllowOverwrite::Yes, WebKit::UseDownloadPlaceholder::No, url, WTF::move(placeHolderSandboxExtensionHandle), bookmarkData.span(), activityTokenData.span());
+        });
+        return;
+    }
+
     protect(client())->decideDestinationWithSuggestedFilename(*this, response, ResourceResponseBase::sanitizeSuggestedFilename(suggestedFilename), [this, protectedThis = Ref { *this }, completionHandler = WTF::move(completionHandler)] (AllowOverwrite allowOverwrite, String destination) mutable {
         SandboxExtension::Handle sandboxExtensionHandle;
         if (!destination.isNull()) {
@@ -246,6 +283,8 @@ void DownloadProxy::didFinish()
     protect(client())->didFinish(*this);
     if (m_downloadIsCancelled)
         return;
+    if (auto* instrumentation = m_dataStore->downloadInstrumentation())
+      instrumentation->downloadFinished(m_uuid, String());
 
     // This can cause the DownloadProxy object to be deleted.
     if (RefPtr downloadProxyMap = m_downloadProxyMap.get())
@@ -260,6 +299,8 @@ void DownloadProxy::didFail(const ResourceError& error, std::span<const uint8_t>
     m_legacyResumeData = createData(resumeData);
 
     protect(client())->didFail(*this, error, m_legacyResumeData.get());
+    if (auto* instrumentation = m_dataStore->downloadInstrumentation())
+      instrumentation->downloadFinished(m_uuid, error.localizedDescription());
 
     // This can cause the DownloadProxy object to be deleted.
     if (RefPtr downloadProxyMap = m_downloadProxyMap.get())
diff --git a/Source/WebKit/UIProcess/Downloads/DownloadProxy.h b/Source/WebKit/UIProcess/Downloads/DownloadProxy.h
index be567b89bb406f0ee0df005c83b186cb956025ae..16342e90dcbf94325b8fac5f4c877c5fd372f673 100644
--- a/Source/WebKit/UIProcess/Downloads/DownloadProxy.h
+++ b/Source/WebKit/UIProcess/Downloads/DownloadProxy.h
@@ -168,6 +168,7 @@ private:
 #if HAVE(MODERN_DOWNLOADPROGRESS)
     RefPtr<ProcessAssertion> m_assertion;
 #endif
+    String m_uuid;
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/UIProcess/DrawingAreaProxy.h b/Source/WebKit/UIProcess/DrawingAreaProxy.h
index 546c51f13212c98bf9a26bf1ee804c74d75f241e..e681ec646dd033ade64bae6eabdc472e9e0b8c6a 100644
--- a/Source/WebKit/UIProcess/DrawingAreaProxy.h
+++ b/Source/WebKit/UIProcess/DrawingAreaProxy.h
@@ -96,6 +96,7 @@ public:
 
     const WebCore::IntSize& size() const LIFETIME_BOUND { return m_size; }
     bool setSize(const WebCore::IntSize&, const WebCore::IntSize& scrollOffset = { });
+    void waitForSizeUpdate(Function<void ()>&&);
 
     virtual void minimumSizeForAutoLayoutDidChange() { }
     virtual void sizeToContentAutoSizeMaximumSizeDidChange() { }
diff --git a/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.cpp b/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6a89043bb0b8f6a22ee9af2b271de34989e6a5c1
--- /dev/null
+++ b/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.cpp
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorScreencastAgent.h"
+
+#include "PageClient.h"
+#include "WebPageInspectorController.h"
+#include "WebPageProxy.h"
+#include "WebsiteDataStore.h"
+#include <pal/crypto/CryptoDigest.h>
+#include <JavaScriptCore/InspectorFrontendRouter.h>
+#include <WebCore/NotImplemented.h>
+#include <wtf/Compiler.h>
+#include <wtf/RunLoop.h>
+#include <wtf/UUID.h>
+#include <wtf/text/Base64.h>
+
+#if USE(SKIA)
+#include "DrawingAreaProxyCoordinatedGraphics.h"
+#include "DrawingAreaProxy.h"
+#include <skia/core/SkBitmap.h>
+#include <skia/core/SkCanvas.h>
+#include <skia/core/SkImage.h>
+#include <skia/core/SkPixmap.h>
+#include <skia/core/SkData.h>
+#include <skia/core/SkStream.h>
+#include <skia/encode/SkJpegEncoder.h>
+#endif
+
+#if PLATFORM(MAC)
+#include <WebCore/ImageUtilities.h>
+#endif
+
+#if PLATFORM(WIN)
+#include "DrawingAreaProxyWC.h"
+#endif
+
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
+
+namespace WebKit {
+
+const int kMaxFramesInFlight = 1;
+
+using namespace Inspector;
+
+WTF_MAKE_TZONE_ALLOCATED_IMPL(InspectorScreencastAgent);
+
+InspectorScreencastAgent::InspectorScreencastAgent(BackendDispatcher& backendDispatcher, Inspector::FrontendRouter& frontendRouter, WebPageProxy& page)
+    : InspectorAgentBase("Screencast"_s)
+    , m_frontendDispatcher(makeUnique<ScreencastFrontendDispatcher>(frontendRouter))
+    , m_backendDispatcher(ScreencastBackendDispatcher::create(backendDispatcher, this))
+    , m_page(page)
+{
+}
+
+InspectorScreencastAgent::~InspectorScreencastAgent()
+{
+}
+
+void InspectorScreencastAgent::didCreateFrontendAndBackend()
+{
+}
+
+void InspectorScreencastAgent::willDestroyFrontendAndBackend(DisconnectReason)
+{
+}
+
+#if USE(SKIA)
+void InspectorScreencastAgent::didPaint(sk_sp<SkImage>&& surface)
+{
+    if (!m_screencast)
+        return;
+
+    if (m_screencastFramesInFlight > kMaxFramesInFlight)
+        return;
+
+    MonotonicTime timestamp = MonotonicTime::now();
+    sk_sp<SkImage> image(surface);
+
+    // Get actual image size (in device pixels).
+    WebCore::IntSize displaySize(image->width(), image->height());
+    WebCore::IntSize drawingAreaSize = m_page.drawingArea()->size();
+    drawingAreaSize.scale(m_page.deviceScaleFactor());
+    if (drawingAreaSize != displaySize)
+        return;
+
+    {
+        SkPixmap pixmap;
+        if (!image->peekPixels(&pixmap)) {
+            fprintf(stderr, "Failed to peek pixels from SkImage to compute hash\n");
+            return;
+        }
+        // Do not send the same frame over and over.
+        size_t len = pixmap.computeByteSize();
+        auto cryptoDigest = PAL::Crypto::CryptoDigest::create(PAL::Crypto::CryptoDigest::Algorithm::SHA_1);
+        cryptoDigest->addBytes(std::span(reinterpret_cast<const unsigned char*>(pixmap.addr()), len));
+        auto digest = cryptoDigest->computeHash();
+        if (m_lastFrameDigest == digest)
+            return;
+        m_lastFrameDigest = digest;
+    }
+
+    // Scale image to fit width / height
+    double scale = std::min(m_screencastWidth / displaySize.width(), m_screencastHeight / displaySize.height());
+    if (scale < 1) {
+        SkBitmap dstBitmap;
+        dstBitmap.allocPixels(SkImageInfo::MakeN32Premul(displaySize.width() * scale, displaySize.height() * scale));
+        SkCanvas canvas(dstBitmap);
+        canvas.scale(scale, scale);
+        canvas.drawImage(image, 0, 0);
+        image = dstBitmap.asImage();
+    }
+
+    SkPixmap pixmap;
+    if (!image->peekPixels(&pixmap)) {
+        fprintf(stderr, "Failed to peek pixels from SkImage for JPEG encoding\n");
+        return;
+    }
+
+    SkJpegEncoder::Options options;
+    options.fQuality = 90;
+    SkDynamicMemoryWStream stream;
+    if (!SkJpegEncoder::Encode(&stream, pixmap, options)) {
+        fprintf(stderr, "Failed to encode image to JPEG\n");
+        return;
+    }
+    sk_sp<SkData> jpegData = stream.detachAsData();
+    String result = base64EncodeToString(std::span(reinterpret_cast<const unsigned char*>(jpegData->data()), jpegData->size()));
+    ++m_screencastFramesInFlight;
+    m_frontendDispatcher->screencastFrame(result, timestamp.secondsSinceEpoch().value(), displaySize.width(), displaySize.height());
+}
+#endif
+
+Inspector::Protocol::ErrorStringOr<int /* generation */> InspectorScreencastAgent::startScreencast(int width, int height, int toolbarHeight, int quality)
+{
+    if (m_screencast)
+        return makeUnexpected("Already screencasting"_s);
+
+    m_screencast = true;
+    m_screencastWidth = width;
+    m_screencastHeight = height;
+    m_screencastQuality = quality;
+    m_screencastToolbarHeight = toolbarHeight;
+    ++m_screencastGeneration;
+    kickFramesStarted();
+    return m_screencastGeneration;
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorScreencastAgent::screencastFrameAck(int generation)
+{
+    if (!m_screencast)
+        return makeUnexpected("Not screencasting"_s);
+
+    if (m_screencastGeneration != generation)
+        return { };
+
+    --m_screencastFramesInFlight;
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorScreencastAgent::stopScreencast()
+{
+    if (!m_screencast)
+        return makeUnexpected("Not screencasting"_s);
+
+    m_screencast = false;
+    m_framesAreGoing = false;
+    m_screencastFramesInFlight = 0;
+    m_lastFrameDigest.clear();
+    return { };
+}
+
+void InspectorScreencastAgent::kickFramesStarted()
+{
+    if (!m_framesAreGoing) {
+        m_framesAreGoing = true;
+#if !PLATFORM(WPE)
+        scheduleFrameEncoding();
+#endif
+    }
+    m_page.updateRenderingWithForcedRepaint([] { });
+}
+
+#if !PLATFORM(WPE)
+void InspectorScreencastAgent::scheduleFrameEncoding()
+{
+    if (!m_screencast)
+        return;
+
+    const int fps = 25;
+    RunLoop::mainSingleton().dispatchAfter(Seconds(1.0 / fps), [agent = WeakPtr { this }]() mutable {
+        if (!agent)
+            return;
+        if (!agent->m_page.hasPageClient())
+            return;
+
+        agent->encodeFrame();
+        agent->scheduleFrameEncoding();
+    });
+}
+#endif
+
+#if PLATFORM(MAC)
+void InspectorScreencastAgent::encodeFrame()
+{
+    if (!m_screencast)
+        return;
+
+    RetainPtr<CGImageRef> imageRef = m_page.pageClient()->takeSnapshotForAutomation();
+    if (m_screencast && m_screencastFramesInFlight <= kMaxFramesInFlight) {
+        MonotonicTime timestamp = MonotonicTime::now();
+        CGImage* imagePtr = imageRef.get();
+        WebCore::IntSize imageSize(CGImageGetWidth(imagePtr), CGImageGetHeight(imagePtr));
+        WebCore::IntSize displaySize = imageSize;
+        displaySize.contract(0, m_screencastToolbarHeight);
+        double scale = std::min(m_screencastWidth / displaySize.width(), m_screencastHeight / displaySize.height());
+        RetainPtr<CGImageRef> transformedImageRef;
+        if (scale < 1 || m_screencastToolbarHeight) {
+            WebCore::IntSize screencastSize = displaySize;
+            WebCore::IntSize scaledImageSize = imageSize;
+            if (scale < 1) {
+                screencastSize.scale(scale);
+                scaledImageSize.scale(scale);
+            }
+            auto colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
+            auto context = adoptCF(CGBitmapContextCreate(nullptr, screencastSize.width(), screencastSize.height(), 8, 4 * screencastSize.width(), colorSpace.get(), (CGBitmapInfo)kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
+            CGContextDrawImage(context.get(), CGRectMake(0, 0, scaledImageSize.width(), scaledImageSize.height()), imagePtr);
+            transformedImageRef = adoptCF(CGBitmapContextCreateImage(context.get()));
+            imagePtr = transformedImageRef.get();
+        }
+        auto data = WebCore::encodeData(imagePtr, "image/jpeg"_s, m_screencastQuality * 0.1);
+
+        // Do not send the same frame over and over.
+        auto cryptoDigest = PAL::Crypto::CryptoDigest::create(PAL::Crypto::CryptoDigest::Algorithm::SHA_1);
+        cryptoDigest->addBytes(std::span(data.mutableSpan().data(), data.size()));
+        auto digest = cryptoDigest->computeHash();
+        if (m_lastFrameDigest != digest) {
+            String base64Data = base64EncodeToString(data);
+            ++m_screencastFramesInFlight;
+            m_frontendDispatcher->screencastFrame(base64Data, timestamp.secondsSinceEpoch().value(), displaySize.width(), displaySize.height());
+            m_lastFrameDigest = digest;
+        }
+    }
+}
+#endif
+
+#if PLATFORM(GTK)
+void InspectorScreencastAgent::encodeFrame()
+{
+    if (!m_screencast)
+        return;
+
+    if (auto* drawingArea = m_page.drawingArea())
+        static_cast<DrawingAreaProxyCoordinatedGraphics*>(drawingArea)->captureFrame();
+}
+#endif
+
+#if PLATFORM(WIN)
+void InspectorScreencastAgent::encodeFrame()
+{
+    if (!m_screencast)
+        return;
+
+    if (auto* drawingArea = m_page.drawingArea())
+        static_cast<DrawingAreaProxyWC*>(drawingArea)->captureFrame();
+}
+#endif
+
+} // namespace WebKit
+
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
diff --git a/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.h b/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.h
new file mode 100644
index 0000000000000000000000000000000000000000..afadd2371dffab9d4b92e4245f5622828c8fded1
--- /dev/null
+++ b/Source/WebKit/UIProcess/Inspector/Agents/InspectorScreencastAgent.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <JavaScriptCore/InspectorAgentBase.h>
+#include <JavaScriptCore/InspectorBackendDispatchers.h>
+#include <JavaScriptCore/InspectorFrontendDispatchers.h>
+
+#include <wtf/Forward.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/WeakPtr.h>
+
+#if USE(SKIA)
+#include <skia/core/SkImage.h>
+#endif
+
+namespace Inspector {
+class BackendDispatcher;
+class FrontendChannel;
+class FrontendRouter;
+class ScreencastFrontendDispatcher;
+}
+
+namespace WebKit {
+class InspectorScreencastAgent;
+}
+
+namespace WTF {
+template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
+template<> struct IsDeprecatedWeakRefSmartPointerException<WebKit::InspectorScreencastAgent> : std::true_type { };
+}
+
+namespace WebKit {
+
+class WebPageProxy;
+
+class InspectorScreencastAgent : public Inspector::InspectorAgentBase, public Inspector::ScreencastBackendDispatcherHandler, public CanMakeWeakPtr<InspectorScreencastAgent> {
+    WTF_MAKE_NONCOPYABLE(InspectorScreencastAgent);
+    WTF_MAKE_TZONE_ALLOCATED(InspectorScreencastAgent);
+public:
+    InspectorScreencastAgent(Inspector::BackendDispatcher& backendDispatcher, Inspector::FrontendRouter& frontendRouter, WebPageProxy& page);
+    ~InspectorScreencastAgent() override;
+
+    void didCreateFrontendAndBackend() override;
+    void willDestroyFrontendAndBackend(Inspector::DisconnectReason) override;
+
+#if USE(SKIA)
+    void didPaint(sk_sp<SkImage>&& surface);
+#endif
+
+    Inspector::Protocol::ErrorStringOr<int /* generation */> startScreencast(int width, int height, int toolbarHeight, int quality) override;
+    Inspector::Protocol::ErrorStringOr<void> screencastFrameAck(int generation) override;
+    Inspector::Protocol::ErrorStringOr<void> stopScreencast() override;
+
+private:
+#if !PLATFORM(WPE)
+    void scheduleFrameEncoding();
+    void encodeFrame();
+#endif
+
+    void kickFramesStarted();
+
+    std::unique_ptr<Inspector::ScreencastFrontendDispatcher> m_frontendDispatcher;
+    Ref<Inspector::ScreencastBackendDispatcher> m_backendDispatcher;
+    WebPageProxy& m_page;
+    Vector<uint8_t> m_lastFrameDigest;
+    bool m_screencast = false;
+    bool m_framesAreGoing = false;
+    double m_screencastWidth = 0;
+    double m_screencastHeight = 0;
+    int m_screencastQuality = 0;
+    int m_screencastToolbarHeight = 0;
+    int m_screencastGeneration = 0;
+    int m_screencastFramesInFlight = 0;
+};
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.cpp b/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.cpp
index 66e1ddd0ad468d7e9d262442ad0efdbcf7989ea1..28c0a0f7b7edaaf7f30c677594365a436344512d 100644
--- a/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.cpp
+++ b/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.cpp
@@ -59,6 +59,11 @@ std::unique_ptr<PageInspectorTargetProxy> PageInspectorTargetProxy::create(Provi
     return target;
 }
 
+std::unique_ptr<PageInspectorTargetProxy> PageInspectorTargetProxy::create(ProvisionalPageProxy& provisionalPage, const String& targetId)
+{
+    return PageInspectorTargetProxy::create(provisionalPage, targetId, Inspector::InspectorTargetType::Page);
+}
+
 PageInspectorTargetProxy::PageInspectorTargetProxy(WebPageProxy& page, const String& targetId, Inspector::InspectorTargetType type)
     : InspectorTargetProxy(targetId, type)
     , m_page(page)
@@ -109,6 +114,31 @@ void PageInspectorTargetProxy::didCommitProvisionalTarget()
     m_provisionalPage = nullptr;
 }
 
+void PageInspectorTargetProxy::willResume()
+{
+    if (m_page->hasRunningProcess())
+        m_page->legacyMainFrameProcess().send(Messages::WebPage::ResumeInspectorIfPausedInNewWindow(), m_page->webPageIDInMainFrameProcess());
+}
+
+void PageInspectorTargetProxy::activate(String& error)
+{
+    if (type() != Inspector::InspectorTargetType::Page)
+        return InspectorTarget::activate(error);
+
+    platformActivate(error);
+}
+
+void PageInspectorTargetProxy::close(String& error, bool runBeforeUnload)
+{
+    if (type() != Inspector::InspectorTargetType::Page)
+        return InspectorTarget::close(error, runBeforeUnload);
+
+    if (runBeforeUnload)
+        m_page->tryClose();
+    else
+        m_page->closePage();
+}
+
 bool PageInspectorTargetProxy::isProvisional() const
 {
     return !!m_provisionalPage;
diff --git a/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.h b/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.h
index 88fe6b2104c5e26cee4a975a552e8a2c78f44129..96631d61f1a043d09769098849c4d91ad2cf6b21 100644
--- a/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.h
+++ b/Source/WebKit/UIProcess/Inspector/PageInspectorTargetProxy.h
@@ -44,6 +44,7 @@ class PageInspectorTargetProxy final : public InspectorTargetProxy {
 public:
     static std::unique_ptr<PageInspectorTargetProxy> create(WebPageProxy&, const String& targetId, Inspector::InspectorTargetType);
     static std::unique_ptr<PageInspectorTargetProxy> create(ProvisionalPageProxy&, const String& targetId, Inspector::InspectorTargetType);
+    static std::unique_ptr<PageInspectorTargetProxy> create(ProvisionalPageProxy&, const String& targetId);
     PageInspectorTargetProxy(WebPageProxy&, const String& targetId, Inspector::InspectorTargetType);
 
     void didCommitProvisionalTarget() override;
@@ -52,8 +53,13 @@ public:
     void connect(Inspector::FrontendChannel::ConnectionType) override;
     void disconnect() override;
     void sendMessageToTargetBackend(const String&) override;
+    void activate(String& error) override;
+    void close(String& error, bool runBeforeUnload) override;
 
 private:
+    void willResume() override;
+    void platformActivate(String& error) const;
+
     WeakRef<WebPageProxy> m_page;
     WeakPtr<ProvisionalPageProxy> m_provisionalPage;
 };
diff --git a/Source/WebKit/UIProcess/Inspector/WasmDebuggerDebuggable.cpp b/Source/WebKit/UIProcess/Inspector/WasmDebuggerDebuggable.cpp
index 232b5dc1c574e4d4231307fee144aff59b519758..651fc7fe63d80cf093192e4eec1576c7621201e1 100644
--- a/Source/WebKit/UIProcess/Inspector/WasmDebuggerDebuggable.cpp
+++ b/Source/WebKit/UIProcess/Inspector/WasmDebuggerDebuggable.cpp
@@ -28,6 +28,7 @@
 
 #if ENABLE(WEBASSEMBLY_DEBUGGER) && ENABLE(REMOTE_INSPECTOR)
 
+#include "WebPageProxy.h"
 #include "WebProcessProxy.h"
 #include "WebProcessProxyMessages.h"
 #include <JavaScriptCore/InspectorFrontendChannel.h>
diff --git a/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.cpp b/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.cpp
index 13da6142d0889583d399b4ee9ead9a6850b700b2..626f87341d5eb3d7192d4c80621e84bf9181940f 100644
--- a/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.cpp
+++ b/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.cpp
@@ -26,19 +26,27 @@
 #include "config.h"
 #include "WebPageInspectorController.h"
 
+#include "APINavigation.h"
+#include "APIPageConfiguration.h"
 #include "APIUIClient.h"
 #include "FrameInspectorTarget.h"
 #include "FrameInspectorTargetProxy.h"
 #include "InspectorBrowserAgent.h"
+#include "InspectorDialogAgent.h"
+#include "InspectorScreencastAgent.h"
 #include "PageInspectorTarget.h"
 #include "PageInspectorTargetProxy.h"
 #include "ProvisionalFrameProxy.h"
 #include "ProvisionalPageProxy.h"
 #include "WebFrameProxy.h"
 #include "WebPageInspectorAgentBase.h"
+#include "WebPageInspectorEmulationAgent.h"
+#include "WebPageInspectorInputAgent.h"
 #include "WebPageProxy.h"
 #include "WebProcessProxy.h"
 #include "WebsiteDataStore.h"
+#include <WebCore/ResourceError.h>
+#include <WebCore/WindowFeatures.h>
 #include <JavaScriptCore/InspectorAgentBase.h>
 #include <JavaScriptCore/InspectorBackendDispatcher.h>
 #include <JavaScriptCore/InspectorBackendDispatchers.h>
@@ -69,6 +77,17 @@ static String getTargetID(const ProvisionalFrameProxy& provisionalFrame)
 
 WTF_MAKE_TZONE_ALLOCATED_IMPL(WebPageInspectorController);
 
+WebPageInspectorControllerObserver* WebPageInspectorController::s_observer = nullptr;
+
+void WebPageInspectorController::setObserver(WebPageInspectorControllerObserver* observer)
+{
+    s_observer = observer;
+}
+
+WebPageInspectorControllerObserver* WebPageInspectorController::observer() {
+    return s_observer;
+}
+
 WebPageInspectorController::WebPageInspectorController(WebPageProxy& inspectedPage)
     : m_frontendRouter(FrontendRouter::create())
     , m_backendDispatcher(BackendDispatcher::create(m_frontendRouter.copyRef()))
@@ -82,16 +101,92 @@ WebPageInspectorController::WebPageInspectorController(WebPageProxy& inspectedPa
 WebPageInspectorController::~WebPageInspectorController() = default;
 
 void WebPageInspectorController::init()
+{
+    auto targetAgent = makeUniqueRef<InspectorTargetAgent>(m_frontendRouter.get(), m_backendDispatcher.get());
+    m_targetAgent = targetAgent.ptr();
+    m_agents.append(WTF::move(targetAgent));
+    auto emulationAgent = makeUniqueRef<WebPageInspectorEmulationAgent>(m_backendDispatcher.get(), m_inspectedPage);
+    m_emulationAgent = emulationAgent.ptr();
+    m_agents.append(WTF::move(emulationAgent));
+    auto inputAgent = makeUniqueRef<WebPageInspectorInputAgent>(m_backendDispatcher.get(), m_inspectedPage);
+    m_inputAgent = inputAgent.ptr();
+    m_agents.append(WTF::move(inputAgent));
+    m_agents.append(makeUniqueRef<InspectorDialogAgent>(m_backendDispatcher.get(), m_frontendRouter.get(), m_inspectedPage));
+    auto screencastAgent = makeUniqueRef<InspectorScreencastAgent>(m_backendDispatcher.get(), m_frontendRouter.get(), m_inspectedPage);
+    m_screecastAgent = screencastAgent.ptr();
+    m_agents.append(WTF::move(screencastAgent));
+    if (s_observer)
+        s_observer->didCreateInspectorController(m_inspectedPage);
+}
+
+void WebPageInspectorController::didInitializeWebPage()
 {
     String pageTargetId = PageInspectorTarget::toTargetID(m_inspectedPage->webPageIDInMainFrameProcess());
+    // Create target only after attaching to a Web Process first time. Before that
+    // we cannot event establish frontend connection.
+    if (m_targets.contains(pageTargetId))
+        return;
     addTarget(PageInspectorTargetProxy::create(protect(m_inspectedPage), pageTargetId, Inspector::InspectorTargetType::Page));
+    if (m_inspectedPage->mainFrame())
+        didCreateFrame(*m_inspectedPage->mainFrame());
 }
 
 void WebPageInspectorController::pageClosed()
 {
+    String pageTargetId = PageInspectorTarget::toTargetID(m_inspectedPage->webPageIDInMainFrameProcess());
+    removeTarget(pageTargetId);
+
+
     disconnectAllFrontends();
 
     m_agents.discardValues();
+
+    if (s_observer)
+        s_observer->willDestroyInspectorController(m_inspectedPage);
+}
+
+bool WebPageInspectorController::pageCrashed(ProcessTerminationReason reason)
+{
+    if (reason != ProcessTerminationReason::Crash)
+        return false;
+    String targetId = PageInspectorTarget::toTargetID(m_inspectedPage->webPageIDInMainFrameProcess());
+    auto it = m_targets.find(targetId);
+    if (it == m_targets.end())
+        return false;
+    m_targetAgent->targetCrashed(*it->value);
+    m_targets.remove(it);
+
+    return m_targetAgent->isConnected();
+}
+
+void WebPageInspectorController::willCreateNewPage(const WebCore::WindowFeatures& features, const URL& url)
+{
+    if (s_observer)
+        s_observer->willCreateNewPage(m_inspectedPage, features, url);
+}
+
+void WebPageInspectorController::didShowPage()
+{
+    if (m_frontendRouter->hasFrontends())
+        m_emulationAgent->didShowPage();
+}
+
+void WebPageInspectorController::didProcessAllPendingKeyboardEvents()
+{
+    if (m_frontendRouter->hasFrontends())
+        m_inputAgent->didProcessAllPendingKeyboardEvents();
+}
+
+void WebPageInspectorController::didProcessAllPendingMouseEvents()
+{
+    if (m_frontendRouter->hasFrontends())
+        m_inputAgent->didProcessAllPendingMouseEvents();
+}
+
+void WebPageInspectorController::didProcessAllPendingWheelEvents()
+{
+    if (m_frontendRouter->hasFrontends())
+        m_inputAgent->didProcessAllPendingWheelEvents();
 }
 
 bool WebPageInspectorController::hasLocalFrontend() const
@@ -105,6 +200,14 @@ void WebPageInspectorController::connectFrontend(Inspector::FrontendChannel& fro
 
     bool connectingFirstFrontend = !m_frontendRouter->hasFrontends();
 
+    // HACK: forcefully disconnect remote connections to show local inspector starting with initial
+    // agents' state.
+    if (frontendChannel.connectionType() == Inspector::FrontendChannel::ConnectionType::Local &&
+        !connectingFirstFrontend && !m_frontendRouter->hasLocalFrontend()) {
+        disconnectAllFrontends();
+        connectingFirstFrontend = true;
+    }
+
     m_frontendRouter->connectFrontend(frontendChannel);
 
     if (connectingFirstFrontend)
@@ -124,8 +227,10 @@ void WebPageInspectorController::disconnectFrontend(FrontendChannel& frontendCha
     m_frontendRouter->disconnectFrontend(frontendChannel);
 
     bool disconnectingLastFrontend = !m_frontendRouter->hasFrontends();
-    if (disconnectingLastFrontend)
+    if (disconnectingLastFrontend) {
         m_agents.willDestroyFrontendAndBackend(DisconnectReason::InspectorDestroyed);
+        m_pendingNavigations.clear();
+    }
 
     Ref inspectedPage = m_inspectedPage.get();
     inspectedPage->didChangeInspectorFrontendCount(m_frontendRouter->frontendCount());
@@ -149,6 +254,8 @@ void WebPageInspectorController::disconnectAllFrontends()
     // Disconnect any remaining remote frontends.
     m_frontendRouter->disconnectAllFrontends();
 
+    m_pendingNavigations.clear();
+
     Ref inspectedPage = m_inspectedPage.get();
     inspectedPage->didChangeInspectorFrontendCount(m_frontendRouter->frontendCount());
 
@@ -177,6 +284,66 @@ void WebPageInspectorController::setIndicating(bool indicating)
 }
 #endif
 
+#if USE(SKIA)
+void WebPageInspectorController::didPaint(sk_sp<SkImage>&& surface)
+{
+    if (!m_frontendRouter->hasFrontends())
+        return;
+
+    m_screecastAgent->didPaint(WTF::move(surface));
+}
+#endif
+
+
+void WebPageInspectorController::navigate(WebCore::ResourceRequest&& request, WebFrameProxy* frame, NavigationHandler&& completionHandler)
+{
+    auto navigation = m_inspectedPage->loadRequestForInspector(WTF::move(request), frame);
+    if (!navigation) {
+        completionHandler("Failed to navigate"_s, { });
+        return;
+    }
+
+    m_pendingNavigations.set(navigation->navigationID(), WTF::move(completionHandler));
+}
+
+void WebPageInspectorController::didReceivePolicyDecision(WebCore::PolicyAction action, std::optional<WebCore::NavigationIdentifier> navigationID)
+{
+    if (!m_frontendRouter->hasFrontends())
+        return;
+
+    if (!navigationID)
+        return;
+
+    auto completionHandler = m_pendingNavigations.take(*navigationID);
+    if (!completionHandler)
+        return;
+
+    if (action == WebCore::PolicyAction::Ignore)
+        completionHandler("Navigation cancelled"_s, { });
+    else
+        completionHandler(String(), *navigationID);
+}
+
+void WebPageInspectorController::didDestroyNavigation(WebCore::NavigationIdentifier navigationID)
+{
+    if (!m_frontendRouter->hasFrontends())
+        return;
+
+    auto completionHandler = m_pendingNavigations.take(navigationID);
+    if (!completionHandler)
+        return;
+
+    // Inspector initiated navigation is destroyed before policy check only when it
+    // becomes a fragment navigation (which always reuses current navigation).
+    completionHandler(String(), { });
+}
+
+void WebPageInspectorController::didFailProvisionalLoadForFrame(WebCore::NavigationIdentifier navigationID, const WebCore::ResourceError& error)
+{
+    if (s_observer)
+        s_observer->didFailProvisionalLoad(m_inspectedPage, navigationID, error.localizedDescription());
+}
+
 void WebPageInspectorController::sendMessageToInspectorFrontend(const String& targetId, const String& message)
 {
     if (!m_targets.contains(targetId)) {
@@ -191,6 +358,52 @@ void WebPageInspectorController::sendMessageToInspectorFrontend(const String& ta
     protect(m_targetAgent)->sendMessageFromTargetToFrontend(targetId, message);
 }
 
+void WebPageInspectorController::setPauseOnStart(bool shouldPause)
+{
+    ASSERT(m_frontendRouter->hasFrontends());
+    m_targetAgent->setPauseOnStart(shouldPause);
+}
+
+bool WebPageInspectorController::shouldPauseLoadRequest() const
+{
+    if (!m_frontendRouter->hasFrontends())
+        return false;
+
+    if (!m_inspectedPage->isPageOpenedByDOMShowingInitialEmptyDocument())
+        return false;
+
+    auto* target = m_targets.get(PageInspectorTarget::toTargetID(m_inspectedPage->webPageIDInMainFrameProcess()));
+    // The method is expeted to be called only when the WebPage has already been
+    // initilized, so the target must exist.
+    ASSERT(target);
+    return target->isPaused();
+}
+
+bool WebPageInspectorController::shouldPauseInInspectorWhenShown() const
+{
+    if (!m_frontendRouter->hasFrontends())
+        return false;
+
+    // Only pause if the page was opened by window.open() or new tab navigation.
+    // We cannot use isPageOpenedByDOMShowingInitialEmptyDocument() here because
+    // this method maybe called from WebPageProxy::initializeWebPage and setOpenedByDOM
+    // is called after the page is initialized.
+    if (!m_inspectedPage->configuration().windowFeatures())
+        return false;
+
+    // The method is called from WebPageProxy::initializePage and the
+    // target is not created yet (it is created after the new page is
+    //  initialized and attached to the process).
+    return m_targetAgent->shouldPauseOnStart();
+}
+
+void WebPageInspectorController::setContinueLoadingCallback(WTF::Function<void()>&& callback)
+{
+    auto* target = m_targets.get(PageInspectorTarget::toTargetID(m_inspectedPage->webPageIDInMainFrameProcess()));
+    ASSERT(target);
+    target->setResumeCallback(WTF::move(callback));
+}
+
 bool WebPageInspectorController::shouldPauseLoading(const ProvisionalPageProxy& provisionalPage) const
 {
     if (!m_frontendRouter->hasFrontends())
@@ -210,7 +423,7 @@ void WebPageInspectorController::setContinueLoadingCallback(const ProvisionalPag
 
 void WebPageInspectorController::didCreateProvisionalPage(ProvisionalPageProxy& provisionalPage, WebCore::FrameIdentifier mainFrameID, WebProcessProxy& mainFrameProcess)
 {
-    addTarget(PageInspectorTargetProxy::create(provisionalPage, getTargetID(provisionalPage), Inspector::InspectorTargetType::Page));
+    addTarget(PageInspectorTargetProxy::create(provisionalPage, getTargetID(provisionalPage)));
 
     if (shouldManageFrameTargets()) {
         constexpr bool isProvisional = true;
diff --git a/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.h b/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.h
index f670f9007a9386bf9933e59c32463f697dbb6597..17fa5c0f2860c9423de3e167616d46fa5d857125 100644
--- a/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.h
+++ b/Source/WebKit/UIProcess/Inspector/WebPageInspectorController.h
@@ -28,9 +28,11 @@
 #include "InspectorTargetProxy.h"
 #include "ProvisionalPageProxy.h"
 #include "UIProcess/WebFrameProxy.h"
+#include "ProcessTerminationReason.h"
 #include <JavaScriptCore/InspectorAgentRegistry.h>
 #include <JavaScriptCore/InspectorTargetAgent.h>
 #include <WebCore/FrameIdentifier.h>
+#include <WebCore/NavigationIdentifier.h>
 #include <WebCore/PageIdentifier.h>
 #include <WebCore/ProcessIdentifier.h>
 #include <wtf/CheckedRef.h>
@@ -38,11 +40,29 @@
 #include <wtf/Noncopyable.h>
 #include <wtf/TZoneMalloc.h>
 #include <wtf/text/WTFString.h>
+#include <wtf/URL.h>
+
+#if USE(SKIA)
+#include <skia/core/SkData.h>
+#include <skia/core/SkImage.h>
+#endif
 
 namespace Inspector {
 class BackendDispatcher;
 class FrontendChannel;
 class FrontendRouter;
+class InspectorTarget;
+}
+
+namespace WebCore {
+class ResourceError;
+class ResourceRequest;
+enum class PolicyAction : uint8_t;
+struct WindowFeatures;
+}
+
+namespace PAL {
+class SessionID;
 }
 
 namespace WebKit {
@@ -51,6 +71,22 @@ class InspectorBrowserAgent;
 class ProvisionalPageProxy;
 struct WebPageAgentContext;
 
+class InspectorScreencastAgent;
+class WebFrameProxy;
+class WebPageInspectorEmulationAgent;
+class WebPageInspectorInputAgent;
+
+class WebPageInspectorControllerObserver {
+public:
+    virtual void didCreateInspectorController(WebPageProxy&) = 0;
+    virtual void willDestroyInspectorController(WebPageProxy&) = 0;
+    virtual void didFailProvisionalLoad(WebPageProxy&, WebCore::NavigationIdentifier, const String& error) = 0;
+    virtual void willCreateNewPage(WebPageProxy&, const WebCore::WindowFeatures&, const URL&) = 0;
+
+protected:
+    virtual ~WebPageInspectorControllerObserver() = default;
+};
+
 class WebPageInspectorController {
     WTF_MAKE_TZONE_ALLOCATED(WebPageInspectorController);
     WTF_MAKE_NONCOPYABLE(WebPageInspectorController);
@@ -59,7 +95,21 @@ public:
     ~WebPageInspectorController();
 
     void init();
+    void didInitializeWebPage();
+
+    static void setObserver(WebPageInspectorControllerObserver*);
+    static WebPageInspectorControllerObserver* observer();
+
     void pageClosed();
+    bool pageCrashed(ProcessTerminationReason);
+
+    void willCreateNewPage(const WebCore::WindowFeatures&, const URL&);
+
+    void didShowPage();
+
+    void didProcessAllPendingKeyboardEvents();
+    void didProcessAllPendingMouseEvents();
+    void didProcessAllPendingWheelEvents();
 
     bool hasLocalFrontend() const;
 
@@ -72,9 +122,25 @@ public:
 #if ENABLE(REMOTE_INSPECTOR)
     void setIndicating(bool);
 #endif
+#if USE(SKIA)
+    void didPaint(sk_sp<SkImage>&&);
+#endif
+    using NavigationHandler = Function<void(const String&, Markable<WebCore::NavigationIdentifier>)>;
+    void navigate(WebCore::ResourceRequest&&, WebFrameProxy*, NavigationHandler&&);
+    void didReceivePolicyDecision(WebCore::PolicyAction action, std::optional<WebCore::NavigationIdentifier> navigationID);
+
+    void didDestroyNavigation(WebCore::NavigationIdentifier navigationID);
+
+    void didFailProvisionalLoadForFrame(WebCore::NavigationIdentifier navigationID, const WebCore::ResourceError& error);
 
     void sendMessageToInspectorFrontend(const String& targetId, const String& message);
 
+    void setPauseOnStart(bool);
+
+    bool shouldPauseLoadRequest() const;
+    bool shouldPauseInInspectorWhenShown() const;
+    void setContinueLoadingCallback(WTF::Function<void()>&&);
+
     bool shouldPauseLoading(const ProvisionalPageProxy&) const;
     void setContinueLoadingCallback(const ProvisionalPageProxy&, WTF::Function<void()>&&);
 
@@ -111,9 +177,16 @@ private:
     CheckedPtr<Inspector::InspectorTargetAgent> m_targetAgent;
     HashMap<String, std::unique_ptr<InspectorTargetProxy>> m_targets;
 
+    WebPageInspectorEmulationAgent* m_emulationAgent { nullptr };
+    WebPageInspectorInputAgent* m_inputAgent { nullptr };
+    InspectorScreencastAgent* m_screecastAgent { nullptr };
+
     CheckedPtr<InspectorBrowserAgent> m_enabledBrowserAgent;
 
     bool m_didCreateLazyAgents { false };
+    UncheckedKeyHashMap<WebCore::NavigationIdentifier, NavigationHandler> m_pendingNavigations;
+
+    static WebPageInspectorControllerObserver* s_observer;
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/UIProcess/InspectorDialogAgent.cpp b/Source/WebKit/UIProcess/InspectorDialogAgent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..53bf0625a4e6af2f4387b9a516604d5e6219cfef
--- /dev/null
+++ b/Source/WebKit/UIProcess/InspectorDialogAgent.cpp
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorDialogAgent.h"
+
+#include "APINavigation.h"
+#include "APIUIClient.h"
+#include "WebPageProxy.h"
+#include <JavaScriptCore/InspectorFrontendRouter.h>
+
+
+namespace WebKit {
+
+using namespace Inspector;
+
+WTF_MAKE_TZONE_ALLOCATED_IMPL(InspectorDialogAgent);
+
+InspectorDialogAgent::InspectorDialogAgent(Inspector::BackendDispatcher& backendDispatcher, Inspector::FrontendRouter& frontendRouter, WebPageProxy& page)
+    : InspectorAgentBase("Dialog"_s)
+    , m_frontendDispatcher(makeUnique<DialogFrontendDispatcher>(frontendRouter))
+    , m_backendDispatcher(DialogBackendDispatcher::create(backendDispatcher, this))
+    , m_page(page)
+{
+}
+
+InspectorDialogAgent::~InspectorDialogAgent()
+{
+    disable();
+}
+
+void InspectorDialogAgent::didCreateFrontendAndBackend()
+{
+}
+
+void InspectorDialogAgent::willDestroyFrontendAndBackend(Inspector::DisconnectReason)
+{
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorDialogAgent::enable()
+{
+    if (m_page.inspectorDialogAgent())
+        return makeUnexpected("Dialog domain is already enabled."_s);
+
+    m_page.setInspectorDialogAgent(this);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorDialogAgent::disable()
+{
+    if (m_page.inspectorDialogAgent() != this)
+        return { };
+
+    m_page.setInspectorDialogAgent(nullptr);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorDialogAgent::handleJavaScriptDialog(bool accept, const String& value)
+{
+    m_page.uiClient().handleJavaScriptDialog(m_page, accept, value);
+    return { };
+}
+
+void InspectorDialogAgent::javascriptDialogOpening(const String& type, const String& message, const String& defaultValue) {
+    m_frontendDispatcher->javascriptDialogOpening(type, message, defaultValue);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/InspectorDialogAgent.h b/Source/WebKit/UIProcess/InspectorDialogAgent.h
new file mode 100644
index 0000000000000000000000000000000000000000..26775d9cfe30d220b14c1b2355a9baf9e6eca815
--- /dev/null
+++ b/Source/WebKit/UIProcess/InspectorDialogAgent.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "WebEvent.h"
+
+#include <JavaScriptCore/InspectorAgentBase.h>
+#include <JavaScriptCore/InspectorBackendDispatchers.h>
+#include <JavaScriptCore/InspectorFrontendDispatchers.h>
+
+#include <wtf/Forward.h>
+#include <wtf/Noncopyable.h>
+
+namespace Inspector {
+class FrontendChannel;
+class FrontendRouter;
+}
+
+namespace WebKit {
+
+class NativeWebKeyboardEvent;
+class WebPageProxy;
+
+class InspectorDialogAgent : public Inspector::InspectorAgentBase, public Inspector::DialogBackendDispatcherHandler {
+    WTF_MAKE_NONCOPYABLE(InspectorDialogAgent);
+    WTF_MAKE_TZONE_ALLOCATED(InspectorDialogAgent);
+public:
+    InspectorDialogAgent(Inspector::BackendDispatcher& backendDispatcher, Inspector::FrontendRouter& frontendRouter, WebPageProxy& page);
+    ~InspectorDialogAgent() override;
+
+    void didCreateFrontendAndBackend() override;
+    void willDestroyFrontendAndBackend(Inspector::DisconnectReason) override;
+
+    Inspector::Protocol::ErrorStringOr<void> enable() override;
+    Inspector::Protocol::ErrorStringOr<void> disable() override;
+    Inspector::Protocol::ErrorStringOr<void> handleJavaScriptDialog(bool accept, const String& promptText) override;
+
+    void javascriptDialogOpening(const String& type, const String& message, const String& defaultValue = String());
+
+private:
+    void platformHandleJavaScriptDialog(bool accept, const String* promptText);
+    std::unique_ptr<Inspector::DialogFrontendDispatcher> m_frontendDispatcher;
+    Ref<Inspector::DialogBackendDispatcher> m_backendDispatcher;
+    WebPageProxy& m_page;
+};
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/InspectorPlaywrightAgent.cpp b/Source/WebKit/UIProcess/InspectorPlaywrightAgent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..635da5eda9d9bbe21c5fa35936656b02c4b3ab46
--- /dev/null
+++ b/Source/WebKit/UIProcess/InspectorPlaywrightAgent.cpp
@@ -0,0 +1,1033 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorPlaywrightAgent.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "APIGeolocationProvider.h"
+#include "APIHTTPCookieStore.h"
+#include "APIPageConfiguration.h"
+#include "FrameInfoData.h"
+#include "InspectorPlaywrightAgentClient.h"
+#include "InspectorTargetProxy.h"
+#include "NetworkProcessMessages.h"
+#include "NetworkProcessProxy.h"
+#include "PageClient.h"
+#include "PageInspectorTarget.h"
+#include "PlaywrightFullScreenManagerProxyClient.h"
+#include "SandboxExtension.h"
+#include "StorageNamespaceIdentifier.h"
+#include "WebAutomationSession.h"
+#include "WebGeolocationManagerProxy.h"
+#include "WebGeolocationPosition.h"
+#include "WebFrameProxy.h"
+#include "WebInspectorUtilities.h"
+#include "WebPageGroup.h"
+#include "WebPageInspectorController.h"
+#include "WebPageMessages.h"
+#include "WebPageProxy.h"
+#include "WebPreferences.h"
+#include "WebProcessPool.h"
+#include "WebProcessProxy.h"
+#include "WebsiteDataRecord.h"
+#include <WebCore/FrameIdentifier.h>
+#include <WebCore/GeolocationPositionData.h>
+#include <WebCore/InspectorPageAgent.h>
+#include <WebCore/ProcessIdentifier.h>
+#include <WebCore/ResourceRequest.h>
+#include <WebCore/SecurityOriginData.h>
+#include <WebCore/StorageBlockingPolicy.h>
+#include <WebCore/WindowFeatures.h>
+#include <JavaScriptCore/InspectorBackendDispatcher.h>
+#include <JavaScriptCore/InspectorFrontendChannel.h>
+#include <JavaScriptCore/InspectorFrontendRouter.h>
+#include <pal/SessionID.h>
+#include <stdlib.h>
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+#include <wtf/HexNumber.h>
+#include <wtf/URL.h>
+#include <wtf/text/MakeString.h>
+
+using namespace Inspector;
+
+namespace WebKit {
+
+class InspectorPlaywrightAgent::PageProxyChannel : public FrontendChannel {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgent);
+public:
+    PageProxyChannel(FrontendChannel& frontendChannel, String browserContextID, String pageProxyID, WebPageProxy& page)
+        : m_browserContextID(browserContextID)
+        , m_pageProxyID(pageProxyID)
+        , m_frontendChannel(frontendChannel)
+        , m_page(page)
+    {
+    }
+
+    ~PageProxyChannel() override = default;
+
+    void dispatchMessageFromFrontend(const String& message)
+    {
+        m_page.inspectorController().dispatchMessageFromFrontend(message);
+    }
+
+    WebPageProxy& page() { return m_page; }
+
+    void disconnect()
+    {
+        m_page.inspectorController().disconnectFrontend(*this);
+    }
+
+private:
+    ConnectionType connectionType() const override { return m_frontendChannel.connectionType(); }
+    void sendMessageToFrontend(const String& message) override
+    {
+        m_frontendChannel.sendMessageToFrontend(addTabIdToMessage(message));
+    }
+
+    String addTabIdToMessage(const String& message) {
+        RefPtr<JSON::Value> parsedMessage = JSON::Value::parseJSON(message);
+        if (!parsedMessage)
+            return message;
+
+        RefPtr<JSON::Object> messageObject = parsedMessage->asObject();
+        if (!messageObject)
+            return message;
+
+        messageObject->setString("browserContextId"_s, m_browserContextID);
+        messageObject->setString("pageProxyId"_s, m_pageProxyID);
+        return messageObject->toJSONString();
+    }
+
+    String m_browserContextID;
+    String m_pageProxyID;
+    FrontendChannel& m_frontendChannel;
+    WebPageProxy& m_page;
+};
+
+class OverridenGeolocationProvider final : public API::GeolocationProvider, public CanMakeWeakPtr<OverridenGeolocationProvider> {
+     WTF_MAKE_NONCOPYABLE(OverridenGeolocationProvider);
+public:
+    OverridenGeolocationProvider()
+        : m_position(WebGeolocationPosition::create(WebCore::GeolocationPositionData()))
+    {
+    }
+
+    void setPosition(const Ref<WebGeolocationPosition>& position) {
+        m_position = position;
+    }
+
+private:
+    void startUpdating(WebGeolocationManagerProxy& proxy) override
+    {
+        proxy.providerDidChangePosition(&m_position.get());
+    }
+
+    void stopUpdating(WebGeolocationManagerProxy&) override
+    {
+    }
+
+    void setEnableHighAccuracy(WebGeolocationManagerProxy&, bool enabled) override
+    {
+    }
+
+    Ref<WebGeolocationPosition> m_position;
+};
+
+namespace {
+
+void setGeolocationProvider(BrowserContext* browserContext) {
+    auto provider = makeUnique<OverridenGeolocationProvider>();
+    browserContext->geolocationProvider = *provider;
+    auto* geoManager = browserContext->processPool->supplement<WebGeolocationManagerProxy>();
+    geoManager->setProvider(WTF::move(provider));
+}
+
+String toBrowserContextIDProtocolString(const PAL::SessionID& sessionID)
+{
+    StringBuilder builder;
+    builder.append(hex(sessionID.toUInt64(), 16));
+    return builder.toString();
+}
+
+String toPageProxyIDProtocolString(const WebPageProxy& page)
+{
+    return makeString(page.identifier().toUInt64());
+}
+
+
+static Ref<JSON::ArrayOf<String>> getEnabledWindowFeatures(const WebCore::WindowFeatures& features) {
+  auto result = JSON::ArrayOf<String>::create();
+  if (features.x)
+    result->addItem(makeString("left="_s, String::number(*features.x)));
+  if (features.y)
+    result->addItem(makeString("top="_s, String::number(*features.y)));
+  if (features.width)
+    result->addItem(makeString("width="_s, String::number(*features.width)));
+  if (features.height)
+    result->addItem(makeString("height="_s, String::number(*features.height)));
+  if (features.menuBarVisible)
+    result->addItem("menubar"_s);
+  if (features.toolBarVisible)
+    result->addItem("toolbar"_s);
+  if (features.statusBarVisible)
+    result->addItem("status"_s);
+  if (features.locationBarVisible)
+    result->addItem("location"_s);
+  if (features.scrollbarsVisible)
+    result->addItem("scrollbars"_s);
+  if (features.resizable)
+    result->addItem("resizable"_s);
+  if (features.fullscreen)
+    result->addItem("fullscreen"_s);
+  if (features.dialog)
+    result->addItem("dialog"_s);
+  if (features.noopener)
+    result->addItem("noopener"_s);
+  if (features.noreferrer)
+    result->addItem("noreferrer"_s);
+  for (const auto& additionalFeature : features.additionalFeatures)
+    result->addItem(additionalFeature);
+  return result;
+}
+
+Inspector::Protocol::Playwright::CookieSameSitePolicy cookieSameSitePolicy(WebCore::Cookie::SameSitePolicy policy)
+{
+    switch (policy) {
+    case WebCore::Cookie::SameSitePolicy::None:
+        return Inspector::Protocol::Playwright::CookieSameSitePolicy::None;
+    case WebCore::Cookie::SameSitePolicy::Lax:
+        return Inspector::Protocol::Playwright::CookieSameSitePolicy::Lax;
+    case WebCore::Cookie::SameSitePolicy::Strict:
+        return Inspector::Protocol::Playwright::CookieSameSitePolicy::Strict;
+    }
+    ASSERT_NOT_REACHED();
+    return Inspector::Protocol::Playwright::CookieSameSitePolicy::None;
+}
+
+Ref<Inspector::Protocol::Playwright::Cookie> buildObjectForCookie(const WebCore::Cookie& cookie)
+{
+    return Inspector::Protocol::Playwright::Cookie::create()
+        .setName(cookie.name)
+        .setValue(cookie.value)
+        .setDomain(cookie.domain)
+        .setPath(cookie.path)
+        .setExpires(cookie.expires.value_or(-1))
+        .setHttpOnly(cookie.httpOnly)
+        .setSecure(cookie.secure)
+        .setSession(cookie.session)
+        .setSameSite(cookieSameSitePolicy(cookie.sameSite))
+        .release();
+}
+
+void adjustInspectedPagePreferences(WebPreferences& preferences, std::optional<bool> enableStoragePartitioning)
+{
+    // Set this to true as otherwise updating any preferences will override its
+    // value in the Web Process to false (and InspectorController sets it locally
+    // to true when frontend is connected).
+    preferences.setDeveloperExtrasEnabled(true);
+
+    // Navigation to cached pages doesn't fire some of the events (e.g. execution context created)
+    // that inspector depends on. So we disable the cache when front-end connects.
+    preferences.setUsesBackForwardCache(false);
+
+    // Enable popup debugging.
+    // TODO: allow to set preferences over the inspector protocol or find a better place for this.
+    preferences.setJavaScriptCanOpenWindowsAutomatically(true);
+
+    // Enable media stream.
+    if (!preferences.mediaDevicesEnabled()) {
+        preferences.setMediaDevicesEnabled(true);
+        preferences.setPeerConnectionEnabled(true);
+    }
+
+    if (!enableStoragePartitioning || !*enableStoragePartitioning) {
+        // Disable local storage partitioning. See https://github.com/microsoft/playwright/issues/32230
+        preferences.setStorageBlockingPolicy(static_cast<uint32_t>(WebCore::StorageBlockingPolicy::AllowAll));
+    }
+}
+
+}  // namespace
+
+BrowserContext::BrowserContext() = default;
+
+BrowserContext::~BrowserContext() = default;
+
+class InspectorPlaywrightAgent::BrowserContextDeletion {
+    WTF_MAKE_NONCOPYABLE(BrowserContextDeletion);
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgent::BrowserContextDeletion);
+public:
+    BrowserContextDeletion(std::unique_ptr<BrowserContext>&& context, size_t numberOfPages, Ref<DeleteContextCallback>&& callback)
+        : m_browserContext(WTF::move(context))
+        , m_numberOfPages(numberOfPages)
+        , m_callback(WTF::move(callback)) { }
+
+    void didDestroyPage(const WebPageProxy& page)
+    {
+        ASSERT(m_browserContext->dataStore->sessionID() == page.sessionID());
+        // Check if new pages have been created during the context destruction and
+        // close all of them if necessary.
+        if (m_numberOfPages == 1) {
+            auto pages = m_browserContext->pages;
+            size_t numberOfPages = pages.size();
+            if (numberOfPages > 1) {
+                m_numberOfPages = numberOfPages;
+                for (auto* existingPage : pages) {
+                    if (existingPage != &page)
+                        existingPage->closePage();
+                }
+            }
+        }
+        --m_numberOfPages;
+        if (m_numberOfPages)
+            return;
+        m_callback->sendSuccess();
+    }
+
+    bool isFinished() const { return !m_numberOfPages; }
+
+    BrowserContext* context() const { return m_browserContext.get(); }
+
+private:
+    std::unique_ptr<BrowserContext> m_browserContext;
+    size_t m_numberOfPages;
+    Ref<DeleteContextCallback> m_callback;
+};
+
+
+InspectorPlaywrightAgent::InspectorPlaywrightAgent(std::unique_ptr<InspectorPlaywrightAgentClient> client)
+    : m_frontendChannel(nullptr)
+    , m_frontendRouter(FrontendRouter::create())
+    , m_backendDispatcher(BackendDispatcher::create(m_frontendRouter.copyRef()))
+    , m_client(std::move(client))
+    , m_frontendDispatcher(makeUnique<PlaywrightFrontendDispatcher>(m_frontendRouter))
+    , m_playwrightDispatcher(PlaywrightBackendDispatcher::create(m_backendDispatcher.get(), this))
+{
+}
+
+InspectorPlaywrightAgent::~InspectorPlaywrightAgent()
+{
+    if (m_frontendChannel)
+        disconnectFrontend();
+}
+
+void InspectorPlaywrightAgent::connectFrontend(FrontendChannel& frontendChannel)
+{
+    ASSERT(!m_frontendChannel);
+    m_frontendChannel = &frontendChannel;
+    WebPageInspectorController::setObserver(this);
+
+    m_frontendRouter->connectFrontend(frontendChannel);
+}
+
+void InspectorPlaywrightAgent::disconnectFrontend()
+{
+    if (!m_frontendChannel)
+        return;
+
+    disable();
+
+    m_frontendRouter->disconnectFrontend(*m_frontendChannel);
+    ASSERT(!m_frontendRouter->hasFrontends());
+
+    WebPageInspectorController::setObserver(nullptr);
+    m_frontendChannel = nullptr;
+
+    closeImpl([](String error){});
+}
+
+void InspectorPlaywrightAgent::dispatchMessageFromFrontend(const String& message)
+{
+    m_backendDispatcher->dispatch(message, [&](const RefPtr<JSON::Object>& messageObject) {
+        RefPtr<JSON::Value> idValue;
+        if (!messageObject->getValue("id"_s, idValue))
+            return BackendDispatcher::InterceptionResult::Continue;
+        RefPtr<JSON::Value> pageProxyIDValue;
+        if (!messageObject->getValue("pageProxyId"_s, pageProxyIDValue))
+            return BackendDispatcher::InterceptionResult::Continue;
+
+        String pageProxyID;
+        if (!pageProxyIDValue->asString(pageProxyID)) {
+            m_backendDispatcher->reportProtocolError(BackendDispatcher::InvalidRequest, "The type of 'pageProxyId' must be string"_s);
+            m_backendDispatcher->sendPendingErrors();
+            return BackendDispatcher::InterceptionResult::Intercepted;
+        }
+
+        if (auto pageProxyChannel = m_pageProxyChannels.get(pageProxyID)) {
+            pageProxyChannel->dispatchMessageFromFrontend(message);
+            return BackendDispatcher::InterceptionResult::Intercepted;
+        }
+
+        std::optional<int> requestId = idValue->asInteger();
+        if (!requestId) {
+            m_backendDispatcher->reportProtocolError(BackendDispatcher::InvalidRequest, "The type of 'id' must be number"_s);
+            m_backendDispatcher->sendPendingErrors();
+            return BackendDispatcher::InterceptionResult::Intercepted;
+        }
+
+        m_backendDispatcher->reportProtocolError(*requestId, BackendDispatcher::InvalidParams, "Cannot find page proxy with provided 'pageProxyId'"_s);
+        m_backendDispatcher->sendPendingErrors();
+        return BackendDispatcher::InterceptionResult::Intercepted;
+    });
+}
+
+void InspectorPlaywrightAgent::didCreateInspectorController(WebPageProxy& page)
+{
+    if (!m_isEnabled)
+        return;
+
+    if (isInspectorProcessPool(page.legacyMainFrameProcess().processPool()))
+        return;
+
+    ASSERT(m_frontendChannel);
+
+    String browserContextID = toBrowserContextIDProtocolString(page.sessionID());
+    String pageProxyID = toPageProxyIDProtocolString(page);
+    auto* opener = page.configuration().openerPageForInspector();
+    String openerId;
+    if (opener)
+        openerId = toPageProxyIDProtocolString(*opener);
+
+    BrowserContext* browserContext = getExistingBrowserContext(browserContextID);
+    browserContext->pages.add(&page);
+    m_frontendDispatcher->pageProxyCreated(browserContextID, pageProxyID, openerId);
+
+    // Auto-connect to all new pages.
+    auto pageProxyChannel = makeUnique<PageProxyChannel>(*m_frontendChannel, browserContextID, pageProxyID, page);
+    adjustInspectedPagePreferences(page.preferences(), browserContext->enableStoragePartitioning);
+    page.inspectorController().connectFrontend(*pageProxyChannel);
+    // Always pause new targets if controlled remotely.
+    page.inspectorController().setPauseOnStart(true);
+    m_pageProxyChannels.set(pageProxyID, WTF::move(pageProxyChannel));
+    page.setFullScreenManagerClientOverride(makeUnique<PlaywrightFullScreenManagerProxyClient>(page));
+}
+
+void InspectorPlaywrightAgent::willDestroyInspectorController(WebPageProxy& page)
+{
+    if (!m_isEnabled)
+        return;
+
+    if (isInspectorProcessPool(page.legacyMainFrameProcess().processPool()))
+        return;
+
+    String browserContextID = toBrowserContextIDProtocolString(page.sessionID());
+    BrowserContext* browserContext = getExistingBrowserContext(browserContextID);
+    browserContext->pages.remove(&page);
+    m_frontendDispatcher->pageProxyDestroyed(toPageProxyIDProtocolString(page));
+
+    auto it = m_browserContextDeletions.find(browserContextID);
+    if (it != m_browserContextDeletions.end()) {
+        it->value->didDestroyPage(page);
+        if (it->value->isFinished())
+            m_browserContextDeletions.remove(it);
+    }
+
+    String pageProxyID = toPageProxyIDProtocolString(page);
+    auto channelIt = m_pageProxyChannels.find(pageProxyID);
+    ASSERT(channelIt != m_pageProxyChannels.end());
+    channelIt->value->disconnect();
+    m_pageProxyChannels.remove(channelIt);
+}
+
+void InspectorPlaywrightAgent::didFailProvisionalLoad(WebPageProxy& page, WebCore::NavigationIdentifier navigationID, const String& error)
+{
+    if (!m_isEnabled)
+        return;
+
+    m_frontendDispatcher->provisionalLoadFailed(
+        toPageProxyIDProtocolString(page),
+        String::number(navigationID.toUInt64()), error);
+}
+
+void InspectorPlaywrightAgent::willCreateNewPage(WebPageProxy& page, const WebCore::WindowFeatures& features, const URL& url)
+{
+    if (!m_isEnabled)
+        return;
+
+    m_frontendDispatcher->windowOpen(
+        toPageProxyIDProtocolString(page),
+        url.string(),
+        getEnabledWindowFeatures(features));
+}
+
+static WebsiteDataStore* findDefaultWebsiteDataStore() {
+    WebsiteDataStore* result = nullptr;
+    WebsiteDataStore::forEachWebsiteDataStore([&result] (WebsiteDataStore& dataStore) {
+        if (dataStore.isPersistent()) {
+            RELEASE_ASSERT(result == nullptr);
+            result = &dataStore;
+        }
+    });
+    return result;
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::enable()
+{
+    if (m_isEnabled)
+        return { };
+
+    m_isEnabled = true;
+
+    auto* defaultDataStore = findDefaultWebsiteDataStore();
+    if (!m_defaultContext && defaultDataStore) {
+        auto context = std::make_unique<BrowserContext>();
+        m_defaultContext = context.get();
+        context->processPool = WebProcessPool::allProcessPools().first().ptr();
+        context->dataStore = defaultDataStore;
+        setGeolocationProvider(context.get());
+        // Add default context to the map so that we can easily find it for
+        // created/deleted pages.
+        PAL::SessionID sessionID = context->dataStore->sessionID();
+        m_browserContexts.set(toBrowserContextIDProtocolString(sessionID), WTF::move(context));
+    }
+
+    WebsiteDataStore::forEachWebsiteDataStore([this] (WebsiteDataStore& dataStore) {
+        dataStore.setDownloadInstrumentation(this);
+    });
+    for (Ref pool : WebProcessPool::allProcessPools()) {
+        for (Ref process : pool->processes()) {
+            for (Ref page : process->pages())
+                didCreateInspectorController(WTF::move(page));
+        }
+    }
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::disable()
+{
+    if (!m_isEnabled)
+        return { };
+
+    m_isEnabled = false;
+
+    for (auto it = m_pageProxyChannels.begin(); it != m_pageProxyChannels.end(); ++it)
+        it->value->disconnect();
+    m_pageProxyChannels.clear();
+
+    WebsiteDataStore::forEachWebsiteDataStore([] (WebsiteDataStore& dataStore) {
+        dataStore.setDownloadInstrumentation(nullptr);
+        dataStore.setDownloadForAutomation(std::optional<bool>(), String());
+    });
+    for (auto& it : m_browserContexts) {
+        it.value->dataStore->setDownloadInstrumentation(nullptr);
+        it.value->pages.clear();
+    }
+    m_browserContextDeletions.clear();
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<String> InspectorPlaywrightAgent::getInfo()
+{
+#if PLATFORM(MAC)
+    return { "macOS"_s };
+#elif PLATFORM(GTK) || PLATFORM(WPE)
+    return { "Linux"_s };
+#elif PLATFORM(WIN)
+    return { "Windows"_s };
+#else
+#error "Unsupported platform."
+#endif
+}
+
+void InspectorPlaywrightAgent::close(Ref<CloseCallback>&& callback)
+{
+    closeImpl([callback = WTF::move(callback)] (String error) {
+        if (!callback->isActive())
+            return;
+        if (error.isNull())
+            callback->sendSuccess();
+        else
+            callback->sendFailure(error);
+    });
+}
+
+void InspectorPlaywrightAgent::closeImpl(Function<void(String)>&& callback)
+{
+    Vector<Ref<WebPageProxy>> pages;
+    // If Web Process crashed it will be disconnected from its pool until
+    // the page reloads. So we cannot discover such processes and the pages
+    // by traversing all process pools and their processes. Instead we look at
+    // all existing Web Processes wether in a pool or not.
+    for (Ref process : WebProcessProxy::allProcessesForInspector()) {
+        for (Ref page : process->pages())
+            pages.append(WTF::move(page));
+    }
+    for (Ref page : pages)
+        page->closePage();
+
+    if (!m_defaultContext) {
+        m_client->closeBrowser();
+        callback(String());
+        return;
+    }
+
+    m_defaultContext->dataStore->syncLocalStorage([this, callback = WTF::move(callback)] () {
+        if (m_client == nullptr) {
+            callback("no platform delegate to close browser"_s);
+        } else {
+            m_client->closeBrowser();
+            callback(String());
+        }
+    });
+
+}
+
+Inspector::Protocol::ErrorStringOr<String /* browserContextID */> InspectorPlaywrightAgent::createContext(const String& proxyServer, const String& proxyBypassList, std::optional<bool>&& enableStoragePartitioning)
+{
+    String errorString;
+    std::unique_ptr<BrowserContext> browserContext = m_client->createBrowserContext(errorString, proxyServer, proxyBypassList);
+    if (!browserContext)
+        return makeUnexpected(errorString);
+
+    browserContext->enableStoragePartitioning = WTF::move(enableStoragePartitioning);
+    // Ensure network process.
+    browserContext->dataStore->networkProcess();
+    browserContext->dataStore->setDownloadInstrumentation(this);
+    setGeolocationProvider(browserContext.get());
+    PAL::SessionID sessionID = browserContext->dataStore->sessionID();
+    String browserContextID = toBrowserContextIDProtocolString(sessionID);
+    m_browserContexts.set(browserContextID, WTF::move(browserContext));
+    return browserContextID;
+}
+
+void InspectorPlaywrightAgent::deleteContext(const String& browserContextID, Ref<DeleteContextCallback>&& callback)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!lookupBrowserContext(errorString, browserContextID)) {
+        callback->sendFailure(errorString);
+        return;
+    }
+
+    if (browserContext == m_defaultContext) {
+        callback->sendFailure("Cannot delete default context"_s);
+        return;
+    }
+
+    auto pages = browserContext->pages;
+    PAL::SessionID sessionID = browserContext->dataStore->sessionID();
+    auto contextHolder = m_browserContexts.take(browserContextID);
+    if (pages.isEmpty()) {
+        callback->sendSuccess();
+    } else {
+        m_browserContextDeletions.set(browserContextID, makeUnique<BrowserContextDeletion>(WTF::move(contextHolder), pages.size(), WTF::move(callback)));
+        for (auto* page : pages)
+            page->closePage();
+    }
+    m_client->deleteBrowserContext(errorString, sessionID);
+}
+
+Inspector::Protocol::ErrorStringOr<String /* pageProxyID */> InspectorPlaywrightAgent::createPage(const String& browserContextID)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!browserContext)
+        return makeUnexpected(errorString);
+
+    RefPtr<WebPageProxy> page = m_client->createPage(errorString, *browserContext);
+    if (!page)
+        return makeUnexpected(errorString);
+
+    return toPageProxyIDProtocolString(*page);
+}
+
+WebFrameProxy* InspectorPlaywrightAgent::frameForID(const String& frameID, String& error)
+{
+    std::optional<WebCore::FrameIdentifier> frameIdentifier = WebCore::InspectorPageAgent::parseFrameID(frameID);
+    if (!frameIdentifier) {
+        error = "Invalid frame id"_s;
+        return nullptr;
+    }
+
+    WebFrameProxy* frame = WebFrameProxy::webFrame(*frameIdentifier);
+    if (!frame) {
+        error = "Cannot find web frame for the frame id"_s;
+        return nullptr;
+    }
+
+    return frame;
+}
+
+void InspectorPlaywrightAgent::navigate(const String& url, const String& pageProxyID, const String& frameID, const String& referrer, Ref<NavigateCallback>&& callback)
+{
+    auto* pageProxyChannel = m_pageProxyChannels.get(pageProxyID);
+    if (!pageProxyChannel) {
+        callback->sendFailure("Cannot find page proxy with provided 'pageProxyId'"_s);
+        return;
+    }
+
+    auto resourceRequest = WebCore::ResourceRequest(URL { url });
+
+    if (!!referrer)
+        resourceRequest.setHTTPReferrer(referrer);
+
+    if (!resourceRequest.url().isValid()) {
+        callback->sendFailure("Cannot navigate to invalid URL"_s);
+        return;
+    }
+
+    WebFrameProxy* frame = nullptr;
+    if (!!frameID) {
+        String error;
+        frame = frameForID(frameID, error);
+        if (!frame) {
+            callback->sendFailure(error);
+            return;
+        }
+
+        if (frame->page() != &pageProxyChannel->page()) {
+            callback->sendFailure("Frame with specified is not from the specified page"_s);
+            return;
+        }
+    }
+
+    pageProxyChannel->page().inspectorController().navigate(WTF::move(resourceRequest), frame, [callback = WTF::move(callback)](const String& error, Markable<WebCore::NavigationIdentifier> navigationID) {
+        if (!error.isEmpty()) {
+            callback->sendFailure(error);
+            return;
+        }
+
+        String navigationIDString;
+        if (navigationID)
+            navigationIDString = String::number(navigationID->toUInt64());
+        callback->sendSuccess(navigationIDString);
+    });
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::grantFileReadAccess(const String& pageProxyID, Ref<JSON::Array>&& paths)
+{
+#if ENABLE(SANDBOX_EXTENSIONS)
+    auto* pageProxyChannel = m_pageProxyChannels.get(pageProxyID);
+    if (!pageProxyChannel)
+        return makeUnexpected("Unknown pageProxyID"_s);
+
+    Vector<String> files;
+    for (const auto& value : paths.get()) {
+        String path;
+        if (!value->asString(path))
+            return makeUnexpected("Filr path must be a string"_s);
+
+        files.append(path);
+    }
+
+    auto sandboxExtensionHandles = SandboxExtension::createReadOnlyHandlesForFiles("InspectorPlaywrightAgent::grantFileReadAccess"_s, files);
+    pageProxyChannel->page().legacyMainFrameProcess().send(Messages::WebPage::ExtendSandboxForFilesFromOpenPanel(WTF::move(sandboxExtensionHandles)), pageProxyChannel->page().webPageIDInMainFrameProcess());
+#endif
+    return { };
+}
+
+void InspectorPlaywrightAgent::takePageScreenshot(const String& pageProxyID, int x, int y, int width, int height, std::optional<bool>&& omitDeviceScaleFactor, Ref<TakePageScreenshotCallback>&& callback)
+{
+#if PLATFORM(MAC) || PLATFORM(GTK) || PLATFORM(WPE)
+    auto* pageProxyChannel = m_pageProxyChannels.get(pageProxyID);
+    if (!pageProxyChannel) {
+        callback->sendFailure("Unknown pageProxyID"_s);
+        return;
+    }
+
+    bool nominalResolution = omitDeviceScaleFactor.has_value() && *omitDeviceScaleFactor;
+    WebCore::IntRect clip(x, y, width, height);
+    m_client->takePageScreenshot(pageProxyChannel->page(), WTF::move(clip), nominalResolution, [callback = WTF::move(callback)](const String& error, const String& data) {
+        if (error.isEmpty())
+            callback->sendSuccess(data);
+        else
+            callback->sendFailure(error);
+    });
+#else
+    return callback->sendFailure("This method is not supported on this platform."_s);
+#endif
+}
+
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::setIgnoreCertificateErrors(const String& browserContextID, bool ignore)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    browserContext->dataStore->setIgnoreTLSErrors(ignore);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::setPageZoomFactor(const String& pageProxyID, double zoomFactor)
+{
+    auto* pageProxyChannel = m_pageProxyChannels.get(pageProxyID);
+    if (!pageProxyChannel)
+        return makeUnexpected("Unknown pageProxyID"_s);
+
+    pageProxyChannel->page().setPageZoomFactor(zoomFactor);
+    return { };
+}
+
+void InspectorPlaywrightAgent::getAllCookies(const String& browserContextID, Ref<GetAllCookiesCallback>&& callback) {
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty()) {
+        callback->sendFailure(errorString);
+        return;
+    }
+
+    browserContext->dataStore->cookieStore().cookies(
+        [callback = WTF::move(callback)](const Vector<WebCore::Cookie>& allCookies) {
+            if (!callback->isActive())
+                return;
+            auto cookies = JSON::ArrayOf<Inspector::Protocol::Playwright::Cookie>::create();
+
+            for (const auto& cookie : allCookies)
+                cookies->addItem(buildObjectForCookie(cookie));
+            callback->sendSuccess(WTF::move(cookies));
+        });
+}
+
+void InspectorPlaywrightAgent::setCookies(const String& browserContextID, Ref<JSON::Array>&& in_cookies, Ref<SetCookiesCallback>&& callback) {
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty()) {
+        callback->sendFailure(errorString);
+        return;
+    }
+
+    Vector<WebCore::Cookie> cookies;
+    for (unsigned i = 0; i < in_cookies->length(); ++i) {
+        RefPtr<JSON::Value> item = in_cookies->get(i);
+        RefPtr<JSON::Object> obj = item->asObject();
+        if (!obj) {
+            callback->sendFailure("Invalid cookie payload format"_s);
+            return;
+        }
+
+        WebCore::Cookie cookie;
+        cookie.name = obj->getString("name"_s);
+        cookie.value = obj->getString("value"_s);
+        cookie.domain = obj->getString("domain"_s);
+        cookie.path = obj->getString("path"_s);
+        if (!cookie.name || !cookie.value || !cookie.domain || !cookie.path) {
+            callback->sendFailure("Invalid file payload format"_s);
+            return;
+        }
+
+        std::optional<double> expires = obj->getDouble("expires"_s);
+        if (expires && *expires != -1)
+            cookie.expires = *expires;
+        if (std::optional<bool> value = obj->getBoolean("httpOnly"_s))
+            cookie.httpOnly = *value;
+        if (std::optional<bool> value = obj->getBoolean("secure"_s))
+            cookie.secure = *value;
+        if (std::optional<bool> value = obj->getBoolean("session"_s))
+            cookie.session = *value;
+        String sameSite;
+        if (obj->getString("sameSite"_s, sameSite)) {
+            if (sameSite == "None"_s)
+                cookie.sameSite = WebCore::Cookie::SameSitePolicy::None;
+            if (sameSite == "Lax"_s)
+                cookie.sameSite = WebCore::Cookie::SameSitePolicy::Lax;
+            if (sameSite == "Strict"_s)
+                cookie.sameSite = WebCore::Cookie::SameSitePolicy::Strict;
+#if USE(SOUP)
+        } else {
+            // Cookies are Lax by default in libsoup and will reject cookies with
+            // sameSite: None and secure: false (defaults in WebCore::Cookie).
+            cookie.sameSite = WebCore::Cookie::SameSitePolicy::Lax;
+#endif
+        }
+        cookies.append(WTF::move(cookie));
+    }
+
+    browserContext->dataStore->cookieStore().setCookies(WTF::move(cookies),
+        [callback = WTF::move(callback)]() {
+            if (!callback->isActive())
+                return;
+            callback->sendSuccess();
+        });
+}
+
+void InspectorPlaywrightAgent::deleteAllCookies(const String& browserContextID, Ref<DeleteAllCookiesCallback>&& callback) {
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty()) {
+        callback->sendFailure(errorString);
+        return;
+    }
+
+    browserContext->dataStore->cookieStore().deleteAllCookies(
+        [callback = WTF::move(callback)]() {
+            if (!callback->isActive())
+                return;
+            callback->sendSuccess();
+        });
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::setLanguages(Ref<JSON::Array>&& languages, const String& browserContextID)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    Vector<String> items;
+    for (const auto& value : languages.get()) {
+        String language;
+        if (!value->asString(language))
+            return makeUnexpected("Language must be a string"_s);
+
+        items.append(language);
+    }
+
+    browserContext->processPool->configuration().setOverrideLanguages(WTF::move(items));
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::setDownloadBehavior(const String& behavior, const String& downloadPath, const String& browserContextID)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    std::optional<bool> allow;
+    if (behavior == "allow"_s)
+      allow = true;
+    if (behavior == "deny"_s)
+      allow = false;
+    browserContext->dataStore->setDownloadForAutomation(allow, downloadPath);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::setGeolocationOverride(const String& browserContextID, RefPtr<JSON::Object>&& geolocation)
+{
+    String errorString;
+    BrowserContext* browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty())
+        return makeUnexpected(errorString);
+
+    auto* geoManager = browserContext->processPool->supplement<WebGeolocationManagerProxy>();
+    if (!geoManager)
+        return makeUnexpected("Internal error: geolocation manager is not available."_s);
+
+    if (geolocation) {
+        std::optional<double> timestamp = geolocation->getDouble("timestamp"_s);
+        std::optional<double> latitude = geolocation->getDouble("latitude"_s);
+        std::optional<double> longitude = geolocation->getDouble("longitude"_s);
+        std::optional<double> accuracy = geolocation->getDouble("accuracy"_s);
+        if (!timestamp || !latitude || !longitude || !accuracy)
+            return makeUnexpected("Invalid geolocation format"_s);
+
+        auto position = WebGeolocationPosition::create(WebCore::GeolocationPositionData(*timestamp, *latitude, *longitude, *accuracy));
+        if (!browserContext->geolocationProvider)
+            return makeUnexpected("Internal error: geolocation provider has been destroyed."_s);
+        browserContext->geolocationProvider->setPosition(position);
+        geoManager->providerDidChangePosition(&position.get());
+    } else {
+        geoManager->providerDidFailToDeterminePosition("Position unavailable"_s);
+    }
+    return { };
+}
+
+void InspectorPlaywrightAgent::downloadCreated(const String& uuid, const WebCore::ResourceRequest& request, const FrameInfoData& frameInfoData, WebPageProxy* page, RefPtr<DownloadProxy> download)
+{
+    if (!m_isEnabled)
+        return;
+    String frameID = WebCore::InspectorPageAgent::serializeFrameID(frameInfoData.frameID);
+    m_downloads.set(uuid, download);
+    m_frontendDispatcher->downloadCreated(
+        toPageProxyIDProtocolString(*page),
+        frameID,
+        uuid, request.url().string());
+}
+
+void InspectorPlaywrightAgent::downloadFilenameSuggested(const String& uuid, const String& suggestedFilename)
+{
+    if (!m_isEnabled)
+        return;
+    m_frontendDispatcher->downloadFilenameSuggested(uuid, suggestedFilename);
+}
+
+void InspectorPlaywrightAgent::downloadFinished(const String& uuid, const String& error)
+{
+    if (!m_isEnabled)
+        return;
+    m_frontendDispatcher->downloadFinished(uuid, error);
+    m_downloads.remove(uuid);
+}
+
+Inspector::Protocol::ErrorStringOr<void> InspectorPlaywrightAgent::cancelDownload(const String& uuid)
+{
+    if (!m_isEnabled)
+        return { };
+    auto download = m_downloads.get(uuid);
+    if (!download)
+        return { };
+    download->cancel([] (auto*) {});
+    return { };
+}
+
+void InspectorPlaywrightAgent::clearMemoryCache(const String& browserContextID, Ref<ClearMemoryCacheCallback>&& callback)
+{
+    if (!m_isEnabled) {
+        callback->sendSuccess();
+        return;
+    }
+    String errorString;
+    auto browserContext = lookupBrowserContext(errorString, browserContextID);
+    if (!errorString.isEmpty()) {
+        callback->sendFailure(errorString);
+        return;
+    }
+    browserContext->dataStore->removeData(WebKit::WebsiteDataType::MemoryCache, -WallTime::infinity(), [callback] {
+        callback->sendSuccess();
+    });
+}
+
+BrowserContext* InspectorPlaywrightAgent::getExistingBrowserContext(const String& browserContextID)
+{
+    BrowserContext* browserContext = m_browserContexts.get(browserContextID);
+    if (browserContext)
+        return browserContext;
+
+    auto it = m_browserContextDeletions.find(browserContextID);
+    RELEASE_ASSERT(it != m_browserContextDeletions.end());
+    return it->value->context();
+}
+
+BrowserContext* InspectorPlaywrightAgent::lookupBrowserContext(ErrorString& errorString, const String& browserContextID)
+{
+    if (!browserContextID) {
+        if (!m_defaultContext)
+            errorString = "Browser started with no default context"_s;
+        return m_defaultContext;
+    }
+
+    BrowserContext* browserContext = m_browserContexts.get(browserContextID);
+    if (!browserContext)
+        errorString = "Could not find browser context for given id"_s;
+    return browserContext;
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/InspectorPlaywrightAgent.h b/Source/WebKit/UIProcess/InspectorPlaywrightAgent.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e31698788ab79bc3807b9f29fa2ebc026374909
--- /dev/null
+++ b/Source/WebKit/UIProcess/InspectorPlaywrightAgent.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgentClient.h"
+#include <JavaScriptCore/InspectorBackendDispatchers.h>
+#include "WebPageInspectorController.h"
+#include "WebProcessPool.h"
+#include "DownloadProxy.h"
+#include <wtf/HashMap.h>
+#include <wtf/Forward.h>
+#include <wtf/Noncopyable.h>
+#include <WebCore/NavigationIdentifier.h>
+
+namespace Inspector {
+class BackendDispatcher;
+class FrontendChannel;
+class FrontendRouter;
+class PlaywrightFrontendDispatcher;
+}
+
+namespace PAL {
+class SessionID;
+}
+
+namespace WebKit {
+class OverridenGeolocationProvider;
+}
+
+namespace WTF {
+template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
+template<> struct IsDeprecatedWeakRefSmartPointerException<WebKit::OverridenGeolocationProvider> : std::true_type { };
+}
+
+namespace WebKit {
+
+class WebFrameProxy;
+
+class InspectorPlaywrightAgent final
+    : public WebPageInspectorControllerObserver
+    , public Inspector::PlaywrightBackendDispatcherHandler
+    , public DownloadInstrumentation {
+    WTF_MAKE_NONCOPYABLE(InspectorPlaywrightAgent);
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgent);
+public:
+    explicit InspectorPlaywrightAgent(std::unique_ptr<InspectorPlaywrightAgentClient> client);
+    ~InspectorPlaywrightAgent() override;
+
+    // Transport
+    void connectFrontend(Inspector::FrontendChannel&);
+    void disconnectFrontend();
+    void dispatchMessageFromFrontend(const String& message);
+
+private:
+    class BrowserContextDeletion;
+    class PageProxyChannel;
+    class TargetHandler;
+
+    // WebPageInspectorControllerObserver
+    void didCreateInspectorController(WebPageProxy&) override;
+    void willDestroyInspectorController(WebPageProxy&) override;
+    void didFailProvisionalLoad(WebPageProxy&, WebCore::NavigationIdentifier navigationID, const String& error) override;
+    void willCreateNewPage(WebPageProxy&, const WebCore::WindowFeatures&, const URL&) override;
+
+    // PlaywrightDispatcherHandler
+    Inspector::Protocol::ErrorStringOr<void> enable() override;
+    Inspector::Protocol::ErrorStringOr<void> disable() override;
+    Inspector::Protocol::ErrorStringOr<String> getInfo() override;
+    void close(Ref<CloseCallback>&&) override;
+    Inspector::Protocol::ErrorStringOr<String /* browserContextID */> createContext(const String& proxyServer, const String& proxyBypassList, std::optional<bool>&& enableStoragePartitioning) override;
+    void deleteContext(const String& browserContextID, Ref<DeleteContextCallback>&& callback) override;
+    Inspector::Protocol::ErrorStringOr<String /* pageProxyID */> createPage(const String& browserContextID) override;
+    void navigate(const String& url, const String& pageProxyID, const String& frameId, const String& referrer, Ref<NavigateCallback>&&) override;
+    Inspector::Protocol::ErrorStringOr<void> grantFileReadAccess(const String& pageProxyID, Ref<JSON::Array>&& paths) override;
+    void takePageScreenshot(const String& pageProxyID, int x, int y, int width, int height, std::optional<bool>&& omitDeviceScaleFactor, Ref<TakePageScreenshotCallback>&&) override;
+    Inspector::Protocol::ErrorStringOr<void> setIgnoreCertificateErrors(const String& browserContextID, bool ignore) override;
+    Inspector::Protocol::ErrorStringOr<void> setPageZoomFactor(const String& pageProxyID, double zoomFactor) override;
+
+    void getAllCookies(const String& browserContextID, Ref<GetAllCookiesCallback>&&) override;
+    void setCookies(const String& browserContextID, Ref<JSON::Array>&& in_cookies, Ref<SetCookiesCallback>&&) override;
+    void deleteAllCookies(const String& browserContextID, Ref<DeleteAllCookiesCallback>&&) override;
+
+    Inspector::Protocol::ErrorStringOr<void> setGeolocationOverride(const String& browserContextID, RefPtr<JSON::Object>&& geolocation) override;
+    Inspector::Protocol::ErrorStringOr<void> setLanguages(Ref<JSON::Array>&& languages, const String& browserContextID) override;
+    Inspector::Protocol::ErrorStringOr<void> setDownloadBehavior(const String& behavior, const String& downloadPath, const String& browserContextID) override;
+    Inspector::Protocol::ErrorStringOr<void> cancelDownload(const String& uuid) override;
+    void clearMemoryCache(const String& browserContextID, Ref<ClearMemoryCacheCallback>&&) override;
+
+    // DownloadInstrumentation
+    void downloadCreated(const String& uuid, const WebCore::ResourceRequest&, const FrameInfoData& frameInfoData, WebPageProxy* page, RefPtr<DownloadProxy> download) override;
+    void downloadFilenameSuggested(const String& uuid, const String& suggestedFilename) override;
+    void downloadFinished(const String& uuid, const String& error) override;
+
+    BrowserContext* getExistingBrowserContext(const String& browserContextID);
+    BrowserContext* lookupBrowserContext(Inspector::ErrorString&, const String& browserContextID);
+    WebFrameProxy* frameForID(const String& frameID, String& error);
+    void closeImpl(Function<void(String)>&&);
+
+    Inspector::FrontendChannel* m_frontendChannel { nullptr };
+    Ref<Inspector::FrontendRouter> m_frontendRouter;
+    Ref<Inspector::BackendDispatcher> m_backendDispatcher;
+    std::unique_ptr<InspectorPlaywrightAgentClient> m_client;
+    std::unique_ptr<Inspector::PlaywrightFrontendDispatcher> m_frontendDispatcher;
+    Ref<Inspector::PlaywrightBackendDispatcher> m_playwrightDispatcher;
+    UncheckedKeyHashMap<String, std::unique_ptr<PageProxyChannel>> m_pageProxyChannels;
+    BrowserContext* m_defaultContext;
+    UncheckedKeyHashMap<String, RefPtr<DownloadProxy>> m_downloads;
+    UncheckedKeyHashMap<String, std::unique_ptr<BrowserContext>> m_browserContexts;
+    UncheckedKeyHashMap<String, std::unique_ptr<BrowserContextDeletion>> m_browserContextDeletions;
+    bool m_isEnabled { false };
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/InspectorPlaywrightAgentClient.h b/Source/WebKit/UIProcess/InspectorPlaywrightAgentClient.h
new file mode 100644
index 0000000000000000000000000000000000000000..af71e4077eb0c6f95396de7bfef89a3efb5f12d9
--- /dev/null
+++ b/Source/WebKit/UIProcess/InspectorPlaywrightAgentClient.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include <memory>
+#include <pal/SessionID.h>
+#include <WebCore/IntRect.h>
+#include <wtf/Forward.h>
+#include <wtf/HashSet.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/RefCounted.h>
+#include <wtf/WeakPtr.h>
+
+namespace WebKit {
+
+class OverridenGeolocationProvider;
+class WebsiteDataStore;
+class WebPageProxy;
+class WebProcessPool;
+
+class BrowserContext {
+    WTF_MAKE_NONCOPYABLE(BrowserContext);
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(BrowserContext);
+public:
+    BrowserContext();
+    ~BrowserContext();
+
+    RefPtr<WebsiteDataStore> dataStore;
+    RefPtr<WebProcessPool> processPool;
+    HashSet<WebPageProxy*> pages;
+    WeakPtr<OverridenGeolocationProvider> geolocationProvider;
+    std::optional<bool> enableStoragePartitioning;
+};
+
+class InspectorPlaywrightAgentClient {
+public:
+    virtual ~InspectorPlaywrightAgentClient() = default;
+    virtual RefPtr<WebKit::WebPageProxy> createPage(WTF::String& error, const BrowserContext& context) = 0;
+    virtual void closeBrowser() = 0;
+    virtual std::unique_ptr<BrowserContext> createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList) = 0;
+    virtual void deleteBrowserContext(WTF::String& error, PAL::SessionID) = 0;
+#if PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)
+    virtual void takePageScreenshot(WebPageProxy&, WebCore::IntRect&& clip, bool nominalResolution, CompletionHandler<void(const String&, const String&)>&& completionHandler) = 0;
+#endif
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/Launcher/glib/ProcessLauncherGLib.cpp b/Source/WebKit/UIProcess/Launcher/glib/ProcessLauncherGLib.cpp
index 9e0f05585ae96f4ec9ab2390cb015b5307fe85e6..048dfad9f9221fc5389de5d7874a0a67ec61499a 100644
--- a/Source/WebKit/UIProcess/Launcher/glib/ProcessLauncherGLib.cpp
+++ b/Source/WebKit/UIProcess/Launcher/glib/ProcessLauncherGLib.cpp
@@ -160,6 +160,13 @@ void ProcessLauncher::launchProcess()
         nargs++;
     }
 #endif
+// Playwright begin
+    bool enableSharedArrayBuffer = false;
+    if (m_launchOptions.processType == ProcessLauncher::ProcessType::Web && m_client && m_client->shouldEnableSharedArrayBuffer()) {
+        enableSharedArrayBuffer = true;
+        nargs++;
+    }
+// Playwright end
 
     Vector<char*> argv(nargs);
     unsigned i = 0;
@@ -175,6 +182,10 @@ void ProcessLauncher::launchProcess()
     if (configureJSCForTesting)
         argv[i++] = const_cast<char*>("--configure-jsc-for-testing");
 #endif
+// Playwright begin
+    if (enableSharedArrayBuffer)
+        argv[i++] = const_cast<char*>("--enable-shared-array-buffer");
+// Playwright end
     argv[i++] = nullptr;
 
     // Warning: we want GIO to be able to spawn with posix_spawn() rather than fork()/exec(), in
diff --git a/Source/WebKit/UIProcess/Launcher/win/ProcessLauncherWin.cpp b/Source/WebKit/UIProcess/Launcher/win/ProcessLauncherWin.cpp
index 6723ee0d9943be07bc8ad09d2b678838aca968df..0d7fb3c7b1a4c877a2ff2f2189d12c7d00eb8f7b 100644
--- a/Source/WebKit/UIProcess/Launcher/win/ProcessLauncherWin.cpp
+++ b/Source/WebKit/UIProcess/Launcher/win/ProcessLauncherWin.cpp
@@ -91,14 +91,21 @@ void ProcessLauncher::launchProcess()
         commandLineBuilder.append(" -configure-jsc-for-testing"_s);
     if (!m_client->isJITEnabled())
         commandLineBuilder.append(" -disable-jit"_s);
+// Playwright begin
+    if (m_launchOptions.processType == ProcessLauncher::ProcessType::Web && m_client->shouldEnableSharedArrayBuffer())
+        commandLineBuilder.append(" -enable-shared-array-buffer"_s);
+// Playwright end
     commandLineBuilder.append('\0');
 
     auto commandLine = commandLineBuilder.toString().wideCharacters();
 
     STARTUPINFO startupInfo { };
     startupInfo.cb = sizeof(startupInfo);
-    startupInfo.dwFlags = STARTF_USESHOWWINDOW;
+    startupInfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
     startupInfo.wShowWindow = SW_HIDE;
+    startupInfo.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
+    startupInfo.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
+    startupInfo.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
     PROCESS_INFORMATION processInformation { };
     BOOL result = ::CreateProcess(0, commandLine.mutableSpan().data(), 0, 0, true, 0, 0, 0, &startupInfo, &processInformation);
 
diff --git a/Source/WebKit/UIProcess/Media/RemoteMediaSessionManagerProxy.cpp b/Source/WebKit/UIProcess/Media/RemoteMediaSessionManagerProxy.cpp
index e9bf93632655ddfe5104808d67cb1e550e965098..a62ab1cb298654ea69cc8131f275d2cc7fe75602 100644
--- a/Source/WebKit/UIProcess/Media/RemoteMediaSessionManagerProxy.cpp
+++ b/Source/WebKit/UIProcess/Media/RemoteMediaSessionManagerProxy.cpp
@@ -31,6 +31,7 @@
 #include "MessageSenderInlines.h"
 #include "RemoteMediaSessionClientProxy.h"
 #include "RemoteMediaSessionManagerMessages.h"
+#include "RemoteMediaSessionManager.h"
 #include "RemoteMediaSessionManagerProxyMessages.h"
 #include "RemoteMediaSessionProxy.h"
 #include "RemoteMediaSessionState.h"
diff --git a/Source/WebKit/UIProcess/PageClient.h b/Source/WebKit/UIProcess/PageClient.h
index ec8a8accd195844f2ceb5fea0d73bc0ab50ce733..164e60cbc7fbd520d4d43a99021891c770f1fe3e 100644
--- a/Source/WebKit/UIProcess/PageClient.h
+++ b/Source/WebKit/UIProcess/PageClient.h
@@ -77,6 +77,11 @@
 #include <WebCore/PlatformTextAlternatives.h>
 #endif
 
+#if USE(SKIA)
+#include <skia/core/SkData.h>
+#include <skia/core/SkImage.h>
+#endif
+
 OBJC_CLASS AVPlayerViewController;
 OBJC_CLASS CALayer;
 OBJC_CLASS NSFileWrapper;
@@ -400,7 +405,15 @@ public:
     virtual void selectionDidChange() = 0;
 #endif
 
-#if PLATFORM(COCOA) || PLATFORM(GTK) || PLATFORM(WPE)
+// Paywright begin
+#if PLATFORM(COCOA)
+    virtual RetainPtr<CGImageRef> takeSnapshotForAutomation() = 0;
+#elif PLATFORM(GTK) || PLATFORM(WPE)
+    virtual RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&, bool nominalResolution = false) = 0;
+#endif
+// Paywright end
+
+#if PLATFORM(COCOA)
     virtual RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&) = 0;
 #endif
 
diff --git a/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.cpp b/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..95b682567eba682f927317cd3327a531358dfebc
--- /dev/null
+++ b/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2023 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "config.h"
+#include "PlaywrightFullScreenManagerProxyClient.h"
+
+#if ENABLE(FULLSCREEN_API)
+
+#include "WebPageProxy.h"
+
+namespace WebKit {
+using namespace WebCore;
+
+PlaywrightFullScreenManagerProxyClient::PlaywrightFullScreenManagerProxyClient(WebPageProxy& page)
+    : m_pageProxy(page)
+{
+}
+
+void PlaywrightFullScreenManagerProxyClient::enterFullScreen(WebCore::FloatSize, CompletionHandler<void(bool)>&& completionHandler)
+{
+    completionHandler(true);
+}
+
+void PlaywrightFullScreenManagerProxyClient::exitFullScreen(CompletionHandler<void()>&& completionHandler)
+{
+    completionHandler();
+}
+
+void PlaywrightFullScreenManagerProxyClient::beganEnterFullScreen(const WebCore::IntRect&, const WebCore::IntRect&, CompletionHandler<void(bool)>&& completionHandler)
+{
+    completionHandler(true);
+}
+
+void PlaywrightFullScreenManagerProxyClient::beganExitFullScreen(const WebCore::IntRect&, const WebCore::IntRect&, CompletionHandler<void()>&& completionHandler)
+{
+    completionHandler();
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(FULLSCREEN_API)
diff --git a/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.h b/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.h
new file mode 100644
index 0000000000000000000000000000000000000000..f855bb5ff6e91cc3383fb9a96d32392ff7aa5493
--- /dev/null
+++ b/Source/WebKit/UIProcess/PlaywrightFullScreenManagerProxyClient.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2023 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(FULLSCREEN_API)
+
+#include "WebFullScreenManagerProxy.h"
+
+namespace WebKit {
+
+class WebPageProxy;
+
+class PlaywrightFullScreenManagerProxyClient : public WebFullScreenManagerProxyClient {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(PlaywrightFullScreenManagerProxyClient);
+public:
+    PlaywrightFullScreenManagerProxyClient(WebPageProxy&);
+    ~PlaywrightFullScreenManagerProxyClient() override = default;
+
+private:
+    void closeFullScreenManager() override { }
+    bool isFullScreen() override { return m_isFullScreen; }
+    void enterFullScreen(WebCore::FloatSize mediaDimensions, CompletionHandler<void(bool)>&&) override;
+    void exitFullScreen(CompletionHandler<void()>&&) override;
+    void beganEnterFullScreen(const WebCore::IntRect& initialFrame, const WebCore::IntRect& finalFrame, CompletionHandler<void(bool)>&&) override;
+    void beganExitFullScreen(const WebCore::IntRect& initialFrame, const WebCore::IntRect& finalFrame, CompletionHandler<void()>&&) override;
+
+    WebPageProxy& m_pageProxy;
+    bool m_isFullScreen { false };
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(FULLSCREEN_API)
diff --git a/Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp b/Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp
index 0e8f21982c6499e6886f5db6c193afc43663f29c..43ed4c8837479744a98ef76ceb2911c0e49d3f2b 100644
--- a/Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp
+++ b/Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp
@@ -25,6 +25,7 @@
 
 #include "config.h"
 #include "ProvisionalFrameProxy.h"
+#include "WebFrameProxy.h"
 
 #include "FrameProcess.h"
 #include "ProvisionalFrameCreationParameters.h"
diff --git a/Source/WebKit/UIProcess/ProvisionalPageProxy.h b/Source/WebKit/UIProcess/ProvisionalPageProxy.h
index 90b6b6b10906e9bf9f4229dc413421380be8a01a..0620c78e35e40e5b4997ab3813cac98cfdef7372 100644
--- a/Source/WebKit/UIProcess/ProvisionalPageProxy.h
+++ b/Source/WebKit/UIProcess/ProvisionalPageProxy.h
@@ -32,8 +32,10 @@
 #include "ProcessThrottler.h"
 #include "SandboxExtension.h"
 #include "WebFramePolicyListenerProxy.h"
+#include "WebPageProxy.h"
 #include "WebPageProxyIdentifier.h"
 #include "WebPageProxyMessageReceiverRegistration.h"
+#include "WebsiteDataStore.h"
 #include <WebCore/DiagnosticLoggingClient.h>
 #include <WebCore/FrameIdentifier.h>
 #include <WebCore/FrameLoaderClient.h>
@@ -74,7 +76,6 @@ class WebBackForwardListItem;
 class WebFrameProxy;
 class WebPageProxy;
 class WebProcessProxy;
-class WebsiteDataStore;
 
 struct FrameInfoData;
 struct NavigationActionData;
diff --git a/Source/WebKit/UIProcess/RemoteInspectorPipe.cpp b/Source/WebKit/UIProcess/RemoteInspectorPipe.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a5fe95e4019e5b2b4e510174111166fb36089e9a
--- /dev/null
+++ b/Source/WebKit/UIProcess/RemoteInspectorPipe.cpp
@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "RemoteInspectorPipe.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgent.h"
+#include <JavaScriptCore/InspectorFrontendChannel.h>
+#include <wtf/Compiler.h>
+#include <wtf/MainThread.h>
+#include <wtf/RunLoop.h>
+#include <wtf/UniqueArray.h>
+#include <wtf/Vector.h>
+#include <wtf/WorkQueue.h>
+
+#if OS(UNIX)
+#include <stdio.h>
+#include <unistd.h>
+#endif
+
+#if PLATFORM(WIN)
+#include <io.h>
+#endif
+
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
+
+namespace WebKit {
+
+namespace {
+
+const int readFD = 3;
+const int writeFD = 4;
+
+const size_t kWritePacketSize = 1 << 16;
+
+#if PLATFORM(WIN)
+HANDLE readHandle;
+HANDLE writeHandle;
+#endif
+
+size_t ReadBytes(void* buffer, size_t size, bool exact_size)
+{
+    size_t bytesRead = 0;
+    while (bytesRead < size) {
+#if PLATFORM(WIN)
+        DWORD sizeRead = 0;
+        bool hadError = !ReadFile(readHandle, static_cast<char*>(buffer) + bytesRead,
+            size - bytesRead, &sizeRead, nullptr);
+#else
+        int sizeRead = read(readFD, static_cast<char*>(buffer) + bytesRead,
+            size - bytesRead);
+        if (sizeRead < 0 && errno == EINTR)
+            continue;
+        bool hadError = sizeRead <= 0;
+#endif
+        if (hadError) {
+            return 0;
+        }
+        bytesRead += sizeRead;
+        if (!exact_size)
+            break;
+    }
+    return bytesRead;
+}
+
+void WriteBytes(const char* bytes, size_t size)
+{
+    size_t totalWritten = 0;
+    while (totalWritten < size) {
+        size_t length = size - totalWritten;
+        if (length > kWritePacketSize)
+            length = kWritePacketSize;
+#if PLATFORM(WIN)
+        DWORD bytesWritten = 0;
+        bool hadError = !WriteFile(writeHandle, bytes + totalWritten, static_cast<DWORD>(length), &bytesWritten, nullptr);
+#else
+        int bytesWritten = write(writeFD, bytes + totalWritten, length);
+        if (bytesWritten < 0 && errno == EINTR)
+            continue;
+        bool hadError = bytesWritten <= 0;
+#endif
+        if (hadError)
+            return;
+        totalWritten += bytesWritten;
+    }
+}
+
+}  // namespace
+
+class RemoteInspectorPipe::RemoteFrontendChannel : public Inspector::FrontendChannel {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(RemoteInspectorPipe::RemoteFrontendChannel);
+public:
+    RemoteFrontendChannel()
+        : m_senderQueue(WorkQueue::create("Inspector pipe writer"_s))
+    {
+    }
+
+    ~RemoteFrontendChannel() override = default;
+
+    ConnectionType connectionType() const override
+    {
+        return ConnectionType::Remote;
+    }
+
+    void sendMessageToFrontend(const String& message) override
+    {
+        m_senderQueue->dispatch([message = message.isolatedCopy()]() {
+            auto utf8 = message.utf8();
+            WriteBytes(utf8.data(), utf8.length());
+            WriteBytes("\0", 1);
+        });
+    }
+
+private:
+    Ref<WorkQueue> m_senderQueue;
+};
+
+RemoteInspectorPipe::RemoteInspectorPipe(InspectorPlaywrightAgent& playwrightAgent)
+    : m_playwrightAgent(playwrightAgent)
+{
+    m_remoteFrontendChannel = makeUnique<RemoteFrontendChannel>();
+    start();
+}
+
+RemoteInspectorPipe::~RemoteInspectorPipe()
+{
+    stop();
+}
+
+bool RemoteInspectorPipe::start()
+{
+    if (m_receiverThread)
+        return true;
+
+#if PLATFORM(WIN)
+    readHandle = reinterpret_cast<HANDLE>(_get_osfhandle(readFD));
+    writeHandle = reinterpret_cast<HANDLE>(_get_osfhandle(writeFD));
+#endif
+
+    m_playwrightAgent.connectFrontend(*m_remoteFrontendChannel);
+    m_terminated = false;
+    m_receiverThread = Thread::create("Inspector pipe reader"_s, [this] {
+        workerRun();
+    });
+    return true;
+}
+
+void RemoteInspectorPipe::stop()
+{
+    if (!m_receiverThread)
+        return;
+
+    m_playwrightAgent.disconnectFrontend();
+
+    m_terminated = true;
+    m_receiverThread->waitForCompletion();
+    m_receiverThread = nullptr;
+}
+
+void RemoteInspectorPipe::workerRun()
+{
+    const size_t bufSize = 256 * 1024;
+    auto buffer = makeUniqueArray<char>(bufSize);
+    Vector<char> line;
+    while (!m_terminated) {
+        size_t size = ReadBytes(buffer.get(), bufSize, false);
+        if (!size) {
+            RunLoop::mainSingleton().dispatch([this] {
+                if (!m_terminated)
+                    m_playwrightAgent.disconnectFrontend();
+            });
+            break;
+        }
+        size_t start = 0;
+        size_t end = line.size();
+        line.append(std::span { buffer.get(), size });
+        while (true) {
+            for (; end < line.size(); ++end) {
+                if (line[end] == '\0')
+                    break;
+            }
+            if (end == line.size())
+                break;
+
+            if (end > start) {
+                String message = String::fromUTF8({ line.mutableSpan().data() + start, end - start });
+                RunLoop::mainSingleton().dispatch([this, message = WTF::move(message)] {
+                    if (!m_terminated)
+                        m_playwrightAgent.dispatchMessageFromFrontend(message);
+                });
+            }
+            ++end;
+            start = end;
+        }
+        if (start != 0 && start < line.size())
+            memmove(line.mutableSpan().data(), line.mutableSpan().data() + start, line.size() - start);
+        line.shrink(line.size() - start);
+    }
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
+
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
diff --git a/Source/WebKit/UIProcess/RemoteInspectorPipe.h b/Source/WebKit/UIProcess/RemoteInspectorPipe.h
new file mode 100644
index 0000000000000000000000000000000000000000..23626aa70d5a14e6484c81e05b146b375379be4f
--- /dev/null
+++ b/Source/WebKit/UIProcess/RemoteInspectorPipe.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include <wtf/Ref.h>
+#include <wtf/RefPtr.h>
+#include <wtf/Threading.h>
+
+namespace Inspector {
+class FrontendChannel;
+}
+
+namespace WebKit {
+
+class InspectorPlaywrightAgent;
+
+class RemoteInspectorPipe {
+    WTF_MAKE_NONCOPYABLE(RemoteInspectorPipe);
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(RemoteInspectorPipe);
+public:
+    explicit RemoteInspectorPipe(InspectorPlaywrightAgent&);
+    ~RemoteInspectorPipe();
+
+private:
+    class RemoteFrontendChannel;
+
+    bool start();
+    void stop();
+
+    void workerRun();
+
+    RefPtr<Thread> m_receiverThread;
+    std::atomic<bool> m_terminated { false };
+    std::unique_ptr<Inspector::FrontendChannel> m_remoteFrontendChannel;
+    InspectorPlaywrightAgent& m_playwrightAgent;
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteAnimationTimeline.cpp b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteAnimationTimeline.cpp
index 7ef986965d3fda34b4f09279c62bdad40712ab12..5e0bc508f72bbbd0bcb4bb1254782028961867a9 100644
--- a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteAnimationTimeline.cpp
+++ b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteAnimationTimeline.cpp
@@ -30,6 +30,7 @@
 
 #import "RemoteAnimationUtilities.h"
 #import <wtf/TZoneMallocInlines.h>
+#import <wtf/MonotonicTime.h>
 
 namespace WebKit {
 
diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/mac/RemoteScrollingTreeMac.mm b/Source/WebKit/UIProcess/RemoteLayerTree/mac/RemoteScrollingTreeMac.mm
index 07e7aec9d5f53dd4adfb83b6626f469621362663..18d049adb49ab565f60e9e1dded55da1a6aaaf3a 100644
--- a/Source/WebKit/UIProcess/RemoteLayerTree/mac/RemoteScrollingTreeMac.mm
+++ b/Source/WebKit/UIProcess/RemoteLayerTree/mac/RemoteScrollingTreeMac.mm
@@ -46,6 +46,7 @@
 #import <pal/spi/cocoa/QuartzCoreSPI.h>
 #import <wtf/SetForScope.h>
 #import <wtf/TZoneMallocInlines.h>
+#import <wtf/SetForScope.h>
 #import <wtf/text/TextStream.h>
 
 namespace WebKit {
diff --git a/Source/WebKit/UIProcess/RemotePagePlaybackSessionManagerProxy.h b/Source/WebKit/UIProcess/RemotePagePlaybackSessionManagerProxy.h
index 3f6cd845733e2e8f5e25c318e7ab54f77032d4cf..e4399bfd734a28ef5df5ec855b7c78b46634c91d 100644
--- a/Source/WebKit/UIProcess/RemotePagePlaybackSessionManagerProxy.h
+++ b/Source/WebKit/UIProcess/RemotePagePlaybackSessionManagerProxy.h
@@ -28,11 +28,11 @@
 #if PLATFORM(IOS_FAMILY) || (PLATFORM(MAC) && ENABLE(VIDEO_PRESENTATION_MODE))
 
 #include "MessageReceiver.h"
+#include "PlaybackSessionManagerProxy.h"
 #include <WebCore/PageIdentifier.h>
 
 namespace WebKit {
 
-class PlaybackSessionManagerProxy;
 class WebProcessProxy;
 
 class RemotePagePlaybackSessionManagerProxy : public IPC::MessageReceiver, public RefCounted<RemotePagePlaybackSessionManagerProxy> {
diff --git a/Source/WebKit/UIProcess/RemotePageProxy.cpp b/Source/WebKit/UIProcess/RemotePageProxy.cpp
index f7a0ee83fa8ee37d1c6d927f167b6e6bb647d817..919494d9b459a94d17617a0b514552e21cd21a29 100644
--- a/Source/WebKit/UIProcess/RemotePageProxy.cpp
+++ b/Source/WebKit/UIProcess/RemotePageProxy.cpp
@@ -37,6 +37,7 @@
 #include "ProvisionalFrameProxy.h"
 #include "RemotePageDrawingAreaProxy.h"
 #include "RemotePageFullscreenManagerProxy.h"
+#include "RemotePagePlaybackSessionManagerProxy.h"
 #include "RemotePageScreenOrientationManagerProxy.h"
 #include "RemotePageVisitedLinkStoreRegistration.h"
 #include "RemotePageWebDeviceOrientationUpdateProviderProxy.h"
@@ -56,6 +57,7 @@
 #include <WebCore/RemoteUserInputEventData.h>
 #include <wtf/TZoneMallocInlines.h>
 
+
 #if ENABLE(FULLSCREEN_API)
 #include "WebFullScreenManagerProxy.h"
 #endif
diff --git a/Source/WebKit/UIProcess/TextExtractionAssertionScope.h b/Source/WebKit/UIProcess/TextExtractionAssertionScope.h
index 986c0812fedd2be938675ef5de41041e9fc76a0b..69da96c1e1ccb3b6d6b142ccb3b337f0bcb14957 100644
--- a/Source/WebKit/UIProcess/TextExtractionAssertionScope.h
+++ b/Source/WebKit/UIProcess/TextExtractionAssertionScope.h
@@ -25,13 +25,12 @@
 
 #pragma once
 
+#include "WebPageProxy.h"
 #include <wtf/FastMalloc.h>
 #include <wtf/WeakPtr.h>
 
 namespace WebKit {
 
-class WebPageProxy;
-
 class TextExtractionAssertionScope {
     WTF_MAKE_TZONE_ALLOCATED(TextExtractionAssertionScope);
     WTF_MAKE_NONCOPYABLE(TextExtractionAssertionScope);
diff --git a/Source/WebKit/UIProcess/WebContextMenuProxy.h b/Source/WebKit/UIProcess/WebContextMenuProxy.h
index 364666d82ffd69aef6cb4f8d63b61ae13e163d87..a491699c43502e6feae3b3df73b3558a79bb73e3 100644
--- a/Source/WebKit/UIProcess/WebContextMenuProxy.h
+++ b/Source/WebKit/UIProcess/WebContextMenuProxy.h
@@ -51,6 +51,7 @@ public:
     void deref() const final { RefCounted::deref(); }
 
     virtual void show();
+    virtual void hide() {}
 
     WebPageProxy* page() const { return m_page.get(); }
     const FrameInfoData& frameInfo() const LIFETIME_BOUND { return m_frameInfo; }
diff --git a/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.cpp b/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cc495bff7d10aeb071ba30002d292b82e26d51b7
--- /dev/null
+++ b/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.cpp
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebPageInspectorEmulationAgent.h"
+
+#include "APIPageConfiguration.h"
+#include "WebPageProxy.h"
+#include "WebPreferences.h"
+#include "PageClient.h"
+#include <JavaScriptCore/InspectorFrontendRouter.h>
+#include <WebCore/Credential.h>
+
+
+namespace WebKit {
+
+using namespace Inspector;
+
+WTF_MAKE_TZONE_ALLOCATED_IMPL(WebPageInspectorEmulationAgent);
+
+WebPageInspectorEmulationAgent::WebPageInspectorEmulationAgent(BackendDispatcher& backendDispatcher, WebPageProxy& page)
+    : InspectorAgentBase("Emulation"_s)
+    , m_backendDispatcher(EmulationBackendDispatcher::create(backendDispatcher, this))
+    , m_page(page)
+{
+}
+
+WebPageInspectorEmulationAgent::~WebPageInspectorEmulationAgent()
+{
+}
+
+void WebPageInspectorEmulationAgent::didCreateFrontendAndBackend()
+{
+}
+
+void WebPageInspectorEmulationAgent::willDestroyFrontendAndBackend(DisconnectReason)
+{
+   m_commandsToRunWhenShown.clear();
+}
+
+void WebPageInspectorEmulationAgent::setDeviceMetricsOverride(int width, int height, bool fixedlayout, std::optional<double>&& deviceScaleFactor, Ref<SetDeviceMetricsOverrideCallback>&& callback)
+{
+#if PLATFORM(GTK)
+    // On gtk, fixed layout doesn't work with compositing enabled
+    // FIXME: This turns off compositing forever, even if fixedLayout is disabled.
+    if (fixedlayout) {
+        auto copy = m_page.preferences().copy();
+        copy->setAcceleratedCompositingEnabled(false);
+        m_page.setPreferences(copy);
+    }
+#endif
+
+    if (deviceScaleFactor)
+        m_page.setCustomDeviceScaleFactor(deviceScaleFactor.value(), [] { });
+    m_page.setUseFixedLayout(fixedlayout);
+    if (!m_page.pageClient()->isActiveViewVisible() && m_page.configuration().relatedPage()) {
+        m_commandsToRunWhenShown.append([this, width, height, callback = WTF::move(callback)]() mutable {
+            setSize(width, height, WTF::move(callback));
+        });
+    } else {
+        setSize(width, height, WTF::move(callback));
+    }
+}
+
+void WebPageInspectorEmulationAgent::setSize(int width, int height, Ref<SetDeviceMetricsOverrideCallback>&& callback)
+{
+    platformSetSize(width, height, [callback = WTF::move(callback)](const String& error) {
+        if (error.isEmpty())
+            callback->sendSuccess();
+        else
+            callback->sendFailure(error);
+    });
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::setJavaScriptEnabled(bool enabled)
+{
+    auto copy = m_page.preferences().copy();
+    copy->setJavaScriptEnabled(enabled);
+    m_page.setPreferences(copy);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::setAuthCredentials(const String& username, const String& password, const String& origin)
+{
+    if (username.isNull() && password.isNull())
+        m_page.setAuthCredentialsForAutomation(std::nullopt, std::nullopt);
+    else
+        m_page.setAuthCredentialsForAutomation(WebCore::Credential(username, password, WebCore::CredentialPersistence::Permanent), URL(origin));
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::setActiveAndFocused(std::optional<bool>&& active)
+{
+    m_page.setActiveForAutomation(WTF::move(active));
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::grantPermissions(const String& origin, Ref<JSON::Array>&& values)
+{
+    HashSet<String> set;
+    for (const auto& value : values.get()) {
+        String name;
+        if (!value->asString(name))
+            return makeUnexpected("Permission must be a string"_s);
+
+        set.add(name);
+    }
+    m_permissions.set(origin, WTF::move(set));
+    m_page.setPermissionsForAutomation(m_permissions);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::resetPermissions()
+{
+    m_permissions.clear();
+    m_page.setPermissionsForAutomation(m_permissions);
+    return { };
+}
+
+Inspector::Protocol::ErrorStringOr<void> WebPageInspectorEmulationAgent::setOrientationOverride(std::optional<int>&& angle)
+{
+#if ENABLE(ORIENTATION_EVENTS)
+    m_page.setOrientationOverride(WTF::move(angle));
+    return { };
+#else
+    UNUSED_PARAM(angle);
+    return makeUnexpected("Orientation events are disabled in this build"_s);
+#endif
+}
+
+
+void WebPageInspectorEmulationAgent::didShowPage()
+{
+    for (auto& command : m_commandsToRunWhenShown)
+        command();
+    m_commandsToRunWhenShown.clear();
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.h b/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.h
new file mode 100644
index 0000000000000000000000000000000000000000..8c772fb1b67ec7d83cbe2394d8ab04787a4412a8
--- /dev/null
+++ b/Source/WebKit/UIProcess/WebPageInspectorEmulationAgent.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <JavaScriptCore/InspectorAgentBase.h>
+#include <JavaScriptCore/InspectorBackendDispatchers.h>
+
+#include <wtf/Forward.h>
+#include <wtf/Function.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/Vector.h>
+
+namespace Inspector {
+class BackendDispatcher;
+class FrontendChannel;
+class FrontendRouter;
+}
+
+namespace WebKit {
+
+class WebPageProxy;
+
+class WebPageInspectorEmulationAgent : public Inspector::InspectorAgentBase, public Inspector::EmulationBackendDispatcherHandler {
+    WTF_MAKE_NONCOPYABLE(WebPageInspectorEmulationAgent);
+    WTF_MAKE_TZONE_ALLOCATED(WebPageInspectorEmulationAgent);
+public:
+    WebPageInspectorEmulationAgent(Inspector::BackendDispatcher& backendDispatcher, WebPageProxy& page);
+    ~WebPageInspectorEmulationAgent() override;
+
+    void didCreateFrontendAndBackend() override;
+    void willDestroyFrontendAndBackend(Inspector::DisconnectReason) override;
+
+    void setDeviceMetricsOverride(int width, int height, bool fixedlayout, std::optional<double>&& deviceScaleFactor, Ref<SetDeviceMetricsOverrideCallback>&&) override;
+    Inspector::Protocol::ErrorStringOr<void> setJavaScriptEnabled(bool enabled) override;
+    Inspector::Protocol::ErrorStringOr<void> setAuthCredentials(const String&, const String&, const String&) override;
+    Inspector::Protocol::ErrorStringOr<void> setActiveAndFocused(std::optional<bool>&&) override;
+    Inspector::Protocol::ErrorStringOr<void> grantPermissions(const String& origin, Ref<JSON::Array>&& permissions) override;
+    Inspector::Protocol::ErrorStringOr<void> resetPermissions() override;
+    Inspector::Protocol::ErrorStringOr<void> setOrientationOverride(std::optional<int>&& angle) override;
+
+    void didShowPage();
+
+private:
+    void setSize(int width, int height, Ref<SetDeviceMetricsOverrideCallback>&& callback);
+    void platformSetSize(int width, int height, Function<void (const String& error)>&&);
+
+    Ref<Inspector::EmulationBackendDispatcher> m_backendDispatcher;
+    WebPageProxy& m_page;
+    Vector<Function<void()>> m_commandsToRunWhenShown;
+    UncheckedKeyHashMap<String, HashSet<String>> m_permissions;
+};
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/WebPageInspectorInputAgent.cpp b/Source/WebKit/UIProcess/WebPageInspectorInputAgent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a29ae94cda78928fab928bbdd250f8cd1c8b4cc5
--- /dev/null
+++ b/Source/WebKit/UIProcess/WebPageInspectorInputAgent.cpp
@@ -0,0 +1,397 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "MessageSenderInlines.h"
+#include "WebPageInspectorInputAgent.h"
+
+#include "NativeWebKeyboardEvent.h"
+#include "NativeWebMouseEvent.h"
+#include "NativeWebWheelEvent.h"
+#include "WebPageProxy.h"
+#include "WebProcessProxy.h"
+#include "WebTouchEvent.h"
+#include "WebWheelEvent.h"
+#include <wtf/MathExtras.h>
+#include <wtf/HexNumber.h>
+#include <WebCore/Scrollbar.h>
+
+#include "WebPageMessages.h"
+
+namespace WebKit {
+
+using namespace Inspector;
+
+WTF_MAKE_TZONE_ALLOCATED_IMPL(WebPageInspectorInputAgent);
+
+namespace {
+
+template<class T>
+class CallbackList {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(CallbackList);
+public:
+    ~CallbackList()
+    {
+        for (const auto& callback : m_callbacks)
+            callback->sendFailure("Page closed"_s);
+    }
+
+    void append(Ref<T>&& callback)
+    {
+        m_callbacks.append(WTF::move(callback));
+    }
+
+    void sendSuccess()
+    {
+        for (const auto& callback : m_callbacks)
+            callback->sendSuccess();
+        m_callbacks.clear();
+    }
+
+private:
+    Vector<Ref<T>> m_callbacks;
+};
+
+} // namespace
+
+class WebPageInspectorInputAgent::KeyboardCallbacks : public CallbackList<Inspector::InputBackendDispatcherHandler::DispatchKeyEventCallback> {
+};
+
+class WebPageInspectorInputAgent::MouseCallbacks : public CallbackList<Inspector::InputBackendDispatcherHandler::DispatchMouseEventCallback> {
+};
+
+class WebPageInspectorInputAgent::WheelCallbacks : public CallbackList<Inspector::InputBackendDispatcherHandler::DispatchWheelEventCallback> {
+};
+
+WebPageInspectorInputAgent::WebPageInspectorInputAgent(Inspector::BackendDispatcher& backendDispatcher, WebPageProxy& page)
+    : InspectorAgentBase("Input"_s)
+    , m_backendDispatcher(InputBackendDispatcher::create(backendDispatcher, this))
+    , m_page(page)
+{
+}
+
+WebPageInspectorInputAgent::~WebPageInspectorInputAgent() = default;
+
+void WebPageInspectorInputAgent::didProcessAllPendingKeyboardEvents()
+{
+    m_keyboardCallbacks->sendSuccess();
+}
+
+void WebPageInspectorInputAgent::didProcessAllPendingMouseEvents()
+{
+    m_page.setInterceptDrags(false);
+    m_mouseCallbacks->sendSuccess();
+}
+
+void WebPageInspectorInputAgent::didProcessAllPendingWheelEvents()
+{
+    m_wheelCallbacks->sendSuccess();
+}
+
+void WebPageInspectorInputAgent::didCreateFrontendAndBackend()
+{
+    m_keyboardCallbacks = makeUnique<KeyboardCallbacks>();
+    m_mouseCallbacks = makeUnique<MouseCallbacks>();
+    m_wheelCallbacks = makeUnique<WheelCallbacks>();
+}
+
+void WebPageInspectorInputAgent::willDestroyFrontendAndBackend(Inspector::DisconnectReason)
+{
+    m_keyboardCallbacks = nullptr;
+    m_mouseCallbacks = nullptr;
+    m_wheelCallbacks = nullptr;
+}
+
+static String keyIdentifierForKey(const String& key)
+{
+    if (key.length() == 1)
+        return makeString("U+"_s, hex(toASCIIUpper(key.codeUnitAt(0)), 4));
+    if (key == "Delete"_s)
+        return "U+007F"_s;
+    if (key == "Backspace"_s)
+        return "U+0008"_s;
+    if (key == "ArrowUp"_s)
+        return "Up"_s;
+    if (key == "ArrowDown"_s)
+        return "Down"_s;
+    if (key == "ArrowLeft"_s)
+        return "Left"_s;
+    if (key == "ArrowRight"_s)
+        return "Right"_s;
+    if (key == "Tab"_s)
+        return "U+0009"_s;
+    if (key == "Pause"_s)
+        return "Pause"_s;
+    if (key == "ScrollLock"_s)
+        return "Scroll"_s;
+    return key;
+}
+
+void WebPageInspectorInputAgent::dispatchKeyEvent(const String& type, std::optional<int>&& modifiers, const String& text, const String& unmodifiedText, const String& code, const String& key, std::optional<int>&& windowsVirtualKeyCode, std::optional<int>&& nativeVirtualKeyCode, std::optional<bool>&& autoRepeat, std::optional<bool>&& isKeypad, std::optional<bool>&& isSystemKey, RefPtr<JSON::Array>&& commands, Ref<Inspector::InputBackendDispatcherHandler::DispatchKeyEventCallback>&& callback)
+{
+    WebEventType eventType;
+    if (type == "keyDown"_s) {
+        eventType = WebEventType::KeyDown;
+    } else if (type == "keyUp"_s) {
+        eventType = WebEventType::KeyUp;
+    } else {
+        callback->sendFailure("Unsupported event type."_s);
+        return;
+    }
+    OptionSet<WebEventModifier> eventModifiers;
+    if (modifiers)
+        eventModifiers = eventModifiers.fromRaw(*modifiers);
+    int eventWindowsVirtualKeyCode = 0;
+    if (windowsVirtualKeyCode)
+        eventWindowsVirtualKeyCode = *windowsVirtualKeyCode;
+    int eventNativeVirtualKeyCode = 0;
+    if (nativeVirtualKeyCode)
+        eventNativeVirtualKeyCode = *nativeVirtualKeyCode;
+    Vector<String> eventCommands;
+    if (commands) {
+      for (const auto& value : *commands) {
+        String command;
+        if (!value->asString(command)) {
+          callback->sendFailure("Command must be string"_s);
+          return;
+        }
+        eventCommands.append(command);
+      }
+    }
+
+    String keyIdentifier = keyIdentifierForKey(key);
+
+    bool eventIsAutoRepeat = false;
+    if (autoRepeat)
+        eventIsAutoRepeat = *autoRepeat;
+    bool eventIsKeypad = false;
+    if (isKeypad)
+        eventIsKeypad = *isKeypad;
+    bool eventIsSystemKey = false;
+    if (isSystemKey)
+        eventIsSystemKey = *isSystemKey;
+    MonotonicTime timestamp = MonotonicTime::now();
+
+    // cancel any active drag on Escape
+    if (eventType == WebEventType::KeyDown && key == "Escape"_s && m_page.cancelDragIfNeeded()) {
+        callback->sendSuccess();
+        return;
+    }
+
+    m_keyboardCallbacks->append(WTF::move(callback));
+    platformDispatchKeyEvent(
+        eventType,
+        text,
+        unmodifiedText,
+        key,
+        code,
+        keyIdentifier,
+        eventWindowsVirtualKeyCode,
+        eventNativeVirtualKeyCode,
+        eventIsAutoRepeat,
+        eventIsKeypad,
+        eventIsSystemKey,
+        eventModifiers,
+        eventCommands,
+        timestamp);
+}
+
+void WebPageInspectorInputAgent::dispatchMouseEvent(const String& type, int x, int y, std::optional<int>&& modifiers, const String& button, std::optional<int>&& buttons, std::optional<int>&& clickCount, std::optional<int>&& deltaX, std::optional<int>&& deltaY, Ref<DispatchMouseEventCallback>&& callback)
+{
+    WebEventType eventType = WebEventType::MouseMove;
+    if (type == "down"_s)
+        eventType = WebEventType::MouseDown;
+    else if (type == "up"_s)
+        eventType = WebEventType::MouseUp;
+    else if (type == "move"_s)
+        eventType = WebEventType::MouseMove;
+    else {
+        callback->sendFailure("Unsupported event type"_s);
+        return;
+    }
+
+    OptionSet<WebEventModifier> eventModifiers;
+    if (modifiers)
+        eventModifiers = eventModifiers.fromRaw(*modifiers);
+
+    WebMouseEventButton eventButton = WebMouseEventButton::None;
+    if (!!button) {
+        if (button == "left"_s)
+            eventButton = WebMouseEventButton::Left;
+        else if (button == "middle"_s)
+            eventButton = WebMouseEventButton::Middle;
+        else if (button == "right"_s)
+            eventButton = WebMouseEventButton::Right;
+        else if (button == "none"_s)
+            eventButton = WebMouseEventButton::None;
+        else {
+            callback->sendFailure("Unsupported eventButton"_s);
+            return;
+        }
+    }
+
+    unsigned short eventButtons = 0;
+    if (buttons)
+        eventButtons = *buttons;
+
+    int eventClickCount = 0;
+    if (clickCount)
+        eventClickCount = *clickCount;
+    int eventDeltaX = 0;
+    if (deltaX)
+        eventDeltaX = *deltaX;
+    int eventDeltaY = 0;
+    if (deltaY)
+        eventDeltaY = *deltaY;
+    m_mouseCallbacks->append(WTF::move(callback));
+
+    // Convert css coordinates to view coordinates (dip).
+    double totalScale = m_page.pageScaleFactor() * m_page.viewScaleFactor() * m_page.pageZoomFactor();
+    x = clampToInteger(roundf(x * totalScale));
+    y = clampToInteger(roundf(y * totalScale));
+    eventDeltaX = clampToInteger(roundf(eventDeltaX * totalScale));
+    eventDeltaY = clampToInteger(roundf(eventDeltaY * totalScale));
+
+    // We intercept any drags generated by this mouse event
+    // to prevent them from creating actual drags in the host
+    // operating system. This is turned off in the callback.
+    m_page.setInterceptDrags(true);
+#if PLATFORM(MAC)
+    UNUSED_VARIABLE(eventType);
+    UNUSED_VARIABLE(eventButton);
+    UNUSED_VARIABLE(eventClickCount);
+    platformDispatchMouseEvent(type, x, y, WTF::move(modifiers), button, WTF::move(clickCount), eventButtons);
+#elif PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN)
+    MonotonicTime timestamp = MonotonicTime::now();
+    NativeWebMouseEvent event(
+        eventType,
+        eventButton,
+        eventButtons,
+        {x, y},
+        WebCore::IntPoint(),
+        eventDeltaX,
+        eventDeltaY,
+        0,
+        eventClickCount,
+        eventModifiers,
+        timestamp);
+    m_page.handleMouseEvent(event);
+#endif
+}
+
+void WebPageInspectorInputAgent::dispatchTapEvent(int x, int y, std::optional<int>&& modifiers, Ref<DispatchTapEventCallback>&& callback)
+{
+    m_page.legacyMainFrameProcess().sendWithAsyncReply(Messages::WebPage::FakeTouchTap(WebCore::IntPoint(x, y), modifiers ? *modifiers : 0), [callback]() {
+        callback->sendSuccess();
+    }, m_page.webPageIDInMainFrameProcess());
+}
+
+void WebPageInspectorInputAgent::dispatchTouchEvent(const String& type, std::optional<int>&& modifiers, RefPtr<JSON::Array>&& in_touchPoints, Ref<DispatchTouchEventCallback>&& callback)
+{
+    float rotationAngle = 0.0;
+    float force = 1.0;
+    const WebCore::DoubleSize radius(1, 1);
+
+    uint8_t unsignedModifiers = modifiers ? static_cast<uint8_t>(*modifiers) : 0;
+    OptionSet<WebEventModifier> eventModifiers;
+    eventModifiers = eventModifiers.fromRaw(unsignedModifiers);
+
+    WebPlatformTouchPoint::State state;
+    if (type == "touchStart"_s)
+        state = WebPlatformTouchPoint::State::Pressed;
+    else if (type == "touchMove"_s)
+        state = WebPlatformTouchPoint::State::Moved;
+    else if (type == "touchEnd"_s)
+        state = WebPlatformTouchPoint::State::Released;
+    else if (type == "touchCancel"_s)
+        state = WebPlatformTouchPoint::State::Cancelled;
+    else {
+        callback->sendFailure("Unsupported event type"_s);
+        return;
+    }
+
+    Vector<WebPlatformTouchPoint> touchPoints;
+    for (unsigned i = 0; i < in_touchPoints->length(); ++i) {
+        RefPtr<JSON::Value> item = in_touchPoints->get(i);
+        RefPtr<JSON::Object> obj = item->asObject();
+        if (!obj) {
+            callback->sendFailure("Invalid TouchPoint format"_s);
+            return;
+        }
+        std::optional<int> x = obj->getInteger("x"_s);
+        if (!x) {
+            callback->sendFailure("TouchPoint does not have x"_s);
+            return;
+        }
+        std::optional<int> y = obj->getInteger("y"_s);
+        if (!y) {
+            callback->sendFailure("TouchPoint does not have y"_s);
+            return;
+        }
+        std::optional<int> optionalId = obj->getInteger("id"_s);
+        int id = optionalId ? *optionalId : 0;
+        const WebCore::IntPoint position(*x, *y);
+        touchPoints.append(WebPlatformTouchPoint(id, state, position, position, radius, rotationAngle, force));
+    }
+
+    WebTouchEvent touchEvent({WebEventType::TouchStart, eventModifiers, MonotonicTime::now()}, WTF::move(touchPoints), {}, {});
+    m_page.legacyMainFrameProcess().sendWithAsyncReply(Messages::WebPage::TouchEvent(touchEvent), [callback] (std::optional<WebEventType> eventType, bool) {
+        if (!eventType) {
+            callback->sendFailure("Failed to dispatch touch event."_s);
+            return;
+        }
+        callback->sendSuccess();
+    }, m_page.webPageIDInMainFrameProcess());
+}
+
+void WebPageInspectorInputAgent::dispatchWheelEvent(int x, int y, std::optional<int>&& modifiers, std::optional<int>&& deltaX, std::optional<int>&& deltaY, Ref<DispatchWheelEventCallback>&& callback)
+{
+    OptionSet<WebEventModifier> eventModifiers;
+    if (modifiers)
+        eventModifiers = eventModifiers.fromRaw(*modifiers);
+
+    float eventDeltaX = 0.0f;
+    if (deltaX)
+        eventDeltaX = *deltaX;
+    float eventDeltaY = 0.0f;
+    if (deltaY)
+        eventDeltaY = *deltaY;
+    m_wheelCallbacks->append(WTF::move(callback));
+
+    // Convert css coordinates to view coordinates (dip).
+    double totalScale = m_page.pageScaleFactor() * m_page.viewScaleFactor() * m_page.pageZoomFactor();
+    x = clampToInteger(roundf(x * totalScale));
+    y = clampToInteger(roundf(y * totalScale));
+
+    MonotonicTime timestamp = MonotonicTime::now();
+    WebCore::FloatSize delta = {-eventDeltaX, -eventDeltaY};
+    WebCore::FloatSize wheelTicks = delta;
+    wheelTicks.scale(1.0f / WebCore::Scrollbar::pixelsPerLineStep());
+    WebWheelEvent webEvent({WebEventType::Wheel, eventModifiers, timestamp}, {x, y}, {x, y}, delta, wheelTicks, WebWheelEvent::Granularity::ScrollByPixelWheelEvent);
+    NativeWebWheelEvent event(webEvent);
+    m_page.handleNativeWheelEvent(event);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/WebPageInspectorInputAgent.h b/Source/WebKit/UIProcess/WebPageInspectorInputAgent.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb0cd51d362dfd8af2370f43ecb8835c96450f21
--- /dev/null
+++ b/Source/WebKit/UIProcess/WebPageInspectorInputAgent.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "WebEvent.h"
+#include "WebKeyboardEvent.h"
+#include "WebMouseEvent.h"
+#include <JavaScriptCore/InspectorAgentBase.h>
+#include <JavaScriptCore/InspectorBackendDispatchers.h>
+#include <wtf/Forward.h>
+#include <wtf/Noncopyable.h>
+
+namespace Inspector {
+class BackendDispatcher;
+class FrontendChannel;
+class FrontendRouter;
+}
+
+namespace WebKit {
+
+class NativeWebKeyboardEvent;
+class WebPageProxy;
+
+class WebPageInspectorInputAgent : public Inspector::InspectorAgentBase, public Inspector::InputBackendDispatcherHandler {
+    WTF_MAKE_NONCOPYABLE(WebPageInspectorInputAgent);
+    WTF_MAKE_TZONE_ALLOCATED(WebPageInspectorInputAgent);
+public:
+    WebPageInspectorInputAgent(Inspector::BackendDispatcher& backendDispatcher, WebPageProxy& page);
+    ~WebPageInspectorInputAgent() override;
+
+    void didProcessAllPendingKeyboardEvents();
+    void didProcessAllPendingMouseEvents();
+    void didProcessAllPendingWheelEvents();
+
+    void didCreateFrontendAndBackend() override;
+    void willDestroyFrontendAndBackend(Inspector::DisconnectReason) override;
+
+    // Protocol handler
+    void dispatchKeyEvent(const String& type, std::optional<int>&& modifiers, const String& text, const String& unmodifiedText, const String& code, const String& key, std::optional<int>&& windowsVirtualKeyCode, std::optional<int>&& nativeVirtualKeyCode, std::optional<bool>&& autoRepeat, std::optional<bool>&& isKeypad, std::optional<bool>&& isSystemKey, RefPtr<JSON::Array>&&, Ref<DispatchKeyEventCallback>&& callback) override;
+    void dispatchMouseEvent(const String& type, int x, int y, std::optional<int>&& modifiers, const String& button, std::optional<int>&& buttons, std::optional<int>&& clickCount, std::optional<int>&& deltaX, std::optional<int>&& deltaY, Ref<DispatchMouseEventCallback>&& callback) override;
+    void dispatchTapEvent(int x, int y, std::optional<int>&& modifiers, Ref<DispatchTapEventCallback>&& callback) override;
+    void dispatchTouchEvent(const String& type, std::optional<int>&& modifiers, RefPtr<JSON::Array>&& touchPoints, Ref<DispatchTouchEventCallback>&& callback) override;
+    void dispatchWheelEvent(int x, int y, std::optional<int>&& modifiers, std::optional<int>&& deltaX, std::optional<int>&& deltaY, Ref<DispatchWheelEventCallback>&& callback) override;
+
+private:
+    void platformDispatchKeyEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, Vector<String>& commands, MonotonicTime timestamp);
+#if PLATFORM(MAC)
+    void platformDispatchMouseEvent(const String& type, int x, int y, std::optional<int>&& modifier, const String& button, std::optional<int>&& clickCount, unsigned short buttons);
+#endif
+
+    Ref<Inspector::InputBackendDispatcher> m_backendDispatcher;
+    WebPageProxy& m_page;
+    // Keep track of currently active modifiers across multiple keystrokes.
+    // Most platforms do not track current modifiers from synthesized events.
+    unsigned m_currentModifiers { 0 };
+    class KeyboardCallbacks;
+    std::unique_ptr<KeyboardCallbacks> m_keyboardCallbacks;
+    class MouseCallbacks;
+    std::unique_ptr<MouseCallbacks> m_mouseCallbacks;
+    class WheelCallbacks;
+    std::unique_ptr<WheelCallbacks> m_wheelCallbacks;
+};
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/WebPageProxy.cpp b/Source/WebKit/UIProcess/WebPageProxy.cpp
index b51fd21469a35bea05d91465215e463dd9be078d..87789a4c6edfd8b48bcb3f083cc8b4edb3c5a498 100644
--- a/Source/WebKit/UIProcess/WebPageProxy.cpp
+++ b/Source/WebKit/UIProcess/WebPageProxy.cpp
@@ -219,6 +219,7 @@
 #include <WebCore/CaptureDeviceManager.h>
 #include <WebCore/CaptureDeviceWithCapabilities.h>
 #include <WebCore/ChromeClient.h>
+#include <WebCore/Color.h>
 #include <WebCore/CompositionHighlight.h>
 #include <WebCore/CrossSiteNavigationDataTransfer.h>
 #include <WebCore/CryptoKey.h>
@@ -232,6 +233,7 @@
 #include <WebCore/DigitalCredentialsProtocols.h>
 #include <WebCore/DigitalCredentialsRequestData.h>
 #include <WebCore/DigitalCredentialsResponseData.h>
+#include <WebCore/DiagnosticLoggingResultType.h>
 #include <WebCore/DragController.h>
 #include <WebCore/DragData.h>
 #include <WebCore/DragEventTargetData.h>
@@ -260,6 +262,7 @@
 #include <WebCore/ModalContainerTypes.h>
 #include <WebCore/NotImplemented.h>
 #include <WebCore/OrganizationStorageAccessPromptQuirk.h>
+#include <WebCore/PageIdentifier.h>
 #include <WebCore/PerformanceLoggingClient.h>
 #include <WebCore/PermissionDescriptor.h>
 #include <WebCore/PermissionState.h>
@@ -269,10 +272,12 @@
 #include <WebCore/Quirks.h>
 #include <WebCore/RealtimeMediaSourceCenter.h>
 #include <WebCore/ReferrerPolicy.h>
+#include <WebCore/RegistrableDomain.h>
 #include <WebCore/RemoteUserInputEventData.h>
 #include <WebCore/RenderEmbeddedObject.h>
 #include <WebCore/ResourceLoadStatistics.h>
 #include <WebCore/RunJavaScriptParameters.h>
+#include <WebCore/ScreenOrientationType.h>
 #include <WebCore/SecurityOrigin.h>
 #include <WebCore/SecurityOriginData.h>
 #include <WebCore/SerializedCryptoKeyWrap.h>
@@ -366,7 +371,7 @@
 #include "ViewSnapshotStore.h"
 #endif
 
-#if PLATFORM(GTK)
+#if PLATFORM(GTK) || PLATFORM(WPE)
 #include <WebCore/SelectionData.h>
 #endif
 
@@ -496,6 +501,17 @@ static constexpr Seconds tryCloseTimeoutDelay = 50_ms;
 static constexpr Seconds audibleActivityClearDelay = 10_s;
 #endif
 
+static WebCore::ScreenOrientationType toScreenOrientationType(int angle)
+{
+    if (angle == -90)
+        return WebCore::ScreenOrientationType::LandscapeSecondary;
+    if (angle == 180)
+        return WebCore::ScreenOrientationType::PortraitSecondary;
+    if (angle == 90)
+        return WebCore::ScreenOrientationType::LandscapePrimary;
+    return WebCore::ScreenOrientationType::PortraitPrimary;
+}
+
 #if PLATFORM(COCOA)
 static WorkQueue& sharedFileQueueSingleton()
 {
@@ -1105,6 +1121,10 @@ WebPageProxy::~WebPageProxy()
 
     ASSERT(webPageProxyMap().get(m_identifier) == this);
     webPageProxyMap().remove(m_identifier);
+
+#if PLATFORM(COCOA)
+    releaseInspectorDragPasteboard();
+#endif
 }
 
 void WebPageProxy::addAllMessageReceivers()
@@ -1678,7 +1698,7 @@ void WebPageProxy::didAttachToRunningProcess()
 
 #if ENABLE(FULLSCREEN_API)
     ASSERT(!m_fullScreenManager);
-    m_fullScreenManager = WebFullScreenManagerProxy::create(*this, protect(protect(pageClient())->fullScreenManagerProxyClient()).get());
+    m_fullScreenManager = WebFullScreenManagerProxy::create(*this, m_fullScreenManagerClientOverride ? *m_fullScreenManagerClientOverride : protect(protect(pageClient())->fullScreenManagerProxyClient()).get());
 #endif
 #if ENABLE(VIDEO_PRESENTATION_MODE)
     ASSERT(!m_playbackSessionManager);
@@ -1710,7 +1730,7 @@ void WebPageProxy::didAttachToRunningProcess()
 #endif
 
 #if !PLATFORM(IOS_FAMILY)
-    auto currentOrientation = WebCore::naturalScreenOrientationType();
+    auto currentOrientation = m_deviceOrientationOverride ? toScreenOrientationType(*m_deviceOrientationOverride) : WebCore::naturalScreenOrientationType();
 #else
     auto currentOrientation = toScreenOrientationType(m_deviceOrientation);
 #endif
@@ -1850,6 +1870,7 @@ void WebPageProxy::initializeWebPage(const Site& site, WebCore::SandboxFlags eff
     if (preferences->siteIsolationEnabled())
         browsingContextGroup->addPage(*this);
     process->send(Messages::WebProcess::CreateWebPage(m_webPageID, creationParameters(process, *protect(drawingArea()), m_mainFrame->frameID(), std::nullopt)), 0);
+    m_inspectorController->didInitializeWebPage();
 
 #if ENABLE(WINDOW_PROXY_PROPERTY_ACCESS_NOTIFICATION)
     internals().frameLoadStateObserver = WebPageProxyFrameLoadStateObserver::create();
@@ -2171,6 +2192,21 @@ WebProcessProxy& WebPageProxy::ensureRunningProcess()
     return m_legacyMainFrameProcess;
 }
 
+RefPtr<API::Navigation> WebPageProxy::loadRequestForInspector(WebCore::ResourceRequest&& request, WebFrameProxy* frame)
+{
+    if (!frame || frame == mainFrame())
+        return loadRequest(WTF::move(request), WebCore::ShouldOpenExternalURLsPolicy::ShouldNotAllow);
+
+    auto navigation = m_navigationState->createLoadRequestNavigation(legacyMainFrameProcess().coreProcessIdentifier(), ResourceRequest(request), m_backForwardList->currentItem());
+    LoadParameters loadParameters;
+    loadParameters.navigationID = navigation->navigationID();
+    loadParameters.request = WTF::move(request);
+    loadParameters.shouldOpenExternalURLsPolicy = WebCore::ShouldOpenExternalURLsPolicy::ShouldNotAllow;
+    loadParameters.shouldTreatAsContinuingLoad = ShouldTreatAsContinuingLoad::No;
+    m_legacyMainFrameProcess->send(Messages::WebPage::LoadRequestInFrameForInspector(WTF::move(loadParameters), frame->frameID()), m_webPageID);
+    return navigation;
+}
+
 RefPtr<API::Navigation> WebPageProxy::loadRequest(WebCore::ResourceRequest&& request, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, NavigationUpgradeToHTTPSBehavior navigationUpgradeToHTTPSBehavior, std::unique_ptr<NavigationActionData>&& lastNavigationAction, API::Object* userData, bool isRequestFromClientOrUserInput)
 {
     if (m_isClosed)
@@ -2296,11 +2332,29 @@ void WebPageProxy::loadRequestWithNavigationShared(Ref<WebProcessProxy>&& proces
 
         navigation->setIsLoadedWithNavigationShared(true);
         protectedProcess->markProcessAsRecentlyUsed();
-        if (!protectedProcess->isLaunching() || !url.protocolIsFile())
-            protectedProcess->send(Messages::WebPage::LoadRequest(WTF::move(loadParameters)), webPageID);
+
+        // Pause loading for new window navigation.
+        Function<void()> continuation = [
+            weakThis = WeakPtr { protectedThis },
+            weakProcess = WeakPtr { protectedProcess },
+            loadParameters = WTF::move(loadParameters),
+            webPageID,
+            url
+        ]() mutable {
+            RefPtr innerProtectedProcess = weakProcess.get();
+            RefPtr innerProtectedThis = weakThis.get();
+            if (!innerProtectedProcess || !innerProtectedThis)
+                return;
+            if (!innerProtectedProcess->isLaunching() || !url.protocolIsFile())
+                innerProtectedProcess->send(Messages::WebPage::LoadRequest(WTF::move(loadParameters)), webPageID);
+            else
+                innerProtectedProcess->send(Messages::WebPage::LoadRequestWaitingForProcessLaunch(WTF::move(loadParameters), innerProtectedThis->internals().pageLoadState.resourceDirectoryURL(), innerProtectedThis->identifier(), true), webPageID);
+            innerProtectedProcess->startResponsivenessTimer();
+        };
+        if (protectedThis->m_inspectorController->shouldPauseLoadRequest())
+            protectedThis->m_inspectorController->setContinueLoadingCallback(WTF::move(continuation));
         else
-            protectedProcess->send(Messages::WebPage::LoadRequestWaitingForProcessLaunch(WTF::move(loadParameters), protectedThis->pageLoadState().resourceDirectoryURL(), protectedThis->identifier(), true), webPageID);
-        protectedProcess->startResponsivenessTimer();
+            continuation();
     });
 }
 
@@ -2896,6 +2950,53 @@ RefPtr<WebAutomationSession> WebPageProxy::activeAutomationSession() const
     return m_configuration->processPool().automationSession();
 }
 
+void WebPageProxy::setAuthCredentialsForAutomation(std::optional<WebCore::Credential>&& credentials, std::optional<URL>&& origin)
+{
+    m_credentialsForAutomation = WTF::move(credentials);
+    m_authOriginForAutomation = WTF::move(origin);
+}
+
+void WebPageProxy::setPermissionsForAutomation(const UncheckedKeyHashMap<String, HashSet<String>>& permissions)
+{
+    m_permissionsForAutomation = permissions;
+}
+
+void WebPageProxy::setOrientationOverride(std::optional<int>&& angle)
+{
+    m_deviceOrientationOverride = WTF::move(angle);
+    auto deviceOrientation = toScreenOrientationType(m_deviceOrientationOverride.value_or(0));
+    if (m_screenOrientationManager)
+        m_screenOrientationManager->setCurrentOrientation(deviceOrientation);
+    m_legacyMainFrameProcess->send(Messages::WebPage::SetDeviceOrientation(m_deviceOrientationOverride.value_or(0)), webPageIDInMainFrameProcess());
+}
+
+std::optional<bool> WebPageProxy::permissionForAutomation(const String& origin, const String& permission) const
+{
+    auto permissions = m_permissionsForAutomation.find(origin);
+    if (permissions == m_permissionsForAutomation.end())
+        permissions = m_permissionsForAutomation.find("*"_s);
+    if (permissions == m_permissionsForAutomation.end())
+        return std::nullopt;
+    return permissions->value.contains(permission);
+}
+
+void WebPageProxy::setActiveForAutomation(std::optional<bool> active) {
+    m_activeForAutomation = active;
+    OptionSet<ActivityState> state;
+    state.add(ActivityState::IsFocused);
+    state.add(ActivityState::WindowIsActive);
+    state.add(ActivityState::IsVisible);
+    state.add(ActivityState::IsVisibleOrOccluded);
+    activityStateDidChange(state);
+}
+
+void WebPageProxy::logToStderr(const String& str)
+{
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
+    fprintf(stderr, "RENDERER: %s\n", str.utf8().data());
+WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
+}
+
 void WebPageProxy::sendMessageToInspectorFrontend(const String& targetId, const String& message)
 {
     m_inspectorController->sendMessageToInspectorFrontend(targetId, message);
@@ -3199,6 +3300,24 @@ void WebPageProxy::updateActivityState(OptionSet<ActivityState> flagsToUpdate)
     bool wasVisible = isViewVisible();
     RefPtr pageClient = this->pageClient();
     internals().activityState.remove(flagsToUpdate);
+
+    if (m_activeForAutomation) {
+        if (*m_activeForAutomation) {
+            if (flagsToUpdate & ActivityState::IsFocused)
+                internals().activityState.add(ActivityState::IsFocused);
+            if (flagsToUpdate & ActivityState::WindowIsActive)
+                internals().activityState.add(ActivityState::WindowIsActive);
+            if (flagsToUpdate & ActivityState::IsVisible)
+                internals().activityState.add(ActivityState::IsVisible);
+            if (flagsToUpdate & ActivityState::IsVisibleOrOccluded)
+                internals().activityState.add(ActivityState::IsVisibleOrOccluded);
+        }
+        flagsToUpdate.remove(ActivityState::IsFocused);
+        flagsToUpdate.remove(ActivityState::WindowIsActive);
+        flagsToUpdate.remove(ActivityState::IsVisible);
+        flagsToUpdate.remove(ActivityState::IsVisibleOrOccluded);
+    }
+
     if (flagsToUpdate & ActivityState::IsFocused && pageClient->isViewFocused())
         internals().activityState.add(ActivityState::IsFocused);
     if (flagsToUpdate & ActivityState::WindowIsActive && pageClient->isViewWindowActive())
@@ -3988,7 +4107,7 @@ void WebPageProxy::performDragOperation(DragData& dragData, const String& dragSt
     if (!hasRunningProcess())
         return;
 
-#if PLATFORM(GTK)
+#if PLATFORM(GTK) || PLATFORM(WPE)
     URL url { dragData.asURL() };
     if (url.protocolIsFile())
         protect(legacyMainFrameProcess())->assumeReadAccessToBaseURL(*this, url.string(), [] { });
@@ -4031,6 +4150,8 @@ void WebPageProxy::performDragControllerAction(DragControllerAction action, Drag
     if (!hasRunningProcess())
         return;
 
+    m_dragEventsQueued++;
+
     auto completionHandler = [this, protectedThis = Ref { *this }, action, dragData] (std::optional<WebCore::DragOperation> dragOperation, WebCore::DragHandlingMethod dragHandlingMethod, bool mouseIsOverFileInput, unsigned numberOfItemsToBeAccepted, const IntRect& insertionRect, const IntRect& editableElementRect, std::optional<WebCore::RemoteUserInputEventData> remoteUserInputEventData) mutable {
         if (!m_pageClient)
             return;
@@ -4042,7 +4163,7 @@ void WebPageProxy::performDragControllerAction(DragControllerAction action, Drag
         dragData.setClientPosition(roundedIntPoint(remoteUserInputEventData->transformedPoint));
         performDragControllerAction(action, dragData, remoteUserInputEventData->targetFrameID);
     };
-#if PLATFORM(GTK)
+#if PLATFORM(GTK) || PLATFORM(WPE)
     ASSERT(dragData.platformData());
     sendWithAsyncReplyToProcessContainingFrame(frameID, Messages::WebPage::PerformDragControllerAction(action, dragData.clientPosition(), dragData.globalPosition(), dragData.draggingSourceOperationMask(), *dragData.platformData(), dragData.flags()), WTF::move(completionHandler));
 #else
@@ -4077,17 +4198,36 @@ void WebPageProxy::didPerformDragControllerAction(std::optional<WebCore::DragOpe
     setDragCaretRect(insertionRect);
     if (RefPtr pageClient = this->pageClient())
         pageClient->didPerformDragControllerAction();
+    m_dragEventsQueued--;
+    if (m_dragEventsQueued == 0 && internals().mouseEventQueue.isEmpty())
+        m_inspectorController->didProcessAllPendingMouseEvents();
 }
 
 #if PLATFORM(GTK) || PLATFORM(WPE)
 void WebPageProxy::startDrag(SelectionData&& selectionData, OptionSet<WebCore::DragOperation> dragOperationMask, std::optional<ShareableBitmap::Handle>&& dragImageHandle, IntPoint&& dragImageHotspot)
 {
+    if (m_interceptDrags) {
+        m_dragSelectionData = WTF::move(selectionData);
+        m_dragSourceOperationMask = dragOperationMask;
+    } else {
 #if PLATFORM(GTK)
-    if (RefPtr pageClient = this->pageClient()) {
-        RefPtr dragImage = dragImageHandle ? ShareableBitmap::create(WTF::move(*dragImageHandle)) : nullptr;
-        pageClient->startDrag(WTF::move(selectionData), dragOperationMask, WTF::move(dragImage), WTF::move(dragImageHotspot));
+        if (RefPtr pageClient = this->pageClient()) {
+            RefPtr dragImage = dragImageHandle ? ShareableBitmap::create(WTF::move(*dragImageHandle)) : nullptr;
+            pageClient->startDrag(WTF::move(selectionData), dragOperationMask, WTF::move(dragImage), WTF::move(dragImageHotspot));
+        }
+#endif
     }
+    didStartDrag();
+}
 #endif
+
+#if PLATFORM(WIN) && ENABLE(DRAG_SUPPORT)
+void WebPageProxy::startDrag(WebCore::DragDataMap&& dragDataMap)
+{
+    if (m_interceptDrags) {
+        m_dragSelectionData = WTF::move(dragDataMap);
+        m_dragSourceOperationMask = WebCore::anyDragOperation();
+    }
     didStartDrag();
 }
 #endif
@@ -4108,6 +4248,24 @@ void WebPageProxy::dragEnded(const IntPoint& clientPosition, const IntPoint& glo
     setDragCaretRect({ });
 }
 
+bool WebPageProxy::cancelDragIfNeeded() {
+    if (!m_dragSelectionData)
+        return false;
+    m_dragSelectionData = std::nullopt;
+#if PLATFORM(COCOA)
+    releaseInspectorDragPasteboard();
+#endif
+
+    dragEnded(m_lastMousePositionForDrag, IntPoint(), m_dragSourceOperationMask);
+    return true;
+}
+
+#if !PLATFORM(COCOA)
+void WebPageProxy::setInterceptDrags(bool shouldIntercept) {
+    m_interceptDrags = shouldIntercept;
+}
+#endif
+
 void WebPageProxy::didStartDrag(const std::optional<FrameIdentifier>& targetFrameID)
 {
     if (!hasRunningProcess())
@@ -4116,6 +4274,25 @@ void WebPageProxy::didStartDrag(const std::optional<FrameIdentifier>& targetFram
     discardQueuedMouseEvents();
 
     sendToProcessContainingFrame(targetFrameID, Messages::WebPage::DidStartDrag(targetFrameID));
+    if (m_interceptDrags) {
+        {
+#if PLATFORM(WIN) || PLATFORM(COCOA)
+            DragData dragData(*m_dragSelectionData, m_lastMousePositionForDrag, WebCore::IntPoint(), m_dragSourceOperationMask);
+#else
+            DragData dragData(&*m_dragSelectionData, m_lastMousePositionForDrag, WebCore::IntPoint(), m_dragSourceOperationMask);
+#endif
+            dragEntered(dragData);
+        }
+
+        {
+#if PLATFORM(WIN) || PLATFORM(COCOA)
+            DragData dragData(*m_dragSelectionData, m_lastMousePositionForDrag, WebCore::IntPoint(), m_dragSourceOperationMask);
+#else
+            DragData dragData(&*m_dragSelectionData, m_lastMousePositionForDrag, WebCore::IntPoint(), m_dragSourceOperationMask);
+#endif
+            dragUpdated(dragData);
+        }
+    }
 }
 
 void WebPageProxy::dragCancelled()
@@ -4300,26 +4477,47 @@ void WebPageProxy::processNextQueuedMouseEvent()
     auto eventType = event->type();
     startResponsivenessTimerForMouseEvent(*targetFrame, eventType);
 
-    std::optional<Vector<SandboxExtension::Handle>> sandboxExtensions;
+    m_lastMousePositionForDrag = roundedIntPoint(event->position());
+    if (!m_dragSelectionData) {
+        std::optional<Vector<SandboxExtension::Handle>> sandboxExtensions;
 
 #if PLATFORM(MAC)
-    bool eventMayStartDrag = !m_currentDragOperation && eventType == WebEventType::MouseMove && event->button() != WebMouseEventButton::None;
-    if (eventMayStartDrag)
-        sandboxExtensions = SandboxExtension::createHandlesForMachLookup({ "com.apple.iconservices"_s, "com.apple.iconservices.store"_s }, process->auditToken(), SandboxExtension::MachBootstrapOptions::EnableMachBootstrap);
+        bool eventMayStartDrag = !m_currentDragOperation && eventType == WebEventType::MouseMove && event->button() != WebMouseEventButton::None;
+        if (eventMayStartDrag)
+            sandboxExtensions = SandboxExtension::createHandlesForMachLookup({ "com.apple.iconservices"_s, "com.apple.iconservices.store"_s }, process->auditToken(), SandboxExtension::MachBootstrapOptions::EnableMachBootstrap);
 #endif
 
-    auto eventWithCoalescedEvents = event;
+        auto eventWithCoalescedEvents = event;
 
-    if (event->type() == WebEventType::MouseMove) {
-        internals().coalescedMouseEvents.append(event);
-        eventWithCoalescedEvents->setCoalescedEvents(internals().coalescedMouseEvents);
-    }
+        if (event->type() == WebEventType::MouseMove) {
+            internals().coalescedMouseEvents.append(event);
+            eventWithCoalescedEvents->setCoalescedEvents(internals().coalescedMouseEvents);
+        }
 
-    LOG_WITH_STREAM(MouseHandling, stream << "UIProcess: sent mouse event " << eventType << " (queue size " << internals().mouseEventQueue.size() << ", coalesced events size " << internals().coalescedMouseEvents.size() << ")");
+        LOG_WITH_STREAM(MouseHandling, stream << "UIProcess: sent mouse event " << eventType << " (queue size " << internals().mouseEventQueue.size() << ", coalesced events size " << internals().coalescedMouseEvents.size() << ")");
 
-    sendMouseEvent(targetFrame->frameID(), eventWithCoalescedEvents, WTF::move(sandboxExtensions));
+        sendMouseEvent(m_mainFrame->frameID(), eventWithCoalescedEvents, WTF::move(sandboxExtensions));
 
-    internals().coalescedMouseEvents.clear();
+        internals().coalescedMouseEvents.clear();
+    } else {
+#if PLATFORM(WIN) || PLATFORM(COCOA)
+        DragData dragData(*m_dragSelectionData, roundedIntPoint(event->position()), roundedIntPoint(event->globalPosition()), m_dragSourceOperationMask);
+#else
+        DragData dragData(&*m_dragSelectionData, roundedIntPoint(event->position()), roundedIntPoint(event->globalPosition()), m_dragSourceOperationMask);
+#endif
+        if (eventType == WebEventType::MouseMove) {
+            dragUpdated(dragData);
+        } else if (eventType == WebEventType::MouseUp) {
+            if (m_currentDragOperation && m_dragSourceOperationMask.containsAny(m_currentDragOperation.value())) {
+                SandboxExtension::Handle sandboxExtensionHandle;
+                Vector<SandboxExtension::Handle> sandboxExtensionsForUpload;
+                performDragOperation(dragData, ""_s, WTF::move(sandboxExtensionHandle), WTF::move(sandboxExtensionsForUpload));
+            }
+            m_dragSelectionData = std::nullopt;
+            dragEnded(roundedIntPoint(event->position()), roundedIntPoint(event->globalPosition()), m_dragSourceOperationMask);
+        }
+        didReceiveEventIPC(process->connection(), eventType, true, std::nullopt);
+    }
 }
 
 #if ENABLE(MAC_GESTURE_EVENTS)
@@ -4586,6 +4784,8 @@ void WebPageProxy::wheelEventHandlingCompleted(bool wasHandled)
 
     if (RefPtr automationSession = m_configuration->processPool().automationSession())
         automationSession->wheelEventsFlushedForPage(*this);
+
+    m_inspectorController->didProcessAllPendingWheelEvents();
 }
 
 void WebPageProxy::cacheWheelEventScrollingAccelerationCurve(const NativeWebWheelEvent& nativeWheelEvent)
@@ -4729,7 +4929,7 @@ static TrackingType mergeTrackingTypes(TrackingType a, TrackingType b)
 
 void WebPageProxy::updateTouchEventTracking(const WebTouchEvent& touchStartEvent)
 {
-#if PLATFORM(COCOA)
+#if PLATFORM(IOS_FAMILY)
     for (auto& touchPoint : touchStartEvent.touchPoints()) {
         auto location = touchPoint.locationInRootView();
         auto update = [this, location](TrackingType& trackingType, EventTrackingRegions::EventType eventType) {
@@ -5571,6 +5771,7 @@ Ref<WebPageProxy> WebPageProxy::navigationOriginatingPage(const FrameInfoData& f
 
 void WebPageProxy::receivedPolicyDecision(PolicyAction action, API::Navigation* navigation, std::optional<std::pair<Ref<API::WebsitePolicies>, Ref<WebProcessProxy>>>&& websitePoliciesAndProcess, Ref<API::NavigationAction>&& navigationAction, WillContinueLoadInNewProcess willContinueLoadInNewProcess, std::optional<SandboxExtension::Handle> sandboxExtensionHandle, std::optional<PolicyDecisionConsoleMessage>&& consoleMessage, CompletionHandler<void(PolicyDecision&&)>&& completionHandler)
 {
+    m_inspectorController->didReceivePolicyDecision(action, navigation ? std::optional { navigation->navigationID() } : std::nullopt);
     if (!hasRunningProcess())
         return completionHandler(PolicyDecision { });
 
@@ -6671,6 +6872,7 @@ void WebPageProxy::viewScaleFactorDidChange(IPC::Connection& connection, double
     MESSAGE_CHECK_BASE(scaleFactorIsValid(scaleFactor), connection);
     if (!legacyMainFrameProcess().hasConnection(connection))
         return;
+    m_viewScaleFactor = scaleFactor;
 
     forEachWebContentProcess([&] (auto& process, auto pageID) {
         if (&process == &legacyMainFrameProcess())
@@ -7524,6 +7726,7 @@ void WebPageProxy::didDestroyNavigationShared(Ref<WebProcessProxy>&& process, We
     RefPtr protectedPageClient { pageClient() };
 
     m_navigationState->didDestroyNavigation(process->coreProcessIdentifier(), navigationID);
+    m_inspectorController->didDestroyNavigation(navigationID);
 }
 
 void WebPageProxy::didStartProvisionalLoadForFrame(IPC::Connection& connection, FrameIdentifier frameID, FrameInfoData&& frameInfo, ResourceRequest&& request, std::optional<WebCore::NavigationIdentifier> navigationID, URL&& url, URL&& unreachableURL, const UserData& userData, WallTime timestamp)
@@ -7918,6 +8121,8 @@ void WebPageProxy::didFailProvisionalLoadForFrameShared(Ref<WebProcessProxy>&& p
     m_failingProvisionalLoadURL = { };
     m_allowsLoadingAlternateHTMLForFailingProvisionalLoadURL = true;
 
+    m_inspectorController->didFailProvisionalLoadForFrame(*navigationID, error);
+
     // If the provisional page's load fails then we destroy the provisional page.
     if (m_provisionalPage && m_provisionalPage->mainFrame() == &frame && (willContinueLoading == WillContinueLoading::No))
         m_provisionalPage = nullptr;
@@ -9687,6 +9892,8 @@ void WebPageProxy::createNewPage(IPC::Connection& connection, WindowFeatures&& w
     if (RefPtr page = originatingFrameInfo->page())
         openerAppInitiatedState = page->lastNavigationWasAppInitiated();
 
+    m_inspectorController->willCreateNewPage(windowFeatures, request.url());
+
     auto completionHandler = [
         this,
         protectedThis = Ref { *this },
@@ -9774,6 +9981,7 @@ void WebPageProxy::createNewPage(IPC::Connection& connection, WindowFeatures&& w
     configuration->setInitialReferrerPolicy(effectiveReferrerPolicy);
     configuration->setWindowFeatures(WTF::move(windowFeatures));
     configuration->setOpenedMainFrameName(openedMainFrameName);
+    configuration->setOpenerPageForInspector(*this);
 
     if (RefPtr openerFrame = WebFrameProxy::webFrame(originatingFrameInfoData.frameID); navigationActionData.hasOpener && openerFrame) {
         configuration->setRelatedPage(*this);
@@ -9809,6 +10017,7 @@ void WebPageProxy::createNewPage(IPC::Connection& connection, WindowFeatures&& w
 void WebPageProxy::showPage()
 {
     m_uiClient->showPage(this);
+    m_inspectorController->didShowPage();
 }
 
 bool WebPageProxy::hasOpenedPage() const
@@ -9952,6 +10161,10 @@ void WebPageProxy::closePage()
     if (isClosed())
         return;
 
+#if ENABLE(CONTEXT_MENUS)
+    if (m_activeContextMenu)
+        m_activeContextMenu->hide();
+#endif
     WEBPAGEPROXY_RELEASE_LOG(Process, "closePage:");
     if (RefPtr pageClient = this->pageClient())
         pageClient->clearAllEditCommands();
@@ -9991,6 +10204,8 @@ void WebPageProxy::runJavaScriptAlert(IPC::Connection& connection, FrameIdentifi
 
     auto showModal = [protectedThis = Ref { *this }](RefPtr<WebFrameProxy>&& frame, FrameInfoData&& frameInfo, String&& message, CompletionHandler<void()>&& reply) mutable {
         protectedThis->runModalJavaScriptDialog(WTF::move(frame), WTF::move(frameInfo), WTF::move(message), [reply = WTF::move(reply)](WebPageProxy& page, WebFrameProxy* frame, FrameInfoData&& frameInfo, String&& message, CompletionHandler<void()>&& completion) mutable {
+            if (page.m_inspectorDialogAgent)
+                page.m_inspectorDialogAgent->javascriptDialogOpening("alert"_s, message);
             page.m_uiClient->runJavaScriptAlert(page, WTF::move(message), frame, WTF::move(frameInfo), [reply = WTF::move(reply), completion = WTF::move(completion)]() mutable {
                 reply();
                 completion();
@@ -10024,6 +10239,8 @@ void WebPageProxy::runJavaScriptConfirm(IPC::Connection& connection, FrameIdenti
         if (RefPtr automationSession = configuration().processPool().automationSession())
             automationSession->willShowJavaScriptDialog(*this, message, std::nullopt);
     }
+    if (m_inspectorDialogAgent)
+        m_inspectorDialogAgent->javascriptDialogOpening("confirm"_s, message);
 
     auto showModal = [protectedThis = Ref { *this }](RefPtr<WebFrameProxy>&& frame, FrameInfoData&& frameInfo, String&& message, CompletionHandler<void(bool)>&& reply) mutable {
         protectedThis->runModalJavaScriptDialog(WTF::move(frame), WTF::move(frameInfo), WTF::move(message), [reply = WTF::move(reply)](WebPageProxy& page, WebFrameProxy* frame, FrameInfoData&& frameInfo, String&& message, CompletionHandler<void()>&& completion) mutable {
@@ -10060,6 +10277,8 @@ void WebPageProxy::runJavaScriptPrompt(IPC::Connection& connection, FrameIdentif
         if (RefPtr automationSession = configuration().processPool().automationSession())
             automationSession->willShowJavaScriptDialog(*this, message, defaultValue);
     }
+    if (m_inspectorDialogAgent)
+        m_inspectorDialogAgent->javascriptDialogOpening("prompt"_s, message, defaultValue);
 
     auto showModal = [protectedThis = Ref { *this }](RefPtr<WebFrameProxy>&& frame, FrameInfoData&& frameInfo, String&& message, String&& defaultValue, CompletionHandler<void(const String&)>&& reply) mutable {
         protectedThis->runModalJavaScriptDialog(WTF::move(frame), WTF::move(frameInfo), WTF::move(message), [reply = WTF::move(reply), defaultValue = WTF::move(defaultValue)](WebPageProxy& page, WebFrameProxy* frame, FrameInfoData&& frameInfo, String&& message, CompletionHandler<void()>&& completion) mutable {
@@ -10274,6 +10493,8 @@ void WebPageProxy::runBeforeUnloadConfirmPanel(IPC::Connection& connection, Fram
             return;
         }
     }
+    if (m_inspectorDialogAgent)
+        m_inspectorDialogAgent->javascriptDialogOpening("beforeunload"_s, message);
 
     // Since runBeforeUnloadConfirmPanel() can spin a nested run loop we need to turn off the responsiveness timer and the tryClose timer.
     webProcess->stopResponsivenessTimer();
@@ -10963,6 +11184,11 @@ void WebPageProxy::resourceLoadDidCompleteWithError(ResourceLoadInfo&& loadInfo,
 }
 
 #if ENABLE(FULLSCREEN_API)
+void WebPageProxy::setFullScreenManagerClientOverride(std::unique_ptr<WebFullScreenManagerProxyClient>&& client)
+{
+    m_fullScreenManagerClientOverride = WTF::move(client);
+}
+
 WebFullScreenManagerProxy* WebPageProxy::fullScreenManager()
 {
     return m_fullScreenManager.get();
@@ -11092,6 +11318,17 @@ void WebPageProxy::requestDOMPasteAccess(IPC::Connection& connection, DOMPasteAc
         }
     }
 
+    if (isControlledByAutomation()) {
+        DOMPasteAccessResponse response = DOMPasteAccessResponse::DeniedForGesture;
+        if (permissionForAutomation(originIdentifier, "clipboard-read"_s).value_or(false)) {
+            response = DOMPasteAccessResponse::GrantedForGesture;
+            // Grant access to general pasteboard.
+            willPerformPasteCommand(DOMPasteAccessCategory::General, [] () { }, frameID);
+        }
+        completionHandler(response);
+        return;
+    }
+
     protect(pageClient())->requestDOMPasteAccess(pasteAccessCategory, requiresInteraction, elementRect, originIdentifier, WTF::move(completionHandler));
 }
 
@@ -12074,6 +12311,8 @@ void WebPageProxy::mouseEventHandlingCompleted(std::optional<WebEventType> event
         if (RefPtr automationSession = configuration().processPool().automationSession())
             automationSession->mouseEventsFlushedForPage(*this);
         didFinishProcessingAllPendingMouseEvents();
+        if (m_dragEventsQueued == 0)
+            m_inspectorController->didProcessAllPendingMouseEvents();
     }
 }
 
@@ -12132,6 +12371,7 @@ void WebPageProxy::keyEventHandlingCompleted(std::optional<WebEventType> eventTy
         if (RefPtr automationSession = configuration().processPool().automationSession())
             automationSession->keyboardEventsFlushedForPage(*this);
         didFinishProcessingAllPendingKeyEvents();
+        m_inspectorController->didProcessAllPendingKeyboardEvents();
     }
 }
 
@@ -12576,7 +12816,10 @@ void WebPageProxy::dispatchProcessDidTerminate(WebProcessProxy& process, Process
         protect(browsingContextGroup())->processDidTerminate(*this, process);
     }
 
-    bool handledByClient = false;
+    bool handledByClient = m_inspectorController->pageCrashed(reason);
+    if (handledByClient)
+        return;
+
     if (m_loaderClient)
         handledByClient = reason != ProcessTerminationReason::RequestedByClient && m_loaderClient->processDidCrash(*this);
     else
@@ -13251,6 +13494,9 @@ WebPageCreationParameters WebPageProxy::creationParameters(WebProcessProxy& proc
     parameters.allowPostingLegacySynchronousMessages = m_configuration->allowPostingLegacySynchronousMessages();
     parameters.backgroundTextExtractionEnabled = m_configuration->backgroundTextExtractionEnabled();
 
+    parameters.deviceOrientationOverride = m_deviceOrientationOverride;
+    parameters.shouldPauseInInspectorWhenShown = m_inspectorController->shouldPauseInInspectorWhenShown();
+
 #if ENABLE(APP_HIGHLIGHTS)
     parameters.appHighlightsVisible = appHighlightsVisibility() ? HighlightVisibility::Visible : HighlightVisibility::Hidden;
 #endif
@@ -13429,8 +13675,47 @@ void WebPageProxy::allowGamepadAccess()
 
 #endif // ENABLE(GAMEPAD)
 
+bool WebPageProxy::shouldSendAutomationCredentialsForProtectionSpace(const WebProtectionSpace& protectionSpace)
+{
+    if (m_authOriginForAutomation.has_value() && !m_authOriginForAutomation.value().isEmpty()) {
+        switch (protectionSpace.serverType()) {
+            case WebCore::ProtectionSpace::ServerType::HTTP:
+                if (m_authOriginForAutomation.value().protocol() != "http"_s)
+                    return false;
+                break;
+            case WebCore::ProtectionSpace::ServerType::HTTPS:
+                if (m_authOriginForAutomation.value().protocol() != "https"_s)
+                    return false;
+                break;
+            default:
+                return false;
+        }
+
+        if (protectionSpace.host() != m_authOriginForAutomation.value().host())
+            return false;
+
+        if (protectionSpace.port() != m_authOriginForAutomation.value().port().value_or(0))
+            return false;
+    }
+    return true;
+}
+
 void WebPageProxy::didReceiveAuthenticationChallengeProxy(Ref<AuthenticationChallengeProxy>&& authenticationChallenge, NegotiatedLegacyTLS negotiatedLegacyTLS)
 {
+    if (authenticationChallenge->core().protectionSpace().authenticationScheme() == WebCore::ProtectionSpaceBaseAuthenticationScheme::ServerTrustEvaluationRequested && websiteDataStore().ignoreTLSErrors()) {
+        authenticationChallenge->listener().completeChallenge(AuthenticationChallengeDisposition::UseCredential, WebCore::Credential("accept server trust"_s, ""_s, WebCore::CredentialPersistence::None));
+        return;
+    }
+
+    if (m_credentialsForAutomation.has_value()) {
+        if (m_credentialsForAutomation->isEmpty() || authenticationChallenge->core().previousFailureCount() ||
+            !shouldSendAutomationCredentialsForProtectionSpace(*authenticationChallenge->protectionSpace())) {
+            authenticationChallenge->listener().completeChallenge(AuthenticationChallengeDisposition::PerformDefaultHandling);
+            return;
+        }
+        authenticationChallenge->listener().completeChallenge(AuthenticationChallengeDisposition::UseCredential, *m_credentialsForAutomation);
+        return;
+    }
     if (negotiatedLegacyTLS == NegotiatedLegacyTLS::Yes) {
         m_navigationClient->shouldAllowLegacyTLS(*this, authenticationChallenge.get(), [this, protectedThis = Ref { *this }, authenticationChallenge] (bool shouldAllowLegacyTLS) {
             if (shouldAllowLegacyTLS)
@@ -13526,6 +13811,12 @@ void WebPageProxy::requestGeolocationPermissionForFrame(IPC::Connection& connect
             request->deny();
     };
 
+    if (isControlledByAutomation()) {
+        auto securityOrigin = frameInfo.securityOrigin.securityOrigin();
+        completionHandler(permissionForAutomation(securityOrigin->toString(), "geolocation"_s).value_or(false));
+        return;
+    }
+
     // FIXME: Once iOS migrates to the new WKUIDelegate SPI, clean this up
     // and make it one UIClient call that calls the completionHandler with false
     // if there is no delegate instead of returning the completionHandler
@@ -13634,6 +13925,12 @@ void WebPageProxy::queryPermission(const ClientOrigin& clientOrigin, const Permi
             shouldChangeDeniedToPrompt = false;
 
         if (sessionID().isEphemeral()) {
+            auto permission = permissionForAutomation(clientOrigin.topOrigin.toString(), name);
+            if (permission.has_value()) {
+                completionHandler(permission.value() ? PermissionState::Granted : PermissionState::Denied);
+                return;
+            }
+
             completionHandler(shouldChangeDeniedToPrompt ? PermissionState::Prompt : PermissionState::Denied);
             return;
         }
@@ -13648,6 +13945,12 @@ void WebPageProxy::queryPermission(const ClientOrigin& clientOrigin, const Permi
         return;
     }
 
+    auto permission = permissionForAutomation(clientOrigin.topOrigin.toString(), name);
+    if (permission.has_value()) {
+        completionHandler(permission.value() ? PermissionState::Granted : PermissionState::Denied);
+        return;
+    }
+
     if (!canAPISucceed) {
         completionHandler(shouldChangeDeniedToPrompt ? PermissionState::Prompt : PermissionState::Denied);
         return;
diff --git a/Source/WebKit/UIProcess/WebPageProxy.h b/Source/WebKit/UIProcess/WebPageProxy.h
index c304883cbac2d21900bd09c7d7bc6e9701597e15..7083a7d4aba95ae552cbeb2b20440448a740ddca 100644
--- a/Source/WebKit/UIProcess/WebPageProxy.h
+++ b/Source/WebKit/UIProcess/WebPageProxy.h
@@ -28,6 +28,7 @@
 // Including more headers here slows down build times a lot.
 // Use forward declarations and WebPageProxyInternals.h instead.
 #include "APIObject.h"
+#include "APIWebsitePolicies.h"
 #include "MessageReceiver.h"
 #include <wtf/ApproximateTime.h>
 #include <wtf/CheckedRef.h>
@@ -40,6 +41,20 @@
 #include <wtf/SwiftBridging.h>
 #include <wtf/UniqueRef.h>
 #include <wtf/WeakHashSet.h>
+#include "InspectorDialogAgent.h"
+#include "WebProtectionSpace.h"
+#include <WebCore/Credential.h>
+#include <WebCore/IntRect.h>
+#include "WebPageDiagnosticLoggingClient.h"
+#include "WebPageInjectedBundleClient.h"
+#include "WebPreferences.h"
+#include "ViewSnapshotStore.h"
+
+OBJC_CLASS NSPasteboard;
+
+#if PLATFORM(GTK) || PLATFORM(WPE)
+#include <WebCore/SelectionData.h>
+#endif
 
 #if USE(COORDINATED_GRAPHICS) && HAVE(DISPLAY_LINK)
 #include "DisplayLinkObserverID.h"
@@ -127,6 +142,7 @@ class DragData;
 class Exception;
 class FloatPoint;
 class FloatQuad;
+typedef HashMap<unsigned, Vector<String>> DragDataMap;
 class FloatRect;
 class FloatSize;
 class FontAttributeChanges;
@@ -839,6 +855,8 @@ public:
 
     RefPtr<WebAutomationSession> activeAutomationSession() const;
 
+    InspectorDialogAgent* inspectorDialogAgent() { return m_inspectorDialogAgent; }
+    void setInspectorDialogAgent(InspectorDialogAgent * dialogAgent) { m_inspectorDialogAgent = dialogAgent; }
     WebPageInspectorController& inspectorController() LIFETIME_BOUND { return m_inspectorController.get(); }
 
 #if PLATFORM(IOS_FAMILY)
@@ -872,6 +890,7 @@ public:
     bool NODELETE hasSleepDisabler() const;
 
 #if ENABLE(FULLSCREEN_API)
+    void setFullScreenManagerClientOverride(std::unique_ptr<WebFullScreenManagerProxyClient>&&);
     WebFullScreenManagerProxy* NODELETE fullScreenManager();
     void setFullScreenClientForTesting(std::unique_ptr<WebKit::WebFullScreenManagerProxyClient>&&);
 
@@ -940,6 +959,12 @@ public:
 
     void setPageLoadStateObserver(RefPtr<PageLoadStateObserverBase>&&);
 
+    void setAuthCredentialsForAutomation(std::optional<WebCore::Credential>&&, std::optional<URL>&&);
+    void setPermissionsForAutomation(const UncheckedKeyHashMap<String, HashSet<String>>&);
+    void setOrientationOverride(std::optional<int>&& angle);
+    void setActiveForAutomation(std::optional<bool> active);
+    void logToStderr(const String& str);
+
     void initializeWebPage(const WebCore::Site&, WebCore::SandboxFlags, WebCore::ReferrerPolicy);
     void setDrawingArea(RefPtr<DrawingAreaProxy>&&);
 
@@ -971,6 +996,8 @@ public:
     RefPtr<API::Navigation> loadRequest(WebCore::ResourceRequest&&, WebCore::ShouldOpenExternalURLsPolicy, WebCore::NavigationUpgradeToHTTPSBehavior);
     RefPtr<API::Navigation> loadRequest(WebCore::ResourceRequest&&, WebCore::ShouldOpenExternalURLsPolicy, WebCore::NavigationUpgradeToHTTPSBehavior, std::unique_ptr<NavigationActionData>&&, API::Object* userData = nullptr, bool isRequestFromClientOrUserInput = true);
 
+    RefPtr<API::Navigation> loadRequestForInspector(WebCore::ResourceRequest&&, WebFrameProxy*);
+
     RefPtr<API::Navigation> loadFile(const String& fileURL, const String& resourceDirectoryURL, bool isAppInitiated = true, API::Object* userData = nullptr);
     RefPtr<API::Navigation> loadData(Ref<WebCore::SharedBuffer>&&, const String& MIMEType, const String& encoding, const String& baseURL, API::Object* userData = nullptr);
     RefPtr<API::Navigation> loadData(Ref<WebCore::SharedBuffer>&&, const String& MIMEType, const String& encoding, const String& baseURL, API::Object* userData, WebCore::ShouldOpenExternalURLsPolicy);
@@ -1072,6 +1099,7 @@ public:
     void restoreSelectionInFocusedEditableElement();
 
     PageClient* NODELETE pageClient() const;
+    bool hasPageClient() const { return !!m_pageClient; }
 
     void setViewNeedsDisplay(const WebCore::Region&);
     void requestScroll(const WebCore::FloatPoint& scrollPosition, const WebCore::IntPoint& scrollOrigin, WebCore::ScrollIsAnimated, WebCore::InterruptScrollAnimation);
@@ -1755,11 +1783,14 @@ public:
     void didStartDrag(const std::optional<WebCore::FrameIdentifier>& = std::nullopt);
     void dragCancelled();
     void setDragCaretRect(const WebCore::IntRect&);
+    void setInterceptDrags(bool shouldIntercept);
+    bool cancelDragIfNeeded();
 #if PLATFORM(COCOA)
     void propagateDragAndDrop(DragEventForwardingData&&, const String&, WebCore::DragData&&);
     void startDrag(const WebCore::DragItem&, WebCore::ShareableBitmapHandle&& dragImageHandle, const std::optional<WebCore::NodeIdentifier>&, const std::optional<WebCore::FrameIdentifier>& = std::nullopt);
     void setPromisedDataForImage(IPC::Connection&, const String& pasteboardName, WebCore::SharedMemoryHandle&& imageHandle, const String& filename, const String& extension,
         const String& title, const String& url, const String& visibleURL, WebCore::SharedMemoryHandle&& archiveHandle, const String& originIdentifier);
+    void releaseInspectorDragPasteboard();
 #endif
 #if PLATFORM(GTK) || PLATFORM(WPE)
     void startDrag(WebCore::SelectionData&&, OptionSet<WebCore::DragOperation>, std::optional<WebCore::ShareableBitmapHandle>&& dragImage, WebCore::IntPoint&& dragImageHotspot);
@@ -1767,6 +1798,9 @@ public:
 #if ENABLE(MODEL_PROCESS)
     void modelDragEnded(const WebCore::NodeIdentifier);
 #endif
+#if PLATFORM(WIN)
+    void startDrag(WebCore::DragDataMap&& dragDataMap);
+#endif
 #endif
 
     void processDidBecomeUnresponsive(WebProcessProxy&);
@@ -2030,6 +2064,7 @@ public:
     void setViewportSizeForCSSViewportUnits(const WebCore::FloatSize&);
     WebCore::FloatSize NODELETE viewportSizeForCSSViewportUnits() const;
 
+    bool shouldSendAutomationCredentialsForProtectionSpace(const WebProtectionSpace&);
     void didReceiveAuthenticationChallengeProxy(Ref<AuthenticationChallengeProxy>&&, NegotiatedLegacyTLS);
     void negotiatedLegacyTLS();
     void didNegotiateModernTLS(const URL&);
@@ -2063,6 +2098,8 @@ public:
     // TODO Replace RefPtr with Expected for error reporting https://webkit.org/b/300271
     RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&);
     RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&, ForceSoftwareCapturingViewportSnapshot);
+#elif PLATFORM(WPE)
+    RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&) { return nullptr; }
 #endif
 
     void serializeAndWrapCryptoKey(IPC::Connection&, WebCore::CryptoKeyData&&, CompletionHandler<void(std::optional<Vector<uint8_t>>&&)>&&);
@@ -3202,6 +3239,7 @@ private:
     RefPtr<API::Navigation> launchProcessForReload();
 
     void requestNotificationPermission(const String& originString, CompletionHandler<void(bool allowed)>&&);
+    std::optional<bool> permissionForAutomation(const String& origin, const String& permission) const;
 
 #if ENABLE(WEB_ARCHIVE)
     bool NODELETE shouldAlwaysPromptForPermission(WebCore::PermissionName) const;
@@ -3752,11 +3790,13 @@ private:
     String m_openedMainFrameName;
 
     RefPtr<WebInspectorUIProxy> m_inspector;
+    InspectorDialogAgent* m_inspectorDialogAgent { nullptr };
 
     Deque<std::pair<WebUndoStepID, UndoOrRedo>> m_pendingUndoRedo;
     uint32_t m_undoVersion { 0 };
 
 #if ENABLE(FULLSCREEN_API)
+    std::unique_ptr<WebFullScreenManagerProxyClient> m_fullScreenManagerClientOverride;
     RefPtr<WebFullScreenManagerProxy> m_fullScreenManager;
     std::unique_ptr<API::FullscreenClient> m_fullscreenClient;
 #endif
@@ -3962,6 +4002,22 @@ private:
     std::optional<WebCore::DragOperation> m_currentDragOperation;
     bool m_currentDragIsOverFileInput { false };
     unsigned m_currentDragNumberOfFilesToBeAccepted { 0 };
+    WebCore::IntRect m_currentDragCaretRect;
+    WebCore::IntRect m_currentDragCaretEditableElementRect;
+    bool m_interceptDrags { false };
+    OptionSet<WebCore::DragOperation> m_dragSourceOperationMask;
+    WebCore::IntPoint m_lastMousePositionForDrag;
+    int m_dragEventsQueued = 0;
+#if PLATFORM(COCOA)
+    std::optional<String> m_dragSelectionData;
+    String m_overrideDragPasteboardName;
+#endif
+#if PLATFORM(GTK) || PLATFORM(WPE)
+    std::optional<WebCore::SelectionData> m_dragSelectionData;
+#endif
+#if PLATFORM(WIN)
+    std::optional<WebCore::DragDataMap> m_dragSelectionData;
+#endif
 #endif
 
     bool m_mainFrameHasHorizontalScrollbar { false };
@@ -4132,6 +4188,11 @@ private:
         RefPtr<API::Object> messageBody;
     };
     Vector<InjectedBundleMessage> m_pendingInjectedBundleMessages;
+    std::optional<WebCore::Credential> m_credentialsForAutomation;
+    std::optional<URL> m_authOriginForAutomation;
+    UncheckedKeyHashMap<String, HashSet<String>> m_permissionsForAutomation;
+    std::optional<int> m_deviceOrientationOverride;
+    std::optional<bool> m_activeForAutomation;
         
 #if PLATFORM(IOS_FAMILY) && ENABLE(DEVICE_ORIENTATION)
     RefPtr<WebDeviceOrientationUpdateProviderProxy> m_webDeviceOrientationUpdateProviderProxy;
diff --git a/Source/WebKit/UIProcess/WebPageProxy.messages.in b/Source/WebKit/UIProcess/WebPageProxy.messages.in
index 155543cbd71b814586ab391daaa2efa2d11c22ea..b39e2260133f4aa7fe9580496bd4237b3fd52629 100644
--- a/Source/WebKit/UIProcess/WebPageProxy.messages.in
+++ b/Source/WebKit/UIProcess/WebPageProxy.messages.in
@@ -35,6 +35,7 @@ messages -> WebPageProxy {
     RunJavaScriptConfirm(WebCore::FrameIdentifier frameID, struct WebKit::FrameInfoData frameInfo, String message) -> (bool result) Synchronous
     RunJavaScriptPrompt(WebCore::FrameIdentifier frameID, struct WebKit::FrameInfoData frameInfo, String message, String defaultValue) -> (String result) Synchronous
     MouseDidMoveOverElement(struct WebKit::WebHitTestResultData hitTestResultData, OptionSet<WebKit::WebEventModifier> modifiers)
+    LogToStderr(String text)
 
     DidReceiveEventIPC(enum:uint32_t WebKit::WebEventType eventType, bool handled, struct std::optional<WebCore::RemoteUserInputEventData> remoteUserInputEventData)
     SetCursor(WebCore::Cursor cursor)
@@ -365,6 +366,10 @@ messages -> WebPageProxy {
     StartDrag(WebCore::SelectionData selectionData, OptionSet<WebCore::DragOperation> dragOperationMask, std::optional<WebCore::ShareableBitmapHandle> dragImage, WebCore::IntPoint dragImageHotspot)
 #endif
 
+#if PLATFORM(WIN) && ENABLE(DRAG_SUPPORT)
+    StartDrag(HashMap<unsigned, Vector<String>> dragDataMap)
+#endif
+
 #if PLATFORM(IOS_FAMILY) && ENABLE(DRAG_SUPPORT)
     WillReceiveEditDragSnapshot()
     DidReceiveEditDragSnapshot(RefPtr<WebCore::TextIndicator> textIndicator)
diff --git a/Source/WebKit/UIProcess/WebProcessCache.cpp b/Source/WebKit/UIProcess/WebProcessCache.cpp
index 1593c4e060fb5fbf399c7d53cb7a81896b945556..c10a4b847f118012380a8d8f35984c81c841d697 100644
--- a/Source/WebKit/UIProcess/WebProcessCache.cpp
+++ b/Source/WebKit/UIProcess/WebProcessCache.cpp
@@ -125,6 +125,10 @@ bool WebProcessCache::canCacheProcess(WebProcessProxy& process) const
         return false;
     }
 
+    auto sessionID = process.websiteDataStore()->sessionID();
+    if (sessionID.isEphemeral() && !process.processPool().hasPagesUsingWebsiteDataStore(*process.websiteDataStore()))
+        return false;
+
     return true;
 }
 
diff --git a/Source/WebKit/UIProcess/WebProcessPool.cpp b/Source/WebKit/UIProcess/WebProcessPool.cpp
index c9e5f1f1a7dfed59616429838f635538c34124f9..af87d3e1c00f0513658180c5fb397621c1b5505a 100644
--- a/Source/WebKit/UIProcess/WebProcessPool.cpp
+++ b/Source/WebKit/UIProcess/WebProcessPool.cpp
@@ -423,10 +423,10 @@ void WebProcessPool::setAutomationClient(std::unique_ptr<API::AutomationClient>&
 
 void WebProcessPool::setOverrideLanguages(Vector<String>&& languages)
 {
-    WebKit::setOverrideLanguages(WTF::move(languages));
+    m_configuration->setOverrideLanguages(WTF::move(languages));
 
     LOG_WITH_STREAM(Language, stream << "WebProcessPool is setting OverrideLanguages: " << languages);
-    sendToAllProcesses(Messages::WebProcess::UserPreferredLanguagesChanged(overrideLanguages()));
+    sendToAllProcesses(Messages::WebProcess::UserPreferredLanguagesChanged(m_configuration->overrideLanguages()));
 
 #if ENABLE(GPU_PROCESS)
     if (RefPtr gpuProcess = GPUProcessProxy::singletonIfCreated())
@@ -434,9 +434,10 @@ void WebProcessPool::setOverrideLanguages(Vector<String>&& languages)
 #endif
 #if USE(SOUP)
     for (Ref networkProcess : NetworkProcessProxy::allNetworkProcesses())
-        networkProcess->send(Messages::NetworkProcess::UserPreferredLanguagesChanged(overrideLanguages()), 0);
+        networkProcess->send(Messages::NetworkProcess::UserPreferredLanguagesChanged(m_configuration->overrideLanguages()), 0);
 #endif
 }
+/* end playwright revert fb205fb */
 
 void WebProcessPool::fullKeyboardAccessModeChanged(bool fullKeyboardAccessEnabled)
 {
@@ -977,7 +978,7 @@ void WebProcessPool::initializeNewWebProcess(WebProcessProxy& process, WebsiteDa
 #endif
 
     parameters.cacheModel = LegacyGlobalSettings::singleton().cacheModel();
-    parameters.overrideLanguages = overrideLanguages();
+    parameters.overrideLanguages = configuration().overrideLanguages(); /* playwright revert fb205fb */
     LOG_WITH_STREAM(Language, stream << "WebProcessPool is initializing a new web process with overrideLanguages: " << parameters.overrideLanguages);
 
     parameters.urlSchemesRegisteredAsSecure = copyToVector(LegacyGlobalSettings::singleton().schemesToRegisterAsSecure());
@@ -1056,7 +1057,7 @@ void WebProcessPool::initializeNewWebProcess(WebProcessProxy& process, WebsiteDa
     if (!injectedBundleInitializationUserData)
         injectedBundleInitializationUserData = m_injectedBundleInitializationUserData;
     parameters.initializationUserData = UserData(process.transformObjectsToHandles(injectedBundleInitializationUserData.get()));
-    
+
     if (websiteDataStore)
         parameters.websiteDataStoreParameters = webProcessDataStoreParameters(process, *websiteDataStore);
 
@@ -1150,14 +1151,14 @@ void WebProcessPool::processDidFinishLaunching(WebProcessProxy& process)
     // Sometimes the memorySampler gets initialized after process initialization has happened but before the process has finished launching
     // so check if it needs to be started here
     if (m_memorySamplerEnabled) {
-        SandboxExtension::Handle sampleLogSandboxHandle;        
+        SandboxExtension::Handle sampleLogSandboxHandle;
         WallTime now = WallTime::now();
         auto sampleLogFilePath = makeString("WebProcess"_s, now.secondsSinceEpoch().secondsAs<uint64_t>(), "pid"_s, process.processID());
         if (auto handleAndFilePath = SandboxExtension::createHandleForTemporaryFile(sampleLogFilePath, SandboxExtension::Type::ReadWrite)) {
             sampleLogSandboxHandle = WTF::move(handleAndFilePath->first);
             sampleLogFilePath = WTF::move(handleAndFilePath->second);
         }
-        
+
         process.send(Messages::WebProcess::StartMemorySampler(WTF::move(sampleLogSandboxHandle), sampleLogFilePath, m_memorySamplerInterval), 0);
     }
 
@@ -1327,6 +1328,12 @@ Ref<WebPageProxy> WebProcessPool::createWebPage(PageClient& pageClient, Ref<API:
     auto enhancedSecurity = (protect(pageConfiguration->preferences())->forceEnhancedSecurity() || pageConfiguration->isEnhancedSecurityEnabled() || useEnhancedSecurityFallback) ? EnhancedSecurity::EnabledPolicy : EnhancedSecurity::Disabled;
 
     RefPtr relatedPage = pageConfiguration->relatedPage();
+
+    // Fix WPE/GTK crashes after 310806@main. upstream-status (pending). See issue https://github.com/microsoft/playwright-browsers/issues/2171
+    // Ensure popups inherit the StorageBlockingPolicy of the parent so they stay compatible for same-process popup creation.
+    if (relatedPage)
+        pageConfiguration->preferences().setStorageBlockingPolicy(relatedPage->preferences().storageBlockingPolicy());
+
     bool siteIsolationEnabled = protect(pageConfiguration->preferences())->siteIsolationEnabled();
     if (siteIsolationEnabled)
         protect(pageConfiguration->preferences())->setUseUIProcessForBackForwardItemLoading(true);
@@ -1358,9 +1365,9 @@ Ref<WebPageProxy> WebProcessPool::createWebPage(PageClient& pageClient, Ref<API:
     }
 
     Ref userContentController = pageConfiguration->userContentController();
-    
+
     ASSERT(process);
-    
+
     process->setAllowTestOnlyIPC(pageConfiguration->allowTestOnlyIPC());
 
     auto page = process->createWebPage(pageClient, WTF::move(pageConfiguration));
@@ -1745,18 +1752,18 @@ void WebProcessPool::setEnhancedAccessibility(bool flag)
 {
     sendToAllProcesses(Messages::WebProcess::SetEnhancedAccessibility(flag));
 }
-    
+
 void WebProcessPool::startMemorySampler(const double interval)
-{    
+{
     // For new WebProcesses we will also want to start the Memory Sampler
     m_memorySamplerEnabled = true;
     m_memorySamplerInterval = interval;
-    
+
     // For UIProcess
 #if ENABLE(MEMORY_SAMPLER)
     WebMemorySampler::singleton()->start(interval);
 #endif
-    
+
     for (auto& process : m_processes) {
         if (!process->canSendMessage())
             continue;
@@ -1775,10 +1782,10 @@ void WebProcessPool::startMemorySampler(const double interval)
 }
 
 void WebProcessPool::stopMemorySampler()
-{    
+{
     // For WebProcess
     m_memorySamplerEnabled = false;
-    
+
     // For UIProcess
 #if ENABLE(MEMORY_SAMPLER)
     WebMemorySampler::singleton()->stop();
@@ -1830,7 +1837,7 @@ void WebProcessPool::setAutomationSession(RefPtr<WebAutomationSession>&& automat
 {
     if (RefPtr previousSession = m_automationSession)
         previousSession->setProcessPool(nullptr);
-    
+
     m_automationSession = WTF::move(automationSession);
 
 #if ENABLE(REMOTE_INSPECTOR)
@@ -2403,7 +2410,7 @@ std::tuple<Ref<WebProcessProxy>, RefPtr<SuspendedPageProxy>, ASCIILiteral> WebPr
     }
 
     auto reason = "Navigation is cross-site"_s;
-    
+
     if (m_configuration->alwaysKeepAndReuseSwappedProcesses()) {
         LOG(ProcessSwapping, "(ProcessSwapping) Considering re-use of a previously cached process for domain %s", targetSite.domain().string().utf8().data());
 
@@ -2508,7 +2515,7 @@ void WebProcessPool::setDomainsWithUserInteraction(HashSet<WebCore::RegistrableD
 }
 
 void WebProcessPool::setDomainsWithCrossPageStorageAccess(HashMap<TopFrameDomain, Vector<SubResourceDomain>>&& domains, CompletionHandler<void()>&& completionHandler)
-{    
+{
     Ref callbackAggregator = CallbackAggregator::create(WTF::move(completionHandler));
 
     for (Ref process : borrow(this->processes()).get())
diff --git a/Source/WebKit/UIProcess/WebProcessProxy.cpp b/Source/WebKit/UIProcess/WebProcessProxy.cpp
index 1f2073d6c2900da0994e09c3edaee6c67298fade..b7a2870799a36988a051efe48c62f1d975156751 100644
--- a/Source/WebKit/UIProcess/WebProcessProxy.cpp
+++ b/Source/WebKit/UIProcess/WebProcessProxy.cpp
@@ -215,6 +215,11 @@ Vector<Ref<WebProcessProxy>> WebProcessProxy::allProcesses()
     });
 }
 
+Vector<Ref<WebProcessProxy>> WebProcessProxy::allProcessesForInspector()
+{
+    return copyToVector(allProcesses());
+}
+
 RefPtr<WebProcessProxy> WebProcessProxy::processForIdentifier(ProcessIdentifier identifier)
 {
     return allProcessMap().get(identifier);
@@ -583,6 +588,26 @@ void WebProcessProxy::getLaunchOptions(ProcessLauncher::LaunchOptions& launchOpt
     if (WebKit::isInspectorProcessPool(processPool()))
         launchOptions.extraInitializationData.add<HashTranslatorASCIILiteral>("inspector-process"_s, "1"_s);
 
+    /* playwright revert fb205fb, 50f8fee */
+    LOG(Language, "WebProcessProxy is getting launch options.");
+    auto overrideLanguages = m_processPool->configuration().overrideLanguages();
+    if (overrideLanguages.isEmpty()) {
+        LOG(Language, "overrideLanguages() reports empty. Calling platformOverrideLanguages()");
+        overrideLanguages = platformOverrideLanguages();
+    }
+    if (!overrideLanguages.isEmpty()) {
+        StringBuilder languageString;
+        for (size_t i = 0; i < overrideLanguages.size(); ++i) {
+            if (i)
+                languageString.append(',');
+            languageString.append(overrideLanguages[i]);
+        }
+        LOG_WITH_STREAM(Language, stream << "Setting WebProcess's launch OverrideLanguages to " << languageString);
+        launchOptions.extraInitializationData.add<HashTranslatorASCIILiteral>("OverrideLanguages"_s, languageString.toString());
+    } else
+        LOG(Language, "overrideLanguages is still empty. Not setting WebProcess's launch OverrideLanguages.");
+    /* end playwright revert fb205fb, 50f8fee */
+
     launchOptions.nonValidInjectedCodeAllowed = shouldAllowNonValidInjectedCode();
 
     if (isPrewarmed())
diff --git a/Source/WebKit/UIProcess/WebProcessProxy.h b/Source/WebKit/UIProcess/WebProcessProxy.h
index 2bf85bf9e81bcca1c2c0830004a3cb6ef67708d0..4284c4b480346514dd3ba1ad4c01802ff151753b 100644
--- a/Source/WebKit/UIProcess/WebProcessProxy.h
+++ b/Source/WebKit/UIProcess/WebProcessProxy.h
@@ -208,6 +208,7 @@ public:
 
     static void forWebPagesWithOrigin(PAL::SessionID, const WebCore::SecurityOriginData&, NOESCAPE const Function<void(WebPageProxy&)>&);
     static Vector<std::pair<WebCore::ProcessIdentifier, WebCore::RegistrableDomain>> allowedFirstPartiesForCookies();
+    static Vector<Ref<WebProcessProxy>> allProcessesForInspector();
 
     void initializeWebProcess(WebProcessCreationParameters&&);
 
diff --git a/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.cpp b/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.cpp
index 200b1f02601242c6e2240ab6bbb7d2b7e093e5b4..a95b9dfb1939a1fb2ae271e34a00d7201dfe06aa 100644
--- a/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.cpp
+++ b/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.cpp
@@ -315,15 +315,10 @@ SOAuthorizationCoordinator& WebsiteDataStore::soAuthorizationCoordinator(const W
 
 static Ref<NetworkProcessProxy> networkProcessForSession(PAL::SessionID sessionID)
 {
-#if ((PLATFORM(GTK) || PLATFORM(WPE)) && !ENABLE(2022_GLIB_API))
-    if (sessionID.isEphemeral()) {
-        // Reuse a previous persistent session network process for ephemeral sessions.
-        for (auto& dataStore : allDataStores().values()) {
-            if (dataStore->isPersistent())
-                return dataStore->networkProcess();
-        }
-    }
+// Playwright begin
+#if PLATFORM(GTK) || PLATFORM(WPE)
     return NetworkProcessProxy::create();
+// Playwright end
 #else
     UNUSED_PARAM(sessionID);
     return NetworkProcessProxy::ensureDefaultNetworkProcess();
@@ -2100,6 +2095,15 @@ void WebsiteDataStore::setCacheModelSynchronouslyForTesting(CacheModel cacheMode
         processPool->setCacheModelSynchronouslyForTesting(cacheModel);
 }
 
+// Playwright begin
+#if !USE(SOUP)
+void WebsiteDataStore::setIgnoreTLSErrors(bool ignoreTLSErrors)
+{
+    m_ignoreTLSErrors = ignoreTLSErrors;
+}
+#endif
+// Playwright begin
+
 Vector<WebsiteDataStoreParameters> WebsiteDataStore::parametersFromEachWebsiteDataStore()
 {
     return WTF::map(allDataStores(), [](auto& entry) {
@@ -2524,6 +2528,12 @@ void WebsiteDataStore::lastPageLoadNetworkActivityCompletionCodeForTesting(WebCo
     protect(networkProcess())->lastPageLoadNetworkActivityCompletionCodeForTesting(m_sessionID, pageID, WTF::move(completionHandler));
 }
 
+void WebsiteDataStore::setDownloadForAutomation(std::optional<bool> allow, const String& downloadPath)
+{
+    m_allowDownloadForAutomation = allow;
+    m_downloadPathForAutomation = downloadPath;
+}
+
 #if ENABLE(APP_BOUND_DOMAINS)
 void WebsiteDataStore::hasAppBoundSession(CompletionHandler<void(bool)>&& completionHandler) const
 {
diff --git a/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.h b/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.h
index 8de753cfce229075cbfa2bc7a81eab3d2fe1fb03..f78922cea6147503e3bcbcf8869ebda2518ef62c 100644
--- a/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.h
+++ b/Source/WebKit/UIProcess/WebsiteData/WebsiteDataStore.h
@@ -103,6 +103,7 @@ class DeviceIdHashSaltStorage;
 class DownloadProxy;
 class NetworkProcessProxy;
 class SOAuthorizationCoordinator;
+class DownloadProxy;
 class VirtualAuthenticatorManager;
 class WebPageProxy;
 class WebProcessPool;
@@ -118,6 +119,7 @@ enum class UnifiedOriginStorageLevel : uint8_t;
 enum class WebsiteDataFetchOption : uint8_t;
 enum class WebsiteDataType : uint32_t;
 
+struct FrameInfoData;
 struct ITPThirdPartyData;
 struct NetworkProcessConnectionInfo;
 struct WebPushMessage;
@@ -127,6 +129,14 @@ struct WebsiteDataStoreParameters;
 enum RemoveDataTaskCounterType { };
 using RemoveDataTaskCounter = RefCounter<RemoveDataTaskCounterType>;
 
+class DownloadInstrumentation {
+public:
+    virtual void downloadCreated(const String& uuid, const WebCore::ResourceRequest&, const FrameInfoData& frameInfoData, WebPageProxy* page, RefPtr<DownloadProxy> download) = 0;
+    virtual void downloadFilenameSuggested(const String& uuid, const String& suggestedFilename) = 0;
+    virtual void downloadFinished(const String& uuid, const String& error) = 0;
+    virtual ~DownloadInstrumentation() = default;
+};
+
 class WebsiteDataStore : public API::ObjectImpl<API::Object::Type::WebsiteDataStore>, public CanMakeWeakPtr<WebsiteDataStore> {
 public:
     static WebsiteDataStore& defaultDataStore();
@@ -330,8 +340,10 @@ public:
 #if USE(SOUP)
     void setPersistentCredentialStorageEnabled(bool);
     bool persistentCredentialStorageEnabled() const { return m_persistentCredentialStorageEnabled && isPersistent(); }
+#endif
     void setIgnoreTLSErrors(bool);
     bool ignoreTLSErrors() const { return m_ignoreTLSErrors; }
+#if USE(SOUP)
     void setNetworkProxySettings(WebCore::SoupNetworkProxySettings&&);
     const WebCore::SoupNetworkProxySettings& networkProxySettings() const LIFETIME_BOUND { return m_networkProxySettings; }
     void setCookiePersistentStorage(const String&, SoupCookiePersistentStorageType);
@@ -422,6 +434,12 @@ public:
     static const String& defaultBaseDataDirectory();
 #endif
 
+    void setDownloadForAutomation(std::optional<bool> allow, const String& downloadPath);
+    std::optional<bool> allowDownloadForAutomation() { return m_allowDownloadForAutomation; };
+    String downloadPathForAutomation() { return m_downloadPathForAutomation; };
+    void setDownloadInstrumentation(DownloadInstrumentation* instrumentation) { m_downloadInstrumentation = instrumentation; };
+    DownloadInstrumentation* downloadInstrumentation() { return m_downloadInstrumentation; };
+
     void resetQuota(CompletionHandler<void()>&&);
     void resetStoragePersistedState(CompletionHandler<void()>&&);
 #if PLATFORM(IOS_FAMILY)
@@ -642,7 +660,9 @@ private:
 
 #if USE(SOUP)
     bool m_persistentCredentialStorageEnabled { true };
-    bool m_ignoreTLSErrors { true };
+#endif
+    bool m_ignoreTLSErrors { false };
+#if USE(SOUP)
     WebCore::SoupNetworkProxySettings m_networkProxySettings;
     String m_cookiePersistentStoragePath;
     SoupCookiePersistentStorageType m_cookiePersistentStorageType { SoupCookiePersistentStorageType::SQLite };
@@ -669,6 +689,10 @@ private:
     const RefPtr<API::HTTPCookieStore> m_cookieStore;
     RefPtr<NetworkProcessProxy> m_networkProcess;
 
+    std::optional<bool> m_allowDownloadForAutomation;
+    String m_downloadPathForAutomation;
+    DownloadInstrumentation* m_downloadInstrumentation { nullptr };
+
 #if HAVE(APP_SSO)
     const std::unique_ptr<SOAuthorizationCoordinator> m_soAuthorizationCoordinator;
 #endif
diff --git a/Source/WebKit/UIProcess/cairo/BackingStoreCairo.cpp b/Source/WebKit/UIProcess/cairo/BackingStoreCairo.cpp
index ad30e3705de228f71b2206a9da314451bbb2ca00..e46d97003021b06d17f66dd60f7ffcf2c69049cb 100644
--- a/Source/WebKit/UIProcess/cairo/BackingStoreCairo.cpp
+++ b/Source/WebKit/UIProcess/cairo/BackingStoreCairo.cpp
@@ -31,6 +31,7 @@
 #if USE(CAIRO)
 
 #include "UpdateInfo.h"
+#include "WebPageProxy.h"
 #include <WebCore/CairoUtilities.h>
 #include <WebCore/GraphicsContextCairo.h>
 #include <WebCore/IntRect.h>
diff --git a/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.cpp b/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.cpp
index b79d617e64cbfb9d6e8faa811a0bf2890e75fe05..1b022935348aa29760e13c6ceaa2a97cca21977e 100644
--- a/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.cpp
+++ b/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.cpp
@@ -114,6 +114,14 @@ void GeoclueGeolocationProvider::stop()
     }
 
     m_sourceType = LocationProviderSource::Unknown;
+    stopGeoclueClient();
+    g_cancellable_cancel(m_cancellable_start.get());
+    m_cancellable_start = nullptr;
+    g_cancellable_cancel(m_cancellable_setup.get());
+    m_cancellable_setup = nullptr;
+    g_cancellable_cancel(m_cancellable_create.get());
+    m_cancellable_create = nullptr;
+    destroyStateLater();
 }
 
 void GeoclueGeolocationProvider::setEnableHighAccuracy(bool enabled)
@@ -386,6 +394,8 @@ void GeoclueGeolocationProvider::createGeoclueClient(const char* clientPath)
         return;
     }
 
+    g_cancellable_cancel(m_cancellable_create.get());
+    m_cancellable_create = adoptGRef(g_cancellable_new());
     g_dbus_proxy_new_for_bus(G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr,
         "org.freedesktop.GeoClue2", clientPath, "org.freedesktop.GeoClue2.Client", m_cancellable.get(),
         [](GObject*, GAsyncResult* result, gpointer userData) {
diff --git a/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.h b/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.h
index 96bf77411e2e1f4c835f56b409dc179977d197ee..512af5ffce511711b502248e34e49e45e85dbc4e 100644
--- a/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.h
+++ b/Source/WebKit/UIProcess/geoclue/GeoclueGeolocationProvider.h
@@ -92,6 +92,9 @@ private:
         unsigned responseSignalId;
     } m_portal;
     GRefPtr<GCancellable> m_cancellable;
+    GRefPtr<GCancellable> m_cancellable_start;
+    GRefPtr<GCancellable> m_cancellable_setup;
+    GRefPtr<GCancellable> m_cancellable_create;
     UpdateNotifyFunction m_updateNotifyFunction;
     LocationProviderSource m_sourceType { LocationProviderSource::Unknown };
     RunLoop::Timer m_destroyLaterTimer;
diff --git a/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.cpp b/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..00483c4a7fdd24c93702c773687643ad045e7127
--- /dev/null
+++ b/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.cpp
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2026 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "BrowserInspectorWebSocketServer.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgent.h"
+#include "InspectorPlaywrightAgentClient.h"
+#include "WebKit2Initialize.h"
+#include <glib-object.h>
+#include <libsoup/soup-websocket-connection.h>
+#include <libsoup/soup.h>
+#include <wtf/glib/GRefPtr.h>
+#include <wtf/NeverDestroyed.h>
+
+namespace WebKit {
+
+namespace {
+
+class WebSocketFrontendChannel : public Inspector::FrontendChannel {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(WebSocketFrontendChannel);
+public:
+    explicit WebSocketFrontendChannel(SoupWebsocketConnection* connection)
+        : m_connection(connection)
+    {
+    }
+
+    ~WebSocketFrontendChannel() override = default;
+
+private:
+   ConnectionType connectionType() const override
+    {
+        return ConnectionType::Remote;
+    }
+
+    void sendMessageToFrontend(const String& message) override
+    {
+        soup_websocket_connection_send_text(m_connection.get(), message.utf8().data());
+    }
+
+    GRefPtr<SoupWebsocketConnection> m_connection;
+};
+
+class BrowserInspectorWebSocketServer {
+public:
+    BrowserInspectorWebSocketServer(std::unique_ptr<InspectorPlaywrightAgentClient> client, GRefPtr<SoupServer> soupServer)
+        : m_playwrightAgent(std::move(client))
+        , m_soupServer(std::move(soupServer))
+    {
+        soup_server_add_websocket_handler(m_soupServer.get(), nullptr, nullptr, nullptr, &BrowserInspectorWebSocketServer::handleWebSocketConnection, this, nullptr);
+    }
+
+private:
+    static void handleWebSocketConnection(SoupServer*, SoupServerMessage*, const char* path, SoupWebsocketConnection* connection, gpointer userData)
+    {
+        auto server = static_cast<BrowserInspectorWebSocketServer*>(userData);
+        if (!server->handleWebSocketConnection(connection)) {
+            soup_websocket_connection_close(connection, SOUP_WEBSOCKET_CLOSE_POLICY_VIOLATION, "WebSocket connection already established");
+            return;
+        }
+
+        g_signal_connect(connection, "closed", G_CALLBACK(+[](SoupWebsocketConnection* connection, gpointer userData) {
+            auto server = static_cast<BrowserInspectorWebSocketServer*>(userData);
+            server->handleConnectionClosed(connection);
+        }), server);
+
+        g_signal_connect(connection, "message", G_CALLBACK(+[] (SoupWebsocketConnection*, SoupWebsocketDataType messageType, GBytes* message, gpointer userData) {
+            auto server = static_cast<BrowserInspectorWebSocketServer*>(userData);
+            server->handleWebSocketMessage(messageType, message);
+        }), server);
+    }
+
+
+    void handleConnectionClosed(SoupWebsocketConnection* connection)
+    {
+        if (m_frontendChannel) {
+            m_playwrightAgent.disconnectFrontend();
+            m_frontendChannel.reset();
+        }
+    }
+
+    void handleWebSocketMessage(SoupWebsocketDataType messageType, GBytes* message)
+    {
+        if (messageType != SOUP_WEBSOCKET_DATA_TEXT) {
+            fprintf(stderr, "WebSocket message received non-text message: %d\n", messageType);
+            return;
+        }
+
+        gsize messageSize;
+        gconstpointer messageData = g_bytes_get_data(message, &messageSize);
+        String messageString = String::fromUTF8(std::span<const char8_t>(static_cast<const char8_t*>(messageData), messageSize));
+        fprintf(stderr, "WebSocket message received: %s\n", messageString.utf8().data());
+        m_playwrightAgent.dispatchMessageFromFrontend(messageString);
+    }
+
+    bool handleWebSocketConnection(SoupWebsocketConnection* connection)
+    {
+        if (m_frontendChannel) {
+            fprintf(stderr, "WebSocket connection already established\n");
+            return false;
+        }
+        m_frontendChannel = std::make_unique<WebSocketFrontendChannel>(connection);
+        m_playwrightAgent.connectFrontend(*m_frontendChannel);
+        return true;
+    }
+
+    InspectorPlaywrightAgent m_playwrightAgent;
+    GRefPtr<SoupServer> m_soupServer;
+    std::unique_ptr<WebSocketFrontendChannel> m_frontendChannel;
+};
+
+} // namespace
+
+void initializeBrowserInspectorWebSocket(unsigned port, std::unique_ptr<InspectorPlaywrightAgentClient> client)
+{
+    // Initialize main loop before creating inspector agent and starting the server.
+    WebKit::InitializeWebKit2();
+
+    GRefPtr<SoupServer> soupServer = adoptGRef(soup_server_new("server-header", "WebKit-Playwright-WSS", nullptr));
+
+    GUniqueOutPtr<GError> error;
+    const SoupServerListenOptions options = static_cast<SoupServerListenOptions>(0);
+    if (!soup_server_listen_local(soupServer.get(), port, options, &error.outPtr())) {
+        fprintf(stderr, "Failed to start WebSocket server at port %u: %s\n", port, error->message);
+        return;
+    }
+
+    int actualPort = port;
+    if (!actualPort) {
+        GSList* uris = soup_server_get_uris(soupServer.get());
+        g_assert_nonnull(uris);
+        GUri* uri = static_cast<GUri*>(uris->data);
+        actualPort = g_uri_get_port(uri);
+        g_slist_free_full(uris, reinterpret_cast<GDestroyNotify>(g_uri_unref));
+    }
+    if (actualPort == -1) {
+        fprintf(stderr, "Failed to start WebSocket server\n");
+        return;
+    }
+
+    static NeverDestroyed<BrowserInspectorWebSocketServer> server(std::move(client), std::move(soupServer));
+
+    fprintf(stderr, "Playwright listening on ws://localhost:%d\n", actualPort);
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.h b/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.h
new file mode 100644
index 0000000000000000000000000000000000000000..bd30f58d2d4afe85060eabf3bb178c20c0c73828
--- /dev/null
+++ b/Source/WebKit/UIProcess/glib/BrowserInspectorWebSocketServer.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2026 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+namespace WebKit {
+
+class InspectorPlaywrightAgentClient;
+
+void initializeBrowserInspectorWebSocket(unsigned port, std::unique_ptr<InspectorPlaywrightAgentClient> client);
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
+
diff --git a/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.cpp b/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e5a8e68580d8ba7ad968d1736220793711214988
--- /dev/null
+++ b/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.cpp
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorPlaywrightAgentClientGLib.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgent.h"
+#include "PageClient.h"
+#include "ViewSnapshotStore.h"
+#include "WebAutomationSession.h"
+#include "WebKitBrowserInspectorPrivate.h"
+#include "WebKitWebContextPrivate.h"
+#include "WebKitWebsiteDataManagerPrivate.h"
+#include "WebKitWebViewPrivate.h"
+#include "WebPageProxy.h"
+#include <wtf/HashMap.h>
+#include <wtf/RefPtr.h>
+#include <wtf/text/Base64.h>
+#include <wtf/text/StringView.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebKit {
+
+static WebCore::SoupNetworkProxySettings parseRawProxySettings(const String& proxyServer, const char* const* ignoreHosts)
+{
+    WebCore::SoupNetworkProxySettings settings;
+    if (proxyServer.isEmpty())
+        return settings;
+
+    settings.mode = WebCore::SoupNetworkProxySettings::Mode::Custom;
+    settings.defaultProxyURL = proxyServer.utf8();
+    settings.ignoreHosts.reset(g_strdupv(const_cast<char**>(ignoreHosts)));
+    return settings;
+}
+
+static WebCore::SoupNetworkProxySettings parseProxySettings(const String& proxyServer, const String& proxyBypassList)
+{
+    Vector<const char*> ignoreHosts;
+    if (!proxyBypassList.isEmpty()) {
+        Vector<String> tokens = proxyBypassList.split(',');
+        Vector<CString> protectTokens;
+        for (String token : tokens) {
+            CString cstr = token.utf8();
+            ignoreHosts.append(cstr.data());
+            protectTokens.append(WTF::move(cstr));
+        }
+    }
+    ignoreHosts.append(nullptr);
+    return parseRawProxySettings(proxyServer, ignoreHosts.mutableSpan().data());
+}
+
+InspectorPlaywrightAgentClientGlib::InspectorPlaywrightAgentClientGlib(const WTF::String& proxyURI, const char* const* ignoreHosts)
+    : m_proxySettings(parseRawProxySettings(proxyURI, ignoreHosts))
+{
+}
+
+RefPtr<WebPageProxy> InspectorPlaywrightAgentClientGlib::createPage(WTF::String& error, const BrowserContext& browserContext)
+{
+    auto sessionID = browserContext.dataStore->sessionID();
+    WebKitWebContext* context = m_idToContext.get(sessionID);
+    if (!context && !browserContext.dataStore->isPersistent()) {
+        ASSERT_NOT_REACHED();
+        error = "Context with provided id not found"_s;
+        return nullptr;
+    }
+
+    RefPtr<WebPageProxy> page = webkitBrowserInspectorCreateNewPageInContext(context);
+    if (page == nullptr) {
+        error = "Failed to create new page in the context"_s;
+        return nullptr;
+    }
+
+    if (context == nullptr && sessionID != page->sessionID()) {
+        ASSERT_NOT_REACHED();
+        error = " Failed to create new page in default context"_s;
+        return nullptr;
+    }
+
+    return page;
+}
+
+void InspectorPlaywrightAgentClientGlib::closeBrowser()
+{
+    m_idToContext.clear();
+    webkitBrowserInspectorQuitApplication();
+    if (webkitWebContextExistingCount() > 1)
+        fprintf(stderr, "LEAK: %d contexts are still alive when closing browser\n", webkitWebContextExistingCount());
+}
+
+std::unique_ptr<BrowserContext> InspectorPlaywrightAgentClientGlib::createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList)
+{
+    GRefPtr<WebKitWebContext> context = adoptGRef(WEBKIT_WEB_CONTEXT(g_object_new(WEBKIT_TYPE_WEB_CONTEXT, nullptr)));
+    if (!context) {
+        error = "Failed to create GLib ephemeral context"_s;
+        return nullptr;
+    }
+
+    GRefPtr<WebKitNetworkSession> networkSession = adoptGRef(webkit_network_session_new_ephemeral());
+    webkit_web_context_set_network_session_for_automation(context.get(), networkSession.get());
+    GRefPtr<WebKitWebsiteDataManager> data_manager = webkit_network_session_get_website_data_manager(networkSession.get());
+
+    auto browserContext = std::make_unique<BrowserContext>();
+    browserContext->processPool = &webkitWebContextGetProcessPool(context.get());
+    browserContext->dataStore = &webkitWebsiteDataManagerGetDataStore(data_manager.get());
+    PAL::SessionID sessionID = browserContext.get()->dataStore->sessionID();
+    m_idToContext.set(sessionID, WTF::move(context));
+
+    if (!proxyServer.isEmpty()) {
+        WebCore::SoupNetworkProxySettings contextProxySettings = parseProxySettings(proxyServer, proxyBypassList);
+        browserContext->dataStore->setNetworkProxySettings(WTF::move(contextProxySettings));
+    } else {
+        browserContext->dataStore->setNetworkProxySettings(WebCore::SoupNetworkProxySettings(m_proxySettings));
+    }
+    return browserContext;
+}
+
+void InspectorPlaywrightAgentClientGlib::deleteBrowserContext(WTF::String& error, PAL::SessionID sessionID)
+{
+    m_idToContext.remove(sessionID);
+}
+
+void InspectorPlaywrightAgentClientGlib::takePageScreenshot(WebPageProxy& page, WebCore::IntRect&& clip, bool nominalResolution, CompletionHandler<void(const String&, const String&)>&& completionHandler)
+{
+    page.callAfterNextPresentationUpdate([protectedPage = Ref{ page }, clip = WTF::move(clip), nominalResolution, completionHandler = WTF::move(completionHandler)]() mutable {
+#if PLATFORM(GTK) || (PLATFORM(WPE) && USE(SKIA))
+        RefPtr<ViewSnapshot> viewSnapshot = protectedPage->pageClient()->takeViewSnapshot(WTF::move(clip), nominalResolution);
+        if (viewSnapshot) {
+            std::optional<String> data = WebAutomationSession::platformGetBase64EncodedPNGData(*viewSnapshot);
+            if (data) {
+                completionHandler(emptyString(), makeString("data:image/png;base64,"_s, *data));
+                return;
+            }
+        }
+#endif
+        completionHandler("Failed to take screenshot"_s, emptyString());
+    });
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.h b/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.h
new file mode 100644
index 0000000000000000000000000000000000000000..68bc7b610703bfcd3eff0d1c032092f6967fdc16
--- /dev/null
+++ b/Source/WebKit/UIProcess/glib/InspectorPlaywrightAgentClientGLib.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgentClient.h"
+#include <WebCore/SoupNetworkProxySettings.h>
+#include "WebKitWebContext.h"
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/glib/GRefPtr.h>
+#include <wtf/text/StringHash.h>
+
+namespace WebKit {
+
+class InspectorPlaywrightAgentClientGlib : public InspectorPlaywrightAgentClient {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgentClientGlib);
+public:
+    InspectorPlaywrightAgentClientGlib(const WTF::String& proxyURI, const char* const* ignoreHosts);
+    ~InspectorPlaywrightAgentClientGlib() override = default;
+
+    RefPtr<WebPageProxy> createPage(WTF::String& error, const BrowserContext&) override;
+    void closeBrowser() override;
+    std::unique_ptr<BrowserContext> createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList) override;
+    void deleteBrowserContext(WTF::String& error, PAL::SessionID) override;
+    void takePageScreenshot(WebPageProxy&, WebCore::IntRect&& clip, bool nominalResolution, CompletionHandler<void(const String&, const String&)>&& completionHandler) override;
+
+private:
+    WebKitWebContext* findContext(WTF::String& error, PAL::SessionID);
+
+    UncheckedKeyHashMap<PAL::SessionID, GRefPtr<WebKitWebContext>> m_idToContext;
+    WebCore::SoupNetworkProxySettings m_proxySettings;
+};
+
+} // namespace API
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/glib/WebProcessPoolGLib.cpp b/Source/WebKit/UIProcess/glib/WebProcessPoolGLib.cpp
index e69e33b4359e24075e9054f014f5e5ab488b78c7..f395398acf790cc4fa80122dd4f59381ee03f5ac 100644
--- a/Source/WebKit/UIProcess/glib/WebProcessPoolGLib.cpp
+++ b/Source/WebKit/UIProcess/glib/WebProcessPoolGLib.cpp
@@ -127,6 +127,8 @@ static OptionSet<AvailableInputDevices> availableInputDevices()
             return toAvailableInputDevices(gdk_seat_get_capabilities(seat));
     }
 #endif
+    if (!WebCore::screenHasTouchDeviceOverride() || !WebCore::screenHasTouchDeviceOverride().value())
+        return AvailableInputDevices::Mouse;
 #if ENABLE(TOUCH_EVENTS)
     return AvailableInputDevices::Touchscreen;
 #else
diff --git a/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.cpp b/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.cpp
index 3dd2a77a24c59cb7fb1f01d3a74d75267a0f36bf..a020ccc929af8c9130ecca0125e5229ee8670e54 100644
--- a/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.cpp
+++ b/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.cpp
@@ -864,4 +864,30 @@ RefPtr<NativeImage> AcceleratedBackingStore::bufferAsNativeImageForTesting() con
     return m_committedBuffer->asNativeImageForTesting();
 }
 
+// Playwright begin
+cairo_surface_t* AcceleratedBackingStore::surface()
+{
+    RefPtr<Buffer> buffer = m_committedBuffer.get();
+    if (!buffer)
+        return nullptr;
+
+    RefPtr<cairo_surface_t> surface = buffer->surface();
+    if (!surface)
+        return nullptr;
+
+    // The original surface is upside down, so we flip it to match orientation in other accelerated backing stores.
+    m_flippedSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, cairo_image_surface_get_width(surface.get()), cairo_image_surface_get_height(surface.get())));
+    {
+        RefPtr<cairo_t> cr = adoptRef(cairo_create(m_flippedSurface.get()));
+        cairo_matrix_t transform;
+        cairo_matrix_init(&transform, 1, 0, 0, -1, 0, cairo_image_surface_get_height(surface.get()) / buffer->deviceScaleFactor());
+        cairo_transform(cr.get(), &transform);
+        cairo_set_source_surface(cr.get(), surface.get(), 0, 0);
+        cairo_paint(cr.get());
+    }
+    cairo_surface_flush(m_flippedSurface.get());
+    return m_flippedSurface.get();
+}
+// Playwright end
+
 } // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.h b/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.h
index 2a15a005441f41bcc3a44ce666dabeab7ab671f2..cc802e0634696b9455cd650527886c35a14a3ea3 100644
--- a/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.h
+++ b/Source/WebKit/UIProcess/gtk/AcceleratedBackingStore.h
@@ -42,6 +42,7 @@
 #include <wtf/unix/UnixFileDescriptor.h>
 
 typedef void *EGLImage;
+typedef struct _cairo_surface cairo_surface_t;
 
 #if USE(GBM)
 #include <WebCore/DMABufBuffer.h>
@@ -86,6 +87,7 @@ public:
     void unrealize();
     RendererBufferDescription bufferDescription() const;
     RefPtr<WebCore::NativeImage> bufferAsNativeImageForTesting() const;
+    cairo_surface_t* surface();
 
 private:
     explicit AcceleratedBackingStore(WebPageProxy&);
@@ -268,6 +270,10 @@ private:
     RefPtr<Buffer> m_committedBuffer;
     Rects m_pendingDamageRects;
     HashMap<uint64_t, RefPtr<Buffer>> m_buffers;
+// Playwright begin
+    RefPtr<cairo_surface_t> m_flippedSurface;
+// Playwright end
+
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/InspectorTargetProxyGtk.cpp b/Source/WebKit/UIProcess/gtk/InspectorTargetProxyGtk.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8f661f8c62dc091670f9474db037e7eee0ec37ce
--- /dev/null
+++ b/Source/WebKit/UIProcess/gtk/InspectorTargetProxyGtk.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorTargetProxy.h"
+
+#include "WebPageProxy.h"
+#include "GtkUtilities.h"
+#include <gtk/gtk.h>
+
+namespace WebKit {
+
+void InspectorTargetProxy::platformActivate(String& error) const
+{
+    GtkWidget* parent = GTK_WIDGET(gtk_widget_get_root(m_page->viewWidget()));
+    if (WebCore::widgetIsOnscreenToplevelWindow(parent))
+        gtk_window_present(GTK_WINDOW(parent));
+    else
+        error = "The view is not on screen"_s;
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/PageInspectorTargetProxyGtk.cpp b/Source/WebKit/UIProcess/gtk/PageInspectorTargetProxyGtk.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4412881043189ba16e7803eeab98bce574ab9267
--- /dev/null
+++ b/Source/WebKit/UIProcess/gtk/PageInspectorTargetProxyGtk.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "PageInspectorTargetProxy.h"
+
+#include "WebPageProxy.h"
+#include "GtkUtilities.h"
+#include <gtk/gtk.h>
+
+namespace WebKit {
+
+void PageInspectorTargetProxy::platformActivate(String& error) const
+{
+    GtkWidget* parent = GTK_WIDGET(gtk_widget_get_root(m_page->viewWidget()));
+    if (widgetIsOnscreenToplevelWindow(parent))
+        gtk_window_present(GTK_WINDOW(parent));
+    else
+        error = "The view is not on screen"_s;
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/SystemSettingsManagerProxyGtk.cpp b/Source/WebKit/UIProcess/gtk/SystemSettingsManagerProxyGtk.cpp
index ed7f7adafd75f27ce458324b50144b28fb225565..3864cd324b918f97283a7d99dad753c84e3cb748 100644
--- a/Source/WebKit/UIProcess/gtk/SystemSettingsManagerProxyGtk.cpp
+++ b/Source/WebKit/UIProcess/gtk/SystemSettingsManagerProxyGtk.cpp
@@ -128,6 +128,8 @@ int SystemSettingsManagerProxy::xftDPI() const
 
 bool SystemSettingsManagerProxy::followFontSystemSettings() const
 {
+    // Align with WPE's behavior, which always returns false.
+    return false;
 #if USE(GTK4)
 #if GTK_CHECK_VERSION(4, 16, 0)
     GtkFontRendering fontRendering;
diff --git a/Source/WebKit/UIProcess/gtk/WebPageInspectorEmulationAgentGtk.cpp b/Source/WebKit/UIProcess/gtk/WebPageInspectorEmulationAgentGtk.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5dd29805ed464ae7641b44193caca700fa9f8a1e
--- /dev/null
+++ b/Source/WebKit/UIProcess/gtk/WebPageInspectorEmulationAgentGtk.cpp
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "DrawingAreaProxyCoordinatedGraphics.h"
+#include "WebPageInspectorEmulationAgent.h"
+#include "WebPageProxy.h"
+#include "GtkUtilities.h"
+#include "GtkVersioning.h"
+#include <WebCore/IntSize.h>
+#include <gtk/gtk.h>
+
+namespace WebKit {
+
+static bool windowHasManyTabs(GtkWidget* widget) {
+    for (GtkWidget* parent = gtk_widget_get_parent(widget); parent; parent = gtk_widget_get_parent(parent)) {
+        if (GTK_IS_NOTEBOOK(parent)) {
+            int pages = gtk_notebook_get_n_pages(GTK_NOTEBOOK(parent));
+            return pages > 1;
+        }
+    }
+    return false;
+}
+
+void WebPageInspectorEmulationAgent::platformSetSize(int width, int height, Function<void (const String& error)>&& callback)
+{
+    WebCore::IntSize viewSize(width, height);
+    GtkWidget* viewWidget = m_page.viewWidget();
+    GtkWidget* window = gtk_widget_get_toplevel(viewWidget);
+    if (!window) {
+        callback("Cannot find parent window"_s);
+        return;
+    }
+    if (!GTK_IS_WINDOW(window)) {
+        callback("Toplevel is not a window"_s);
+        return;
+    }
+    GtkAllocation viewAllocation;
+    gtk_widget_get_allocation(viewWidget, &viewAllocation);
+
+    // In GTK4 newly added tabs will have allocation size of 0x0, before the tab is shown.
+    // This is a Ctrl+click scenario. We invoke callback right away to not stall.
+    if (!viewAllocation.width && !viewAllocation.height && windowHasManyTabs(viewWidget)) {
+        callback(String());
+        return;
+    }
+
+    if (viewAllocation.width == width && viewAllocation.height == height) {
+        callback(String());
+        return;
+    }
+
+    GtkAllocation windowAllocation;
+    gtk_widget_get_allocation(window, &windowAllocation);
+
+    width += windowAllocation.width - viewAllocation.width;
+    height += windowAllocation.height - viewAllocation.height;
+
+    if (auto* drawingArea = static_cast<DrawingAreaProxyCoordinatedGraphics*>(m_page.drawingArea())) {
+        bool didNotHaveInitialAllocation = (!windowAllocation.width && !windowAllocation.height) ||
+            // Default size for new windows from browser_window_init in Tools/MiniBrowser/gtk/BrowserWindow.c.
+            (windowAllocation.width == 1024 && windowAllocation.height == 768);
+        // The callback can only be called if the page is still alive, so we can safely capture `this`.
+        drawingArea->waitForSizeUpdate([this, callback = WTF::move(callback), didNotHaveInitialAllocation, viewSize](const DrawingAreaProxyCoordinatedGraphics& drawingArea) mutable {
+            if (viewSize == drawingArea.size()) {
+                callback(String());
+                return;
+            }
+            if (didNotHaveInitialAllocation) {
+                // In gtk4 resize request may be lost (overridden by default one) if the window is not yet
+                // allocated when we are changing the size, so we try again.
+                platformSetSize(viewSize.width(), viewSize.height(), WTF::move(callback));
+                return;
+            }
+            callback("Failed to resize window"_s);
+        });
+    } else {
+        callback("No backing store for window"_s);
+    }
+    // Depending on whether default size has been applied or not, we need to
+    // do one of the calls, so we just do both.
+    gtk_window_set_default_size(GTK_WINDOW(window), width, height);
+    gtk_widget_set_size_request(window, width, height);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/WebPageInspectorInputAgentGtk.cpp b/Source/WebKit/UIProcess/gtk/WebPageInspectorInputAgentGtk.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..40355b2c69d7a94e924451b5fe1c0b96ff025663
--- /dev/null
+++ b/Source/WebKit/UIProcess/gtk/WebPageInspectorInputAgentGtk.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebPageInspectorInputAgent.h"
+
+#include "KeyBindingTranslator.h"
+#include "NativeWebKeyboardEvent.h"
+#include "WebPageProxy.h"
+#include <WebCore/PlatformKeyboardEvent.h>
+
+namespace WebKit {
+
+static unsigned modifiersToEventState(OptionSet<WebEventModifier> modifiers)
+{
+    unsigned state = 0;
+    if (modifiers.contains(WebEventModifier::ControlKey))
+        state |= GDK_CONTROL_MASK;
+    if (modifiers.contains(WebEventModifier::ShiftKey))
+        state |= GDK_SHIFT_MASK;
+    if (modifiers.contains(WebEventModifier::AltKey))
+        state |= GDK_META_MASK;
+    if (modifiers.contains(WebEventModifier::CapsLockKey))
+        state |= GDK_LOCK_MASK;
+    return state;
+}
+
+void WebPageInspectorInputAgent::platformDispatchKeyEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, Vector<String>& macCommands, MonotonicTime timestamp)
+{
+    Vector<String> commands;
+    const guint keyVal = WebKeyboardEvent::gdkKeyCodeForWindowsKeyCode(windowsVirtualKeyCode);
+    if (keyVal) {
+        unsigned state = modifiersToEventState(modifiers);
+        commands = KeyBindingTranslator().commandsForKeyval(keyVal, state);
+    }
+    NativeWebKeyboardEvent event(
+        type,
+        text,
+        unmodifiedText,
+        key,
+        code,
+        keyIdentifier,
+        windowsVirtualKeyCode,
+        nativeVirtualKeyCode,
+        isAutoRepeat,
+        isKeypad,
+        isSystemKey,
+        modifiers,
+        timestamp,
+        WTF::move(commands));
+    m_page.handleKeyboardEvent(event);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/gtk/WebPasteboardProxyGtk.cpp b/Source/WebKit/UIProcess/gtk/WebPasteboardProxyGtk.cpp
index baeb21c5cee36343d37fdf552cc36b26b2d5213e..d9efcdf56227966efafe53ba82c98673a47a9959 100644
--- a/Source/WebKit/UIProcess/gtk/WebPasteboardProxyGtk.cpp
+++ b/Source/WebKit/UIProcess/gtk/WebPasteboardProxyGtk.cpp
@@ -85,8 +85,10 @@ void WebPasteboardProxy::setPrimarySelectionOwner(WebFrameProxy* frame)
     if (m_primarySelectionOwner == frame)
         return;
 
-    if (m_primarySelectionOwner)
-        m_primarySelectionOwner->collapseSelection();
+// Playwright begin: do not change selection in another page!
+    // if (m_primarySelectionOwner)
+    //     m_primarySelectionOwner->collapseSelection();
+// Playwright end
 
     m_primarySelectionOwner = frame;
 }
diff --git a/Source/WebKit/UIProcess/mac/CorrectionPanel.h b/Source/WebKit/UIProcess/mac/CorrectionPanel.h
index 8afb6132fad823816f84328a8b0a1a514f998bf7..54b582e60f4b16b3c7ba038c8c52466cce9875c4 100644
--- a/Source/WebKit/UIProcess/mac/CorrectionPanel.h
+++ b/Source/WebKit/UIProcess/mac/CorrectionPanel.h
@@ -33,11 +33,10 @@
 #import <AppKit/NSSpellChecker.h>
 #import <WebCore/AlternativeTextClient.h>
 #import <wtf/RetainPtr.h>
+#import "WebViewImpl.h"
 
 namespace WebKit {
 
-class WebViewImpl;
-
 class CorrectionPanel {
 public:
     CorrectionPanel();
diff --git a/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.h b/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.h
new file mode 100644
index 0000000000000000000000000000000000000000..edb4581e8f1f484976a9081d37cb61e54b9b81c5
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "InspectorPlaywrightAgentClient.h"
+#include <wtf/Forward.h>
+
+OBJC_PROTOCOL(_WKBrowserInspectorDelegate);
+
+namespace WebKit {
+
+class InspectorPlaywrightAgentClientMac : public InspectorPlaywrightAgentClient {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgentClientMac);
+public:
+    InspectorPlaywrightAgentClientMac(_WKBrowserInspectorDelegate* delegate, bool headless);
+    ~InspectorPlaywrightAgentClientMac() override = default;
+
+    RefPtr<WebPageProxy> createPage(WTF::String& error, const BrowserContext&) override;
+    void closeBrowser() override;
+    std::unique_ptr<BrowserContext> createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList) override;
+    void deleteBrowserContext(WTF::String& error, PAL::SessionID) override;
+    void takePageScreenshot(WebPageProxy&, WebCore::IntRect&& clip, bool nominalResolution, CompletionHandler<void(const String&, const String&)>&& completionHandler) override;
+
+private:
+    _WKBrowserInspectorDelegate* delegate_;
+    bool headless_;
+};
+
+
+} // namespace API
diff --git a/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.mm b/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..409444cd94c22ff0662d786c95b04688ce2ea7b3
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/InspectorPlaywrightAgentClientMac.mm
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "InspectorPlaywrightAgentClientMac.h"
+
+#import "PageClient.h"
+#import "WebPageProxy.h"
+#import "WebProcessPool.h"
+#import "WebsiteDataStore.h"
+#import "_WKBrowserInspector.h"
+#import "WKProcessPoolInternal.h"
+#import "WKWebsiteDataStoreInternal.h"
+#import "WKWebView.h"
+#import "WKWebViewInternal.h"
+#import <WebCore/ImageUtilities.h>
+#import <wtf/RefPtr.h>
+#import <wtf/text/WTFString.h>
+
+namespace WebKit {
+
+InspectorPlaywrightAgentClientMac::InspectorPlaywrightAgentClientMac(_WKBrowserInspectorDelegate* delegate, bool headless)
+  : delegate_(delegate),
+    headless_(headless)
+{
+}
+
+RefPtr<WebPageProxy> InspectorPlaywrightAgentClientMac::createPage(WTF::String& error, const BrowserContext& browserContext)
+{
+    auto sessionID = browserContext.dataStore->sessionID();
+    WKWebView *webView = [delegate_ createNewPage:sessionID.toUInt64()];
+    if (!webView) {
+        error = "Internal error: can't create page in given context"_s;
+        return nil;
+    }
+    return [webView _page].get();
+}
+
+void InspectorPlaywrightAgentClientMac::closeBrowser()
+{
+    [delegate_ quit];
+}
+
+std::unique_ptr<BrowserContext> InspectorPlaywrightAgentClientMac::createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList)
+{
+    _WKBrowserContext* wkBrowserContext = [[delegate_ createBrowserContext:proxyServer.createNSString().get() WithBypassList:proxyBypassList.createNSString().get()] autorelease];
+    auto browserContext = std::make_unique<BrowserContext>();
+    browserContext->processPool = &static_cast<WebProcessPool&>([[wkBrowserContext processPool] _apiObject]);
+    browserContext->dataStore = &static_cast<WebsiteDataStore&>([[wkBrowserContext dataStore] _apiObject]);
+    return browserContext;
+}
+
+void InspectorPlaywrightAgentClientMac::deleteBrowserContext(WTF::String& error, PAL::SessionID sessionID)
+{
+    [delegate_ deleteBrowserContext:sessionID.toUInt64()];
+}
+
+void InspectorPlaywrightAgentClientMac::takePageScreenshot(WebPageProxy& page, WebCore::IntRect&& clipRect, bool, CompletionHandler<void(const String&, const String&)>&& completionHandler)
+{
+    int toolbarHeight = headless_ ? 0 : 59;
+    page.callAfterNextPresentationUpdate([protectedPage = Ref { page }, toolbarHeight, clipRect = WTF::move(clipRect), completionHandler = WTF::move(completionHandler)]() mutable {
+        RetainPtr<CGImageRef> imageRef = protectedPage->pageClient()->takeSnapshotForAutomation();
+        if (!imageRef) {
+            completionHandler("Could not take view snapshot"_s, emptyString());
+            return;
+        }
+
+        clipRect.move(0, toolbarHeight);
+        RetainPtr<CGImageRef> transformedImageRef = adoptCF(CGImageCreateWithImageInRect(imageRef.get(), clipRect));
+        completionHandler(emptyString(), WebCore::encodeDataURL(transformedImageRef.get(), "image/png"_s, std::nullopt));
+    });
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/mac/InspectorTargetProxyMac.mm b/Source/WebKit/UIProcess/mac/InspectorTargetProxyMac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..8adbd51bfecad2a273117588bf50f8f741850d14
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/InspectorTargetProxyMac.mm
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "InspectorTargetProxy.h"
+#import "WebPageProxy.h"
+
+#if PLATFORM(MAC)
+
+namespace WebKit {
+
+void InspectorTargetProxy::platformActivate(String& error) const
+{
+    NSWindow* window = m_page->platformWindow();
+    [window makeKeyAndOrderFront:nil];
+}
+
+} // namespace WebKit
+
+#endif
diff --git a/Source/WebKit/UIProcess/mac/PageClientImplMac.h b/Source/WebKit/UIProcess/mac/PageClientImplMac.h
index a621f334b3f1a1d2ea1c4bba63d73fa0757fe2bd..3d6b14a3a2a8a6f42f8da31b535e76715b6fe20a 100644
--- a/Source/WebKit/UIProcess/mac/PageClientImplMac.h
+++ b/Source/WebKit/UIProcess/mac/PageClientImplMac.h
@@ -31,9 +31,11 @@
 #include "PageClientImplCocoa.h"
 #include "WebFullScreenManagerProxy.h"
 #include <WebCore/DOMPasteAccess.h>
+#include <wtf/CheckedPtr.h>
 #include <wtf/CompletionHandler.h>
 #include <wtf/Forward.h>
 #include <wtf/WeakObjCPtr.h>
+#include <wtf/WeakPtr.h>
 
 @class WKEditorUndoTarget;
 @class WKView;
@@ -61,6 +63,8 @@ class PageClientImpl final : public PageClientImplCocoa
     WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(PageClientImpl);
 #endif
 public:
+    static void setHeadless(bool headless);
+
     PageClientImpl(NSView *, WKWebView *);
     virtual ~PageClientImpl();
 
@@ -177,6 +181,9 @@ private:
     void updateAcceleratedCompositingMode(const LayerTreeContext&) override;
     void didFirstLayerFlush(const LayerTreeContext&) override;
 
+// Paywright begin
+    RetainPtr<CGImageRef> takeSnapshotForAutomation() override;
+// Paywright end
     RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&) override;
     RefPtr<ViewSnapshot> takeViewSnapshot(std::optional<WebCore::IntRect>&&, ForceSoftwareCapturingViewportSnapshot) override;
     void wheelEventWasNotHandledByWebCore(const NativeWebWheelEvent&) override;
@@ -233,6 +240,10 @@ private:
     void beganExitFullScreen(const WebCore::IntRect& initialFrame, const WebCore::IntRect& finalFrame, CompletionHandler<void()>&&) override;
 #endif
 
+#if ENABLE(TOUCH_EVENTS)
+    void doneWithTouchEvent(const WebTouchEvent&, bool wasEventHandled) override;
+#endif
+
     void navigationGestureDidBegin() override;
     void navigationGestureWillEnd(bool willNavigate, WebBackForwardListItem&) override;
     void navigationGestureDidEnd(bool willNavigate, WebBackForwardListItem&) override;
diff --git a/Source/WebKit/UIProcess/mac/PageClientImplMac.mm b/Source/WebKit/UIProcess/mac/PageClientImplMac.mm
index 23ae9a262af01284fadc90a18436b77af5752c24..730af4dee8db0f9a5dcf34623d499f4619e0d83d 100644
--- a/Source/WebKit/UIProcess/mac/PageClientImplMac.mm
+++ b/Source/WebKit/UIProcess/mac/PageClientImplMac.mm
@@ -113,6 +113,13 @@ using namespace WebCore;
 
 WTF_MAKE_TZONE_ALLOCATED_IMPL(PageClientImpl);
 
+static bool _headless = false;
+
+// static
+void PageClientImpl::setHeadless(bool headless) {
+    _headless = headless;
+}
+
 PageClientImpl::PageClientImpl(NSView *view, WKWebView *webView)
     : PageClientImplCocoa(webView)
     , m_view(view)
@@ -172,6 +179,9 @@ NSWindow *PageClientImpl::activeWindow() const
 
 bool PageClientImpl::isViewWindowActive()
 {
+    if (_headless)
+        return true;
+
     ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer));
     RetainPtr activeViewWindow = activeWindow();
     return activeViewWindow.get().isKeyWindow || (activeViewWindow && [NSApp keyWindow] == activeViewWindow.get());
@@ -179,6 +189,9 @@ bool PageClientImpl::isViewWindowActive()
 
 bool PageClientImpl::isViewFocused()
 {
+    if (_headless)
+        return true;
+
     // FIXME: This is called from the WebPageProxy constructor before we have a WebViewImpl.
     // Once WebViewImpl and PageClient merge, this won't be a problem.
     if (CheckedPtr impl = m_impl.get())
@@ -202,6 +215,9 @@ void PageClientImpl::makeFirstResponder()
     
 bool PageClientImpl::isViewVisible(NSView *view, NSWindow *viewWindow) const
 {
+    if (_headless)
+        return true;
+
     auto windowIsOccluded = [&]()->bool {
         return m_impl && m_impl->windowOcclusionDetectionEnabled() && (viewWindow.occlusionState & NSWindowOcclusionStateVisible) != NSWindowOcclusionStateVisible;
     };
@@ -300,7 +316,8 @@ void PageClientImpl::didRelaunchProcess()
 
 void PageClientImpl::preferencesDidChange()
 {
-    protect(m_impl)->preferencesDidChange();
+    if (CheckedPtr impl = m_impl.get())
+        impl->preferencesDidChange();
 }
 
 void PageClientImpl::toolTipChanged(const String& oldToolTip, const String& newToolTip)
@@ -533,6 +550,8 @@ IntRect PageClientImpl::rootViewToAccessibilityScreen(const IntRect& rect)
 
 void PageClientImpl::doneWithKeyEvent(const NativeWebKeyboardEvent& event, bool eventWasHandled)
 {
+    if (!event.nativeEvent())
+        return;
     protect(m_impl)->doneWithKeyEvent(RetainPtr { event.nativeEvent() }.get(), eventWasHandled);
 }
 
@@ -552,6 +571,8 @@ void PageClientImpl::computeHasVisualSearchResults(const URL& imageURL, Shareabl
 
 RefPtr<WebPopupMenuProxy> PageClientImpl::createPopupMenuProxy(WebPageProxy& page)
 {
+    if (_headless)
+        return nullptr;
     return WebPopupMenuProxyMac::create(m_view.get().get(), protect(page.popupMenuClient()));
 }
 
@@ -677,6 +698,12 @@ CALayer *PageClientImpl::footerBannerLayer() const
     return m_impl->footerBannerLayer();
 }
 
+// Paywright begin
+RetainPtr<CGImageRef> PageClientImpl::takeSnapshotForAutomation() {
+    return m_impl->takeSnapshotForAutomation();
+}
+// Paywright begin
+
 RefPtr<ViewSnapshot> PageClientImpl::takeViewSnapshot(std::optional<WebCore::IntRect>&&)
 {
     return protect(m_impl)->takeViewSnapshot();
@@ -898,6 +925,13 @@ void PageClientImpl::beganExitFullScreen(const IntRect& initialFrame, const IntR
 
 #endif // ENABLE(FULLSCREEN_API)
 
+#if ENABLE(TOUCH_EVENTS)
+void PageClientImpl::doneWithTouchEvent(const WebTouchEvent& event, bool wasEventHandled)
+{
+    notImplemented();
+}
+#endif // ENABLE(TOUCH_EVENTS)
+
 void PageClientImpl::navigationGestureDidBegin()
 {
     protect(m_impl)->dismissContentRelativeChildWindowsWithAnimation(true);
@@ -1078,6 +1112,9 @@ void PageClientImpl::requestScrollToRect(const WebCore::FloatRect& targetRect, c
 
 bool PageClientImpl::windowIsFrontWindowUnderMouse(const NativeWebMouseEvent& event)
 {
+    // Simulated event.
+    if (!event.nativeEvent())
+        return false;
     return protect(m_impl)->windowIsFrontWindowUnderMouse(RetainPtr { event.nativeEvent() }.get());
 }
 
diff --git a/Source/WebKit/UIProcess/mac/PageInspectorTargetProxyMac.mm b/Source/WebKit/UIProcess/mac/PageInspectorTargetProxyMac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..cdeaad88feeb7c0d0d6ec485c73928030741904a
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/PageInspectorTargetProxyMac.mm
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "PageInspectorTargetProxy.h"
+#import "WebPageProxy.h"
+
+#if PLATFORM(MAC)
+
+namespace WebKit {
+
+void PageInspectorTargetProxy::platformActivate(String& error) const
+{
+    NSWindow* window = m_page->platformWindow();
+    [window makeKeyAndOrderFront:nil];
+}
+
+} // namespace WebKit
+
+#endif
diff --git a/Source/WebKit/UIProcess/mac/SecItemShimProxy.messages.in b/Source/WebKit/UIProcess/mac/SecItemShimProxy.messages.in
index f46895285dbc84c624537a194814c18f771a0c08..29ef9e5afa13b8d2b47b7f2dd4ce37846b61c35f 100644
--- a/Source/WebKit/UIProcess/mac/SecItemShimProxy.messages.in
+++ b/Source/WebKit/UIProcess/mac/SecItemShimProxy.messages.in
@@ -20,6 +20,7 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#if ENABLE(SEC_ITEM_SHIM)
 [
     DispatchedFrom=Networking,
     DispatchedTo=UI,
@@ -27,9 +28,8 @@
 ]
 messages -> SecItemShimProxy {
 
-#if ENABLE(SEC_ITEM_SHIM)
     SecItemRequestSync(WebKit::SecItemRequestData request) -> (std::optional<WebKit::SecItemResponseData> response) Synchronous
     SecItemRequest(WebKit::SecItemRequestData request) -> (std::optional<WebKit::SecItemResponseData> response)
-#endif
 
 }
+#endif
diff --git a/Source/WebKit/UIProcess/mac/WKTextAnimationManagerMac.mm b/Source/WebKit/UIProcess/mac/WKTextAnimationManagerMac.mm
index 6cfc616d5492bd12f7516ff2d6a67e77705f42b0..fd2e2a98b1db2c469a7f18fb2b7cbfbdc8ea3a8b 100644
--- a/Source/WebKit/UIProcess/mac/WKTextAnimationManagerMac.mm
+++ b/Source/WebKit/UIProcess/mac/WKTextAnimationManagerMac.mm
@@ -35,6 +35,7 @@
 #import "WebViewImpl.h"
 #import <WebCore/NativeImage.h>
 #import <WebCore/TextAnimationTypes.h>
+#import <WebKit/WKWebView.h>
 #import <pal/cocoa/WritingToolsUISoftLink.h>
 
 @interface WKTextAnimationTypeEffectData : NSObject
diff --git a/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.h b/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.h
index d063c571127353548110ca306fabf076cae2c966..015f0932a0b9da6888365eb072f7c6d5d048b9bb 100644
--- a/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.h
+++ b/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.h
@@ -87,6 +87,7 @@ private:
     void show() override;
     void showContextMenuWithItems(Vector<Ref<WebContextMenuItem>>&&) override;
     void useContextMenuItems(Vector<Ref<WebContextMenuItem>>&&) override;
+    void hide() override;
 
     bool showAfterPostProcessingContextData();
 
diff --git a/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.mm b/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.mm
index 960f2529fe031dd6799c5d0d16ebf899089620e6..0a9e4684a6a149cffc4addc64b3b79bffc07211b 100644
--- a/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.mm
+++ b/Source/WebKit/UIProcess/mac/WebContextMenuProxyMac.mm
@@ -543,6 +543,12 @@ RetainPtr<NSMenuItem> WebContextMenuProxyMac::createShareMenuItem(ShareMenuItemT
 }
 #endif
 
+void WebContextMenuProxyMac::hide()
+{
+    if (m_menu)
+        [m_menu cancelTracking];
+}
+
 void WebContextMenuProxyMac::show()
 {
 #if ENABLE(SERVICE_CONTROLS)
diff --git a/Source/WebKit/UIProcess/mac/WebPageInspectorEmulationAgentMac.mm b/Source/WebKit/UIProcess/mac/WebPageInspectorEmulationAgentMac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..6113f4cd60a5d72b8ead61176cb43200803478ed
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/WebPageInspectorEmulationAgentMac.mm
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "WebPageInspectorEmulationAgent.h"
+
+#import "WebPageProxy.h"
+
+namespace WebKit {
+
+void WebPageInspectorEmulationAgent::platformSetSize(int width, int height, Function<void (const String& error)>&& callback)
+{
+    NSWindow* window = m_page.platformWindow();
+    NSRect windowRect = [window frame];
+    NSRect viewRect = window.contentLayoutRect;
+    windowRect.size.width += width - viewRect.size.width;
+    windowRect.size.height += height - viewRect.size.height;
+    [window setFrame:windowRect display:YES animate:NO];
+    callback(String());
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/mac/WebPageInspectorInputAgentMac.mm b/Source/WebKit/UIProcess/mac/WebPageInspectorInputAgentMac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..e6d3a8764ef084790a4ca4e9891b09ddcbb70781
--- /dev/null
+++ b/Source/WebKit/UIProcess/mac/WebPageInspectorInputAgentMac.mm
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import "NativeWebMouseEvent.h"
+#import "NetworkProcessMessages.h"
+#import "NetworkProcessProxy.h"
+#import "WebPageInspectorInputAgent.h"
+#import "WebPageProxy.h"
+#import "WebPageProxyMessages.h"
+#import "WebsiteDataStore.h"
+#import <WebCore/IntPoint.h>
+#import <WebCore/IntSize.h>
+#import "NativeWebKeyboardEvent.h"
+
+namespace WebKit {
+
+using namespace WebCore;
+
+void WebPageInspectorInputAgent::platformDispatchMouseEvent(const String& type, int x, int y, std::optional<int>&& optionalModifiers, const String& button, std::optional<int>&& optionalClickCount, unsigned short buttons) {
+    IntPoint locationInWindow(x, y);
+
+    NSEventModifierFlags modifiers = 0;
+    if (optionalModifiers) {
+        int inputModifiers = *optionalModifiers;
+        if (inputModifiers & 1)
+            modifiers |= NSEventModifierFlagShift;
+        if (inputModifiers & 2)
+            modifiers |= NSEventModifierFlagControl;
+        if (inputModifiers & 4)
+            modifiers |= NSEventModifierFlagOption;
+        if (inputModifiers & 8)
+            modifiers |= NSEventModifierFlagCommand;
+    }
+    int clickCount = optionalClickCount ? *optionalClickCount : 0;
+
+    NSTimeInterval timestamp = [NSDate timeIntervalSinceReferenceDate];
+    NSWindow *window = m_page.platformWindow();
+    NSInteger windowNumber = window.windowNumber;
+
+    NSEventType downEventType;
+    NSEventType dragEventType;
+    NSEventType upEventType;
+
+    if (!button || button == "none"_s) {
+        downEventType = NSEventTypeMouseMoved;
+        dragEventType = NSEventTypeMouseMoved;
+        upEventType = NSEventTypeMouseMoved;
+    } else if (button == "left"_s) {
+        downEventType = NSEventTypeLeftMouseDown;
+        dragEventType = NSEventTypeLeftMouseDragged;
+        upEventType = NSEventTypeLeftMouseUp;
+    } else if (button == "middle"_s) {
+        downEventType = NSEventTypeOtherMouseDown;
+        dragEventType = NSEventTypeOtherMouseDragged;
+        upEventType = NSEventTypeOtherMouseUp;
+    } else if (button == "right"_s) {
+        downEventType = NSEventTypeRightMouseDown;
+        dragEventType = NSEventTypeRightMouseDragged;
+        upEventType = NSEventTypeRightMouseUp;
+    } else {
+        return;
+    }
+
+    NSInteger eventNumber = 0;
+
+    NSEvent* event;
+    if (type == "move"_s) {
+        event = [NSEvent mouseEventWithType:dragEventType location:locationInWindow modifierFlags:modifiers timestamp:timestamp windowNumber:windowNumber context:nil eventNumber:eventNumber clickCount:clickCount pressure:0.0f];
+    } else if (type == "down"_s) {
+        event = [NSEvent mouseEventWithType:downEventType location:locationInWindow modifierFlags:modifiers timestamp:timestamp windowNumber:windowNumber context:nil eventNumber:eventNumber clickCount:clickCount pressure:WebCore::ForceAtClick];
+    } else if (type == "up"_s) {
+        event = [NSEvent mouseEventWithType:upEventType location:locationInWindow modifierFlags:modifiers timestamp:timestamp windowNumber:windowNumber context:nil eventNumber:eventNumber clickCount:clickCount pressure:0.0f];
+    } else {
+        return;
+    }
+
+    if (button == "middle"_s) {
+        CGEventRef cgEvent = [event CGEvent];
+        CGEventSetIntegerValueField(cgEvent, kCGMouseEventButtonNumber, kCGMouseButtonCenter);
+        event = [NSEvent eventWithCGEvent:cgEvent];
+    }
+
+    NativeWebMouseEvent nativeEvent(event, nil, [window contentView], WebKit::WebEventInputSource::UserDriven);
+    nativeEvent.playwrightSetButtons(buttons);
+    m_page.handleMouseEvent(nativeEvent);
+}
+
+void WebPageInspectorInputAgent::platformDispatchKeyEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, Vector<String>& commands, MonotonicTime timestamp)
+{
+    Vector<WebCore::KeypressCommand> macCommands;
+    for (const String& command : commands) {
+        m_page.registerKeypressCommandName(command);
+        macCommands.append(WebCore::KeypressCommand(command));
+    }
+    if (text.length() > 0 && macCommands.size() == 0)
+        macCommands.append(WebCore::KeypressCommand("insertText:"_s, text));
+    if (!macCommands.isEmpty())
+        if (auto replyID = m_page.grantAccessToCurrentPasteboardData(NSPasteboardNameGeneral, [] () { }))
+            protect(m_page.websiteDataStore().networkProcess())->connection().waitForAsyncReplyAndDispatchImmediately<Messages::NetworkProcess::AllowFilesAccessFromWebProcess>(*replyID, 100_ms);
+    NativeWebKeyboardEvent event(
+        type,
+        text,
+        unmodifiedText,
+        key,
+        code,
+        keyIdentifier,
+        windowsVirtualKeyCode,
+        nativeVirtualKeyCode,
+        isAutoRepeat,
+        isKeypad,
+        isSystemKey,
+        modifiers,
+        timestamp,
+        WTF::move(macCommands));
+    m_page.handleKeyboardEvent(event);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/mac/WebViewImpl.h b/Source/WebKit/UIProcess/mac/WebViewImpl.h
index 00f01a73b212bdc22a7da18c3ce1441735cec72f..ec0714a8b65d0323de74d09d039373059708f528 100644
--- a/Source/WebKit/UIProcess/mac/WebViewImpl.h
+++ b/Source/WebKit/UIProcess/mac/WebViewImpl.h
@@ -39,6 +39,7 @@
 #include "WKLayoutMode.h"
 #include "WebMouseEvent.h"
 #include <WebCore/DOMPasteAccess.h>
+#include <WebCore/FrameIdentifier.h>
 #include <WebCore/DigitalCredentialsRequestData.h>
 #include <WebCore/FocusDirection.h>
 #include <WebCore/HTMLMediaElementIdentifier.h>
@@ -615,6 +616,9 @@ public:
     void provideDataForPasteboard(NSPasteboard *, NSString *type);
     NSArray *namesOfPromisedFilesDroppedAtDestination(NSURL *dropDestination);
 
+// Paywright begin
+    RetainPtr<CGImageRef> takeSnapshotForAutomation();
+// Paywright end
     RefPtr<ViewSnapshot> takeViewSnapshot();
     RefPtr<ViewSnapshot> takeViewSnapshot(ForceSoftwareCapturingViewportSnapshot);
     void saveBackForwardSnapshotForCurrentItem();
diff --git a/Source/WebKit/UIProcess/mac/WebViewImpl.mm b/Source/WebKit/UIProcess/mac/WebViewImpl.mm
index 3899b38da4dab24c275d8ac5e17e5ad39c54501a..e473f92023b209565c7e558503d25b847947e918 100644
--- a/Source/WebKit/UIProcess/mac/WebViewImpl.mm
+++ b/Source/WebKit/UIProcess/mac/WebViewImpl.mm
@@ -2604,6 +2604,11 @@ WebCore::DestinationColorSpace WebViewImpl::colorSpace()
         if (!m_colorSpace)
             m_colorSpace = [NSColorSpace sRGBColorSpace];
     }
+    // Playwright begin
+    // window.colorSpace is sometimes null on popup windows in headless mode
+    if (!m_colorSpace)
+        return WebCore::DestinationColorSpace::SRGB();
+    // Playwright end
 
     ASSERT(m_colorSpace);
     return WebCore::DestinationColorSpace { [m_colorSpace CGColorSpace] };
@@ -5059,6 +5064,17 @@ static RetainPtr<CGImageRef> takeWindowSnapshot(CGSWindowID windowID, bool captu
     return WebCore::cgWindowListCreateImage(CGRectNull, kCGWindowListOptionIncludingWindow, windowID, imageOptions);
 }
 
+// Paywright begin
+RetainPtr<CGImageRef> WebViewImpl::takeSnapshotForAutomation() {
+    NSWindow *window = [m_view window];
+
+    CGSWindowID windowID = (CGSWindowID)window.windowNumber;
+    if (!windowID || !window.isVisible)
+        return nullptr;
+    return takeWindowSnapshot(windowID, true, ForceSoftwareCapturingViewportSnapshot::Yes);
+}
+// Paywright end
+
 RefPtr<ViewSnapshot> WebViewImpl::takeViewSnapshot()
 {
     return takeViewSnapshot(ForceSoftwareCapturingViewportSnapshot::No);
diff --git a/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.cpp b/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.cpp
index 2a5f7ebbd13e88c0141fb1a1b5212bafcedff04d..77bf2c0a74f5263dc85281b3eb261875b13ca332 100644
--- a/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.cpp
+++ b/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.cpp
@@ -35,6 +35,7 @@
 #include "MessageSenderInlines.h"
 #include "UpdateInfo.h"
 #include "WebPageProxy.h"
+#include "WebPageInspectorController.h"
 #include <WebCore/Region.h>
 
 namespace WebKit {
@@ -116,6 +117,19 @@ void DrawingAreaProxyWC::discardBackingStore()
     m_backingStore = std::nullopt;
 }
 
+void DrawingAreaProxyWC::captureFrame()
+{
+    if (!m_backingStore)
+        return;
+    auto surface = m_backingStore->surface();
+    if (!surface)
+        return;
+    auto image = surface->makeImageSnapshot();
+    if (!image)
+        return;
+    page()->inspectorController().didPaint(WTF::move(image));
+}
+
 } // namespace WebKit
 
 #endif // USE(GRAPHICS_LAYER_WC)
diff --git a/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.h b/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.h
index 5ede972f4b6efe213ccdd866ef77594acfcbf162..67f66b7c685eea3478b6386e1ec449d94dfff17f 100644
--- a/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.h
+++ b/Source/WebKit/UIProcess/wc/DrawingAreaProxyWC.h
@@ -50,6 +50,8 @@ public:
 
     void paint(PlatformPaintContextPtr, const WebCore::IntRect&, WebCore::Region& unpaintedRegion);
 
+    void captureFrame();
+
 private:
     DrawingAreaProxyWC(WebPageProxy&, WebProcessProxy&);
 
diff --git a/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.cpp b/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..01d4c66fc3c471ecf58a66e18512fc78d4465d8b
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorPlaywrightAgentClientWin.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "APIPageConfiguration.h"
+#include "APIProcessPoolConfiguration.h"
+#include "InspectorPlaywrightAgent.h"
+#include "WebPageProxy.h"
+#include "WebsiteDataStore.h"
+#include "WebPreferences.h"
+#include "WebProcessPool.h"
+#include "WebView.h"
+#include "WKAPICast.h"
+#include <WebCore/CurlProxySettings.h>
+#include <wtf/HashMap.h>
+#include <wtf/RefPtr.h>
+#include <wtf/text/StringView.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebKit {
+
+InspectorPlaywrightAgentClientWin::InspectorPlaywrightAgentClientWin(ConfigureDataStoreCallback configureDataStore, CreatePageCallback createPage, QuitCallback quit)
+    : m_configureDataStore(configureDataStore)
+    , m_createPage(createPage)
+    , m_quit(quit)
+{
+}
+
+RefPtr<WebPageProxy> InspectorPlaywrightAgentClientWin::createPage(WTF::String& error, const BrowserContext& context)
+{
+    auto conf = API::PageConfiguration::create();
+    conf->setProcessPool(context.processPool.get());
+    conf->setWebsiteDataStore(context.dataStore.get());
+    return toImpl(m_createPage(toAPI(&conf.get())));
+}
+
+void InspectorPlaywrightAgentClientWin::closeBrowser()
+{
+    m_quit();
+}
+
+std::unique_ptr<BrowserContext> InspectorPlaywrightAgentClientWin::createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList)
+{
+    auto config = API::ProcessPoolConfiguration::create();
+    auto browserContext = std::make_unique<BrowserContext>();
+    browserContext->processPool = WebKit::WebProcessPool::create(config);
+    browserContext->dataStore = WebKit::WebsiteDataStore::createNonPersistent();
+    m_configureDataStore(toAPI(browserContext->dataStore.get()));
+    if (!proxyServer.isEmpty()) {
+        URL proxyURL = URL(URL(), proxyServer);
+        WebCore::CurlProxySettings settings(WTF::move(proxyURL), String(proxyBypassList));
+        browserContext->dataStore->setNetworkProxySettings(WTF::move(settings));
+    }
+    return browserContext;
+}
+
+void InspectorPlaywrightAgentClientWin::deleteBrowserContext(WTF::String& error, PAL::SessionID sessionID)
+{
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.h b/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.h
new file mode 100644
index 0000000000000000000000000000000000000000..18be1f2e544e3069df48cdd1e55ad8536f57802a
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/InspectorPlaywrightAgentClientWin.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(REMOTE_INSPECTOR)
+
+#include "InspectorPlaywrightAgentClient.h"
+#include <WebKit/WKInspector.h>
+#include <wtf/Forward.h>
+#include <wtf/text/StringHash.h>
+
+typedef void (*ConfigureDataStoreCallback)(WKWebsiteDataStoreRef dataStore);
+typedef WKPageRef (*CreatePageCallback)(WKPageConfigurationRef configuration);
+typedef void (*QuitCallback)();
+
+namespace WebKit {
+
+class InspectorPlaywrightAgentClientWin : public InspectorPlaywrightAgentClient {
+    WTF_DEPRECATED_MAKE_FAST_ALLOCATED(InspectorPlaywrightAgentClientWin);
+public:
+    InspectorPlaywrightAgentClientWin(ConfigureDataStoreCallback, CreatePageCallback, QuitCallback);
+    ~InspectorPlaywrightAgentClientWin() override = default;
+
+    RefPtr<WebPageProxy> createPage(WTF::String& error, const BrowserContext&) override;
+    void closeBrowser() override;
+    std::unique_ptr<BrowserContext> createBrowserContext(WTF::String& error, const WTF::String& proxyServer, const WTF::String& proxyBypassList) override;
+    void deleteBrowserContext(WTF::String& error, PAL::SessionID) override;
+
+private:
+    ConfigureDataStoreCallback m_configureDataStore;
+    CreatePageCallback m_createPage;
+    QuitCallback m_quit;
+};
+
+} // namespace API
+
+#endif // ENABLE(REMOTE_INSPECTOR)
diff --git a/Source/WebKit/UIProcess/win/InspectorTargetProxyWin.cpp b/Source/WebKit/UIProcess/win/InspectorTargetProxyWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..135a60361fa8fbf907382625e7c8dd4ea64ceb94
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/InspectorTargetProxyWin.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InspectorTargetProxy.h"
+#include "WebPageProxy.h"
+
+namespace WebKit {
+
+void InspectorTargetProxy::platformActivate(String& error) const
+{
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/win/PageInspectorTargetProxyWin.cpp b/Source/WebKit/UIProcess/win/PageInspectorTargetProxyWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6469d95bbe7abe4c2dd77848e17462467eda78d0
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/PageInspectorTargetProxyWin.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "PageInspectorTargetProxy.h"
+#include "WebPageProxy.h"
+
+namespace WebKit {
+
+void PageInspectorTargetProxy::platformActivate(String& error) const
+{
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.cpp b/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.cpp
index 8017b507ce2f0d67922035b1d41b9898f5dddb8c..7e40f52a0e878aeaa0aa38199b432377a6dc4cfd 100644
--- a/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.cpp
+++ b/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.cpp
@@ -114,5 +114,11 @@ WebContextMenuProxyWin::~WebContextMenuProxyWin()
         ::DestroyMenu(m_menu);
 }
 
+void WebContextMenuProxyWin::hide()
+{
+    if (m_menu)
+        ::EndMenu();
+}
+
 } // namespace WebKit
 #endif // ENABLE(CONTEXT_MENUS)
diff --git a/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.h b/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.h
index ad633673cb4f1c5979aee23c0c3fd32f1b7421a2..2204867f7d2d6c756f17c968c1767ee667aca8c7 100644
--- a/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.h
+++ b/Source/WebKit/UIProcess/win/WebContextMenuProxyWin.h
@@ -47,6 +47,7 @@ public:
 private:
     WebContextMenuProxyWin(WebPageProxy&, FrameInfoData&&, ContextMenuContextData&&, const UserData&);
     void showContextMenuWithItems(Vector<Ref<WebContextMenuItem>>&&) override;
+    void hide() override;
 
     HMENU m_menu;
 };
diff --git a/Source/WebKit/UIProcess/win/WebPageInspectorEmulationAgentWin.cpp b/Source/WebKit/UIProcess/win/WebPageInspectorEmulationAgentWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..df55ee613ec085cb85ed12b45deff3a1b046861c
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/WebPageInspectorEmulationAgentWin.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebPageInspectorEmulationAgent.h"
+#include "WebPageProxy.h"
+
+namespace WebKit {
+
+void WebPageInspectorEmulationAgent::platformSetSize(int width, int height, Function<void (const String& error)>&& callback)
+{
+    HWND viewHwnd = reinterpret_cast<HWND>(m_page.viewWidget());
+    HWND windowHwnd = GetAncestor(viewHwnd, GA_ROOT);
+    RECT viewRect;
+    RECT windowRect;
+
+    if (!windowHwnd || !GetWindowRect(windowHwnd, &windowRect)) {
+        callback("Could not retrieve window size"_s);
+        return;
+    }
+    if (!GetWindowRect(viewHwnd, &viewRect)) {
+        callback("Could retrieve view size"_s);
+        return;
+    }
+
+    width += windowRect.right - windowRect.left - viewRect.right + viewRect.left;
+    height += windowRect.bottom - windowRect.top - viewRect.bottom + viewRect.top;
+
+    if (!SetWindowPos(windowHwnd, 0, 0, 0, width, height, SWP_NOCOPYBITS | SWP_NOSENDCHANGING | SWP_NOMOVE)) {
+        callback("Could not resize window"_s);
+        return;
+    }
+    callback(String());
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/win/WebPageInspectorInputAgentWin.cpp b/Source/WebKit/UIProcess/win/WebPageInspectorInputAgentWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..36fc7af8eb98b3f70d255ee858dccf580fae6679
--- /dev/null
+++ b/Source/WebKit/UIProcess/win/WebPageInspectorInputAgentWin.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include "config.h"
+#include "WebPageInspectorInputAgent.h"
+
+#include "NativeWebKeyboardEvent.h"
+#include "WebPageProxy.h"
+#include <WebCore/PlatformKeyboardEvent.h>
+
+namespace WebKit {
+
+void WebPageInspectorInputAgent::platformDispatchKeyEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, Vector<String>& macCommands, MonotonicTime timestamp)
+{
+    NativeWebKeyboardEvent event(
+        type,
+        text,
+        unmodifiedText,
+        key,
+        code,
+        keyIdentifier,
+        windowsVirtualKeyCode,
+        nativeVirtualKeyCode,
+        isAutoRepeat,
+        isKeypad,
+        isSystemKey,
+        modifiers,
+        timestamp);
+    m_page.handleKeyboardEvent(event);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/win/WebView.cpp b/Source/WebKit/UIProcess/win/WebView.cpp
index 0dab0688f2a24f27477f346e9f1c791763a10b86..003b1ef6c8e9c292b870076677d6cfd915858b05 100644
--- a/Source/WebKit/UIProcess/win/WebView.cpp
+++ b/Source/WebKit/UIProcess/win/WebView.cpp
@@ -570,7 +570,7 @@ LRESULT WebView::onSizeEvent(HWND hwnd, UINT, WPARAM, LPARAM lParam, bool& handl
     float intrinsicDeviceScaleFactor = deviceScaleFactorForWindow(hwnd);
     if (m_page)
         m_page->setIntrinsicDeviceScaleFactor(intrinsicDeviceScaleFactor);
-    m_viewSize = expandedIntSize(FloatSize(LOWORD(lParam), HIWORD(lParam)) / intrinsicDeviceScaleFactor);
+    m_viewSize = expandedIntSize(FloatSize(LOWORD(lParam), HIWORD(lParam)));
 
     if (m_page && m_page->drawingArea()) {
         // FIXME specify correctly layerPosition.
diff --git a/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.cpp b/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.cpp
index 0705d7a9536a44a09c410d9e0e14b99c7ce5623e..7c9d8a156147707740cd984c170271593dcdacbd 100644
--- a/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.cpp
+++ b/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.cpp
@@ -231,7 +231,7 @@ static Expected<SkImageInfo, String> getImageInfoFromBuffer(const  GRefPtr<WPEBu
     return makeUnexpected("Failed to extract snapshot pixel information"_s);
 }
 
-static Expected<Ref<ViewSnapshot>, String> saveBufferSnapshot(const GRefPtr<WPEBuffer>& buffer, std::optional<WebCore::IntRect>&& clipRect)
+static Expected<Ref<ViewSnapshot>, String> saveBufferSnapshot(const GRefPtr<WPEBuffer>& buffer, std::optional<WebCore::IntRect>&& clipRect, bool nominalResolution)
 {
     GUniqueOutPtr<GError> error;
     GBytes* pixels = wpe_buffer_import_to_pixels(buffer.get(), &error.outPtr());
@@ -249,33 +249,39 @@ static Expected<Ref<ViewSnapshot>, String> saveBufferSnapshot(const GRefPtr<WPEB
     if (!info)
         return makeUnexpected(info.error());
 
-    SkPixmap pixmap(info.value(), g_bytes_get_data(bytes.get(), nullptr), info->minRowBytes());
+    sk_sp<SkImage> fullScreenshot = SkImage::MakeRasterDirect(info, pixelsData, info->minRowBytes());
 
-    if (clipRect) {
-        SkIRect clippedRect = SkIRect::MakeXYWH(clipRect->x(), clipRect->y(), clipRect->width(), clipRect->height());
-        SkImageInfo clippedInfo = info->makeWH(clipRect->width(), clipRect->height());
-        SkPixmap clippedPixmap(info.value(), nullptr, clippedInfo.minRowBytes());
-        if (!pixmap.extractSubset(&clippedPixmap, clippedRect))
-            return makeUnexpected("Failed to extract clipped snapshot"_s);
-        pixmap = clippedPixmap;
-    }
-
-    auto image = SkImages::RasterFromPixmap(pixmap, [](const void*, void* context) {
-        g_bytes_unref(static_cast<GBytes*>(context));
-    }, bytes.leakRef());
+    float deviceScale = m_view.page().deviceScaleFactor();
+    if (!clipRect && (!nominalResolution || deviceScale == 1))
+        return { ViewSnapshot::create(WTF::move(fullScreenshot)) };
 
-    if (!image)
-        return makeUnexpected("Failed to create snapshot image"_s);
+    WebCore::IntSize size = clipRect ? clipRect->size() : m_view.page().viewSize();
+    if (!nominalResolution) {
+        size.scale(deviceScale);
+        if (clipRect)
+            clipRect->scale(deviceScale);
+    }
 
-    return { ViewSnapshot::create(WTF::move(image)) };
+    SkBitmap bitmap;
+    bitmap.allocPixels(SkImageInfo::Make(size.width(), size.height(), kN32_SkColorType, kPremul_SkAlphaType));
+    SkCanvas canvas(bitmap);
+    if (clipRect) {
+        canvas.translate(-clipRect->x(), -clipRect->y());
+        SkRect rect = SkRect::MakeXYWH(clipRect->x(), clipRect->y(), clipRect->width(), clipRect->height());
+        canvas.clipRect(rect);
+    }
+    if (nominalResolution)
+        canvas.scale(1/deviceScale, 1/deviceScale);
+    canvas.drawImage(fullScreenshot, 0, 0);
+    return { ViewSnapshot::create(WTF::move(bitmap.asImage())) };
 }
 
-Expected<Ref<ViewSnapshot>, String> AcceleratedBackingStore::takeSnapshot(std::optional<WebCore::IntRect>&& clipRect)
+Expected<Ref<ViewSnapshot>, String> AcceleratedBackingStore::takeSnapshot(std::optional<WebCore::IntRect>&& clipRect, bool nominalResolution)
 {
     if (!m_committedBuffer && !m_pendingBuffer) [[unlikely]]
         return makeUnexpected("No buffer to create snapshot from"_s);
 
-    return saveBufferSnapshot(m_committedBuffer ? m_committedBuffer : m_pendingBuffer, WTF::move(clipRect));
+    return saveBufferSnapshot(m_committedBuffer ? m_committedBuffer : m_pendingBuffer, WTF::move(clipRect), nominalResolution);
 }
 
 void AcceleratedBackingStore::renderPendingBuffer()
diff --git a/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.h b/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.h
index dcb02699a62caf8b79e21259287419b76bb71b77..905c613a2550fe4442666b35b393e75784405f07 100644
--- a/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.h
+++ b/Source/WebKit/UIProcess/wpe/AcceleratedBackingStore.h
@@ -73,7 +73,7 @@ public:
 
     void updateSurfaceID(uint64_t);
 
-    Expected<Ref<ViewSnapshot>, String> takeSnapshot(std::optional<WebCore::IntRect>&&);
+    Expected<Ref<ViewSnapshot>, String> takeSnapshot(std::optional<WebCore::IntRect>&&, bool nominalResolution);
 
     RendererBufferDescription bufferDescription() const;
 
diff --git a/Source/WebKit/UIProcess/wpe/PageInspectorTargetProxyWPE.cpp b/Source/WebKit/UIProcess/wpe/PageInspectorTargetProxyWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..912e1919a1e2a29ad221114ff312ef118d323093
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/PageInspectorTargetProxyWPE.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "PageInspectorTargetProxy.h"
+
+#include "WebPageProxy.h"
+#include <wpe/wpe.h>
+
+namespace WebKit {
+
+void PageInspectorTargetProxy::platformActivate(String& error) const
+{
+    struct wpe_view_backend* backend = m_page->viewBackend();
+    wpe_view_backend_add_activity_state(backend, wpe_view_activity_state_visible | wpe_view_activity_state_focused | wpe_view_activity_state_in_window);
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.cpp b/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b3c6d0a59daca4667ca8c709dad7816492389b47
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebColorPickerWPE.h"
+
+#include "WebPageProxy.h"
+
+namespace WebKit {
+using namespace WebCore;
+
+Ref<WebColorPickerWPE> WebColorPickerWPE::create(WebPageProxy& page, const Color& initialColor, const IntRect& rect, std::optional<WebCore::FrameIdentifier> frameID)
+{
+    return adoptRef(*new WebColorPickerWPE(page, initialColor, rect, frameID));
+}
+
+WebColorPickerWPE::WebColorPickerWPE(WebPageProxy& page, const Color& initialColor, const IntRect&, std::optional<WebCore::FrameIdentifier> frameID)
+    : WebColorPicker(&page.colorPickerClient(), frameID)
+{
+}
+
+WebColorPickerWPE::~WebColorPickerWPE()
+{
+    endPicker();
+}
+
+void WebColorPickerWPE::endPicker()
+{
+}
+
+void WebColorPickerWPE::showColorPicker(const Color& color, const IntRect&)
+{
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.h b/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.h
new file mode 100644
index 0000000000000000000000000000000000000000..7f588248e107a19f5b700fb8e0fe51d1c5cf5aac
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebColorPickerWPE.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2015 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WebColorPickerWPE_h
+#define WebColorPickerWPE_h
+
+#include "WebColorPicker.h"
+
+typedef struct _GtkColorChooser GtkColorChooser;
+
+namespace WebCore {
+class Color;
+class IntRect;
+}
+
+namespace WebKit {
+
+class WebColorPickerWPE : public WebColorPicker {
+public:
+    static Ref<WebColorPickerWPE> create(WebPageProxy&, const WebCore::Color&, const WebCore::IntRect&, std::optional<WebCore::FrameIdentifier> = std::nullopt);
+    virtual ~WebColorPickerWPE();
+
+    void endPicker() override;
+    void showColorPicker(const WebCore::Color&, const WebCore::IntRect&) override;
+
+protected:
+    WebColorPickerWPE(WebPageProxy&, const WebCore::Color&, const WebCore::IntRect&, std::optional<WebCore::FrameIdentifier> = std::nullopt);
+};
+
+} // namespace WebKit
+
+#endif // WebColorPickerWPE_h
diff --git a/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.cpp b/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c3ac81529d4dfb7070a9e1c30d4634eb10382713
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebDataListSuggestionsDropdownWPE.h"
+
+#include "WebPageProxy.h"
+#include <WebCore/DataListSuggestionInformation.h>
+
+namespace WebKit {
+
+WebDataListSuggestionsDropdownWPE::WebDataListSuggestionsDropdownWPE(WebPageProxy& page)
+    : WebDataListSuggestionsDropdown(page)
+{
+}
+
+WebDataListSuggestionsDropdownWPE::~WebDataListSuggestionsDropdownWPE()
+{
+}
+
+void WebDataListSuggestionsDropdownWPE::platformShow(WebCore::DataListSuggestionInformation&& information)
+{
+}
+
+void WebDataListSuggestionsDropdownWPE::handleKeydownWithIdentifier(const String& key)
+{
+}
+
+void WebDataListSuggestionsDropdownWPE::close()
+{
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.h b/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.h
new file mode 100644
index 0000000000000000000000000000000000000000..07a7cd3ab025616a41dc809e843a7f393b8e8e2f
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebDataListSuggestionsDropdownWPE.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2019 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "WebDataListSuggestionsDropdown.h"
+
+namespace WebKit {
+
+class WebPageProxy;
+
+class WebDataListSuggestionsDropdownWPE final : public WebDataListSuggestionsDropdown {
+public:
+    static Ref<WebDataListSuggestionsDropdown> create(WebPageProxy& page)
+    {
+        return adoptRef(*new WebDataListSuggestionsDropdownWPE(page));
+    }
+
+    ~WebDataListSuggestionsDropdownWPE();
+
+private:
+    WebDataListSuggestionsDropdownWPE(WebPageProxy&);
+
+    void platformShow(WebCore::DataListSuggestionInformation&&) final;
+    void handleKeydownWithIdentifier(const String&) final;
+    void close() final;
+};
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.cpp b/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a44463faf011fbab08f87bb7007a5e71c2a73758
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2020 Apple Inc. All rights reserved.
+ * Copyright (C) 2021 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebDateTimePickerWPE.h"
+
+#if ENABLE(DATE_AND_TIME_INPUT_TYPES)
+
+using namespace WebCore;
+
+namespace WebKit {
+
+Ref<WebDateTimePickerWPE> WebDateTimePickerWPE::create(WebPageProxy& page)
+{
+    return adoptRef(*new WebDateTimePickerWPE(page));
+}
+
+WebDateTimePickerWPE::~WebDateTimePickerWPE()
+{
+}
+
+WebDateTimePickerWPE::WebDateTimePickerWPE(WebPageProxy& page)
+    : WebDateTimePicker(page)
+{
+}
+
+void WebDateTimePickerWPE::showDateTimePicker(WebCore::DateTimeChooserParameters&& params)
+{
+}
+
+} // namespace WebKit
+
+#endif // ENABLE(DATE_AND_TIME_INPUT_TYPES)
diff --git a/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.h b/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.h
new file mode 100644
index 0000000000000000000000000000000000000000..0c0e3fce33b06ee72c4c29d2a4abe9644f4cc895
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebDateTimePickerWPE.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2020 Apple Inc. All rights reserved.
+ * Copyright (C) 2021 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(DATE_AND_TIME_INPUT_TYPES)
+
+#include "WebDateTimePicker.h"
+#include <WebCore/DateComponents.h>
+#include <WebCore/DateTimeChooserParameters.h>
+
+namespace WebKit {
+
+class WebDateTimePickerWPE final : public WebDateTimePicker {
+public:
+    static Ref<WebDateTimePickerWPE> create(WebPageProxy&);
+    ~WebDateTimePickerWPE();
+
+private:
+    WebDateTimePickerWPE(WebPageProxy&);
+
+    void showDateTimePicker(WebCore::DateTimeChooserParameters&&) final;
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(DATE_AND_TIME_INPUT_TYPES)
diff --git a/Source/WebKit/UIProcess/wpe/WebPageInspectorEmulationAgentWPE.cpp b/Source/WebKit/UIProcess/wpe/WebPageInspectorEmulationAgentWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..493c44f0051a748d6570070f8b169e0e781370f4
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebPageInspectorEmulationAgentWPE.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebPageInspectorEmulationAgent.h"
+
+#include "DrawingAreaProxyCoordinatedGraphics.h"
+#include "WebPageProxy.h"
+#include <wpe/wpe.h>
+
+namespace WebKit {
+
+void WebPageInspectorEmulationAgent::platformSetSize(int width, int height, Function<void (const String& error)>&& callback)
+{
+    WebCore::IntSize viewSize(width, height);
+    if (m_page.viewSize() == viewSize) {
+        callback(String());
+        return;
+    }
+
+    struct wpe_view_backend* backend = m_page.viewBackend();
+    wpe_view_backend_dispatch_set_size(backend, viewSize.width(), viewSize.height());
+    if (auto* drawingArea = static_cast<DrawingAreaProxyCoordinatedGraphics*>(m_page.drawingArea())) {
+        drawingArea->waitForSizeUpdate([callback = WTF::move(callback)](const DrawingAreaProxyCoordinatedGraphics&) mutable {
+            callback(String());
+        });
+    } else
+        callback(String());
+}
+
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebPageInspectorInputAgentWPE.cpp b/Source/WebKit/UIProcess/wpe/WebPageInspectorInputAgentWPE.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c6af56767484e2889208c96d454a0924f290ba9c
--- /dev/null
+++ b/Source/WebKit/UIProcess/wpe/WebPageInspectorInputAgentWPE.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 Microsoft Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebPageInspectorInputAgent.h"
+
+#include "NativeWebKeyboardEvent.h"
+#include "WebPageProxy.h"
+#include <WebCore/PlatformKeyboardEvent.h>
+#include <wpe/wpe.h>
+
+namespace WebKit {
+
+void WebPageInspectorInputAgent::platformDispatchKeyEvent(WebEventType type, const String& text, const String& unmodifiedText, const String& key, const String& code, const String& keyIdentifier, int windowsVirtualKeyCode, int nativeVirtualKeyCode, bool isAutoRepeat, bool isKeypad, bool isSystemKey, OptionSet<WebEventModifier> modifiers, Vector<String>& macCommands, MonotonicTime timestamp)
+{
+    NativeWebKeyboardEvent event(
+        type,
+        text,
+        unmodifiedText,
+        key,
+        code,
+        keyIdentifier,
+        windowsVirtualKeyCode,
+        nativeVirtualKeyCode,
+        isAutoRepeat,
+        isKeypad,
+        isSystemKey,
+        modifiers,
+        timestamp);
+    m_page.handleKeyboardEvent(event);
+}
+ 
+} // namespace WebKit
diff --git a/Source/WebKit/UIProcess/wpe/WebPreferencesWPE.cpp b/Source/WebKit/UIProcess/wpe/WebPreferencesWPE.cpp
index 9b688ad328317fea4fd96ce66e9714bad8f0f937..402a36a9c565e13ec298aa7f014f0d9208ebddb7 100644
--- a/Source/WebKit/UIProcess/wpe/WebPreferencesWPE.cpp
+++ b/Source/WebKit/UIProcess/wpe/WebPreferencesWPE.cpp
@@ -33,6 +33,10 @@ void WebPreferences::platformInitializeStore()
     setAcceleratedCompositingEnabled(true);
     setForceCompositingMode(true);
     setThreadedScrollingEnabled(true);
+
+    // Playwright override begin
+    setThreadedScrollingEnabled(false);
+    // Playwright override end
 }
 
 } // namespace WebKit
diff --git a/Source/WebKit/WebKit.xcodeproj/project.pbxproj b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
index 1b110e60239dfe1599a356d71f02b9bfe2e9a17c..1af727420f121f24a564e7756d41b51a3623f040 100644
--- a/Source/WebKit/WebKit.xcodeproj/project.pbxproj
+++ b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
@@ -1570,6 +1570,7 @@
 		5CABDC8722C40FED001EDE8E /* APIMessageListener.h in Headers */ = {isa = PBXBuildFile; fileRef = 5CABDC8322C40FA7001EDE8E /* APIMessageListener.h */; };
 		5CADDE05215046BD0067D309 /* WKWebProcess.h in Headers */ = {isa = PBXBuildFile; fileRef = 5C74300E21500492004BFA17 /* WKWebProcess.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		5CAECB6627465AE400AB78D0 /* UnifiedSource115.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 5CAECB5E27465AE300AB78D0 /* UnifiedSource115.cpp */; };
+		BF2C49ED7AD83CB7BC93CC92 /* UnifiedSource116.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1D7178FBC4EDB168CDB0B04D /* UnifiedSource116.cpp */; };
 		5CAF7AA726F93AB00003F19E /* adattributiond.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 5CAF7AA526F93A950003F19E /* adattributiond.cpp */; };
 		5CAFDE452130846300B1F7E1 /* _WKInspector.h in Headers */ = {isa = PBXBuildFile; fileRef = 5CAFDE422130843500B1F7E1 /* _WKInspector.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		5CAFDE472130846A00B1F7E1 /* _WKInspectorInternal.h in Headers */ = {isa = PBXBuildFile; fileRef = 5CAFDE442130843600B1F7E1 /* _WKInspectorInternal.h */; };
@@ -2393,6 +2394,18 @@
 		DF0C5F28252ECB8E00D921DB /* WKDownload.h in Headers */ = {isa = PBXBuildFile; fileRef = DF0C5F24252ECB8D00D921DB /* WKDownload.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		DF0C5F2A252ECB8E00D921DB /* WKDownloadDelegate.h in Headers */ = {isa = PBXBuildFile; fileRef = DF0C5F26252ECB8E00D921DB /* WKDownloadDelegate.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		DF0C5F2B252ED44000D921DB /* WKDownloadInternal.h in Headers */ = {isa = PBXBuildFile; fileRef = DF0C5F25252ECB8E00D921DB /* WKDownloadInternal.h */; };
+		D71A94322370E025002C4D9E /* InspectorPlaywrightAgentClientMac.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A94302370E025002C4D9E /* InspectorPlaywrightAgentClientMac.h */; };
+		D71A94342370E07A002C4D9E /* InspectorPlaywrightAgentClient.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A94332370E07A002C4D9E /* InspectorPlaywrightAgentClient.h */; };
+		D71A943A2370F061002C4D9E /* RemoteInspectorPipe.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A94392370F060002C4D9E /* RemoteInspectorPipe.h */; };
+		D71A94422371F67E002C4D9E /* WebPageInspectorEmulationAgent.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A943F2371F67E002C4D9E /* WebPageInspectorEmulationAgent.h */; };
+		D71A94432371F67E002C4D9E /* WebPageInspectorInputAgent.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A94402371F67E002C4D9E /* WebPageInspectorInputAgent.h */; };
+		D71A944A2372290B002C4D9E /* _WKBrowserInspector.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A94492372290B002C4D9E /* _WKBrowserInspector.h */; settings = {ATTRIBUTES = (Private, ); }; };
+		D71A944C237239FB002C4D9E /* BrowserInspectorPipe.h in Headers */ = {isa = PBXBuildFile; fileRef = D71A944B237239FB002C4D9E /* BrowserInspectorPipe.h */; };
+		D76D6888238DBD81008D314B /* InspectorDialogAgent.h in Headers */ = {isa = PBXBuildFile; fileRef = D76D6887238DBD80008D314B /* InspectorDialogAgent.h */; };
+		D79902B1236E9404005D6F7E /* WebPageInspectorEmulationAgentMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = D79902AE236E9404005D6F7E /* WebPageInspectorEmulationAgentMac.mm */; };
+		D79902B2236E9404005D6F7E /* PageInspectorTargetProxyMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = D79902AF236E9404005D6F7E /* PageInspectorTargetProxyMac.mm */; };
+		D79902B3236E9404005D6F7E /* WebPageInspectorInputAgentMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = D79902B0236E9404005D6F7E /* WebPageInspectorInputAgentMac.mm */; };
+		D7EB04E72372A73B00F744CE /* InspectorPlaywrightAgentClientMac.mm in Sources */ = {isa = PBXBuildFile; fileRef = D7EB04E62372A73B00F744CE /* InspectorPlaywrightAgentClientMac.mm */; };
 		DF462E0F23F22F5500EFF35F /* WKHTTPCookieStorePrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = DF462E0E23F22F5300EFF35F /* WKHTTPCookieStorePrivate.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		DF462E1223F338BE00EFF35F /* WKContentWorldPrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = DF462E1123F338AD00EFF35F /* WKContentWorldPrivate.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		DF7A231C291B088D00B98DF3 /* WKSnapshotConfigurationPrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = DF7A231B291B088D00B98DF3 /* WKSnapshotConfigurationPrivate.h */; settings = {ATTRIBUTES = (Private, ); }; };
@@ -2500,6 +2513,8 @@
 		E5BEF6822130C48000F31111 /* WebDataListSuggestionsDropdownIOS.h in Headers */ = {isa = PBXBuildFile; fileRef = E5BEF6802130C47F00F31111 /* WebDataListSuggestionsDropdownIOS.h */; };
 		E5CB07DC20E1678F0022C183 /* WKFormColorControl.h in Headers */ = {isa = PBXBuildFile; fileRef = E5CB07DA20E1678F0022C183 /* WKFormColorControl.h */; };
 		E5CBA76427A318E100DF7858 /* UnifiedSource120.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA75F27A3187800DF7858 /* UnifiedSource120.cpp */; };
+		E5CBA77427A318E100DF7858 /* UnifiedSource121.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA76F27A3187800DF7858 /* UnifiedSource121.cpp */; };
+		E5CBA78427A318E100DF7858 /* UnifiedSource122.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA77F27A3187800DF7858 /* UnifiedSource122.cpp */; };
 		E5CBA76527A318E100DF7858 /* UnifiedSource118.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA76127A3187900DF7858 /* UnifiedSource118.cpp */; };
 		E5CBA76627A318E100DF7858 /* UnifiedSource116.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA76327A3187B00DF7858 /* UnifiedSource116.cpp */; };
 		E5CBA76727A318E100DF7858 /* UnifiedSource119.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E5CBA76027A3187900DF7858 /* UnifiedSource119.cpp */; };
@@ -2546,6 +2561,8 @@
 		F3EEEE592DB318270038CC1D /* BidiBrowserAgent.h in Headers */ = {isa = PBXBuildFile; fileRef = F3EEEE572DB318270038CC1D /* BidiBrowserAgent.h */; };
 		F3EEEE5A2DB318270038CC1D /* BidiBrowserAgent.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F3EEEE582DB318270038CC1D /* BidiBrowserAgent.cpp */; };
 		F404455C2D5CFB56000E587E /* AppKitSoftLink.h in Headers */ = {isa = PBXBuildFile; fileRef = F404455A2D5CFB56000E587E /* AppKitSoftLink.h */; };
+		F33C7AC7249AD79C0018BE41 /* libwebrtc.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = F33C7AC6249AD79C0018BE41 /* libwebrtc.dylib */; };
+		F3867F0A24607D4E008F0F31 /* InspectorScreencastAgent.h in Headers */ = {isa = PBXBuildFile; fileRef = F3867F0424607D2B008F0F31 /* InspectorScreencastAgent.h */; };
 		F409BA181E6E64BC009DA28E /* WKDragDestinationAction.h in Headers */ = {isa = PBXBuildFile; fileRef = F409BA171E6E64B3009DA28E /* WKDragDestinationAction.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		F40C3B712AB401C5007A3567 /* WKDatePickerPopoverController.h in Headers */ = {isa = PBXBuildFile; fileRef = F40C3B6F2AB40167007A3567 /* WKDatePickerPopoverController.h */; };
 		F41145682CD939E0004CDBD1 /* _WKTouchEventGenerator.h in Headers */ = {isa = PBXBuildFile; fileRef = F41145652CD939E0004CDBD1 /* _WKTouchEventGenerator.h */; settings = {ATTRIBUTES = (Private, ); }; };
@@ -6721,6 +6738,7 @@
 		5CABDC8522C40FCC001EDE8E /* WKMessageListener.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKMessageListener.h; sourceTree = "<group>"; };
 		5CABE07A28F60E8A00D83FD9 /* WebPushMessage.serialization.in */ = {isa = PBXFileReference; lastKnownFileType = text; path = WebPushMessage.serialization.in; sourceTree = "<group>"; };
 		5CADDE0D2151AA010067D309 /* AuthenticationChallengeDisposition.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AuthenticationChallengeDisposition.h; sourceTree = "<group>"; };
+		1D7178FBC4EDB168CDB0B04D /* UnifiedSource116.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = UnifiedSource116.cpp; sourceTree = "<group>"; };
 		5CAECB5E27465AE300AB78D0 /* UnifiedSource115.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = UnifiedSource115.cpp; sourceTree = "<group>"; };
 		5CAF7AA426F93A750003F19E /* adattributiond */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = adattributiond; sourceTree = BUILT_PRODUCTS_DIR; };
 		5CAF7AA526F93A950003F19E /* adattributiond.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = adattributiond.cpp; sourceTree = "<group>"; };
@@ -8553,6 +8571,19 @@
 		DF0C5F24252ECB8D00D921DB /* WKDownload.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKDownload.h; sourceTree = "<group>"; };
 		DF0C5F25252ECB8E00D921DB /* WKDownloadInternal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKDownloadInternal.h; sourceTree = "<group>"; };
 		DF0C5F26252ECB8E00D921DB /* WKDownloadDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKDownloadDelegate.h; sourceTree = "<group>"; };
+		D71A942C2370DF81002C4D9E /* WKBrowserInspector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKBrowserInspector.h; sourceTree = "<group>"; };
+		D71A94302370E025002C4D9E /* InspectorPlaywrightAgentClientMac.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorPlaywrightAgentClientMac.h; sourceTree = "<group>"; };
+		D71A94332370E07A002C4D9E /* InspectorPlaywrightAgentClient.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorPlaywrightAgentClient.h; sourceTree = "<group>"; };
+		D71A94392370F060002C4D9E /* RemoteInspectorPipe.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RemoteInspectorPipe.h; sourceTree = "<group>"; };
+		D71A943F2371F67E002C4D9E /* WebPageInspectorEmulationAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebPageInspectorEmulationAgent.h; sourceTree = "<group>"; };
+		D71A94402371F67E002C4D9E /* WebPageInspectorInputAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebPageInspectorInputAgent.h; sourceTree = "<group>"; };
+		D71A94492372290B002C4D9E /* _WKBrowserInspector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = _WKBrowserInspector.h; sourceTree = "<group>"; };
+		D71A944B237239FB002C4D9E /* BrowserInspectorPipe.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BrowserInspectorPipe.h; sourceTree = "<group>"; };
+		D76D6887238DBD80008D314B /* InspectorDialogAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorDialogAgent.h; sourceTree = "<group>"; };
+		D79902AE236E9404005D6F7E /* WebPageInspectorEmulationAgentMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WebPageInspectorEmulationAgentMac.mm; sourceTree = "<group>"; };
+		D79902AF236E9404005D6F7E /* PageInspectorTargetProxyMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = PageInspectorTargetProxyMac.mm; sourceTree = "<group>"; };
+		D79902B0236E9404005D6F7E /* WebPageInspectorInputAgentMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WebPageInspectorInputAgentMac.mm; sourceTree = "<group>"; };
+		D7EB04E62372A73B00F744CE /* InspectorPlaywrightAgentClientMac.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = InspectorPlaywrightAgentClientMac.mm; sourceTree = "<group>"; };
 		DF462E0E23F22F5300EFF35F /* WKHTTPCookieStorePrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKHTTPCookieStorePrivate.h; sourceTree = "<group>"; };
 		DF462E1123F338AD00EFF35F /* WKContentWorldPrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKContentWorldPrivate.h; sourceTree = "<group>"; };
 		DF58C6311371AC5800F9A37C /* NativeWebWheelEvent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = NativeWebWheelEvent.h; sourceTree = "<group>"; };
@@ -8748,6 +8779,8 @@
 		E5CBA76127A3187900DF7858 /* UnifiedSource118.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = UnifiedSource118.cpp; sourceTree = "<group>"; };
 		E5CBA76227A3187900DF7858 /* UnifiedSource117.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = UnifiedSource117.cpp; sourceTree = "<group>"; };
 		E5CBA76327A3187B00DF7858 /* UnifiedSource116.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = UnifiedSource116.cpp; sourceTree = "<group>"; };
+		E5CBA76F27A3187800DF7858 /* UnifiedSource121.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = UnifiedSource121.cpp; sourceTree = "<group>"; };
+		E5CBA77F27A3187800DF7858 /* UnifiedSource122.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = UnifiedSource122.cpp; sourceTree = "<group>"; };
 		E5DEFA6726F8F42600AB68DB /* PhotosUISPI.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = PhotosUISPI.h; sourceTree = "<group>"; };
 		E838FCAF2DE90BF800703353 /* ISO18013MobileDocumentRequest+Extras.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "ISO18013MobileDocumentRequest+Extras.swift"; sourceTree = "<group>"; };
 		E88885662DC914C400C572B8 /* WKISO18013Request.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WKISO18013Request.h; sourceTree = "<group>"; };
@@ -8812,6 +8845,9 @@
 		F404455A2D5CFB56000E587E /* AppKitSoftLink.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AppKitSoftLink.h; sourceTree = "<group>"; };
 		F404455B2D5CFB56000E587E /* AppKitSoftLink.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = AppKitSoftLink.mm; sourceTree = "<group>"; };
 		F4063DDE2D71481E00F3FE6E /* LLVMProfiling.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = LLVMProfiling.h; sourceTree = "<group>"; };
+		F33C7AC6249AD79C0018BE41 /* libwebrtc.dylib */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.dylib"; path = libwebrtc.dylib; sourceTree = BUILT_PRODUCTS_DIR; };
+		F3867F0324607D2B008F0F31 /* InspectorScreencastAgent.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = InspectorScreencastAgent.cpp; sourceTree = "<group>"; };
+		F3867F0424607D2B008F0F31 /* InspectorScreencastAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorScreencastAgent.h; sourceTree = "<group>"; };
 		F409BA171E6E64B3009DA28E /* WKDragDestinationAction.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKDragDestinationAction.h; sourceTree = "<group>"; };
 		F40C3B6F2AB40167007A3567 /* WKDatePickerPopoverController.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WKDatePickerPopoverController.h; sourceTree = "<group>"; };
 		F40C3B702AB40167007A3567 /* WKDatePickerPopoverController.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = WKDatePickerPopoverController.mm; sourceTree = "<group>"; };
@@ -9345,6 +9381,7 @@
 				3766F9EE189A1241003CF19B /* JavaScriptCore.framework in Frameworks */,
 				3766F9F1189A1254003CF19B /* libicucore.dylib in Frameworks */,
 				7B9FC5BB28A5233B007570E7 /* libWebKitPlatform.a in Frameworks */,
+				F33C7AC7249AD79C0018BE41 /* libwebrtc.dylib in Frameworks */,
 				3766F9EF189A1244003CF19B /* QuartzCore.framework in Frameworks */,
 				37694525184FC6B600CDE21F /* Security.framework in Frameworks */,
 				37BEC4DD1948FC6A008B4286 /* WebCore.framework in Frameworks */,
@@ -12710,6 +12747,7 @@
 				99788ACA1F421DCA00C08000 /* _WKAutomationSessionConfiguration.mm */,
 				990D28A81C6404B000986977 /* _WKAutomationSessionDelegate.h */,
 				990D28AF1C65203900986977 /* _WKAutomationSessionInternal.h */,
+				D71A94492372290B002C4D9E /* _WKBrowserInspector.h */,
 				5C4609E222430E4C009943C2 /* _WKContentRuleListAction.h */,
 				5C4609E322430E4D009943C2 /* _WKContentRuleListAction.mm */,
 				5C4609E422430E4D009943C2 /* _WKContentRuleListActionInternal.h */,
@@ -14517,6 +14555,7 @@
 				E34B110C27C46BC6006D2F2E /* libWebCoreTestShim.dylib */,
 				E34B110F27C46D09006D2F2E /* libWebCoreTestSupport.dylib */,
 				DDE992F4278D06D900F60D26 /* libWebKitAdditions.a */,
+				F33C7AC6249AD79C0018BE41 /* libwebrtc.dylib */,
 				57A9FF15252C6AEF006A2040 /* libWTF.a */,
 				5750F32A2032D4E500389347 /* LocalAuthentication.framework */,
 				570DAAB0230273D200E8FC04 /* NearField.framework */,
@@ -15117,6 +15156,8 @@
 			children = (
 				9197940423DBC4BB00257892 /* InspectorBrowserAgent.cpp */,
 				9197940323DBC4BB00257892 /* InspectorBrowserAgent.h */,
+				F3867F0324607D2B008F0F31 /* InspectorScreencastAgent.cpp */,
+				F3867F0424607D2B008F0F31 /* InspectorScreencastAgent.h */,
 			);
 			path = Agents;
 			sourceTree = "<group>";
@@ -15932,6 +15973,7 @@
 				E1513C65166EABB200149FCB /* AuxiliaryProcessProxy.h */,
 				46A2B6061E5675A200C3DEDA /* BackgroundProcessResponsivenessTimer.cpp */,
 				46A2B6071E5675A200C3DEDA /* BackgroundProcessResponsivenessTimer.h */,
+				D71A944B237239FB002C4D9E /* BrowserInspectorPipe.h */,
 				5C6D69352AC3935D0099BDAF /* BrowsingContextGroup.cpp */,
 				5C6D69362AC3935D0099BDAF /* BrowsingContextGroup.h */,
 				5CA98549210BEB5A0057EB6B /* BrowsingWarning.h */,
@@ -15962,6 +16004,8 @@
 				BC06F43912DBCCFB002D78DE /* GeolocationPermissionRequestProxy.cpp */,
 				BC06F43812DBCCFB002D78DE /* GeolocationPermissionRequestProxy.h */,
 				2DD5A72A1EBF09A7009BA597 /* HiddenPageThrottlingAutoIncreasesCounter.h */,
+				D76D6887238DBD80008D314B /* InspectorDialogAgent.h */,
+				D71A94332370E07A002C4D9E /* InspectorPlaywrightAgentClient.h */,
 				5CEABA2B2333251400797797 /* LegacyGlobalSettings.cpp */,
 				5CEABA2A2333247700797797 /* LegacyGlobalSettings.h */,
 				31607F3819627002009B87DA /* LegacySessionStateCoding.h */,
@@ -15992,6 +16036,7 @@
 				4683569B21E81CC7006E27A3 /* ProvisionalPageProxy.cpp */,
 				4683569A21E81CC7006E27A3 /* ProvisionalPageProxy.h */,
 				411B89CB27B2B89600F9EBD3 /* QueryPermissionResultCallback.h */,
+				D71A94392370F060002C4D9E /* RemoteInspectorPipe.h */,
 				5CCB54DC2A4FEA6A0005FAA8 /* RemotePageDrawingAreaProxy.cpp */,
 				5CCB54DB2A4FEA6A0005FAA8 /* RemotePageDrawingAreaProxy.h */,
 				FABBBC802D35AC6800820017 /* RemotePageFullscreenManagerProxy.cpp */,
@@ -16113,6 +16158,8 @@
 				BC7B6204129A0A6700D174A4 /* WebPageGroup.h */,
 				2D9EA3101A96D9EB002D2807 /* WebPageInjectedBundleClient.cpp */,
 				2D9EA30E1A96CBFF002D2807 /* WebPageInjectedBundleClient.h */,
+				D71A943F2371F67E002C4D9E /* WebPageInspectorEmulationAgent.h */,
+				D71A94402371F67E002C4D9E /* WebPageInspectorInputAgent.h */,
 				9B7F8A502C785725000057F3 /* WebPageLoadTiming.h */,
 				BC111B0B112F5E4F00337BAB /* WebPageProxy.cpp */,
 				BC032DCB10F4389F0058C15A /* WebPageProxy.h */,
@@ -16307,6 +16354,7 @@
 				BC646C1911DD399F006455B0 /* WKBackForwardListItemRef.h */,
 				BC646C1611DD399F006455B0 /* WKBackForwardListRef.cpp */,
 				BC646C1711DD399F006455B0 /* WKBackForwardListRef.h */,
+				D71A942C2370DF81002C4D9E /* WKBrowserInspector.h */,
 				BCB9E24A1120E15C00A137E0 /* WKContext.cpp */,
 				BCB9E2491120E15C00A137E0 /* WKContext.h */,
 				1AE52F9319201F6B00A1FA37 /* WKContextConfigurationRef.cpp */,
@@ -16890,8 +16938,11 @@
 				B878B613133428DC006888E9 /* CorrectionPanel.h */,
 				B878B614133428DC006888E9 /* CorrectionPanel.mm */,
 				7AFA6F682A9F57C50055322A /* DisplayLinkMac.cpp */,
+				D71A94302370E025002C4D9E /* InspectorPlaywrightAgentClientMac.h */,
+				D7EB04E62372A73B00F744CE /* InspectorPlaywrightAgentClientMac.mm */,
 				0FCB4E5818BBE3D9000FCFC9 /* PageClientImplMac.h */,
 				0FCB4E5918BBE3D9000FCFC9 /* PageClientImplMac.mm */,
+				D79902AF236E9404005D6F7E /* PageInspectorTargetProxyMac.mm */,
 				E18E6909169B563F009B6670 /* SecItemShimProxy.cpp */,
 				E18E690A169B563F009B6670 /* SecItemShimProxy.h */,
 				E18E690D169B57DF009B6670 /* SecItemShimProxy.messages.in */,
@@ -16911,6 +16962,8 @@
 				E568B92120A3AC6A00E3C856 /* WebDataListSuggestionsDropdownMac.mm */,
 				E55CD20124D09F1F0042DB9C /* WebDateTimePickerMac.h */,
 				E55CD20224D09F1F0042DB9C /* WebDateTimePickerMac.mm */,
+				D79902AE236E9404005D6F7E /* WebPageInspectorEmulationAgentMac.mm */,
+				D79902B0236E9404005D6F7E /* WebPageInspectorInputAgentMac.mm */,
 				BC857E8512B71EBB00EDEB2E /* WebPageProxyMac.mm */,
 				BC5750951268F3C6006F0F12 /* WebPopupMenuProxyMac.h */,
 				BC5750961268F3C6006F0F12 /* WebPopupMenuProxyMac.mm */,
@@ -17739,6 +17792,7 @@
 				99788ACB1F421DDA00C08000 /* _WKAutomationSessionConfiguration.h in Headers */,
 				990D28AC1C6420CF00986977 /* _WKAutomationSessionDelegate.h in Headers */,
 				990D28B11C65208D00986977 /* _WKAutomationSessionInternal.h in Headers */,
+				D71A944A2372290B002C4D9E /* _WKBrowserInspector.h in Headers */,
 				CD89ACBD2EA696A300C76423 /* _WKCaptionStyleMenuController.h in Headers */,
 				97C476282ECD33A6004D1492 /* _WKCaptionStyleMenuControllerInternal.h in Headers */,
 				5C4609E7224317B4009943C2 /* _WKContentRuleListAction.h in Headers */,
@@ -18059,6 +18113,7 @@
 				E170876C16D6CA6900F99226 /* BlobRegistryProxy.h in Headers */,
 				4F601432155C5AA2001FBDE0 /* BlockingResponseMap.h in Headers */,
 				1A5705111BE410E600874AF1 /* BlockSPI.h in Headers */,
+				D71A944C237239FB002C4D9E /* BrowserInspectorPipe.h in Headers */,
 				5CA9854A210BEB640057EB6B /* BrowsingWarning.h in Headers */,
 				A7E69BCC2B2117A100D43D3F /* BufferAndBackendInfo.h in Headers */,
 				BC3065FA1259344E00E71278 /* CacheModel.h in Headers */,
@@ -18265,7 +18320,11 @@
 				BC14DF77120B5B7900826C0C /* InjectedBundleScriptWorld.h in Headers */,
 				CE550E152283752200D28791 /* InsertTextOptions.h in Headers */,
 				9197940523DBC4BB00257892 /* InspectorBrowserAgent.h in Headers */,
+				D76D6888238DBD81008D314B /* InspectorDialogAgent.h in Headers */,
 				996B2B9D25E257FF00719379 /* InspectorExtensionDelegate.h in Headers */,
+				D71A94342370E07A002C4D9E /* InspectorPlaywrightAgentClient.h in Headers */,
+				D71A94322370E025002C4D9E /* InspectorPlaywrightAgentClientMac.h in Headers */,
+				F3867F0A24607D4E008F0F31 /* InspectorScreencastAgent.h in Headers */,
 				A5E391FD2183C1F800C8FB31 /* InspectorTargetProxy.h in Headers */,
 				07AE8FBD2F3BC4F300A4C0CA /* InteractionInformationAtPosition.h in Headers */,
 				07AE8FC22F3BC58200A4C0CA /* InteractionInformationRequest.h in Headers */,
@@ -18550,6 +18609,7 @@
 				07E065142F19E01000ECDA2E /* RemoteGPU.h in Headers */,
 				0F6E7C532C4C386800F1DB85 /* RemoteGraphicsContextMessages.h in Headers */,
 				F451C0FE2703B263002BA03B /* RemoteGraphicsContextProxy.h in Headers */,
+				D71A943A2370F061002C4D9E /* RemoteInspectorPipe.h in Headers */,
 				2D47B56D1810714E003A3AEE /* RemoteLayerBackingStore.h in Headers */,
 				2DDF731518E95060004F5A66 /* RemoteLayerBackingStoreCollection.h in Headers */,
 				5F4D67D682584880B7E5A569 /* RemoteLayerTreeCommitBundle.h in Headers */,
@@ -18995,6 +19055,8 @@
 				939EF87029D112EE00F23AEE /* WebPageInlines.h in Headers */,
 				9197940823DBC4CB00257892 /* WebPageInspectorAgentBase.h in Headers */,
 				A513F5402154A5D700662841 /* WebPageInspectorController.h in Headers */,
+				D71A94422371F67E002C4D9E /* WebPageInspectorEmulationAgent.h in Headers */,
+				D71A94432371F67E002C4D9E /* WebPageInspectorInputAgent.h in Headers */,
 				C0CE72A11247E71D00BC0EC4 /* WebPageMessages.h in Headers */,
 				2D5C9D0619C81D8F00B3C5C1 /* WebPageOverlay.h in Headers */,
 				939EF86F29D0C17300F23AEE /* WebPageProxy.h in Headers */,
@@ -21880,6 +21942,7 @@
 				522F792928D50EBB0069B45B /* HidService.mm in Sources */,
 				2749F6442146561B008380BF /* InjectedBundleNodeHandle.cpp in Sources */,
 				2749F6452146561E008380BF /* InjectedBundleRangeHandle.cpp in Sources */,
+				D7EB04E72372A73B00F744CE /* InspectorPlaywrightAgentClientMac.mm in Sources */,
 				074D6A652F385435006089F6 /* IntRectCG.swift in Sources */,
 				5CF250AF2EE06491006A7172 /* IPCTesterReceiver.swift in Sources */,
 				5C448C662EE06E11008931C7 /* IPCTesterReceiverMessageReceiver.swift in Sources */,
@@ -21899,6 +21962,7 @@
 				FA5AAE9C2E6A217A00FE693D /* NetworkSoftLink.mm in Sources */,
 				EEEEBCBD2EE35A8B000FF6AG /* NSGlassEffectView+Extras.swift in Sources */,
 				DD4BDE7B2CA38213001A3339 /* ObjectiveCBlockConversions.swift in Sources */,
+				D79902B2236E9404005D6F7E /* PageInspectorTargetProxyMac.mm in Sources */,
 				1CB9138F2E8C6D500002BCB7 /* PlatformUnifiedSource1-ARC.mm in Sources */,
 				1CB913932E8C71920002BCB7 /* PlatformUnifiedSource2-ARC.mm in Sources */,
 				A1B849382F3D9F02004256A1 /* PlaybackSessionInterfaceAVKit.mm in Sources */,
@@ -22242,6 +22306,8 @@
 				078B04A02CF18EAB00B453A6 /* WebPage+NavigationPreferences.swift in Sources */,
 				071467782DFE84E500F77867 /* WebPage+Transferable.swift in Sources */,
 				07CB79962CE9435700199C49 /* WebPage.swift in Sources */,
+				D79902B1236E9404005D6F7E /* WebPageInspectorEmulationAgentMac.mm in Sources */,
+				D79902B3236E9404005D6F7E /* WebPageInspectorInputAgentMac.mm in Sources */,
 				0715310F2F3037C100B56C0E /* WebPageProxy.swift in Sources */,
 				7CE9CE101FA0767A000177DE /* WebPageUpdatePreferences.cpp in Sources */,
 				079A4DA12D72CC0D00CA387F /* WebPageWebView.swift in Sources */,
diff --git a/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.cpp b/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.cpp
index c49360b01f22bed75a9c92b9d4ea0dbbb66d5617..0b6f28c163680d51bfee78e37613fa73b31e05dc 100644
--- a/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.cpp
+++ b/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.cpp
@@ -93,4 +93,13 @@ String FrameInspectorTarget::toTargetID(WebCore::FrameIdentifier frameID, WebCor
     return makeString("frame-"_s, frameID.toUInt64(), '-', processID.toUInt64());
 }
 
+void FrameInspectorTarget::didCreateSubframe(WebFrame& frame)
+{
+    if (!m_channel)
+        return;
+
+    // Auto connect to the subframe if the parent frame is inspected.
+    frame.connectInspector(static_cast<Inspector::FrontendChannel*>(m_channel.get())->connectionType());
+}
+
 } // namespace WebKit
diff --git a/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.h b/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.h
index 2b2820a4ded07d459f3342d5457c0747c2db2215..261c255b95071b7e02365904935381c789970d48 100644
--- a/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.h
+++ b/Source/WebKit/WebProcess/Inspector/FrameInspectorTarget.h
@@ -56,6 +56,8 @@ public:
 
     static String toTargetID(WebCore::FrameIdentifier, WebCore::ProcessIdentifier);
 
+    void didCreateSubframe(WebFrame&);
+
 private:
     WeakRef<WebFrame> m_frame;
     std::unique_ptr<UIProcessForwardingFrontendChannel> m_channel;
diff --git a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
index ef050f1bf94dc201a89055164a5c0c9f33b9bbad..2e228513e686dd67e3e8129670b0ad374a5f54d2 100644
--- a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
+++ b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
@@ -273,6 +273,11 @@ void WebLoaderStrategy::scheduleLoad(ResourceLoader& resourceLoader, CachedResou
     }
 #endif
 
+    if (m_emulateOfflineState) {
+        scheduleInternallyFailedLoad(resourceLoader);
+        return;
+    }
+
 #if ENABLE(PDFJS)
     if (tryLoadingUsingPDFJSHandler(resourceLoader, trackingParameters))
         return;
@@ -294,12 +299,16 @@ void WebLoaderStrategy::scheduleLoad(ResourceLoader& resourceLoader, CachedResou
     }
 
     if (InspectorInstrumentationWebKit::shouldInterceptRequest(resourceLoader)) {
-        InspectorInstrumentationWebKit::interceptRequest(resourceLoader, [this, protectedThis = Ref { *this }, protectedResourceLoader = Ref { resourceLoader }, trackingParameters, shouldClearReferrerOnHTTPSToHTTPRedirect, resource = RefPtr { resource }](const ResourceRequest& request) {
-            auto& resourceLoader = protectedResourceLoader.get();
-            WEBLOADERSTRATEGY_RELEASE_LOG("scheduleLoad: intercepted URL will be scheduled with the NetworkProcess");
-            scheduleLoadFromNetworkProcess(resourceLoader, request, *trackingParameters, shouldClearReferrerOnHTTPSToHTTPRedirect, maximumBufferingTime(resource));
-        });
-        return;
+        bool isMainFrameNavigation = resourceLoader.frame() && resourceLoader.frame()->isMainFrame() && resourceLoader.options().mode == FetchOptions::Mode::Navigate;
+        // Do not intercept navigation request which could already have been intercepted and resumed.
+        if (!(isMainFrameNavigation && m_existingNetworkResourceLoadIdentifierToResume)) {
+            InspectorInstrumentationWebKit::interceptRequest(resourceLoader, [this, protectedThis = Ref { *this }, protectedResourceLoader = Ref { resourceLoader }, trackingParameters, shouldClearReferrerOnHTTPSToHTTPRedirect, resource = RefPtr { resource }](const ResourceRequest& request) {
+                auto& resourceLoader = protectedResourceLoader.get();
+                WEBLOADERSTRATEGY_RELEASE_LOG("scheduleLoad: intercepted URL will be scheduled with the NetworkProcess");
+                scheduleLoadFromNetworkProcess(resourceLoader, request, *trackingParameters, shouldClearReferrerOnHTTPSToHTTPRedirect, maximumBufferingTime(resource));
+            });
+            return;
+        }
     }
 
     WEBLOADERSTRATEGY_RELEASE_LOG_FORWARDABLE(WebLoaderStrategyScheduleLoad);
@@ -431,7 +440,7 @@ static void addParametersShared(const LocalFrame* frame, NetworkResourceLoadPara
         parameters.linkPreconnectEarlyHintsEnabled = mainFrame->settings().linkPreconnectEarlyHintsEnabled();
 }
 
-void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceLoader, const ResourceRequest& request, const WebResourceLoader::TrackingParameters& trackingParameters, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Seconds maximumBufferingTime)
+bool WebLoaderStrategy::fillParametersForNetworkProcessLoad(ResourceLoader& resourceLoader, const ResourceRequest& request, const WebResourceLoader::TrackingParameters& trackingParameters, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Seconds maximumBufferingTime, NetworkResourceLoadParameters& loadParameters)
 {
     auto identifier = *resourceLoader.identifier();
 
@@ -443,10 +452,10 @@ void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceL
             && resourceLoader.frameLoader()->notifier().isInitialRequestIdentifier(identifier)
             ? MainFrameMainResource::Yes : MainFrameMainResource::No;
         if (!page->allowsLoadFromURL(request.url(), mainFrameMainResource)) {
-            RunLoop::mainSingleton().dispatch([resourceLoader = Ref { resourceLoader }, error = blockedError(request)] {
+            RunLoop::mainSingleton().dispatch([resourceLoader = Ref { resourceLoader }, error = platformStrategies()->loaderStrategy()->blockedError(request)] {
                 resourceLoader->didFail(error);
             });
-            return;
+            return false;
         }
     }
 
@@ -456,19 +465,6 @@ void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceL
 
     LOG(NetworkScheduling, "(WebProcess) WebLoaderStrategy::scheduleLoad, url '%s' will be scheduled with the NetworkProcess with priority %d, storedCredentialsPolicy %i", resourceLoader.url().string().latin1().data(), static_cast<int>(resourceLoader.request().priority()), (int)storedCredentialsPolicy);
 
-    NetworkResourceLoadParameters loadParameters {
-        trackingParameters.webPageProxyID,
-        trackingParameters.pageID,
-        trackingParameters.frameID,
-        request
-    };
-    if (!loadParameters.createSandboxExtensionHandlesIfNecessary()) {
-        RunLoop::mainSingleton().dispatch([resourceLoader = Ref { resourceLoader }, error = blockedError(request)] {
-            resourceLoader->didFail(error);
-        });
-        return;
-    }
-
     loadParameters.identifier = identifier;
     loadParameters.parentPID = legacyPresentingApplicationPID();
     loadParameters.contentSniffingPolicy = contentSniffingPolicy;
@@ -563,14 +559,11 @@ void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceL
 
     if (loadParameters.options.mode != FetchOptions::Mode::Navigate) {
         ASSERT(loadParameters.sourceOrigin);
-        if (!loadParameters.sourceOrigin) {
-            WEBLOADERSTRATEGY_RELEASE_LOG_ERROR("scheduleLoad: no sourceOrigin (priority=%d)", static_cast<int>(resourceLoader.request().priority()));
-            scheduleInternallyFailedLoad(resourceLoader);
-            return;
-        }
+        if (!loadParameters.sourceOrigin)
+            return false;
     }
 
-    loadParameters.shouldRestrictHTTPResponseAccess = shouldPerformSecurityChecks();
+    loadParameters.shouldRestrictHTTPResponseAccess = true;
 
     loadParameters.isMainFrameNavigation = isMainFrameNavigation;
     if (loadParameters.isMainFrameNavigation && document) {
@@ -635,6 +628,30 @@ void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceL
     if (RefPtr handle = resourceLoader.cachedResource())
         loadParameters.isInitiatorPrefetch = handle->type() == CachedResource::Type::LinkPrefetch;
 
+    return true;
+}
+
+void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceLoader, const ResourceRequest& request, const WebResourceLoader::TrackingParameters& trackingParameters, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Seconds maximumBufferingTime)
+{
+    NetworkResourceLoadParameters loadParameters {
+        trackingParameters.webPageProxyID,
+        trackingParameters.pageID,
+        trackingParameters.frameID,
+        request
+    };
+    if (!loadParameters.createSandboxExtensionHandlesIfNecessary()) {
+        RunLoop::mainSingleton().dispatch([resourceLoader = Ref { resourceLoader }, error = blockedError(request)] {
+            resourceLoader->didFail(error);
+        });
+        return;
+    }
+
+    if (!fillParametersForNetworkProcessLoad(resourceLoader, request, trackingParameters, shouldClearReferrerOnHTTPSToHTTPRedirect, maximumBufferingTime, loadParameters)) {
+        WEBLOADERSTRATEGY_RELEASE_LOG_ERROR("scheduleLoad: no sourceOrigin (priority=%d)", static_cast<int>(resourceLoader.request().priority()));
+        scheduleInternallyFailedLoad(resourceLoader);
+        return;
+    }
+
     std::optional<NetworkResourceLoadIdentifier> existingNetworkResourceLoadIdentifierToResume;
     if (loadParameters.isMainFrameNavigation)
         existingNetworkResourceLoadIdentifierToResume = std::exchange(m_existingNetworkResourceLoadIdentifierToResume, std::nullopt);
@@ -650,7 +667,7 @@ void WebLoaderStrategy::scheduleLoadFromNetworkProcess(ResourceLoader& resourceL
     }
 
     auto loader = WebResourceLoader::create(resourceLoader, trackingParameters);
-    m_webResourceLoaders.set(identifier, WTF::move(loader));
+    m_webResourceLoaders.set(*resourceLoader.identifier(), WTF::move(loader));
 }
 
 void WebLoaderStrategy::scheduleInternallyFailedLoad(WebCore::ResourceLoader& resourceLoader)
@@ -1070,7 +1087,7 @@ void WebLoaderStrategy::didFinishPreconnection(WebCore::ResourceLoaderIdentifier
 
 bool WebLoaderStrategy::isOnLine() const
 {
-    return m_isOnLine;
+    return m_emulateOfflineState ? false : m_isOnLine;
 }
 
 void WebLoaderStrategy::addOnlineStateChangeListener(Function<void(bool)>&& listener)
@@ -1096,6 +1113,11 @@ void WebLoaderStrategy::isResourceLoadFinished(CachedResource& resource, Complet
 
 void WebLoaderStrategy::setOnLineState(bool isOnLine)
 {
+    if (m_emulateOfflineState) {
+        m_isOnLine = isOnLine;
+        return;
+    }
+
     if (m_isOnLine == isOnLine)
         return;
 
@@ -1104,6 +1126,12 @@ void WebLoaderStrategy::setOnLineState(bool isOnLine)
         listener(isOnLine);
 }
 
+void WebLoaderStrategy::setEmulateOfflineState(bool offline) {
+    m_emulateOfflineState = offline;
+    for (auto& listener : m_onlineStateChangeListeners)
+        listener(offline ? false : m_isOnLine);
+}
+
 void WebLoaderStrategy::setCaptureExtraNetworkLoadMetricsEnabled(bool enabled)
 {
     WebProcess::singleton().ensureNetworkProcessConnection().connection().send(Messages::NetworkConnectionToWebProcess::SetCaptureExtraNetworkLoadMetricsEnabled(enabled), 0);
diff --git a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
index ab7f322fc4e1b340bb0acdc84d4f7ba39a6e0df0..d79aea95dc4e2ead71a161b24c0e1f081fad4404 100644
--- a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
+++ b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
@@ -26,6 +26,7 @@
 #pragma once
 
 #include "NetworkResourceLoadIdentifier.h"
+#include "NetworkResourceLoadParameters.h"
 #include "WebResourceLoader.h"
 #include <WebCore/LoaderStrategy.h>
 #include <WebCore/ResourceError.h>
@@ -98,6 +99,9 @@ public:
     bool isOnLine() const final;
     void addOnlineStateChangeListener(Function<void(bool)>&&) final;
     void setOnLineState(bool);
+    void setEmulateOfflineState(bool) final;
+
+    bool fillParametersForNetworkProcessLoad(WebCore::ResourceLoader&, const WebCore::ResourceRequest&, const WebResourceLoader::TrackingParameters&, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Seconds maximumBufferingTime, NetworkResourceLoadParameters&);
 
     void setExistingNetworkResourceLoadIdentifierToResume(std::optional<NetworkResourceLoadIdentifier> existingNetworkResourceLoadIdentifierToResume) { m_existingNetworkResourceLoadIdentifierToResume = existingNetworkResourceLoadIdentifierToResume; }
 
@@ -166,6 +170,7 @@ private:
     Vector<Function<void(bool)>> m_onlineStateChangeListeners;
     std::optional<NetworkResourceLoadIdentifier> m_existingNetworkResourceLoadIdentifierToResume;
     bool m_isOnLine { true };
+    bool m_emulateOfflineState { false };
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/WebProcess/Network/WebResourceLoader.cpp b/Source/WebKit/WebProcess/Network/WebResourceLoader.cpp
index 24c2649b31ce74a91911c8d8ff9be630dc29d576..11e1b09f7fe0573374f887bcbe57e25e4a8f6b87 100644
--- a/Source/WebKit/WebProcess/Network/WebResourceLoader.cpp
+++ b/Source/WebKit/WebProcess/Network/WebResourceLoader.cpp
@@ -236,9 +236,6 @@ void WebResourceLoader::didReceiveResponse(ResourceResponse&& response, PrivateR
 
             coreLoader->didReceiveResponse(ResourceResponse { inspectorResponse }, [this, protectedThis = Ref { *this }, interceptedRequestIdentifier, policyDecisionCompletionHandler = WTF::move(policyDecisionCompletionHandler), overrideData = WTF::move(overrideData)]() mutable {
                 RefPtr coreLoader = m_coreLoader;
-                if (policyDecisionCompletionHandler)
-                    policyDecisionCompletionHandler();
-
                 if (!m_coreLoader || !coreLoader->identifier()) {
                     m_interceptController.continueResponse(interceptedRequestIdentifier);
                     return;
@@ -255,6 +252,8 @@ void WebResourceLoader::didReceiveResponse(ResourceResponse&& response, PrivateR
                 }
             });
         });
+        if (policyDecisionCompletionHandler)
+          policyDecisionCompletionHandler();
         return;
     }
 
diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebChromeClient.cpp b/Source/WebKit/WebProcess/WebCoreSupport/WebChromeClient.cpp
index 83519d3b8b16ad84a162f99ec6e3c9f9a0525e73..5cb5b17e983ef538c12bcaa81fe9e425cd622f06 100644
--- a/Source/WebKit/WebProcess/WebCoreSupport/WebChromeClient.cpp
+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebChromeClient.cpp
@@ -503,6 +503,9 @@ void WebChromeClient::addMessageToConsole(MessageSource source, MessageLevel lev
     if (!page)
         return;
 
+    if (level == MessageLevel::Error)
+        page->send(Messages::WebPageProxy::LogToStderr(message));
+
 #if !PLATFORM(COCOA)
     page->injectedBundleUIClient().willAddMessageToConsole(page.get(), source, level, message, lineNumber, columnNumber, sourceID);
 #endif
diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebDragClient.cpp b/Source/WebKit/WebProcess/WebCoreSupport/WebDragClient.cpp
index b3f2fc81270244d1e52568f2355b7e4390ce4ae3..7e34067a3c7dc61a355ac1ddd7c7a874d6bc0771 100644
--- a/Source/WebKit/WebProcess/WebCoreSupport/WebDragClient.cpp
+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebDragClient.cpp
@@ -53,7 +53,7 @@ OptionSet<DragSourceAction> WebDragClient::dragSourceActionMaskForPoint(const In
     return m_page.get()->allowedDragSourceActions();
 }
 
-#if !PLATFORM(COCOA) && !PLATFORM(GTK) && !PLATFORM(WPE)
+#if !PLATFORM(COCOA) && !PLATFORM(GTK) && !PLATFORM(WPE) && !PLATFORM(WIN)
 void WebDragClient::startDrag(DragItem, DataTransfer&, Frame&, const std::optional<NodeIdentifier>&)
 {
 }
diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebUserMediaClient.cpp b/Source/WebKit/WebProcess/WebCoreSupport/WebUserMediaClient.cpp
index 23fdfa0d3d98fc703324372684208e5c4b190dbd..529870b21ab6f2ecd41eaea822186b325d7e1ff7 100644
--- a/Source/WebKit/WebProcess/WebCoreSupport/WebUserMediaClient.cpp
+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebUserMediaClient.cpp
@@ -26,6 +26,7 @@
 #include "UserMediaPermissionRequestManager.h"
 #include "WebPage.h"
 #include "WebPageProxyMessages.h"
+#include <WebCore/ContextDestructionObserverInlines.h>
 #include <WebCore/UserMediaController.h>
 #include <WebCore/UserMediaRequest.h>
 #include <wtf/TZoneMallocInlines.h>
diff --git a/Source/WebKit/WebProcess/WebCoreSupport/cocoa/WebDragClientCocoa.mm b/Source/WebKit/WebProcess/WebCoreSupport/cocoa/WebDragClientCocoa.mm
index bad45b79e581bd66fabf6c09189ed05317a1946e..08cbd2fa2d6283b29168ee3d0140bd35bb878098 100644
--- a/Source/WebKit/WebProcess/WebCoreSupport/cocoa/WebDragClientCocoa.mm
+++ b/Source/WebKit/WebProcess/WebCoreSupport/cocoa/WebDragClientCocoa.mm
@@ -131,7 +131,8 @@ static RefPtr<WebCore::CachedImage> cachedImage(Element& element)
 
 void WebDragClient::declareAndWriteDragImage(const String& pasteboardName, Element& element, const URL& url, const String& label, LocalFrame*)
 {
-    ASSERT(pasteboardName == String(NSPasteboardNameDrag));
+    if (pasteboardName != String(NSPasteboardNameDrag))
+        return;
 
     RefPtr image = cachedImage(element);
 
diff --git a/Source/WebKit/WebProcess/WebCoreSupport/win/WebDragClientWin.cpp b/Source/WebKit/WebProcess/WebCoreSupport/win/WebDragClientWin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..741ef5b11fe8718529105339cda0fab597bad9de
--- /dev/null
+++ b/Source/WebKit/WebProcess/WebCoreSupport/win/WebDragClientWin.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2011 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebDragClient.h"
+
+#if ENABLE(DRAG_SUPPORT)
+
+#include "MessageSenderInlines.h"
+#include "WebPage.h"
+#include "WebPageProxyMessages.h"
+#include <WebCore/DataTransfer.h>
+#include <WebCore/DragData.h>
+#include <WebCore/NodeIdentifier.h>
+#include <WebCore/Pasteboard.h>
+#include <WebCore/ShareableBitmap.h>
+#include <wtf/win/GDIObject.h>
+
+#include <optional>
+
+namespace WebKit {
+using namespace WebCore;
+
+void WebDragClient::didConcludeEditDrag()
+{
+}
+
+void WebDragClient::startDrag(DragItem, DataTransfer& dataTransfer, Frame& frame, const std::optional<NodeIdentifier>&)
+{
+    m_page->willStartDrag();
+    m_page->send(Messages::WebPageProxy::StartDrag(dataTransfer.pasteboard().createDragDataMap()));
+}
+
+}; // namespace WebKit.
+
+#endif // ENABLE(DRAG_SUPPORT)
diff --git a/Source/WebKit/WebProcess/WebPage/DrawingArea.cpp b/Source/WebKit/WebProcess/WebPage/DrawingArea.cpp
index 5ac78eb5880335f49a9a6f2690626e46fbcac7f4..aa12d9c96279054e01cc9e82e78547a75702a85f 100644
--- a/Source/WebKit/WebProcess/WebPage/DrawingArea.cpp
+++ b/Source/WebKit/WebProcess/WebPage/DrawingArea.cpp
@@ -27,6 +27,7 @@
 #include "DrawingArea.h"
 
 #include "DrawingAreaMessages.h"
+#include "DrawingAreaProxyMessages.h"
 #include "Logging.h"
 #include "WebPage.h"
 #include "WebPageCreationParameters.h"
diff --git a/Source/WebKit/WebProcess/WebPage/WebCookieJar.cpp b/Source/WebKit/WebProcess/WebPage/WebCookieJar.cpp
index 42644873c3a43e84452298c131d1d356eed6b36c..9718fb79e8918809099bc3eedd1cdfc7d751a575 100644
--- a/Source/WebKit/WebProcess/WebPage/WebCookieJar.cpp
+++ b/Source/WebKit/WebProcess/WebPage/WebCookieJar.cpp
@@ -43,6 +43,7 @@
 #include <WebCore/FrameLoader.h>
 #include <WebCore/LocalFrame.h>
 #include <WebCore/LocalFrameLoaderClient.h>
+#include <WebCore/ResourceLoader.h>
 #include <WebCore/ScriptTrackingPrivacyCategory.h>
 #include <WebCore/Settings.h>
 #include <WebCore/StorageSessionProvider.h>
@@ -446,6 +447,12 @@ void WebCookieJar::setOptInCookiePartitioningEnabled(bool enabled)
 }
 #endif
 
+void WebCookieJar::setCookieFromResponse(ResourceLoader& loader, const String& setCookieValue)
+{
+    const auto& request = loader.request();
+    WebProcess::singleton().ensureNetworkProcessConnection().connection().send(Messages::NetworkConnectionToWebProcess::SetCookieFromResponse(request.firstPartyForCookies(), SameSiteInfo::create(request), request.url(), setCookieValue), 0);
+}
+
 #if !PLATFORM(COCOA)
 
 String WebCookieJar::cookiesInPartitionedCookieStorage(const WebCore::Document&, const URL&, const WebCore::SameSiteInfo&) const
diff --git a/Source/WebKit/WebProcess/WebPage/WebCookieJar.h b/Source/WebKit/WebProcess/WebPage/WebCookieJar.h
index a7ad18fc1201e5de2cc1528539a765599ecfc41e..ebea233bc54ab6e56fb7093ff63e2368e8670ccd 100644
--- a/Source/WebKit/WebProcess/WebPage/WebCookieJar.h
+++ b/Source/WebKit/WebProcess/WebPage/WebCookieJar.h
@@ -81,6 +81,8 @@ public:
     void setOptInCookiePartitioningEnabled(bool);
 #endif
 
+    void setCookieFromResponse(WebCore::ResourceLoader&, const String& setCookieValue);
+
 private:
     WebCookieJar();
 
diff --git a/Source/WebKit/WebProcess/WebPage/WebFrame.cpp b/Source/WebKit/WebProcess/WebPage/WebFrame.cpp
index 2a3aa30f08da8e00e790dbdbac574c986a3a4f0a..9b70be2682defadef10da8b69af50ca115878cf6 100644
--- a/Source/WebKit/WebProcess/WebPage/WebFrame.cpp
+++ b/Source/WebKit/WebProcess/WebPage/WebFrame.cpp
@@ -181,6 +181,9 @@ Ref<WebFrame> WebFrame::createSubframe(WebPage& page, WebFrame& parent, const At
     ASSERT(ownerElement.document().frame());
     coreFrame->init();
 
+    if (parent.m_inspectorTarget)
+        parent.m_inspectorTarget->didCreateSubframe(frame);
+
     return frame;
 }
 
diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.cpp b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
index ead5b0db7cebdf2053358cc3a45c8298d0b0ad83..7b92d1d6e59cb5fbaaf9b0f638e25e7b2b2f2d63 100644
--- a/Source/WebKit/WebProcess/WebPage/WebPage.cpp
+++ b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
@@ -264,6 +264,7 @@
 #include <WebCore/ImageAnalysisQueue.h>
 #include <WebCore/ImageOverlay.h>
 #include <WebCore/ImageUtilities.h>
+#include <WebCore/InspectorInstrumentationWebKit.h>
 #include <WebCore/JSDOMExceptionHandling.h>
 #include <WebCore/JSNode.h>
 #include <WebCore/KeyboardEvent.h>
@@ -1227,6 +1228,14 @@ WebPage::WebPage(PageIdentifier pageID, WebPageCreationParameters&& parameters)
     setLinkDecorationFilteringData(WTF::move(parameters.linkDecorationFilteringData));
     setAllowedQueryParametersForAdvancedPrivacyProtections(WTF::move(parameters.allowedQueryParametersForAdvancedPrivacyProtections));
 #endif
+    if (parameters.deviceOrientationOverride)
+        page->setOverrideOrientation(parameters.deviceOrientationOverride);
+    // For popup windows WebPage::Show() maybe called in the next lines from the constructor,
+    // at which point the page is not in the WebProcess's map yet and it is not safe to
+    // dispatch nested message loop and receive IPC messages. To mitigate that, the actual
+    // pause is postponed until the page is added to the map.
+    if (parameters.shouldPauseInInspectorWhenShown)
+        m_page->inspectorController().pauseOnStart(parameters.windowFeatures ? PageInspectorController::PauseCondition::WHEN_CREATION_FINISHED : PageInspectorController::PauseCondition::WHEN_SHOWN);
     if (parameters.windowFeatures) {
         page->applyWindowFeatures(*parameters.windowFeatures);
         page->chrome().show();
@@ -2217,6 +2226,22 @@ void WebPage::loadDidCommitInAnotherProcess(WebCore::FrameIdentifier frameID, st
     frame->loadDidCommitInAnotherProcess(layerHostingContextIdentifier);
 }
 
+void WebPage::loadRequestInFrameForInspector(LoadParameters&& loadParameters, WebCore::FrameIdentifier frameID)
+{
+    WebFrame* frame = WebProcess::singleton().webFrame(frameID);
+    if (!frame) {
+        send(Messages::WebPageProxy::DidDestroyNavigation(*loadParameters.navigationID));
+        return;
+    }
+
+    // FIXME: use m_pendingNavigationID instead?
+    m_pendingFrameNavigationID = loadParameters.navigationID;
+
+    FrameLoadRequest frameLoadRequest { *frame->coreLocalFrame(), WTF::move(loadParameters.request) };
+    frame->coreLocalFrame()->loader().load(WTF::move(frameLoadRequest));
+    ASSERT(!m_pendingFrameNavigationID);
+}
+
 void WebPage::loadRequest(LoadParameters&& loadParameters)
 {
     WEBPAGE_RELEASE_LOG_FORWARDABLE(Loading, WebPageLoadRequest, loadParameters.navigationID ? loadParameters.navigationID->toUInt64() : 0, static_cast<unsigned>(loadParameters.shouldTreatAsContinuingLoad), loadParameters.request.isAppInitiated(), loadParameters.existingNetworkResourceLoadIdentifierToResume ? loadParameters.existingNetworkResourceLoadIdentifierToResume->toUInt64() : 0);
@@ -2408,7 +2433,9 @@ void WebPage::stopLoading()
 void WebPage::stopLoadingDueToProcessSwap()
 {
     SetForScope isStoppingLoadingDueToProcessSwap(m_isStoppingLoadingDueToProcessSwap, true);
+    InspectorInstrumentationWebKit::setStoppingLoadingDueToProcessSwap(m_page.get(), true);
     stopLoading();
+    InspectorInstrumentationWebKit::setStoppingLoadingDueToProcessSwap(m_page.get(), false);
 }
 
 bool WebPage::defersLoading() const
@@ -2997,7 +3024,7 @@ void WebPage::viewportPropertiesDidChange(const ViewportArguments& viewportArgum
 #if PLATFORM(IOS_FAMILY)
     if (m_viewportConfiguration.setViewportArguments(viewportArguments))
         viewportConfigurationChanged();
-#elif PLATFORM(GTK) || PLATFORM(WPE)
+#elif PLATFORM(GTK) || PLATFORM(WPE) || PLATFORM(WIN) || PLATFORM(MAC)
     // Adjust view dimensions when using fixed layout.
     RefPtr localMainFrame = this->localMainFrame();
     RefPtr view = localMainFrame ? localMainFrame->view() : nullptr;
@@ -3858,6 +3885,13 @@ void WebPage::flushDeferredIntersectionObservations()
     protect(corePage())->flushDeferredIntersectionObservations();
 }
 
+#if ENABLE(ORIENTATION_EVENTS)
+void WebPage::setDeviceOrientation(WebCore::IntDegrees deviceOrientation)
+{
+    m_page->setOverrideOrientation(deviceOrientation);
+}
+#endif
+
 void WebPage::flushDeferredDidReceiveMouseEvent()
 {
     if (auto info = std::exchange(m_deferredDidReceiveMouseEvent, std::nullopt))
@@ -4147,6 +4181,100 @@ void WebPage::touchEvent(const WebTouchEvent& touchEvent, CompletionHandler<void
 
     completionHandler(touchEvent.type(), handled);
 }
+
+void WebPage::fakeTouchTap(const WebCore::IntPoint& position, uint8_t modifiers, CompletionHandler<void()>&& completionHandler)
+{
+    SetForScope<bool> userIsInteractingChange { m_userIsInteracting, true };
+
+    bool handled = false;
+
+    uint32_t id = 0;
+    float radiusX = 1.0;
+    float radiusY = 1.0;
+    float rotationAngle = 0.0;
+    float force = 1.0;
+    const WebCore::DoubleSize radius(radiusX,radiusY);
+    const WebCore::DoublePoint screenPosition = position;
+    OptionSet<WebEventModifier> eventModifiers;
+    eventModifiers = eventModifiers.fromRaw(modifiers);
+
+    {
+        Vector<WebPlatformTouchPoint> touchPoints;
+        WebPlatformTouchPoint::State state = WebPlatformTouchPoint::State::Pressed;
+        touchPoints.append(WebPlatformTouchPoint(id, state, screenPosition, position, radius, rotationAngle, force));
+
+        WebTouchEvent touchEvent({WebEventType::TouchStart, eventModifiers, MonotonicTime::now()}, WTF::move(touchPoints), {}, {});
+
+        CurrentEvent currentEvent(touchEvent);
+        handled = handleTouchEvent(m_page->mainFrame().frameID(), touchEvent, m_page.get()).value_or(false);
+    }
+    {
+        Vector<WebPlatformTouchPoint> touchPoints;
+        WebPlatformTouchPoint::State state = WebPlatformTouchPoint::State::Released;
+        touchPoints.append(WebPlatformTouchPoint(id, state, screenPosition, position, radius, rotationAngle, force));
+
+        WebTouchEvent touchEvent({WebEventType::TouchEnd, eventModifiers, MonotonicTime::now()}, WTF::move(touchPoints), {}, {});
+
+        CurrentEvent currentEvent(touchEvent);
+        handled = handleTouchEvent(m_page->mainFrame().frameID(), touchEvent, m_page.get()).value_or(false) || handled;
+    }
+    if (!handled) {
+        FloatPoint adjustedPoint;
+
+        auto* localMainFrame = dynamicDowncast<LocalFrame>(m_page->mainFrame());
+        if (!localMainFrame)
+            return;
+
+        RefPtr nodeRespondingToClick = localMainFrame->nodeRespondingToClickEvents(position, adjustedPoint);
+        Frame* frameRespondingToClick = nodeRespondingToClick ? nodeRespondingToClick->document().frame() : nullptr;
+        IntPoint adjustedIntPoint = roundedIntPoint(adjustedPoint);
+        if (!frameRespondingToClick) {
+            completionHandler();
+            return;
+        }
+        double force = 0.0;
+        SyntheticClickType syntheticClickType = SyntheticClickType::OneFingerTap;
+
+        auto modifiers = PlatformKeyboardEvent::currentStateOfModifierKeys();
+        localMainFrame->eventHandler().mouseMoved(PlatformMouseEvent(
+            adjustedIntPoint,
+            adjustedIntPoint,
+            MouseButton::None,
+            PlatformEvent::Type::MouseMoved,
+            0,
+            modifiers,
+            MonotonicTime::now(),
+            force,
+            syntheticClickType,
+            MouseEventInputSource::UserDriven
+        ));
+        localMainFrame->eventHandler().handleMousePressEvent(PlatformMouseEvent(
+            adjustedIntPoint,
+            adjustedIntPoint,
+            MouseButton::Left,
+            PlatformEvent::Type::MousePressed,
+            1,
+            modifiers,
+            MonotonicTime::now(),
+            force,
+            syntheticClickType,
+            MouseEventInputSource::UserDriven
+        ));
+        localMainFrame->eventHandler().handleMouseReleaseEvent(PlatformMouseEvent(
+            adjustedIntPoint,
+            adjustedIntPoint,
+            MouseButton::Left,
+            PlatformEvent::Type::MouseReleased,
+            1,
+            modifiers,
+            MonotonicTime::now(),
+            force,
+            syntheticClickType,
+            MouseEventInputSource::UserDriven
+        ));
+    }
+    completionHandler();
+}
 #endif
 
 void WebPage::cancelPointer(WebCore::PointerID pointerId, const WebCore::IntPoint& documentPoint)
@@ -4247,6 +4375,16 @@ void WebPage::sendMessageToTargetBackend(const String& message)
     ensureInspectorTarget()->sendMessageToTargetBackend(message);
 }
 
+void WebPage::resumeInspectorIfPausedInNewWindow()
+{
+    m_page->inspectorController().resumeIfPausedInNewWindow();
+}
+
+void WebPage::didAddWebPageToWebProcess()
+{
+    m_page->inspectorController().didFinishPageCreation();
+}
+
 void WebPage::insertNewlineInQuotedContent()
 {
     RefPtr frame = corePage()->focusController().focusedOrMainFrame();
@@ -4489,6 +4627,7 @@ void WebPage::setMainFrameDocumentVisualUpdatesAllowed(bool allowed)
 void WebPage::show()
 {
     send(Messages::WebPageProxy::ShowPage());
+    m_page->inspectorController().didShowPage();
 }
 
 void WebPage::setIsTakingSnapshotsForApplicationSuspension(bool isTakingSnapshotsForApplicationSuspension)
@@ -5561,7 +5700,7 @@ NotificationPermissionRequestManager* WebPage::notificationPermissionRequestMana
 
 #if ENABLE(DRAG_SUPPORT)
 
-#if PLATFORM(GTK)
+#if PLATFORM(GTK) || PLATFORM(WPE)
 void WebPage::performDragControllerAction(DragControllerAction action, const IntPoint& clientPosition, const IntPoint& globalPosition, OptionSet<DragOperation> draggingSourceOperationMask, SelectionData&& selectionData, OptionSet<DragApplicationFlags> flags, CompletionHandler<void(std::optional<DragOperation>, DragHandlingMethod, bool, unsigned, IntRect, IntRect, std::optional<RemoteUserInputEventData>)>&& completionHandler)
 {
     if (!m_page)
@@ -7932,6 +8071,10 @@ void WebPage::didCommitLoad(WebFrame* frame)
 
     if (frame && frame->isMainFrame())
         m_networkResourceRequestIdentifiersForPageLoadTiming.clear();
+// Playwright begin
+    if (frame->isMainFrame())
+        send(Messages::WebPageProxy::ViewScaleFactorDidChange(viewScaleFactor()));
+// Playwright end
 }
 
 void WebPage::didFinishDocumentLoad(WebFrame& frame)
@@ -8234,6 +8377,9 @@ Ref<DocumentLoader> WebPage::createDocumentLoader(LocalFrame& frame, ResourceReq
             m_allowsContentJavaScriptFromMostRecentNavigation = m_internals->pendingWebsitePolicies->allowsContentJavaScript;
             WebsitePoliciesData::applyToDocumentLoader(*std::exchange(m_internals->pendingWebsitePolicies, std::nullopt), documentLoader);
         }
+    } else if (m_pendingFrameNavigationID) {
+        documentLoader->setNavigationID(*m_pendingFrameNavigationID);
+        m_pendingFrameNavigationID = std::nullopt;
     }
 
     return documentLoader;
diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.h b/Source/WebKit/WebProcess/WebPage/WebPage.h
index 122efe1deb60835d3b834995d672374bae5ad557..1e9ad7f9665bb9256b3036e1dcb471d2bbe0f081 100644
--- a/Source/WebKit/WebProcess/WebPage/WebPage.h
+++ b/Source/WebKit/WebProcess/WebPage/WebPage.h
@@ -49,6 +49,7 @@
 #include <WebCore/NodeIdentifier.h>
 #include <WebCore/NowPlayingMetadataObserver.h>
 #include <WebCore/OwnerPermissionsPolicyData.h>
+#include <WebCore/Page.h>
 #include <WebCore/PageIdentifier.h>
 #include <WebCore/PageOverlay.h>
 #include <WebCore/PlatformLayerIdentifier.h>
@@ -1403,11 +1404,11 @@ public:
     void clearSelection();
     void restoreSelectionInFocusedEditableElement();
 
-#if ENABLE(DRAG_SUPPORT) && PLATFORM(GTK)
+#if ENABLE(DRAG_SUPPORT) && (PLATFORM(GTK) || PLATFORM(WPE)) 
     void performDragControllerAction(DragControllerAction, const WebCore::IntPoint& clientPosition, const WebCore::IntPoint& globalPosition, OptionSet<WebCore::DragOperation> draggingSourceOperationMask, WebCore::SelectionData&&, OptionSet<WebCore::DragApplicationFlags>, CompletionHandler<void(std::optional<WebCore::DragOperation>, WebCore::DragHandlingMethod, bool, unsigned, WebCore::IntRect, WebCore::IntRect, std::optional<WebCore::RemoteUserInputEventData>)>&&);
 #endif
 
-#if ENABLE(DRAG_SUPPORT) && !PLATFORM(GTK)
+#if ENABLE(DRAG_SUPPORT) && !PLATFORM(GTK) && !PLATFORM(WPE)
     void performDragControllerAction(std::optional<WebCore::FrameIdentifier>, DragControllerAction, WebCore::DragData&&, CompletionHandler<void(std::optional<WebCore::DragOperation>, WebCore::DragHandlingMethod, bool, unsigned, WebCore::IntRect, WebCore::IntRect, std::optional<WebCore::RemoteUserInputEventData>)>&&);
     void performDragOperation(std::optional<WebCore::FrameIdentifier>, WebCore::DragData&&, SandboxExtension::Handle&&, Vector<SandboxExtension::Handle>&&,  CompletionHandler<void(DragOperationResult dragOperationResult)>&&);
 #endif
@@ -1425,6 +1426,9 @@ public:
 #if ENABLE(MODEL_PROCESS)
     void modelDragEnded(WebCore::NodeIdentifier);
 #endif
+#if PLATFORM(MAC)
+    void setDragPasteboardName(const String& pasteboardName) { m_page->setDragPasteboardName(pasteboardName); }
+#endif
 #endif
 
 #if ENABLE(MODEL_PROCESS)
@@ -1526,8 +1530,11 @@ public:
     void gestureEvent(WebCore::FrameIdentifier, const WebGestureEvent&, CompletionHandler<void(std::optional<WebEventType>, bool, std::optional<WebCore::RemoteUserInputEventData>)>&&);
 #endif
 
-#if PLATFORM(IOS_FAMILY)
+#if ENABLE(ORIENTATION_EVENTS)
     void setDeviceOrientation(WebCore::IntDegrees);
+#endif
+
+#if PLATFORM(IOS_FAMILY)
     void dynamicViewportSizeUpdate(const DynamicViewportSizeUpdate&);
     bool scaleWasSetByUIProcess() const { return m_scaleWasSetByUIProcess; }
     void willStartUserTriggeredZooming();
@@ -1688,6 +1695,8 @@ public:
     void connectInspector(Inspector::FrontendChannel::ConnectionType);
     void disconnectInspector();
     void sendMessageToTargetBackend(const String& message);
+    void resumeInspectorIfPausedInNewWindow();
+    void didAddWebPageToWebProcess();
 
     void insertNewlineInQuotedContent();
 
@@ -2126,6 +2135,7 @@ public:
     void showContextMenuFromFrame(const FrameInfoData&, const ContextMenuContextData&, const UserData&);
 #endif
     void loadRequest(LoadParameters&&);
+    void loadRequestInFrameForInspector(LoadParameters&&, WebCore::FrameIdentifier);
 
     void setObscuredContentInsets(const WebCore::FloatBoxExtent&);
 
@@ -2348,6 +2358,7 @@ private:
     void updatePotentialTapSecurityOrigin(const WebTouchEvent&, bool wasHandled);
 #elif ENABLE(TOUCH_EVENTS)
     void touchEvent(const WebTouchEvent&, CompletionHandler<void(std::optional<WebEventType>, bool)>&&);
+    void fakeTouchTap(const WebCore::IntPoint& position, uint8_t modifiers, CompletionHandler<void()>&& completionHandler);
 #endif
 
     void cancelPointer(WebCore::PointerID, const WebCore::IntPoint&);
@@ -3171,6 +3182,7 @@ private:
     bool m_isAppNapEnabled { true };
 
     Markable<WebCore::NavigationIdentifier> m_pendingNavigationID;
+    Markable<WebCore::NavigationIdentifier> m_pendingFrameNavigationID;
 
     bool m_mainFrameProgressCompleted { false };
     bool m_shouldDispatchFakeMouseMoveEvents { true };
diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.messages.in b/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
index 7ae88ddd41930501d121e488a5e2d96693a87865..323373fdcb1c47583b05ced86bc96a9ff3080ed7 100644
--- a/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
+++ b/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
@@ -84,10 +84,13 @@ messages -> WebPage WantsAsyncDispatchMessage {
     CancelPotentialTap()
 #endif
 
+#if ENABLE(ORIENTATION_EVENTS)
+    SetDeviceOrientation(WebCore::IntDegrees deviceOrientation)
+#endif
+
 #if PLATFORM(IOS_FAMILY)
     SetSceneIdentifier(String sceneIdentifier)
     SetViewportConfigurationViewLayoutSize(WebCore::FloatSize size, double scaleFactor, double minimumEffectiveDeviceWidth)
-    SetDeviceOrientation(WebCore::IntDegrees deviceOrientation)
     SetOverrideViewportArguments(struct std::optional<WebCore::ViewportArguments> arguments)
     DynamicViewportSizeUpdate(struct WebKit::DynamicViewportSizeUpdate target)
 
@@ -174,6 +177,7 @@ messages -> WebPage WantsAsyncDispatchMessage {
     ConnectInspector(Inspector::FrontendChannel::ConnectionType connectionType)
     DisconnectInspector()
     SendMessageToTargetBackend(String message)
+    ResumeInspectorIfPausedInNewWindow();
 
 #if ENABLE(REMOTE_INSPECTOR)
     SetIndicating(bool indicating);
@@ -184,6 +188,7 @@ messages -> WebPage WantsAsyncDispatchMessage {
 #endif
 #if !ENABLE(IOS_TOUCH_EVENTS) && ENABLE(TOUCH_EVENTS)
     TouchEvent(WebKit::WebTouchEvent event) -> (enum:uint32_t std::optional<WebKit::WebEventType> eventType, bool handled)
+    FakeTouchTap(WebCore::IntPoint position, uint8_t modifiers) -> () Async
 #endif
 
     CancelPointer(WebCore::PointerID pointerId, WebCore::IntPoint documentPoint)
@@ -210,6 +215,7 @@ messages -> WebPage WantsAsyncDispatchMessage {
     LoadDataInFrame(std::span<const uint8_t> data, String MIMEType, String encodingName, URL baseURL, WebCore::FrameIdentifier frameID)
     LoadRequest(struct WebKit::LoadParameters loadParameters)
     LoadDidCommitInAnotherProcess(WebCore::FrameIdentifier frameID, std::optional<WebCore::LayerHostingContextIdentifier> layerHostingContextIdentifier)
+    LoadRequestInFrameForInspector(struct WebKit::LoadParameters loadParameters, WebCore::FrameIdentifier frameID)
     LoadRequestWaitingForProcessLaunch(struct WebKit::LoadParameters loadParameters, URL resourceDirectoryURL, WebKit::WebPageProxyIdentifier pageID, bool checkAssumedReadAccessToResourceURL)
     LoadData(struct WebKit::LoadParameters loadParameters)
     LoadSimulatedRequestAndResponse(struct WebKit::LoadParameters loadParameters, WebCore::ResourceResponse simulatedResponse)
@@ -376,10 +382,10 @@ messages -> WebPage WantsAsyncDispatchMessage {
     RemoveLayerForFindOverlay() -> ()
 
     # Drag and drop.
-#if PLATFORM(GTK) && ENABLE(DRAG_SUPPORT)
+#if (PLATFORM(GTK) || PLATFORM(WPE)) && ENABLE(DRAG_SUPPORT)
     PerformDragControllerAction(enum:uint8_t WebKit::DragControllerAction action, WebCore::IntPoint clientPosition, WebCore::IntPoint globalPosition, OptionSet<WebCore::DragOperation> draggingSourceOperationMask, WebCore::SelectionData selection, OptionSet<WebCore::DragApplicationFlags> flags) -> (enum:uint8_t std::optional<WebCore::DragOperation> dragOperation, enum:uint8_t WebCore::DragHandlingMethod dragHandlingMethod, bool mouseIsOverFileInput, unsigned numberOfItemsToBeAccepted, WebCore::IntRect insertionRect, WebCore::IntRect editableElementRect, struct std::optional<WebCore::RemoteUserInputEventData> remoteUserInputEventData)
 #endif
-#if !PLATFORM(GTK) && ENABLE(DRAG_SUPPORT)
+#if !PLATFORM(GTK) && !PLATFORM(WPE) && ENABLE(DRAG_SUPPORT)
     PerformDragControllerAction(std::optional<WebCore::FrameIdentifier> frameID, enum:uint8_t WebKit::DragControllerAction action, WebCore::DragData dragData) -> (enum:uint8_t std::optional<WebCore::DragOperation> dragOperation, enum:uint8_t WebCore::DragHandlingMethod dragHandlingMethod, bool mouseIsOverFileInput, unsigned numberOfItemsToBeAccepted, WebCore::IntRect insertionRect, WebCore::IntRect editableElementRect, struct std::optional<WebCore::RemoteUserInputEventData> remoteUserInputEventData)
     PerformDragOperation(std::optional<WebCore::FrameIdentifier> frameID, WebCore::DragData dragData, WebKit::SandboxExtensionHandle sandboxExtensionHandle, Vector<WebKit::SandboxExtensionHandle> sandboxExtensionsForUpload) -> (WebKit::DragOperationResult dragOperationResult)
 #endif
@@ -399,6 +405,10 @@ messages -> WebPage WantsAsyncDispatchMessage {
     ModelDragEnded(WebCore::NodeIdentifier nodeID)
 #endif
 
+#if PLATFORM(MAC) && ENABLE(DRAG_SUPPORT)
+    SetDragPasteboardName(String pasteboardName)
+#endif
+
 #if PLATFORM(IOS_FAMILY) && ENABLE(DRAG_SUPPORT)
     RequestDragStart(std::optional<WebCore::FrameIdentifier> remoteFrameID, WebCore::IntPoint clientPosition, WebCore::IntPoint globalPosition, OptionSet<WebCore::DragSourceAction> allowedActionsMask) -> (struct WebKit::DragInitiationResult result)
     RequestAdditionalItemsForDragSession(std::optional<WebCore::FrameIdentifier> rootFrameID, WebCore::IntPoint clientPosition, WebCore::IntPoint globalPosition, OptionSet<WebCore::DragSourceAction> allowedActionsMask) -> (struct WebKit::DragInitiationResult result)
diff --git a/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp b/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp
index 081c8dd9bc9402d909fba5359f90c686deb9987a..b9e548e8886861fa8013f5d8af1c893f5f4a3b99 100644
--- a/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp
+++ b/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp
@@ -224,16 +224,23 @@ String WebPage::platformUserAgent(const URL& url) const
 
 bool WebPage::hoverSupportedByPrimaryPointingDevice() const
 {
+    if (screenHasTouchDeviceOverride())
+        return !screenHasTouchDeviceOverride().value();
     return WebProcess::singleton().primaryPointingDevice() == AvailableInputDevices::Mouse;
 }
 
 bool WebPage::hoverSupportedByAnyAvailablePointingDevice() const
 {
+    if (screenHasTouchDeviceOverride())
+        return !screenHasTouchDeviceOverride().value();
     return WebProcess::singleton().availableInputDevices().contains(AvailableInputDevices::Mouse);
 }
 
 std::optional<PointerCharacteristics> WebPage::pointerCharacteristicsOfPrimaryPointingDevice() const
 {
+    if (screenHasTouchDeviceOverride() && screenHasTouchDeviceOverride().value())
+        return PointerCharacteristics::Coarse;
+
     const auto& primaryPointingDevice = WebProcess::singleton().primaryPointingDevice();
     if (primaryPointingDevice == AvailableInputDevices::Mouse)
         return PointerCharacteristics::Fine;
@@ -244,6 +251,9 @@ std::optional<PointerCharacteristics> WebPage::pointerCharacteristicsOfPrimaryPo
 
 OptionSet<PointerCharacteristics> WebPage::pointerCharacteristicsOfAllAvailablePointingDevices() const
 {
+    if (screenHasTouchDeviceOverride() && screenHasTouchDeviceOverride().value())
+        return PointerCharacteristics::Coarse;
+
     OptionSet<PointerCharacteristics> pointerCharacteristics;
     const auto& availableInputs = WebProcess::singleton().availableInputDevices();
     if (availableInputs.contains(AvailableInputDevices::Mouse))
diff --git a/Source/WebKit/WebProcess/WebPage/mac/WebPageMac.mm b/Source/WebKit/WebProcess/WebPage/mac/WebPageMac.mm
index 497cb8e358ace370d15803fda7c62bc51021e9e0..37a0f3a170729652cd74fd11d8e7e994c1305736 100644
--- a/Source/WebKit/WebProcess/WebPage/mac/WebPageMac.mm
+++ b/Source/WebKit/WebProcess/WebPage/mac/WebPageMac.mm
@@ -732,21 +732,37 @@ String WebPage::platformUserAgent(const URL&) const
 
 bool WebPage::hoverSupportedByPrimaryPointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    return !screenHasTouchDevice();
+#else
     return true;
+#endif
 }
 
 bool WebPage::hoverSupportedByAnyAvailablePointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    return !screenHasTouchDevice();
+#else
     return true;
+#endif
 }
 
 std::optional<PointerCharacteristics> WebPage::pointerCharacteristicsOfPrimaryPointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    if (screenHasTouchDevice())
+        return PointerCharacteristics::Coarse;
+#endif
     return PointerCharacteristics::Fine;
 }
 
 OptionSet<PointerCharacteristics> WebPage::pointerCharacteristicsOfAllAvailablePointingDevices() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    if (screenHasTouchDevice())
+        return PointerCharacteristics::Coarse;
+#endif
     return PointerCharacteristics::Fine;
 }
 
diff --git a/Source/WebKit/WebProcess/WebPage/win/WebPageWin.cpp b/Source/WebKit/WebProcess/WebPage/win/WebPageWin.cpp
index d32f7d2dd108647aeba05007a371b8c7381232a7..00da787b3ac4d312006a92475701c13366a1d740 100644
--- a/Source/WebKit/WebProcess/WebPage/win/WebPageWin.cpp
+++ b/Source/WebKit/WebProcess/WebPage/win/WebPageWin.cpp
@@ -45,6 +45,7 @@
 #include <WebCore/NotImplemented.h>
 #include <WebCore/Page.h>
 #include <WebCore/PlatformKeyboardEvent.h>
+#include <WebCore/PlatformScreen.h>
 #include <WebCore/PointerCharacteristics.h>
 #include <WebCore/Settings.h>
 #include <WebCore/SharedBuffer.h>
@@ -83,21 +84,37 @@ String WebPage::platformUserAgent(const URL&) const
 
 bool WebPage::hoverSupportedByPrimaryPointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    return !screenHasTouchDevice();
+#else
     return true;
+#endif
 }
 
 bool WebPage::hoverSupportedByAnyAvailablePointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    return !screenHasTouchDevice();
+#else
     return true;
+#endif
 }
 
 std::optional<PointerCharacteristics> WebPage::pointerCharacteristicsOfPrimaryPointingDevice() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    if (screenHasTouchDevice())
+        return PointerCharacteristics::Coarse;
+#endif
     return PointerCharacteristics::Fine;
 }
 
 OptionSet<PointerCharacteristics> WebPage::pointerCharacteristicsOfAllAvailablePointingDevices() const
 {
+#if ENABLE(TOUCH_EVENTS)
+    if (screenHasTouchDevice())
+        return PointerCharacteristics::Coarse;
+#endif
     return PointerCharacteristics::Fine;
 }
 
diff --git a/Source/WebKit/WebProcess/WebProcess.cpp b/Source/WebKit/WebProcess/WebProcess.cpp
index 09651c68a3694eda504e88f3dda0cad5cd97a3c6..f4a0d15d58a30b4fa059659ba99bd4aa91ed327d 100644
--- a/Source/WebKit/WebProcess/WebProcess.cpp
+++ b/Source/WebKit/WebProcess/WebProcess.cpp
@@ -95,6 +95,7 @@
 #include "WebsiteData.h"
 #include "WebsiteDataStoreParameters.h"
 #include "WebsiteDataType.h"
+#include <JavaScriptCore/IdentifiersFactory.h>
 #include <JavaScriptCore/JSLock.h>
 #include <JavaScriptCore/MemoryStatistics.h>
 #include <JavaScriptCore/WasmFaultSignalHandler.h>
@@ -427,6 +428,14 @@ void WebProcess::initializeProcess(const AuxiliaryProcessInitializationParameter
     {
         JSC::Options::AllowUnfinalizedAccessScope scope;
         JSC::Options::allowNonSPTagging() = false;
+        // Playwright begin
+        // SharedBufferArray is enabled only on Mac via XPC sercvice "enable-shared-array-buffer" option.
+        // For other platforms, enable it here.
+#if !PLATFORM(COCOA)
+        if (parameters.shouldEnableSharedArrayBuffer)
+            JSC::Options::useSharedArrayBuffer() = true;
+#endif
+        // Playwright end
         JSC::Options::notifyOptionsChanged();
     }
 
@@ -434,6 +443,8 @@ void WebProcess::initializeProcess(const AuxiliaryProcessInitializationParameter
     
     platformInitializeProcess(parameters);
     updateCPULimit();
+
+    Inspector::IdentifiersFactory::initializeWithProcessID(parameters.processIdentifier->toUInt64());
 }
 
 void WebProcess::initializeConnection(IPC::Connection* connection)
@@ -1058,6 +1069,7 @@ void WebProcess::createWebPage(PageIdentifier pageID, WebPageCreationParameters&
         m_hasPendingAccessibilityUnsuspension = false;
         accessibilityRelayProcessSuspended(false);
     }
+    page->didAddWebPageToWebProcess();
 }
 
 Awaitable<unsigned> WebProcess::countWebPagesForTesting()
diff --git a/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm b/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
index ba7911b2efe2ffdde8ab90f3c81817f65a43b2f0..259418a4eca2bb6ed9af2a62fbda155849c2f349 100644
--- a/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
+++ b/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
@@ -4207,7 +4207,7 @@ ALLOW_DEPRECATED_DECLARATIONS_END
     _private->handlingMouseDownEvent = NO;
 }
 
-#if ENABLE(TOUCH_EVENTS)
+#if ENABLE(IOS_TOUCH_EVENTS)
 
 - (void)touch:(WebEvent *)event
 {
diff --git a/Source/WebKitLegacy/mac/WebView/WebView.mm b/Source/WebKitLegacy/mac/WebView/WebView.mm
index bec7313812c922a7175d0f9aca27818066d54df8..8af7c061efe469493d5e2f38679b7038fb483c34 100644
--- a/Source/WebKitLegacy/mac/WebView/WebView.mm
+++ b/Source/WebKitLegacy/mac/WebView/WebView.mm
@@ -3976,7 +3976,7 @@ + (void)_doNotStartObservingNetworkReachability
 }
 #endif // PLATFORM(IOS_FAMILY)
 
-#if ENABLE(TOUCH_EVENTS)
+#if ENABLE(IOS_TOUCH_EVENTS)
 
 - (NSArray *)_touchEventRegions
 {
@@ -4018,7 +4018,7 @@ - (NSArray *)_touchEventRegions
     }).autorelease();
 }
 
-#endif // ENABLE(TOUCH_EVENTS)
+#endif // ENABLE(IOS_TOUCH_EVENTS)
 
 // For backwards compatibility with the WebBackForwardList API, we honor both
 // a per-WebView and a per-preferences setting for whether to use the back/forward cache.
diff --git a/Source/cmake/OptionsGTK.cmake b/Source/cmake/OptionsGTK.cmake
index 1f1b576f84c8ad254868d8e2b2f4f0429ea59d06..11e5f0d982166f5f5c6e44984d48b912409cfff4 100644
--- a/Source/cmake/OptionsGTK.cmake
+++ b/Source/cmake/OptionsGTK.cmake
@@ -9,6 +9,10 @@ set(USER_AGENT_BRANDING "" CACHE STRING "Branding to add to user agent string")
 
 # Update Source/WTF/wtf/Platform.h to match required GLib versions.
 find_package(GLib 2.70.0 REQUIRED COMPONENTS GioUnix Thread Module)
+
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+
 find_package(Cairo 1.16.0 REQUIRED)
 find_package(LibGcrypt 1.7.0 REQUIRED)
 find_package(Soup3 3.0.0 REQUIRED)
@@ -72,6 +76,10 @@ WEBKIT_OPTION_DEFINE(USE_SYSTEM_UNIFDEF "Whether to use a system-provided unifde
 
 WEBKIT_OPTION_DEPEND(USE_SYSTEM_SYSPROF_CAPTURE USE_SYSPROF_CAPTURE)
 
+# Playwright begin.
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(USE_SYSTEM_SYSPROF_CAPTURE PRIVATE OFF)
+# Playwright end.
+
 SET_AND_EXPOSE_TO_BUILD(ENABLE_DEVELOPER_MODE ${DEVELOPER_MODE})
 if (DEVELOPER_MODE)
     WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_API_TESTS PRIVATE ON)
@@ -150,6 +158,21 @@ WEBKIT_OPTION_DEFAULT_PORT_VALUE(USE_SKIA PRIVATE ON)
 
 WEBKIT_OPTION_DEPEND(ENABLE_GPU_PROCESS USE_GBM)
 
+# Playwright begin.
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_GAMEPAD PUBLIC OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_PDFJS PUBLIC OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_MEDIA_RECORDER PRIVATE OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_THUNDER PRIVATE OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR PRIVATE OFF)
+
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_APPLICATION_MANIFEST PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CURSOR_VISIBILITY PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DEVICE_ORIENTATION PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_GAMEPAD PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_SPEECH_SYNTHESIS PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_POINTER_LOCK PRIVATE ON)
+# Playwright end.
+
 include(GStreamerDependencies)
 
 WEBKIT_OPTION_DEPEND(ENABLE_WEBXR ENABLE_GAMEPAD)
diff --git a/Source/cmake/OptionsWPE.cmake b/Source/cmake/OptionsWPE.cmake
index 9be932f3cc9a86cc27ff355409f96a8e0501eba0..f89f186c5986a702b25bf844be36fbe293cbf43b 100644
--- a/Source/cmake/OptionsWPE.cmake
+++ b/Source/cmake/OptionsWPE.cmake
@@ -37,6 +37,9 @@ else ()
     set(ENABLE_MEDIA_SESSION_DEFAULT ON)
 endif ()
 
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+
 WEBKIT_OPTION_BEGIN()
 
 SET_AND_EXPOSE_TO_BUILD(ENABLE_DEVELOPER_MODE ${DEVELOPER_MODE})
@@ -94,6 +97,22 @@ WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR PRIVATE ${ENABLE_EXPERIMENTAL_FEAT
 WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR_HIT_TEST PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
 WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR_LAYERS PRIVATE ${ENABLE_EXPERIMENTAL_FEATURES})
 
+# Playwright begin.
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_MINIBROWSER PUBLIC ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_PDFJS PUBLIC OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_MEDIA_RECORDER PRIVATE OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_THUNDER PRIVATE OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WEBXR PRIVATE OFF)
+
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_APPLICATION_MANIFEST PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_CURSOR_VISIBILITY PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DARK_MODE_CSS PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DRAG_SUPPORT PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DEVICE_ORIENTATION PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_SPEECH_SYNTHESIS PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_POINTER_LOCK PRIVATE ON)
+# Playwright end.
+
 # Public options specific to the WPE port. Do not add any options here unless
 # there is a strong reason we should support changing the value of the option,
 # and the option is not relevant to other WebKit ports.
@@ -132,6 +151,11 @@ WEBKIT_OPTION_DEPEND(ENABLE_DOCUMENTATION ENABLE_INTROSPECTION)
 WEBKIT_OPTION_DEPEND(ENABLE_WPE_QT_API ENABLE_WPE_PLATFORM)
 WEBKIT_OPTION_DEPEND(USE_SYSTEM_SYSPROF_CAPTURE USE_SYSPROF_CAPTURE)
 
+# Playwright begin.
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_WPE_QT_API PUBLIC OFF)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(USE_SYSTEM_SYSPROF_CAPTURE PRIVATE OFF)
+# Playwright end.
+
 if (CMAKE_SYSTEM_NAME MATCHES "Linux")
     WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_BUBBLEWRAP_SANDBOX PUBLIC ON)
     WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_MEMORY_SAMPLER PRIVATE ON)
diff --git a/Source/cmake/OptionsWin.cmake b/Source/cmake/OptionsWin.cmake
index da6c3b5fd4901b64c616d2b38cb1d9b70c810e71..99380f834b6b3ac5b4afdf68dfa002c0cdf606d3 100644
--- a/Source/cmake/OptionsWin.cmake
+++ b/Source/cmake/OptionsWin.cmake
@@ -113,6 +113,14 @@ WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_FTPDIR PRIVATE OFF)
 SET_AND_EXPOSE_TO_BUILD(ENABLE_WEBDRIVER_KEYBOARD_INTERACTIONS ON)
 SET_AND_EXPOSE_TO_BUILD(ENABLE_WEBDRIVER_MOUSE_INTERACTIONS ON)
 
+# Plawright begin
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DARK_MODE_CSS PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_DEVICE_ORIENTATION PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_NOTIFICATIONS PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_POINTER_LOCK PRIVATE ON)
+WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_TOUCH_EVENTS PRIVATE ON)
+# Playwright end
+
 WEBKIT_OPTION_END()
 
 set(USE_ANGLE_EGL ON)
diff --git a/Source/cmake/WebKitCompilerFlags.cmake b/Source/cmake/WebKitCompilerFlags.cmake
index 5a9e12cee71f979e15f686f89a9bec6d992a2faf..1a79d778c8a36050fc2b0b42388bb050fa612d49 100644
--- a/Source/cmake/WebKitCompilerFlags.cmake
+++ b/Source/cmake/WebKitCompilerFlags.cmake
@@ -152,7 +152,7 @@ macro(WEBKIT_ADD_TARGET_CXX_FLAGS _target)
 endmacro()
 
 
-option(DEVELOPER_MODE_FATAL_WARNINGS "Build with warnings as errors if DEVELOPER_MODE is also enabled" ON)
+option(DEVELOPER_MODE_FATAL_WARNINGS "Build with warnings as errors if DEVELOPER_MODE is also enabled" OFF)
 set(DEVELOPER_MODE_CXX_FLAGS)
 if (DEVELOPER_MODE AND DEVELOPER_MODE_FATAL_WARNINGS)
     if (MSVC)
diff --git a/Tools/DumpRenderTree/DerivedSources.make b/Tools/DumpRenderTree/DerivedSources.make
index e5859ed734046a3dc37a5c184e8a43fc9f858004..1235b8315d2ce5d6990474e525857770a7660e61 100644
--- a/Tools/DumpRenderTree/DerivedSources.make
+++ b/Tools/DumpRenderTree/DerivedSources.make
@@ -73,8 +73,8 @@ $(IDL_FILE_NAMES_LIST) : $(UICONTEXT_INTERFACES:%=%.idl)
 JS%.h JS%.cpp : %.idl $(SCRIPTS) $(IDL_ATTRIBUTES_FILE) $(IDL_FILE_NAMES_LIST) $(FEATURE_AND_PLATFORM_FLAGS_RESPONSE_FILE)
 	@echo Generating bindings for $*...
 	$(PERL) -I $(WebCoreScripts) -I $(UISCRIPTCONTEXT_DIR) -I $(DumpRenderTree)/Bindings $(WebCoreScripts)/generate-bindings.pl --defines "$(FEATURE_AND_PLATFORM_DEFINES)" --idlFileNamesList $(IDL_FILE_NAMES_LIST) --outputDir . --generator DumpRenderTree --idlAttributesFile $(IDL_ATTRIBUTES_FILE) $<
-#
 
+#
 
 WEB_PREFERENCES_GENERATED_FILES = \
     TestOptionsGeneratedWebKitLegacyKeyMapping.cpp \
diff --git a/Tools/MiniBrowser/gtk/BrowserTab.c b/Tools/MiniBrowser/gtk/BrowserTab.c
index 0e7f9c7bb7ccb52ccb579ff464a5904aaab2baed..65999b8d7c2dfd1aecc58fe93504aa9cb6965dd8 100644
--- a/Tools/MiniBrowser/gtk/BrowserTab.c
+++ b/Tools/MiniBrowser/gtk/BrowserTab.c
@@ -118,19 +118,38 @@ static void isLoadingChanged(WebKitWebView *webView, GParamSpec *paramSpec, Brow
     }
 }
 
+static gboolean response_policy_decision_can_show(WebKitResponsePolicyDecision *responseDecision)
+{
+    if (webkit_response_policy_decision_is_mime_type_supported(responseDecision))
+        return TRUE;
+    WebKitURIResponse* response = webkit_response_policy_decision_get_response(responseDecision);
+    const guint statusCode = webkit_uri_response_get_status_code(response);
+    if (statusCode == 205 || statusCode == 204)
+        return TRUE;
+    const gchar* mimeType = webkit_uri_response_get_mime_type(response);
+    if (!mimeType || mimeType[0] == '\0')
+        return FALSE;
+    // https://bugs.webkit.org/show_bug.cgi?id=277204 / Ubuntu 24.04 / glib 2.76+ or higher
+    if (g_ascii_strcasecmp(mimeType, "application/x-zerosize") == 0)
+        return TRUE;
+    return FALSE;
+}
+
 static gboolean decidePolicy(WebKitWebView *webView, WebKitPolicyDecision *decision, WebKitPolicyDecisionType decisionType, BrowserTab *tab)
 {
     if (decisionType != WEBKIT_POLICY_DECISION_TYPE_RESPONSE)
         return FALSE;
 
     WebKitResponsePolicyDecision *responseDecision = WEBKIT_RESPONSE_POLICY_DECISION(decision);
-    if (webkit_response_policy_decision_is_mime_type_supported(responseDecision))
-        return FALSE;
-
     if (!webkit_response_policy_decision_is_main_frame_main_resource(responseDecision))
         return FALSE;
 
-    webkit_policy_decision_download(decision);
+    if (!response_policy_decision_can_show(responseDecision)) {
+        webkit_policy_decision_download(decision);
+        return TRUE;
+    }
+
+    webkit_policy_decision_use(decision);
     return TRUE;
 }
 
@@ -181,6 +200,11 @@ static void loadChanged(WebKitWebView *webView, WebKitLoadEvent loadEvent, Brows
 #endif
 }
 
+static gboolean loadFailed()
+{
+    return TRUE;
+}
+
 static GtkWidget *createInfoBarQuestionMessage(const char *title, const char *text)
 {
     GtkWidget *dialog = gtk_info_bar_new_with_buttons("No", GTK_RESPONSE_NO, "Yes", GTK_RESPONSE_YES, NULL);
@@ -806,6 +830,7 @@ static void browserTabConstructed(GObject *gObject)
     g_signal_connect(tab->webView, "notify::is-loading", G_CALLBACK(isLoadingChanged), tab);
     g_signal_connect(tab->webView, "decide-policy", G_CALLBACK(decidePolicy), tab);
     g_signal_connect(tab->webView, "load-changed", G_CALLBACK(loadChanged), tab);
+    g_signal_connect(tab->webView, "load-failed", G_CALLBACK(loadFailed), tab);
     g_signal_connect(tab->webView, "load-failed-with-tls-errors", G_CALLBACK(loadFailedWithTLSerrors), tab);
     g_signal_connect(tab->webView, "permission-request", G_CALLBACK(decidePermissionRequest), tab);
     g_signal_connect(tab->webView, "run-color-chooser", G_CALLBACK(runColorChooserCallback), tab);
@@ -861,6 +886,9 @@ static char *getInternalURI(const char *uri)
     if (g_str_has_prefix(uri, "about:") && !g_str_equal(uri, "about:blank"))
         return g_strconcat(BROWSER_ABOUT_SCHEME, uri + strlen ("about"), NULL);
 
+    if (!g_str_has_prefix(uri, "http://") && !g_str_has_prefix(uri, "https://") && !g_str_has_prefix(uri, "file://"))
+        return g_strconcat("http://", uri, NULL);
+
     return g_strdup(uri);
 }
 
diff --git a/Tools/MiniBrowser/gtk/BrowserWindow.c b/Tools/MiniBrowser/gtk/BrowserWindow.c
index d39b809a879babcdbbf4b5f7687204df5ccc43f3..a784ea4e693332aee731c4b8949ddb33af7dff9f 100644
--- a/Tools/MiniBrowser/gtk/BrowserWindow.c
+++ b/Tools/MiniBrowser/gtk/BrowserWindow.c
@@ -73,7 +73,7 @@ struct _BrowserWindowClass {
     GtkApplicationWindowClass parent;
 };
 
-static const char *defaultWindowTitle = "WebKitGTK MiniBrowser";
+static const char *defaultWindowTitle = "🎭 Playwright";
 static const gdouble minimumZoomLevel = 0.5;
 static const gdouble maximumZoomLevel = 3;
 static const gdouble defaultZoomLevel = 1;
@@ -157,17 +157,11 @@ static void webViewURIChanged(WebKitWebView *webView, GParamSpec *pspec, Browser
 static void webViewTitleChanged(WebKitWebView *webView, GParamSpec *pspec, BrowserWindow *window)
 {
     const char *title = webkit_web_view_get_title(webView);
+    char *privateTitle = NULL;
     if (!title)
         title = defaultWindowTitle;
-    char *privateTitle = NULL;
-    if (webkit_web_view_is_controlled_by_automation(webView))
-        privateTitle = g_strdup_printf("[Automation] %s", title);
-#if GTK_CHECK_VERSION(3, 98, 0)
-    else if (webkit_network_session_is_ephemeral(webkit_web_view_get_network_session(webView)))
-#else
-    else if (webkit_web_view_is_ephemeral(webView))
-#endif
-        privateTitle = g_strdup_printf("[Private] %s", title);
+    else
+        privateTitle = g_strdup_printf("🎭 Playwright: %s", title);
     gtk_window_set_title(GTK_WINDOW(window), privateTitle ? privateTitle : title);
     g_free(privateTitle);
 }
@@ -524,8 +518,12 @@ static gboolean webViewDecidePolicy(WebKitWebView *webView, WebKitPolicyDecision
         return FALSE;
 
     WebKitNavigationAction *navigationAction = webkit_navigation_policy_decision_get_navigation_action(WEBKIT_NAVIGATION_POLICY_DECISION(decision));
-    if (webkit_navigation_action_get_navigation_type(navigationAction) != WEBKIT_NAVIGATION_TYPE_LINK_CLICKED
-        || webkit_navigation_action_get_mouse_button(navigationAction) != GDK_BUTTON_MIDDLE)
+    if (webkit_navigation_action_get_navigation_type(navigationAction) != WEBKIT_NAVIGATION_TYPE_LINK_CLICKED)
+        return FALSE;
+
+    guint modifiers = webkit_navigation_action_get_modifiers(navigationAction);
+    if (webkit_navigation_action_get_mouse_button(navigationAction) != GDK_BUTTON_MIDDLE &&
+        (webkit_navigation_action_get_mouse_button(navigationAction) != GDK_BUTTON_PRIMARY || (modifiers & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) == 0))
         return FALSE;
 
     /* Multiple tabs are not allowed in editor mode. */
@@ -1502,6 +1500,20 @@ static gboolean browserWindowDeleteEvent(GtkWidget *widget, GdkEventAny* event)
 }
 #endif
 
+static void zero_widget_measure (GtkWidget      *widget,
+                    GtkOrientation  orientation,
+                    int             for_size,
+                    int            *minimum_size,
+                    int            *natural_size,
+                    int            *minimum_baseline,
+                    int            *natural_baseline)
+{
+    *minimum_size = 10;
+    *natural_size = 10;
+    // *minimum_baseline = 10;
+    // *natural_baseline = 10;
+}
+
 static void browser_window_class_init(BrowserWindowClass *klass)
 {
     GObjectClass *gobjectClass = G_OBJECT_CLASS(klass);
@@ -1515,6 +1527,13 @@ static void browser_window_class_init(BrowserWindowClass *klass)
     GtkWidgetClass *widgetClass = GTK_WIDGET_CLASS(klass);
     widgetClass->delete_event = browserWindowDeleteEvent;
 #endif
+
+// Playwrigth begin
+// Override preferred (which is minimum :-) size to 0 so that we can
+// emulate arbitrary resolution.
+    GtkWidgetClass* browserWidgetClass = GTK_WIDGET_CLASS(klass);
+    browserWidgetClass->measure = zero_widget_measure;
+// Playwrigth end
 }
 
 /* Public API. */
diff --git a/Tools/MiniBrowser/gtk/BrowserWindow.h b/Tools/MiniBrowser/gtk/BrowserWindow.h
index 1fd07efb828b85b6d8def6c6cd92a0c11debfe1b..da9fac7975d477857ead2adb1d67108d51716d15 100644
--- a/Tools/MiniBrowser/gtk/BrowserWindow.h
+++ b/Tools/MiniBrowser/gtk/BrowserWindow.h
@@ -42,7 +42,7 @@ G_BEGIN_DECLS
 #define BROWSER_IS_WINDOW(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), BROWSER_TYPE_WINDOW))
 #define BROWSER_IS_WINDOW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),  BROWSER_TYPE_WINDOW))
 #define BROWSER_WINDOW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj),  BROWSER_TYPE_WINDOW, BrowserWindowClass))
-#define BROWSER_DEFAULT_URL            "http://www.webkitgtk.org/"
+#define BROWSER_DEFAULT_URL            "about:blank"
 #define BROWSER_ABOUT_SCHEME           "minibrowser-about"
 
 typedef struct _BrowserWindow        BrowserWindow;
diff --git a/Tools/MiniBrowser/gtk/main.c b/Tools/MiniBrowser/gtk/main.c
index dc20509081346978e0da4a7833f6d4ce733717ac..817bd32756f0c8279beb4c23bee4b1e6f2ded960 100644
--- a/Tools/MiniBrowser/gtk/main.c
+++ b/Tools/MiniBrowser/gtk/main.c
@@ -66,9 +66,15 @@ static char* timeZone;
 static gboolean enableITP;
 static gboolean exitAfterLoad;
 static gboolean webProcessCrashed;
+static gboolean inspectorPipe;
+static gint remoteDebuggingPort = -1;
+static gboolean headless;
+static gboolean noStartupWindow;
+static const char *userDataDir;
 static gboolean printVersion;
 static char *configFile;
 static GSettings *interfaceSettings;
+static GtkApplication *browserApplication = NULL;
 
 #if !GTK_CHECK_VERSION(3, 98, 0)
 static gboolean enableSandbox;
@@ -174,6 +180,11 @@ static const GOptionEntry commandLineOptions[] =
     { "time-zone", 't', 0, G_OPTION_ARG_STRING, &timeZone, "Set time zone", "TIMEZONE" },
     { "version", 'v', 0, G_OPTION_ARG_NONE, &printVersion, "Print the WebKitGTK version", NULL },
     { "config", 'C', 0, G_OPTION_ARG_FILENAME, &configFile, "Path to a configuration file", "PATH" },
+    { "inspector-pipe", 0, 0, G_OPTION_ARG_NONE, &inspectorPipe, "Open pipe connection to the remote inspector", NULL },
+    { "remote-debugging-port", 0, 0, G_OPTION_ARG_INT, &remoteDebuggingPort, "Start remote debugging server on the specified port",  NULL },
+    { "user-data-dir", 0, 0, G_OPTION_ARG_STRING, &userDataDir, "Default profile persistence folder location", NULL },
+    { "headless", 0, 0, G_OPTION_ARG_NONE, &headless, "Noop headless operation", NULL },
+    { "no-startup-window", 0, 0, G_OPTION_ARG_NONE, &noStartupWindow, "Do not open default page", NULL },
     { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &uriArguments, 0, "[URL…]" },
     { 0, 0, 0, 0, 0, 0, 0 }
 };
@@ -730,6 +741,64 @@ static void filterSavedCallback(WebKitUserContentFilterStore *store, GAsyncResul
     g_main_loop_quit(data->mainLoop);
 }
 
+static WebKitSettings* createPlaywrightSettings() {
+    WebKitSettings* webkitSettings = webkit_settings_new();
+    // FIXME(Playwright): in GTK4, WEBKIT_HARDWARE_ACCELERATION_POLICY_ALWAYS is the default, but the page content is just black in that case.
+    webkit_settings_set_hardware_acceleration_policy(webkitSettings, WEBKIT_HARDWARE_ACCELERATION_POLICY_NEVER);
+    return webkitSettings;
+}
+
+static WebKitWebContext *persistentWebContext = NULL;
+
+static WebKitWebView *createNewPage(WebKitBrowserInspector *browser_inspector, WebKitWebContext *context)
+{
+    if (context == NULL)
+        context = persistentWebContext;
+
+    WebKitWebView *newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
+        "web-context", context,
+        "settings", createPlaywrightSettings(),
+        "network-session", webkit_web_context_get_network_session_for_automation(context),
+        "is-controlled-by-automation", TRUE,
+        NULL));
+    GtkWidget *newWindow = browser_window_new(NULL, context, webkit_web_context_get_network_session_for_automation(context));
+    gtk_window_set_application(GTK_WINDOW(newWindow), browserApplication);
+    browser_window_append_view(BROWSER_WINDOW(newWindow), newWebView);
+    gtk_widget_grab_focus(GTK_WIDGET(newWebView));
+    gtk_widget_show(GTK_WIDGET(newWindow));
+    webkit_web_view_load_uri(newWebView, "about:blank");
+    return newWebView;
+}
+
+static void quitBroserApplication(WebKitBrowserInspector* browser_inspector)
+{
+    g_application_release(G_APPLICATION(browserApplication));
+}
+
+static void keepApplicationAliveUntilQuit(GApplication *application)
+{
+    // Reference the application, it will be released in quitBroserApplication.
+    g_application_hold(application);
+    WebKitBrowserInspector* browserInspector = webkit_browser_inspector_get_default();
+    g_signal_connect(browserInspector, "quit-application", G_CALLBACK(quitBroserApplication), NULL);
+}
+
+static void configureBrowserInspectorPipe()
+{
+    WebKitBrowserInspector* browserInspector = webkit_browser_inspector_get_default();
+    g_signal_connect(browserInspector, "create-new-page", G_CALLBACK(createNewPage), NULL);
+
+    webkit_browser_inspector_initialize_pipe(proxy, ignoreHosts);
+}
+
+static void configureBrowserInspectorPort()
+{
+    WebKitBrowserInspector* browserInspector = webkit_browser_inspector_get_default();
+    g_signal_connect(browserInspector, "create-new-page", G_CALLBACK(createNewPage), NULL);
+
+    webkit_browser_inspector_initialize_web_socket(remoteDebuggingPort, proxy, ignoreHosts);
+}
+
 static void startup(GApplication *application)
 {
     const char *actionAccels[] = {
@@ -788,22 +857,39 @@ static void setupDarkMode(GtkSettings *settings)
 
 static void activate(GApplication *application, WebKitSettings *webkitSettings)
 {
+    if (inspectorPipe)
+        configureBrowserInspectorPipe();
+    else if (remoteDebuggingPort != -1)
+        configureBrowserInspectorPort();
+
+    if (noStartupWindow) {
+        keepApplicationAliveUntilQuit(application);
+        g_clear_object(&webkitSettings);
+        return;
+    }
 #if GTK_CHECK_VERSION(3, 98, 0)
     WebKitWebContext *webContext = g_object_new(WEBKIT_TYPE_WEB_CONTEXT, "time-zone-override", timeZone, NULL);
     webkit_web_context_set_automation_allowed(webContext, automationMode);
     g_signal_connect(webContext, "automation-started", G_CALLBACK(automationStartedCallback), application);
 
     WebKitNetworkSession *networkSession;
-    if (automationMode)
-        networkSession = g_object_ref(webkit_web_context_get_network_session_for_automation(webContext));
-    else if (privateMode)
+    if (userDataDir) {
+        char *dataDirectory = g_build_filename(userDataDir, "data", NULL);
+        char *cacheDirectory = g_build_filename(userDataDir, "cache", NULL);
+        networkSession = webkit_network_session_new(dataDirectory, cacheDirectory);
+        g_free(dataDirectory);
+        g_free(cacheDirectory);
+        cookiesFile = g_build_filename(userDataDir, "cookies.txt", NULL);
+    } else if (inspectorPipe || remoteDebuggingPort != -1 || privateMode || automationMode) {
         networkSession = webkit_network_session_new_ephemeral();
-    else {
+    } else {
         g_autofree char *dataDirectory = profileDirectory ? g_build_filename(profileDirectory, "data", NULL) : g_build_filename(g_get_user_data_dir(), "webkitgtk-" WEBKITGTK_API_VERSION, "MiniBrowser", NULL);
         g_autofree char *cacheDirectory = profileDirectory ? g_build_filename(profileDirectory, "cache", NULL) : g_build_filename(g_get_user_cache_dir(), "webkitgtk-" WEBKITGTK_API_VERSION, "MiniBrowser", NULL);
         networkSession = webkit_network_session_new(dataDirectory, cacheDirectory);
     }
 
+    webkit_web_context_set_network_session_for_automation(webContext, networkSession);
+
     webkit_network_session_set_itp_enabled(networkSession, enableITP);
 
     if (!automationMode) {
@@ -838,9 +924,12 @@ static void activate(GApplication *application, WebKitSettings *webkitSettings)
     }
 #else
     WebKitWebsiteDataManager *manager;
-    if (privateMode || automationMode)
+    if (userDataDir) {
+        manager = webkit_website_data_manager_new("base-data-directory", userDataDir, "base-cache-directory", userDataDir, NULL);
+        cookiesFile = g_build_filename(userDataDir, "cookies.txt", NULL);
+    } else if (inspectorPipe || remoteDebuggingPort != -1 || privateMode || automationMode) {
         manager = webkit_website_data_manager_new_ephemeral();
-    else {
+    } else {
         g_autofree char *dataDirectory = profileDirectory ? g_build_filename(profileDirectory, "data", NULL) : g_build_filename(g_get_user_data_dir(), "webkitgtk-" WEBKITGTK_API_VERSION, "MiniBrowser", NULL);
         g_autofree char *cacheDirectory = profileDirectory ? g_build_filename(profileDirectory, "cache", NULL) : g_build_filename(g_get_user_cache_dir(), "webkitgtk-" WEBKITGTK_API_VERSION, "MiniBrowser", NULL);
         manager = webkit_website_data_manager_new("base-data-directory", dataDirectory, "base-cache-directory", cacheDirectory, NULL);
@@ -888,6 +977,7 @@ static void activate(GApplication *application, WebKitSettings *webkitSettings)
     // Enable the favicon database.
     webkit_web_context_set_favicon_database_directory(webContext, NULL);
 #endif
+    persistentWebContext = webContext;
 
     webkit_web_context_register_uri_scheme(webContext, BROWSER_ABOUT_SCHEME, (WebKitURISchemeRequestCallback)aboutURISchemeRequestCallback, NULL, NULL);
 
@@ -952,9 +1042,7 @@ static void activate(GApplication *application, WebKitSettings *webkitSettings)
                 if (exitAfterLoad)
                     exitAfterWebViewLoadFinishes(webView, application);
             }
-            gchar *url = argumentToURL(uriArguments[i]);
-            webkit_web_view_load_uri(webView, url);
-            g_free(url);
+            webkit_web_view_load_uri(webView, uriArguments[i]);
         }
     } else {
         WebKitWebView *webView = createBrowserTab(mainWindow, webkitSettings, userContentManager, defaultWebsitePolicies);
@@ -1004,7 +1092,7 @@ int main(int argc, char *argv[])
     g_option_context_add_group(context, gst_init_get_option_group());
 #endif
 
-    WebKitSettings *webkitSettings = webkit_settings_new();
+    WebKitSettings *webkitSettings = createPlaywrightSettings();
     webkit_settings_set_enable_developer_extras(webkitSettings, TRUE);
     webkit_settings_set_enable_webgl(webkitSettings, TRUE);
     webkit_settings_set_enable_media_stream(webkitSettings, TRUE);
@@ -1056,9 +1144,11 @@ int main(int argc, char *argv[])
     }
 
     GtkApplication *application = gtk_application_new("org.webkitgtk.MiniBrowser", G_APPLICATION_NON_UNIQUE);
+    browserApplication = application;
     g_signal_connect(application, "startup", G_CALLBACK(startup), NULL);
     g_signal_connect(application, "activate", G_CALLBACK(activate), webkitSettings);
     g_application_run(G_APPLICATION(application), 0, NULL);
+    browserApplication = NULL;
     g_object_unref(application);
 
     g_clear_object(&interfaceSettings);
diff --git a/Tools/MiniBrowser/wpe/main.cpp b/Tools/MiniBrowser/wpe/main.cpp
index c8cd8719368bc3be7b97b315c64162ced5b7c351..7a7b2d3b0ebc31690f5877694118ddfc311ee5cf 100644
--- a/Tools/MiniBrowser/wpe/main.cpp
+++ b/Tools/MiniBrowser/wpe/main.cpp
@@ -56,6 +56,9 @@ static gboolean privateMode;
 static const char* profileDirectory;
 static gboolean automationMode;
 static gboolean ignoreTLSErrors;
+static gboolean inspectorPipe;
+static gboolean noStartupWindow;
+static const char* userDataDir;
 static const char* contentFilter;
 static const char* cookiesFile;
 static const char* cookiesPolicy;
@@ -141,6 +144,9 @@ static const GOptionEntry commandLineOptions[] =
     { "config-file", 0, 0, G_OPTION_ARG_FILENAME, &configFile, "Config file to load for settings", "FILE" },
     { "size", 's', 0, G_OPTION_ARG_CALLBACK, reinterpret_cast<gpointer>(parseWindowSize), "Specify the window size to use, e.g. --size=\"800x600\"", nullptr },
     { "version", 'v', 0, G_OPTION_ARG_NONE, &printVersion, "Print the WPE version", nullptr },
+    { "inspector-pipe", 'v', 0, G_OPTION_ARG_NONE, &inspectorPipe, "Expose remote debugging protocol over pipe", nullptr },
+    { "user-data-dir", 0, 0, G_OPTION_ARG_STRING, &userDataDir, "Default profile persistence folder location", "FILE" },
+    { "no-startup-window", 0, 0, G_OPTION_ARG_NONE, &noStartupWindow, "Do not open default page", nullptr },
     { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &uriArguments, nullptr, "[URL]" },
     { nullptr, 0, 0, G_OPTION_ARG_NONE, nullptr, nullptr, nullptr }
 };
@@ -331,15 +337,38 @@ static void filterSavedCallback(WebKitUserContentFilterStore *store, GAsyncResul
     g_main_loop_quit(data->mainLoop);
 }
 
+static gboolean webViewLoadFailed()
+{
+    return TRUE;
+}
+
 static void webViewClose(WebKitWebView* webView, gpointer user_data)
 {
     // Hash table key delete func takes care of unref'ing the view
     g_hash_table_remove(openViews, webView);
-    if (!g_hash_table_size(openViews))
+    if (!g_hash_table_size(openViews) && user_data)
         g_application_quit(G_APPLICATION(user_data));
 }
 
-static WebKitWebView* createWebView(WebKitWebView* webView, WebKitNavigationAction*, gpointer user_data)
+static gboolean scriptDialog(WebKitWebView*, WebKitScriptDialog* dialog, gpointer)
+{
+    if (inspectorPipe)
+        webkit_script_dialog_ref(dialog);
+    return TRUE;
+}
+
+static gboolean scriptDialogHandled(WebKitWebView*, WebKitScriptDialog* dialog, gpointer)
+{
+    if (inspectorPipe)
+        webkit_script_dialog_unref(dialog);
+    return TRUE;
+}
+
+static gboolean webViewDecidePolicy(WebKitWebView *webView, WebKitPolicyDecision *decision, WebKitPolicyDecisionType decisionType, gpointer);
+
+static WebKitWebView* createWebView(WebKitWebView* webView, WebKitNavigationAction*, gpointer user_data);
+
+static WebKitWebView* createWebViewImpl(WebKitWebView* webView, WebKitWebContext *webContext, gpointer user_data)
 {
 #if defined(USE_LIBWPE) && USE_LIBWPE
     auto backend = createViewBackend(defaultWindowWidthLegacyAPI, defaultWindowHeightLegacyAPI);
@@ -356,14 +385,31 @@ static WebKitWebView* createWebView(WebKitWebView* webView, WebKitNavigationActi
     }
 #endif
 
-    auto* newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
+// Playwright begin
+    if (headlessMode) {
+        webkit_web_view_backend_set_screenshot_callback(viewBackend,
+            [](gpointer data) {
+                return static_cast<WPEToolingBackends::HeadlessViewBackend*>(data)->snapshot();
+            });
+    }
+// Playwright end
+    WebKitWebView* newWebView;
+    if (webView) {
+        newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
 #if defined(USE_LIBWPE) && USE_LIBWPE
-        "backend", viewBackend,
+            "backend", viewBackend,
 #endif
-        "related-view", webView,
-        "settings", webkit_web_view_get_settings(webView),
-        "user-content-manager", webkit_web_view_get_user_content_manager(webView),
-        nullptr));
+            "related-view", webView,
+            nullptr));
+    } else {
+        newWebView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
+#if defined(USE_LIBWPE) && USE_LIBWPE
+            "backend", viewBackend,
+#endif
+            "web-context", webContext,
+            "is-controlled-by-automation", TRUE,
+            nullptr));
+    }
 
 #if ENABLE_WPE_PLATFORM
     if (auto* wpeView = webkit_web_view_get_wpe_view(newWebView)) {
@@ -375,9 +421,13 @@ static WebKitWebView* createWebView(WebKitWebView* webView, WebKitNavigationActi
 
     g_signal_connect(newWebView, "create", G_CALLBACK(createWebView), user_data);
     g_signal_connect(newWebView, "close", G_CALLBACK(webViewClose), user_data);
-
+// Playwright begin
+    g_signal_connect(newWebView, "load-failed", G_CALLBACK(webViewLoadFailed), nullptr);
+    g_signal_connect(newWebView, "script-dialog", G_CALLBACK(scriptDialog), nullptr);
+    g_signal_connect(newWebView, "script-dialog-handled", G_CALLBACK(scriptDialogHandled), nullptr);
+    g_signal_connect(newWebView, "decide-policy", G_CALLBACK(webViewDecidePolicy), nullptr);
+// Playwright end
     g_hash_table_add(openViews, newWebView);
-
     return newWebView;
 }
 
@@ -468,24 +518,112 @@ static void loadConfigFile(WebKitSettings* webkitSettings
 }
 
 #if defined(USE_LIBWPE) && USE_LIBWPE
+static WebKitWebView* createWebView(WebKitWebView* webView, WebKitNavigationAction*, gpointer user_data)
+{
+    return createWebViewImpl(webView, nullptr, user_data);
+}
+
+inline bool response_policy_decision_can_show(WebKitResponsePolicyDecision* responseDecision)
+{
+    if (webkit_response_policy_decision_is_mime_type_supported(responseDecision))
+        return true;
+    auto response = webkit_response_policy_decision_get_response(responseDecision);
+    const auto statusCode = webkit_uri_response_get_status_code(response);
+    if (statusCode == 205 || statusCode == 204)
+        return true;
+    const gchar* mimeType = webkit_uri_response_get_mime_type(response);
+    if (!mimeType || mimeType[0] == '\0')
+        return false;
+    // https://bugs.webkit.org/show_bug.cgi?id=277204 / Ubuntu 24.04 / glib 2.76+ or higher
+    if (g_ascii_strcasecmp(mimeType, "application/x-zerosize") == 0)
+        return true;
+    return false;
+}
+
+static gboolean webViewDecidePolicy(WebKitWebView *webView, WebKitPolicyDecision *decision, WebKitPolicyDecisionType decisionType, gpointer user_data)
+{
+    if (decisionType == WEBKIT_POLICY_DECISION_TYPE_RESPONSE) {
+        WebKitResponsePolicyDecision *responseDecision = WEBKIT_RESPONSE_POLICY_DECISION(decision);
+        if (!webkit_response_policy_decision_is_main_frame_main_resource(responseDecision))
+            return FALSE;
+
+        if (!response_policy_decision_can_show(responseDecision)) {
+            webkit_policy_decision_download(decision);
+            return TRUE;
+        }
+
+        webkit_policy_decision_use(decision);
+        return TRUE;
+    }
+
+    if (decisionType != WEBKIT_POLICY_DECISION_TYPE_NAVIGATION_ACTION)
+        return FALSE;
+
+    WebKitNavigationAction *navigationAction = webkit_navigation_policy_decision_get_navigation_action(WEBKIT_NAVIGATION_POLICY_DECISION(decision));
+    if (webkit_navigation_action_get_navigation_type(navigationAction) != WEBKIT_NAVIGATION_TYPE_LINK_CLICKED)
+        return FALSE;
+
+    guint modifiers = webkit_navigation_action_get_modifiers(navigationAction);
+    if (webkit_navigation_action_get_mouse_button(navigationAction) != 2 /* GDK_BUTTON_MIDDLE */ &&
+        (webkit_navigation_action_get_mouse_button(navigationAction) != 1 /* GDK_BUTTON_PRIMARY */ || (modifiers & (wpe_input_keyboard_modifier_control | wpe_input_keyboard_modifier_shift)) == 0))
+        return FALSE;
+
+    /* Open a new tab if link clicked with the middle button, shift+click or ctrl+click. */
+    WebKitWebView* newWebView = createWebViewImpl(nullptr, webkit_web_view_get_context(webView), user_data);
+    webkit_web_view_load_request(newWebView, webkit_navigation_action_get_request(navigationAction));
+
+    webkit_policy_decision_ignore(decision);
+    return TRUE;
+}
+
+static WebKitWebContext *persistentWebContext = NULL;
+
+static WebKitWebView* createNewPage(WebKitBrowserInspector*, WebKitWebContext *webContext)
+{
+    if (!webContext)
+        webContext = persistentWebContext;
+    WebKitWebView* webView = createWebViewImpl(nullptr, webContext, nullptr);
+    webkit_web_view_load_uri(webView, "about:blank");
+    return webView;
+}
+
+static void quitBroserApplication(WebKitBrowserInspector*, gpointer data)
+{
+    GApplication* application = static_cast<GApplication*>(data);
+    g_application_quit(application);
+}
+
+static void configureBrowserInspector(GApplication* application)
+{
+    WebKitBrowserInspector* browserInspector = webkit_browser_inspector_get_default();
+    g_signal_connect(browserInspector, "create-new-page", G_CALLBACK(createNewPage), NULL);
+    g_signal_connect(browserInspector, "quit-application", G_CALLBACK(quitBroserApplication), application);
+    webkit_browser_inspector_initialize_pipe(proxy, ignoreHosts);
+}
+
 static void activate(GApplication* application, WPEToolingBackends::ViewBackend* backend)
 #else
 static void activate(GApplication* application, gpointer)
 #endif
 {
     g_application_hold(application);
+    if (noStartupWindow)
+        return;
 #if ENABLE_2022_GLIB_API
     WebKitNetworkSession* networkSession = nullptr;
     if (!automationMode) {
-        if (privateMode)
+        if (userDataDir) {
+            networkSession = webkit_network_session_new(userDataDir, userDataDir);
+            cookiesFile = g_build_filename(userDataDir, "cookies.txt", nullptr);
+        } else if (inspectorPipe || privateMode || automationMode) {
             networkSession = webkit_network_session_new_ephemeral();
-        else if (profileDirectory) {
+        } else if (profileDirectory) {
             g_autofree char* dataDirectory = g_build_filename(profileDirectory, "data", nullptr);
             g_autofree char* cacheDirectory = g_build_filename(profileDirectory, "cache", nullptr);
             networkSession = webkit_network_session_new(dataDirectory, cacheDirectory);
-        } else
+        } else {
             networkSession = webkit_network_session_new(nullptr, nullptr);
-
+        }
         webkit_network_session_set_itp_enabled(networkSession, enableITP);
 
         if (proxy) {
@@ -512,19 +650,22 @@ static void activate(GApplication* application, gpointer)
             webkit_cookie_manager_set_persistent_storage(cookieManager, cookiesFile, storageType);
         }
     }
-
     auto* webContext = WEBKIT_WEB_CONTEXT(g_object_new(WEBKIT_TYPE_WEB_CONTEXT, "time-zone-override", timeZone, nullptr));
+    webkit_web_context_set_network_session_for_automation(webContext, networkSession);
 #else
-    WebKitWebsiteDataManager* manager;
-    if (privateMode || automationMode)
+    WebKitWebsiteDataManager *manager;
+    if (userDataDir) {
+        manager = webkit_website_data_manager_new("base-data-directory", userDataDir, "base-cache-directory", userDataDir, NULL);
+        cookiesFile = g_build_filename(userDataDir, "cookies.txt", NULL);
+    } else if (inspectorPipe || privateMode || automationMode) {
         manager = webkit_website_data_manager_new_ephemeral();
-    else if (profileDirectory) {
+    } else if (profileDirectory) {
         g_autofree char* dataDirectory = g_build_filename(profileDirectory, "data", nullptr);
         g_autofree char* cacheDirectory = g_build_filename(profileDirectory, "cache", nullptr);
         webkit_website_data_manager_new("base-data-directory", dataDirectory, "base-cache-directory", cacheDirectory, nullptr);
-    } else
-        webkit_website_data_manager_new(nullptr);
-
+    } else {
+        manager = webkit_website_data_manager_new(NULL);
+    }
     webkit_website_data_manager_set_itp_enabled(manager, enableITP);
 
     if (proxy) {
@@ -555,6 +696,7 @@ static void activate(GApplication* application, gpointer)
     }
 #endif
 
+    persistentWebContext = webContext;
     g_autoptr(WebKitUserContentManager) userContentManager = nullptr;
     if (contentFilter) {
         g_autoptr(GFile) contentFilterFile = g_file_new_for_commandline_arg(contentFilter);
@@ -637,6 +779,15 @@ static void activate(GApplication* application, gpointer)
         "autoplay", WEBKIT_AUTOPLAY_ALLOW,
         nullptr);
 
+// Playwright begin
+    if (headlessMode) {
+        webkit_web_view_backend_set_screenshot_callback(viewBackend,
+            [](gpointer data) {
+                return static_cast<WPEToolingBackends::HeadlessViewBackend*>(data)->snapshot();
+            });
+    }
+// Playwright end
+
     auto* webView = WEBKIT_WEB_VIEW(g_object_new(WEBKIT_TYPE_WEB_VIEW,
 #if defined(USE_LIBWPE) && USE_LIBWPE
         "backend", viewBackend,
@@ -699,12 +850,16 @@ static void activate(GApplication* application, gpointer)
 #endif
     }
 
-    openViews = g_hash_table_new_full(nullptr, nullptr, g_object_unref, nullptr);
-
     g_signal_connect(webContext, "automation-started", G_CALLBACK(automationStartedCallback), webView);
     g_signal_connect(webView, "permission-request", G_CALLBACK(decidePermissionRequest), nullptr);
     g_signal_connect(webView, "create", G_CALLBACK(createWebView), application);
     g_signal_connect(webView, "close", G_CALLBACK(webViewClose), application);
+// Playwright begin
+    g_signal_connect(webView, "load-failed", G_CALLBACK(webViewLoadFailed), nullptr);
+    g_signal_connect(webView, "script-dialog", G_CALLBACK(scriptDialog), nullptr);
+    g_signal_connect(webView, "script-dialog-handled", G_CALLBACK(scriptDialogHandled), nullptr);
+    g_signal_connect(webView, "decide-policy", G_CALLBACK(webViewDecidePolicy), nullptr);
+// Playwright end
     g_hash_table_add(openViews, webView);
 
     WebKitColor color;
@@ -712,16 +867,11 @@ static void activate(GApplication* application, gpointer)
         webkit_web_view_set_background_color(webView, &color);
 
     if (uriArguments) {
-        const char* uri = uriArguments[0];
-        if (g_str_equal(uri, "about:gpu"))
-            uri = "webkit://gpu";
-
-        GFile* file = g_file_new_for_commandline_arg(uri);
-        char* url = g_file_get_uri(file);
-        g_object_unref(file);
-        webkit_web_view_load_uri(webView, url);
-        g_free(url);
-    } else if (!automationMode)
+        // Playwright: avoid weird url transformation like http://trac.webkit.org/r240840
+        webkit_web_view_load_uri(webView, uriArguments[0]);
+    } else if (automationMode || inspectorPipe)
+        webkit_web_view_load_uri(webView, "about:blank");
+    else
         webkit_web_view_load_uri(webView, "https://wpewebkit.org");
 
     g_object_unref(webContext);
@@ -816,12 +966,18 @@ int main(int argc, char *argv[])
     }
 #endif
 
+    openViews = g_hash_table_new_full(nullptr, nullptr, g_object_unref, nullptr);
+
     GApplication* application = g_application_new("org.wpewebkit.MiniBrowser", G_APPLICATION_NON_UNIQUE);
 #if defined(USE_LIBWPE) && USE_LIBWPE
     g_signal_connect(application, "activate", G_CALLBACK(activate), backend.release());
 #else
     g_signal_connect(application, "activate", G_CALLBACK(activate), nullptr);
 #endif
+
+    if (inspectorPipe)
+        configureBrowserInspector(application);
+
     g_application_run(application, 0, nullptr);
     g_object_unref(application);
 
diff --git a/Tools/PlatformWin.cmake b/Tools/PlatformWin.cmake
index 1067b31bc989748dfcc5502209d36d001b9b239e..7629263fb8bc93dca6dfc01c75eed8d2921fce1f 100644
--- a/Tools/PlatformWin.cmake
+++ b/Tools/PlatformWin.cmake
@@ -1,3 +1,7 @@
 if (ENABLE_MINIBROWSER)
     add_subdirectory(MiniBrowser/win)
 endif ()
+
+if (ENABLE_WEBKIT)
+    add_subdirectory(Playwright/win)
+endif ()
diff --git a/Tools/Scripts/generate-bundle b/Tools/Scripts/generate-bundle
index 2050bc1c4e2f94461cfe25dbc53762afdc6b9f53..cd43f62318d661bf2558a1b8005f37de19eb0f15 100755
--- a/Tools/Scripts/generate-bundle
+++ b/Tools/Scripts/generate-bundle
@@ -41,7 +41,6 @@ sys.path.insert(0, os.path.join(top_level_directory, 'Tools', 'flatpak'))
 sys.path.insert(0, os.path.join(top_level_directory, 'Tools', 'jhbuild'))
 sys.path.insert(0, os.path.join(top_level_directory, 'Tools', 'Scripts', 'webkitpy'))
 import jhbuildutils
-import flatpakutils
 from binary_bundling.ldd import SharedObjectResolver
 from binary_bundling.bundle import BinaryBundler
 
@@ -896,7 +895,7 @@ class BundleCreator(object):
                 _log.info('Copy basic GTK icons.')
                 icons_target_dir = os.path.join(target_sys_share_dir, 'icons')
                 os.makedirs(icons_target_dir)
-                gtk_icon_basedir = '/run/host/share/icons' if flatpakutils.is_sandboxed() else '/usr/share/icons'
+                gtk_icon_basedir = '/usr/share/icons'
                 gtk_target_icon_dir = os.path.join(icons_target_dir, 'hicolor')
                 gtk_icon_dirs_copied = 0
                 for gtk_icon_theme in ['Adwaita', 'hicolor', 'gnome']:
@@ -975,9 +974,7 @@ def main():
     parser.add_argument('--builder-name', action='store', dest='builder_name')
     options = parser.parse_args()
 
-    flatpakutils.run_in_sandbox_if_available([sys.argv[0], '--flatpak-' + options.platform] + sys.argv[1:])
-    if not flatpakutils.is_sandboxed():
-        jhbuildutils.enter_jhbuild_environment_if_available(options.platform)
+    jhbuildutils.enter_jhbuild_environment_if_available(options.platform)
 
     configure_logging(options.log_level)
     bundle_creator = BundleCreator(options.configuration, options.platform, options.bundle_binary, options.syslibs, options.ldd,
diff --git a/Tools/WebKitTestRunner/CMakeLists.txt b/Tools/WebKitTestRunner/CMakeLists.txt
index ba703658cf8c56ad1768333b70938e67e8b36777..804487a7082024733d5012dcc62b9784c268bb55 100644
--- a/Tools/WebKitTestRunner/CMakeLists.txt
+++ b/Tools/WebKitTestRunner/CMakeLists.txt
@@ -99,6 +99,10 @@ set(TestRunnerInjectedBundle_PRIVATE_LIBRARIES
 )
 set(TestRunnerInjectedBundle_FRAMEWORKS ${WebKitTestRunner_FRAMEWORKS})
 
+if (NOT USE_SYSTEM_MALLOC)
+    list(APPEND WebKitTestRunnerInjectedBundle_LIBRARIES bmalloc)
+endif ()
+
 set(TestRunnerInjectedBundle_IDL_FILES
     "${WebKitTestRunner_DIR}/InjectedBundle/Bindings/AccessibilityController.idl"
     "${WebKitTestRunner_DIR}/InjectedBundle/Bindings/AccessibilityTextMarker.idl"
diff --git a/Tools/WebKitTestRunner/TestController.cpp b/Tools/WebKitTestRunner/TestController.cpp
index 9a61e6421c74f12bc565fad0f706cbb246bb784f..0a2bf450b5577c39c8e3645205d9e6f3ff470d93 100644
--- a/Tools/WebKitTestRunner/TestController.cpp
+++ b/Tools/WebKitTestRunner/TestController.cpp
@@ -792,6 +792,7 @@ PlatformWebView* TestController::createOtherPlatformWebView(PlatformWebView* par
         nullptr, // requestStorageAccessConfirm
         nullptr, // shouldAllowDeviceOrientationAndMotionAccess
         nullptr, // runWebAuthenticationPanel
+        0,       // handleJavaScriptDialog
         nullptr, // decidePolicyForSpeechRecognitionPermissionRequest
         nullptr, // decidePolicyForMediaKeySystemPermissionRequest
         nullptr, // queryPermission
@@ -1272,6 +1273,7 @@ void TestController::createWebViewWithOptions(const TestOptions& options)
         nullptr, // requestStorageAccessConfirm
         shouldAllowDeviceOrientationAndMotionAccess,
         runWebAuthenticationPanel,
+        0, // handleJavaScriptDialog
         nullptr, // decidePolicyForSpeechRecognitionPermissionRequest
         decidePolicyForMediaKeySystemPermissionRequest,
         queryPermission,
diff --git a/Tools/WebKitTestRunner/mac/EventSenderProxy.mm b/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
index 12a89be783e49c44edfca8d27f1fc3ddd24255e9..2ba827c958fa3558b0cd36f9e5b7537493fef362 100644
--- a/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
+++ b/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
@@ -1031,4 +1031,51 @@ void EventSenderProxy::scaleGestureEnd(double scale)
 
 #endif // ENABLE(MAC_GESTURE_EVENTS)
 
+#if ENABLE(TOUCH_EVENTS)
+void EventSenderProxy::addTouchPoint(int, int)
+{
+}
+
+void EventSenderProxy::updateTouchPoint(int, int, int)
+{
+}
+
+void EventSenderProxy::touchStart()
+{
+}
+
+void EventSenderProxy::touchMove()
+{
+}
+
+void EventSenderProxy::touchEnd()
+{
+}
+
+void EventSenderProxy::touchCancel()
+{
+}
+
+void EventSenderProxy::clearTouchPoints()
+{
+}
+
+void EventSenderProxy::releaseTouchPoint(int)
+{
+}
+
+void EventSenderProxy::cancelTouchPoint(int)
+{
+}
+
+void EventSenderProxy::setTouchPointRadius(int, int)
+{
+}
+
+void EventSenderProxy::setTouchModifier(WKEventModifiers, bool)
+{
+}
+#endif // ENABLE(TOUCH_EVENTS)
+
+
 } // namespace WTR
diff --git a/Tools/jhbuild/jhbuild-minimal.modules b/Tools/jhbuild/jhbuild-minimal.modules
index d526231f288ca82f4928d75ee9847b919b72bbfb..c904fac94196a8eb9888abf83b0db5ab69b3a993 100644
--- a/Tools/jhbuild/jhbuild-minimal.modules
+++ b/Tools/jhbuild/jhbuild-minimal.modules
@@ -69,8 +69,8 @@
   <cmake id="libwpe">
     <branch repo="github-tarball"
             module="WebPlatformForEmbedded/libwpe/releases/download/${version}/libwpe-${version}.tar.xz"
-            version="1.14.1"
-            hash="sha256:b1d0cdcf0f8dbb494e65b0f7913e357106da9a0d57f4fbb7b9d1238a6dbe9ade"/>
+            version="1.16.0"
+            hash="sha256:c7f3a3c6b3d006790d486dc7cceda2b6d2e329de07f33bc47dfc53f00f334b2a"/>
   </cmake>
 
   <meson id="wpebackend-fdo">
@@ -79,8 +79,8 @@
     </dependencies>
     <branch repo="github-tarball"
             module="Igalia/WPEBackend-fdo/releases/download/${version}/wpebackend-fdo-${version}.tar.xz"
-            version="1.14.2"
-            hash="sha256:93c9766ae9864eeaeaee2b0a74f22cbca08df42c1a1bdb55b086f2528e380d38">
+            version="1.14.3"
+            hash="sha256:10121842595a850291db3e82f3db0b9984df079022d386ce42c2b8508159dc6c">
     </branch>
   </meson>
 
@@ -188,7 +188,6 @@
   </meson>
 
   <meson id="libsoup" mesonargs="-Dgssapi=disabled -Dvapi=disabled -Dntlm=disabled -Dsysprof=disabled -Dautobahn=disabled -Dpkcs11_tests=disabled">
-    <pkg-config>libsoup-3.0.pc</pkg-config>
     <dependencies>
       <dep package="glib"/>
       <dep package="glib-networking"/>
@@ -196,8 +195,8 @@
     </dependencies>
     <branch module="GNOME/libsoup.git"
             repo="github.com"
-            tag="3.6.0"
-            version="3.6.0"
+            tag="3.6.5"
+            version="3.6.5"
             checkoutdir="libsoup-${version}"/>
   </meson>
 
diff --git a/Tools/wpe/backends/fdo/HeadlessViewBackendFdo.cpp b/Tools/wpe/backends/fdo/HeadlessViewBackendFdo.cpp
index 6186d81869dbbb346ec5a62f2bbba88e2320d5e7..25b5615339b74cd56042b89f723993023cbb58ca 100644
--- a/Tools/wpe/backends/fdo/HeadlessViewBackendFdo.cpp
+++ b/Tools/wpe/backends/fdo/HeadlessViewBackendFdo.cpp
@@ -175,28 +175,27 @@ void HeadlessViewBackend::updateSnapshot(PlatformBuffer exportedBuffer)
             return;
     }
 
-    auto info = SkImageInfo::MakeN32Premul(m_width, m_height, SkColorSpace::MakeSRGB());
+    uint32_t width = std::max(0, wl_shm_buffer_get_width(shmBuffer));
+    uint32_t height = std::max(0, wl_shm_buffer_get_height(shmBuffer));
+    if (!width || !height) {
+        fprintf(stderr, "HeadlessViewBackend::updateSnapshot shmBuffer is empty: %ux%u\n", width, height);
+        return;
+    }
+
+    auto info = SkImageInfo::MakeN32Premul(width, height, SkColorSpace::MakeSRGB());
     uint32_t bufferStride = info.minRowBytes();
-    uint8_t* buffer = new uint8_t[bufferStride * m_height];
-    memset(buffer, 0, bufferStride * m_height);
+    uint32_t stride = std::max(0, wl_shm_buffer_get_stride(shmBuffer));
+    if (bufferStride != stride) {
+        fprintf(stderr, "bufferStride != stride: %u != %u\n", bufferStride, stride);
+        return;
+    }
 
+    uint8_t* buffer = new uint8_t[bufferStride * height];
     {
-        uint32_t width = std::min<uint32_t>(m_width, std::max(0, wl_shm_buffer_get_width(shmBuffer)));
-        uint32_t height = std::min<uint32_t>(m_height, std::max(0, wl_shm_buffer_get_height(shmBuffer)));
-        uint32_t stride = std::max(0, wl_shm_buffer_get_stride(shmBuffer));
-
         wl_shm_buffer_begin_access(shmBuffer);
         auto* data = static_cast<uint8_t*>(wl_shm_buffer_get_data(shmBuffer));
 
-        for (uint32_t y = 0; y < height; ++y) {
-            for (uint32_t x = 0; x < width; ++x) {
-                buffer[bufferStride * y + 4 * x + 0] = data[stride * y + 4 * x + 0];
-                buffer[bufferStride * y + 4 * x + 1] = data[stride * y + 4 * x + 1];
-                buffer[bufferStride * y + 4 * x + 2] = data[stride * y + 4 * x + 2];
-                buffer[bufferStride * y + 4 * x + 3] = data[stride * y + 4 * x + 3];
-            }
-        }
-
+        memcpy(buffer, data, bufferStride * height);
         wl_shm_buffer_end_access(shmBuffer);
     }
 
diff --git a/WebKit.xcworkspace/contents.xcworkspacedata b/WebKit.xcworkspace/contents.xcworkspacedata
index 5d6492124eb520ce2b25f5c62775438103050ed3..1c0ea8a3258b5676b81fb00360e2c0589cc93e18 100644
--- a/WebKit.xcworkspace/contents.xcworkspacedata
+++ b/WebKit.xcworkspace/contents.xcworkspacedata
@@ -4,6 +4,9 @@
    <FileRef
       location = "group:Configurations">
    </FileRef>
+   <FileRef
+      location = "group:Tools/Playwright/Playwright.xcodeproj">
+   </FileRef>
    <FileRef
       location = "group:Source/bmalloc/bmalloc.xcodeproj">
    </FileRef>
diff --git a/WebKit.xcworkspace/xcshareddata/xcschemes/Everything up to WebKit + Tools.xcscheme b/WebKit.xcworkspace/xcshareddata/xcschemes/Everything up to WebKit + Tools.xcscheme
index 30f8a76f6050c407ab563814f614b3b848c168ff..d5fd599e4865f147d7ca8cfbcd6a4bedf6baa9e5 100644
--- a/WebKit.xcworkspace/xcshareddata/xcschemes/Everything up to WebKit + Tools.xcscheme	
+++ b/WebKit.xcworkspace/xcshareddata/xcschemes/Everything up to WebKit + Tools.xcscheme	
@@ -202,6 +202,20 @@
                ReferencedContainer = "container:Tools/SwiftBrowser/SwiftBrowser.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "8D1107260486CEB800E47091"
+               BuildableName = "Playwright.app"
+               BlueprintName = "Playwright"
+               ReferencedContainer = "container:Tools/Playwright/Playwright.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
          <BuildActionEntry
             buildForTesting = "YES"
             buildForRunning = "YES"