Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3045 insertions, 0 deletions

diff --git a/dom/console/Console.cpp b/dom/console/Console.cpp
new file mode 100644
index 0000000000..54ca865d95
--- /dev/null
+++ b/dom/console/Console.cpp
@@ -0,0 +1,3045 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/Console.h"
+#include "mozilla/dom/ConsoleInstance.h"
+#include "mozilla/dom/ConsoleBinding.h"
+#include "ConsoleCommon.h"
+
+#include "js/Array.h"               // JS::GetArrayLength, JS::NewArrayObject
+#include "js/PropertyAndElement.h"  // JS_DefineElement, JS_DefineProperty, JS_GetElement
+#include "mozilla/dom/BlobBinding.h"
+#include "mozilla/dom/BlobImpl.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/ElementBinding.h"
+#include "mozilla/dom/Exceptions.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/FunctionBinding.h"
+#include "mozilla/dom/Performance.h"
+#include "mozilla/dom/PromiseBinding.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "mozilla/dom/WorkerRunnable.h"
+#include "mozilla/dom/WorkerScope.h"
+#include "mozilla/dom/WorkletGlobalScope.h"
+#include "mozilla/dom/WorkletImpl.h"
+#include "mozilla/dom/WorkletThread.h"
+#include "mozilla/dom/RootedDictionary.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/HoldDropJSObjects.h"
+#include "mozilla/JSObjectHolder.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_devtools.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsDOMNavigationTiming.h"
+#include "nsGlobalWindow.h"
+#include "nsJSUtils.h"
+#include "nsNetUtil.h"
+#include "xpcpublic.h"
+#include "nsContentUtils.h"
+#include "nsDocShell.h"
+#include "nsProxyRelease.h"
+#include "nsReadableUtils.h"
+#include "mozilla/ConsoleTimelineMarker.h"
+#include "mozilla/TimestampTimelineMarker.h"
+
+#include "nsIConsoleAPIStorage.h"
+#include "nsIException.h"  // for nsIStackFrame
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsILoadContext.h"
+#include "nsISensitiveInfoHiddenURI.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIWebNavigation.h"
+#include "nsIXPConnect.h"
+
+// The maximum allowed number of concurrent timers per page.
+#define MAX_PAGE_TIMERS 10000
+
+// The maximum allowed number of concurrent counters per page.
+#define MAX_PAGE_COUNTERS 10000
+
+// The maximum stacktrace depth when populating the stacktrace array used for
+// console.trace().
+#define DEFAULT_MAX_STACKTRACE_DEPTH 200
+
+// This tags are used in the Structured Clone Algorithm to move js values from
+// worker thread to main thread
+#define CONSOLE_TAG_BLOB JS_SCTAG_USER_MIN
+
+// This value is taken from ConsoleAPIStorage.js
+#define STORAGE_MAX_EVENTS 1000
+
+using namespace mozilla::dom::exceptions;
+
+namespace mozilla::dom {
+
+struct ConsoleStructuredCloneData {
+  nsCOMPtr<nsIGlobalObject> mGlobal;
+  nsTArray<RefPtr<BlobImpl>> mBlobs;
+};
+
+static void ComposeAndStoreGroupName(JSContext* aCx,
+                                     const Sequence<JS::Value>& aData,
+                                     nsAString& aName,
+                                     nsTArray<nsString>* aGroupStack);
+static bool UnstoreGroupName(nsAString& aName, nsTArray<nsString>* aGroupStack);
+
+static bool ProcessArguments(JSContext* aCx, const Sequence<JS::Value>& aData,
+                             Sequence<JS::Value>& aSequence,
+                             Sequence<nsString>& aStyles);
+
+static JS::Value CreateCounterOrResetCounterValue(JSContext* aCx,
+                                                  const nsAString& aCountLabel,
+                                                  uint32_t aCountValue);
+
+/**
+ * Console API in workers uses the Structured Clone Algorithm to move any value
+ * from the worker thread to the main-thread. Some object cannot be moved and,
+ * in these cases, we convert them to strings.
+ * It's not the best, but at least we are able to show something.
+ */
+
+class ConsoleCallData final {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ConsoleCallData)
+
+  ConsoleCallData(Console::MethodName aName, const nsAString& aString,
+                  Console* aConsole)
+      : mConsoleID(aConsole->mConsoleID),
+        mPrefix(aConsole->mPrefix),
+        mMethodName(aName),
+        mMicroSecondTimeStamp(JS_Now()),
+        mStartTimerValue(0),
+        mStartTimerStatus(Console::eTimerUnknown),
+        mLogTimerDuration(0),
+        mLogTimerStatus(Console::eTimerUnknown),
+        mCountValue(MAX_PAGE_COUNTERS),
+        mIDType(eUnknown),
+        mOuterIDNumber(0),
+        mInnerIDNumber(0),
+        mMethodString(aString) {}
+
+  void SetIDs(uint64_t aOuterID, uint64_t aInnerID) {
+    MOZ_ASSERT(mIDType == eUnknown);
+
+    mOuterIDNumber = aOuterID;
+    mInnerIDNumber = aInnerID;
+    mIDType = eNumber;
+  }
+
+  void SetIDs(const nsAString& aOuterID, const nsAString& aInnerID) {
+    MOZ_ASSERT(mIDType == eUnknown);
+
+    mOuterIDString = aOuterID;
+    mInnerIDString = aInnerID;
+    mIDType = eString;
+  }
+
+  void SetOriginAttributes(const OriginAttributes& aOriginAttributes) {
+    mOriginAttributes = aOriginAttributes;
+  }
+
+  void SetAddonId(nsIPrincipal* aPrincipal) {
+    nsAutoString addonId;
+    aPrincipal->GetAddonId(addonId);
+
+    mAddonId = addonId;
+  }
+
+  void AssertIsOnOwningThread() const {
+    NS_ASSERT_OWNINGTHREAD(ConsoleCallData);
+  }
+
+  const nsString mConsoleID;
+  const nsString mPrefix;
+
+  const Console::MethodName mMethodName;
+  int64_t mMicroSecondTimeStamp;
+
+  // These values are set in the owning thread and they contain the timestamp of
+  // when the new timer has started, the name of it and the status of the
+  // creation of it. If status is false, something went wrong. User
+  // DOMHighResTimeStamp instead mozilla::TimeStamp because we use
+  // monotonicTimer from Performance.now();
+  // They will be set on the owning thread and never touched again on that
+  // thread. They will be used in order to create a ConsoleTimerStart dictionary
+  // when console.time() is used.
+  DOMHighResTimeStamp mStartTimerValue;
+  nsString mStartTimerLabel;
+  Console::TimerStatus mStartTimerStatus;
+
+  // These values are set in the owning thread and they contain the duration,
+  // the name and the status of the LogTimer method. If status is false,
+  // something went wrong. They will be set on the owning thread and never
+  // touched again on that thread. They will be used in order to create a
+  // ConsoleTimerLogOrEnd dictionary. This members are set when
+  // console.timeEnd() or console.timeLog() are called.
+  double mLogTimerDuration;
+  nsString mLogTimerLabel;
+  Console::TimerStatus mLogTimerStatus;
+
+  // These 2 values are set by IncreaseCounter or ResetCounter on the owning
+  // thread and they are used by CreateCounterOrResetCounterValue.
+  // These members are set when console.count() or console.countReset() are
+  // called.
+  nsString mCountLabel;
+  uint32_t mCountValue;
+
+  // The concept of outerID and innerID is misleading because when a
+  // ConsoleCallData is created from a window, these are the window IDs, but
+  // when the object is created from a SharedWorker, a ServiceWorker or a
+  // subworker of a ChromeWorker these IDs are the type of worker and the
+  // filename of the callee.
+  // In Console.sys.mjs the ID is 'jsm'.
+  enum { eString, eNumber, eUnknown } mIDType;
+
+  uint64_t mOuterIDNumber;
+  nsString mOuterIDString;
+
+  uint64_t mInnerIDNumber;
+  nsString mInnerIDString;
+
+  OriginAttributes mOriginAttributes;
+
+  nsString mAddonId;
+
+  const nsString mMethodString;
+
+  // Stack management is complicated, because we want to do it as
+  // lazily as possible.  Therefore, we have the following behavior:
+  // 1)  mTopStackFrame is initialized whenever we have any JS on the stack
+  // 2)  mReifiedStack is initialized if we're created in a worker.
+  // 3)  mStack is set (possibly to null if there is no JS on the stack) if
+  //     we're created on main thread.
+  Maybe<ConsoleStackEntry> mTopStackFrame;
+  Maybe<nsTArray<ConsoleStackEntry>> mReifiedStack;
+  nsCOMPtr<nsIStackFrame> mStack;
+
+ private:
+  ~ConsoleCallData() = default;
+
+  NS_DECL_OWNINGTHREAD;
+};
+
+// MainThreadConsoleData instances are created on the Console thread and
+// referenced from both main and Console threads in order to provide the same
+// object for any ConsoleRunnables relating to the same Console.  A Console
+// owns a MainThreadConsoleData; MainThreadConsoleData does not keep its
+// Console alive.
+class MainThreadConsoleData final {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MainThreadConsoleData);
+
+  JSObject* GetOrCreateSandbox(JSContext* aCx, nsIPrincipal* aPrincipal);
+  // This method must receive aCx and aArguments in the same JS::Compartment.
+  void ProcessCallData(JSContext* aCx, ConsoleCallData* aData,
+                       const Sequence<JS::Value>& aArguments);
+
+ private:
+  ~MainThreadConsoleData() {
+    NS_ReleaseOnMainThread("MainThreadConsoleData::mStorage",
+                           mStorage.forget());
+    NS_ReleaseOnMainThread("MainThreadConsoleData::mSandbox",
+                           mSandbox.forget());
+  }
+
+  // All members, except for mRefCnt, are accessed only on the main thread,
+  // except in MainThreadConsoleData destruction, at which point there are no
+  // other references.
+  nsCOMPtr<nsIConsoleAPIStorage> mStorage;
+  RefPtr<JSObjectHolder> mSandbox;
+  nsTArray<nsString> mGroupStack;
+};
+
+// This base class must be extended for Worker and for Worklet.
+class ConsoleRunnable : public StructuredCloneHolderBase {
+ public:
+  ~ConsoleRunnable() override {
+    MOZ_ASSERT(!mClonedData.mGlobal,
+               "mClonedData.mGlobal is set and cleared in a main thread scope");
+    // Clear the StructuredCloneHolderBase class.
+    Clear();
+  }
+
+ protected:
+  JSObject* CustomReadHandler(JSContext* aCx, JSStructuredCloneReader* aReader,
+                              const JS::CloneDataPolicy& aCloneDataPolicy,
+                              uint32_t aTag, uint32_t aIndex) override {
+    AssertIsOnMainThread();
+
+    if (aTag == CONSOLE_TAG_BLOB) {
+      MOZ_ASSERT(mClonedData.mBlobs.Length() > aIndex);
+
+      JS::Rooted<JS::Value> val(aCx);
+      {
+        nsCOMPtr<nsIGlobalObject> global = mClonedData.mGlobal;
+        RefPtr<Blob> blob =
+            Blob::Create(global, mClonedData.mBlobs.ElementAt(aIndex));
+        if (!ToJSValue(aCx, blob, &val)) {
+          return nullptr;
+        }
+      }
+
+      return &val.toObject();
+    }
+
+    MOZ_CRASH("No other tags are supported.");
+    return nullptr;
+  }
+
+  bool CustomWriteHandler(JSContext* aCx, JSStructuredCloneWriter* aWriter,
+                          JS::Handle<JSObject*> aObj,
+                          bool* aSameProcessScopeRequired) override {
+    RefPtr<Blob> blob;
+    if (NS_SUCCEEDED(UNWRAP_OBJECT(Blob, aObj, blob))) {
+      if (NS_WARN_IF(!JS_WriteUint32Pair(aWriter, CONSOLE_TAG_BLOB,
+                                         mClonedData.mBlobs.Length()))) {
+        return false;
+      }
+
+      mClonedData.mBlobs.AppendElement(blob->Impl());
+      return true;
+    }
+
+    if (!JS_ObjectNotWritten(aWriter, aObj)) {
+      return false;
+    }
+
+    JS::Rooted<JS::Value> value(aCx, JS::ObjectOrNullValue(aObj));
+    JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+    if (NS_WARN_IF(!jsString)) {
+      return false;
+    }
+
+    if (NS_WARN_IF(!JS_WriteString(aWriter, jsString))) {
+      return false;
+    }
+
+    return true;
+  }
+
+  // Helper method for CallData
+  void ProcessCallData(JSContext* aCx, MainThreadConsoleData* aConsoleData,
+                       ConsoleCallData* aCallData) {
+    AssertIsOnMainThread();
+
+    ConsoleCommon::ClearException ce(aCx);
+
+    JS::Rooted<JS::Value> argumentsValue(aCx);
+    if (!Read(aCx, &argumentsValue)) {
+      return;
+    }
+
+    MOZ_ASSERT(argumentsValue.isObject());
+
+    JS::Rooted<JSObject*> argumentsObj(aCx, &argumentsValue.toObject());
+
+    uint32_t length;
+    if (!JS::GetArrayLength(aCx, argumentsObj, &length)) {
+      return;
+    }
+
+    Sequence<JS::Value> values;
+    SequenceRooter<JS::Value> arguments(aCx, &values);
+
+    for (uint32_t i = 0; i < length; ++i) {
+      JS::Rooted<JS::Value> value(aCx);
+
+      if (!JS_GetElement(aCx, argumentsObj, i, &value)) {
+        return;
+      }
+
+      if (!values.AppendElement(value, fallible)) {
+        return;
+      }
+    }
+
+    MOZ_ASSERT(values.Length() == length);
+
+    aConsoleData->ProcessCallData(aCx, aCallData, values);
+  }
+
+  // Generic
+  bool WriteArguments(JSContext* aCx, const Sequence<JS::Value>& aArguments) {
+    ConsoleCommon::ClearException ce(aCx);
+
+    JS::Rooted<JSObject*> arguments(
+        aCx, JS::NewArrayObject(aCx, aArguments.Length()));
+    if (NS_WARN_IF(!arguments)) {
+      return false;
+    }
+
+    JS::Rooted<JS::Value> arg(aCx);
+    for (uint32_t i = 0; i < aArguments.Length(); ++i) {
+      arg = aArguments[i];
+      if (NS_WARN_IF(
+              !JS_DefineElement(aCx, arguments, i, arg, JSPROP_ENUMERATE))) {
+        return false;
+      }
+    }
+
+    JS::Rooted<JS::Value> value(aCx, JS::ObjectValue(*arguments));
+    return WriteData(aCx, value);
+  }
+
+  // Helper method for Profile calls
+  void ProcessProfileData(JSContext* aCx, Console::MethodName aMethodName,
+                          const nsAString& aAction) {
+    AssertIsOnMainThread();
+
+    ConsoleCommon::ClearException ce(aCx);
+
+    JS::Rooted<JS::Value> argumentsValue(aCx);
+    bool ok = Read(aCx, &argumentsValue);
+    mClonedData.mGlobal = nullptr;
+
+    if (!ok) {
+      return;
+    }
+
+    MOZ_ASSERT(argumentsValue.isObject());
+    JS::Rooted<JSObject*> argumentsObj(aCx, &argumentsValue.toObject());
+    if (NS_WARN_IF(!argumentsObj)) {
+      return;
+    }
+
+    uint32_t length;
+    if (!JS::GetArrayLength(aCx, argumentsObj, &length)) {
+      return;
+    }
+
+    Sequence<JS::Value> arguments;
+
+    for (uint32_t i = 0; i < length; ++i) {
+      JS::Rooted<JS::Value> value(aCx);
+
+      if (!JS_GetElement(aCx, argumentsObj, i, &value)) {
+        return;
+      }
+
+      if (!arguments.AppendElement(value, fallible)) {
+        return;
+      }
+    }
+
+    Console::ProfileMethodMainthread(aCx, aAction, arguments);
+  }
+
+  bool WriteData(JSContext* aCx, JS::Handle<JS::Value> aValue) {
+    // We use structuredClone to send the JSValue to the main-thread, in order
+    // to store it into the Console API Service. The consumer will be the
+    // console panel in the devtools and, because of this, we want to allow the
+    // cloning of sharedArrayBuffers and WASM modules.
+    JS::CloneDataPolicy cloneDataPolicy;
+    cloneDataPolicy.allowIntraClusterClonableSharedObjects();
+    cloneDataPolicy.allowSharedMemoryObjects();
+
+    if (NS_WARN_IF(
+            !Write(aCx, aValue, JS::UndefinedHandleValue, cloneDataPolicy))) {
+      // Ignore the message.
+      return false;
+    }
+
+    return true;
+  }
+
+  ConsoleStructuredCloneData mClonedData;
+};
+
+class ConsoleWorkletRunnable : public Runnable, public ConsoleRunnable {
+ protected:
+  explicit ConsoleWorkletRunnable(Console* aConsole)
+      : Runnable("dom::console::ConsoleWorkletRunnable"),
+        mConsoleData(aConsole->GetOrCreateMainThreadData()) {
+    WorkletThread::AssertIsOnWorkletThread();
+    nsCOMPtr<WorkletGlobalScope> global = do_QueryInterface(aConsole->mGlobal);
+    MOZ_ASSERT(global);
+    mWorkletImpl = global->Impl();
+    MOZ_ASSERT(mWorkletImpl);
+  }
+
+  ~ConsoleWorkletRunnable() override = default;
+
+ protected:
+  RefPtr<MainThreadConsoleData> mConsoleData;
+
+  RefPtr<WorkletImpl> mWorkletImpl;
+};
+
+// This runnable appends a CallData object into the Console queue running on
+// the main-thread.
+class ConsoleCallDataWorkletRunnable final : public ConsoleWorkletRunnable {
+ public:
+  static already_AddRefed<ConsoleCallDataWorkletRunnable> Create(
+      JSContext* aCx, Console* aConsole, ConsoleCallData* aConsoleData,
+      const Sequence<JS::Value>& aArguments) {
+    WorkletThread::AssertIsOnWorkletThread();
+
+    RefPtr<ConsoleCallDataWorkletRunnable> runnable =
+        new ConsoleCallDataWorkletRunnable(aConsole, aConsoleData);
+
+    if (!runnable->WriteArguments(aCx, aArguments)) {
+      return nullptr;
+    }
+
+    return runnable.forget();
+  }
+
+ private:
+  ConsoleCallDataWorkletRunnable(Console* aConsole, ConsoleCallData* aCallData)
+      : ConsoleWorkletRunnable(aConsole), mCallData(aCallData) {
+    WorkletThread::AssertIsOnWorkletThread();
+    MOZ_ASSERT(aCallData);
+    aCallData->AssertIsOnOwningThread();
+
+    const WorkletLoadInfo& loadInfo = mWorkletImpl->LoadInfo();
+    mCallData->SetIDs(loadInfo.OuterWindowID(), loadInfo.InnerWindowID());
+  }
+
+  ~ConsoleCallDataWorkletRunnable() override = default;
+
+  NS_IMETHOD Run() override {
+    AssertIsOnMainThread();
+    AutoJSAPI jsapi;
+    jsapi.Init();
+    JSContext* cx = jsapi.cx();
+
+    JSObject* sandbox =
+        mConsoleData->GetOrCreateSandbox(cx, mWorkletImpl->Principal());
+    JS::Rooted<JSObject*> global(cx, sandbox);
+    if (NS_WARN_IF(!global)) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // The CreateSandbox call returns a proxy to the actual sandbox object. We
+    // don't need a proxy here.
+    global = js::UncheckedUnwrap(global);
+
+    JSAutoRealm ar(cx, global);
+
+    // We don't need to set a parent object in mCallData bacause there are not
+    // DOM objects exposed to worklet.
+
+    ProcessCallData(cx, mConsoleData, mCallData);
+
+    return NS_OK;
+  }
+
+  RefPtr<ConsoleCallData> mCallData;
+};
+
+class ConsoleWorkerRunnable : public WorkerProxyToMainThreadRunnable,
+                              public ConsoleRunnable {
+ public:
+  explicit ConsoleWorkerRunnable(Console* aConsole)
+      : mConsoleData(aConsole->GetOrCreateMainThreadData()) {}
+
+  ~ConsoleWorkerRunnable() override = default;
+
+  bool Dispatch(JSContext* aCx, const Sequence<JS::Value>& aArguments) {
+    WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+    MOZ_ASSERT(workerPrivate);
+
+    if (NS_WARN_IF(!WriteArguments(aCx, aArguments))) {
+      RunBackOnWorkerThreadForCleanup(workerPrivate);
+      return false;
+    }
+
+    if (NS_WARN_IF(!WorkerProxyToMainThreadRunnable::Dispatch(workerPrivate))) {
+      // RunBackOnWorkerThreadForCleanup() will be called by
+      // WorkerProxyToMainThreadRunnable::Dispatch().
+      return false;
+    }
+
+    return true;
+  }
+
+ protected:
+  void RunOnMainThread(WorkerPrivate* aWorkerPrivate) override {
+    MOZ_ASSERT(aWorkerPrivate);
+    AssertIsOnMainThread();
+
+    // Walk up to our containing page
+    WorkerPrivate* wp = aWorkerPrivate;
+    while (wp->GetParent()) {
+      wp = wp->GetParent();
+    }
+
+    nsCOMPtr<nsPIDOMWindowInner> window = wp->GetWindow();
+    if (!window) {
+      RunWindowless(aWorkerPrivate);
+    } else {
+      RunWithWindow(aWorkerPrivate, window);
+    }
+  }
+
+  void RunWithWindow(WorkerPrivate* aWorkerPrivate,
+                     nsPIDOMWindowInner* aWindow) {
+    MOZ_ASSERT(aWorkerPrivate);
+    AssertIsOnMainThread();
+
+    AutoJSAPI jsapi;
+    MOZ_ASSERT(aWindow);
+
+    RefPtr<nsGlobalWindowInner> win = nsGlobalWindowInner::Cast(aWindow);
+    if (NS_WARN_IF(!jsapi.Init(win))) {
+      return;
+    }
+
+    nsCOMPtr<nsPIDOMWindowOuter> outerWindow = aWindow->GetOuterWindow();
+    if (NS_WARN_IF(!outerWindow)) {
+      return;
+    }
+
+    RunConsole(jsapi.cx(), aWindow->AsGlobal(), aWorkerPrivate, outerWindow,
+               aWindow);
+  }
+
+  void RunWindowless(WorkerPrivate* aWorkerPrivate) {
+    MOZ_ASSERT(aWorkerPrivate);
+    AssertIsOnMainThread();
+
+    WorkerPrivate* wp = aWorkerPrivate;
+    while (wp->GetParent()) {
+      wp = wp->GetParent();
+    }
+
+    MOZ_ASSERT(!wp->GetWindow());
+
+    AutoJSAPI jsapi;
+    jsapi.Init();
+
+    JSContext* cx = jsapi.cx();
+
+    JS::Rooted<JSObject*> global(
+        cx, mConsoleData->GetOrCreateSandbox(cx, wp->GetPrincipal()));
+    if (NS_WARN_IF(!global)) {
+      return;
+    }
+
+    // The GetOrCreateSandbox call returns a proxy to the actual sandbox object.
+    // We don't need a proxy here.
+    global = js::UncheckedUnwrap(global);
+
+    JSAutoRealm ar(cx, global);
+
+    nsCOMPtr<nsIGlobalObject> globalObject = xpc::NativeGlobal(global);
+    if (NS_WARN_IF(!globalObject)) {
+      return;
+    }
+
+    RunConsole(cx, globalObject, aWorkerPrivate, nullptr, nullptr);
+  }
+
+  void RunBackOnWorkerThreadForCleanup(WorkerPrivate* aWorkerPrivate) override {
+    MOZ_ASSERT(aWorkerPrivate);
+    aWorkerPrivate->AssertIsOnWorkerThread();
+  }
+
+  // This method is called in the main-thread.
+  virtual void RunConsole(JSContext* aCx, nsIGlobalObject* aGlobal,
+                          WorkerPrivate* aWorkerPrivate,
+                          nsPIDOMWindowOuter* aOuterWindow,
+                          nsPIDOMWindowInner* aInnerWindow) = 0;
+
+  bool ForMessaging() const override { return true; }
+
+  RefPtr<MainThreadConsoleData> mConsoleData;
+};
+
+// This runnable appends a CallData object into the Console queue running on
+// the main-thread.
+class ConsoleCallDataWorkerRunnable final : public ConsoleWorkerRunnable {
+ public:
+  ConsoleCallDataWorkerRunnable(Console* aConsole, ConsoleCallData* aCallData)
+      : ConsoleWorkerRunnable(aConsole), mCallData(aCallData) {
+    MOZ_ASSERT(aCallData);
+    mCallData->AssertIsOnOwningThread();
+  }
+
+ private:
+  ~ConsoleCallDataWorkerRunnable() override = default;
+
+  void RunConsole(JSContext* aCx, nsIGlobalObject* aGlobal,
+                  WorkerPrivate* aWorkerPrivate,
+                  nsPIDOMWindowOuter* aOuterWindow,
+                  nsPIDOMWindowInner* aInnerWindow) override {
+    MOZ_ASSERT(aGlobal);
+    MOZ_ASSERT(aWorkerPrivate);
+    AssertIsOnMainThread();
+
+    // The windows have to run in parallel.
+    MOZ_ASSERT(!!aOuterWindow == !!aInnerWindow);
+
+    if (aOuterWindow) {
+      mCallData->SetIDs(aOuterWindow->WindowID(), aInnerWindow->WindowID());
+    } else {
+      ConsoleStackEntry frame;
+      if (mCallData->mTopStackFrame) {
+        frame = *mCallData->mTopStackFrame;
+      }
+
+      nsString id = frame.mFilename;
+      nsString innerID;
+      if (aWorkerPrivate->IsSharedWorker()) {
+        innerID = u"SharedWorker"_ns;
+      } else if (aWorkerPrivate->IsServiceWorker()) {
+        innerID = u"ServiceWorker"_ns;
+        // Use scope as ID so the webconsole can decide if the message should
+        // show up per tab
+        CopyASCIItoUTF16(aWorkerPrivate->ServiceWorkerScope(), id);
+      } else {
+        innerID = u"Worker"_ns;
+      }
+
+      mCallData->SetIDs(id, innerID);
+    }
+
+    mClonedData.mGlobal = aGlobal;
+
+    ProcessCallData(aCx, mConsoleData, mCallData);
+
+    mClonedData.mGlobal = nullptr;
+  }
+
+  RefPtr<ConsoleCallData> mCallData;
+};
+
+// This runnable calls ProfileMethod() on the console on the main-thread.
+class ConsoleProfileWorkletRunnable final : public ConsoleWorkletRunnable {
+ public:
+  static already_AddRefed<ConsoleProfileWorkletRunnable> Create(
+      JSContext* aCx, Console* aConsole, Console::MethodName aName,
+      const nsAString& aAction, const Sequence<JS::Value>& aArguments) {
+    WorkletThread::AssertIsOnWorkletThread();
+
+    RefPtr<ConsoleProfileWorkletRunnable> runnable =
+        new ConsoleProfileWorkletRunnable(aConsole, aName, aAction);
+
+    if (!runnable->WriteArguments(aCx, aArguments)) {
+      return nullptr;
+    }
+
+    return runnable.forget();
+  }
+
+ private:
+  ConsoleProfileWorkletRunnable(Console* aConsole, Console::MethodName aName,
+                                const nsAString& aAction)
+      : ConsoleWorkletRunnable(aConsole), mName(aName), mAction(aAction) {
+    MOZ_ASSERT(aConsole);
+  }
+
+  NS_IMETHOD Run() override {
+    AssertIsOnMainThread();
+
+    AutoJSAPI jsapi;
+    jsapi.Init();
+    JSContext* cx = jsapi.cx();
+
+    JSObject* sandbox =
+        mConsoleData->GetOrCreateSandbox(cx, mWorkletImpl->Principal());
+    JS::Rooted<JSObject*> global(cx, sandbox);
+    if (NS_WARN_IF(!global)) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // The CreateSandbox call returns a proxy to the actual sandbox object. We
+    // don't need a proxy here.
+    global = js::UncheckedUnwrap(global);
+
+    JSAutoRealm ar(cx, global);
+
+    // We don't need to set a parent object in mCallData bacause there are not
+    // DOM objects exposed to worklet.
+    ProcessProfileData(cx, mName, mAction);
+
+    return NS_OK;
+  }
+
+  Console::MethodName mName;
+  nsString mAction;
+};
+
+// This runnable calls ProfileMethod() on the console on the main-thread.
+class ConsoleProfileWorkerRunnable final : public ConsoleWorkerRunnable {
+ public:
+  ConsoleProfileWorkerRunnable(Console* aConsole, Console::MethodName aName,
+                               const nsAString& aAction)
+      : ConsoleWorkerRunnable(aConsole), mName(aName), mAction(aAction) {
+    MOZ_ASSERT(aConsole);
+  }
+
+ private:
+  void RunConsole(JSContext* aCx, nsIGlobalObject* aGlobal,
+                  WorkerPrivate* aWorkerPrivate,
+                  nsPIDOMWindowOuter* aOuterWindow,
+                  nsPIDOMWindowInner* aInnerWindow) override {
+    AssertIsOnMainThread();
+    MOZ_ASSERT(aGlobal);
+
+    mClonedData.mGlobal = aGlobal;
+
+    ProcessProfileData(aCx, mName, mAction);
+
+    mClonedData.mGlobal = nullptr;
+  }
+
+  Console::MethodName mName;
+  nsString mAction;
+};
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(Console)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Console)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mConsoleEventNotifier)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mDumpFunction)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE
+  tmp->Shutdown();
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Console)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConsoleEventNotifier)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDumpFunction)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(Console)
+  for (uint32_t i = 0; i < tmp->mArgumentStorage.length(); ++i) {
+    tmp->mArgumentStorage[i].Trace(aCallbacks, aClosure);
+  }
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Console)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Console)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Console)
+  NS_INTERFACE_MAP_ENTRY(nsIObserver)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END
+
+/* static */
+already_AddRefed<Console> Console::Create(JSContext* aCx,
+                                          nsPIDOMWindowInner* aWindow,
+                                          ErrorResult& aRv) {
+  MOZ_ASSERT_IF(NS_IsMainThread(), aWindow);
+
+  uint64_t outerWindowID = 0;
+  uint64_t innerWindowID = 0;
+
+  if (aWindow) {
+    innerWindowID = aWindow->WindowID();
+
+    // Without outerwindow any console message coming from this object will not
+    // shown in the devtools webconsole. But this should be fine because
+    // probably we are shutting down, or the window is CCed/GCed.
+    nsPIDOMWindowOuter* outerWindow = aWindow->GetOuterWindow();
+    if (outerWindow) {
+      outerWindowID = outerWindow->WindowID();
+    }
+  }
+
+  RefPtr<Console> console = new Console(aCx, nsGlobalWindowInner::Cast(aWindow),
+                                        outerWindowID, innerWindowID);
+  console->Initialize(aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  return console.forget();
+}
+
+/* static */
+already_AddRefed<Console> Console::CreateForWorklet(JSContext* aCx,
+                                                    nsIGlobalObject* aGlobal,
+                                                    uint64_t aOuterWindowID,
+                                                    uint64_t aInnerWindowID,
+                                                    ErrorResult& aRv) {
+  WorkletThread::AssertIsOnWorkletThread();
+
+  RefPtr<Console> console =
+      new Console(aCx, aGlobal, aOuterWindowID, aInnerWindowID);
+  console->Initialize(aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  return console.forget();
+}
+
+Console::Console(JSContext* aCx, nsIGlobalObject* aGlobal,
+                 uint64_t aOuterWindowID, uint64_t aInnerWindowID)
+    : mGlobal(aGlobal),
+      mOuterID(aOuterWindowID),
+      mInnerID(aInnerWindowID),
+      mDumpToStdout(false),
+      mChromeInstance(false),
+      mMaxLogLevel(ConsoleLogLevel::All),
+      mStatus(eUnknown),
+      mCreationTimeStamp(TimeStamp::Now()) {
+  // Let's enable the dumping to stdout by default for chrome.
+  if (nsContentUtils::ThreadsafeIsSystemCaller(aCx)) {
+    mDumpToStdout = StaticPrefs::devtools_console_stdout_chrome();
+  } else {
+    mDumpToStdout = StaticPrefs::devtools_console_stdout_content();
+  }
+
+  mozilla::HoldJSObjects(this);
+}
+
+Console::~Console() {
+  AssertIsOnOwningThread();
+  Shutdown();
+  mozilla::DropJSObjects(this);
+}
+
+void Console::Initialize(ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mStatus == eUnknown);
+
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+    if (NS_WARN_IF(!obs)) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return;
+    }
+
+    if (mInnerID) {
+      aRv = obs->AddObserver(this, "inner-window-destroyed", true);
+      if (NS_WARN_IF(aRv.Failed())) {
+        return;
+      }
+    }
+
+    aRv = obs->AddObserver(this, "memory-pressure", true);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+  }
+
+  mStatus = eInitialized;
+}
+
+void Console::Shutdown() {
+  AssertIsOnOwningThread();
+
+  if (mStatus == eUnknown || mStatus == eShuttingDown) {
+    return;
+  }
+
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+    if (obs) {
+      obs->RemoveObserver(this, "inner-window-destroyed");
+      obs->RemoveObserver(this, "memory-pressure");
+    }
+  }
+
+  mTimerRegistry.Clear();
+  mCounterRegistry.Clear();
+
+  ClearStorage();
+  mCallDataStorage.Clear();
+
+  mStatus = eShuttingDown;
+}
+
+NS_IMETHODIMP
+Console::Observe(nsISupports* aSubject, const char* aTopic,
+                 const char16_t* aData) {
+  AssertIsOnMainThread();
+
+  if (!strcmp(aTopic, "inner-window-destroyed")) {
+    nsCOMPtr<nsISupportsPRUint64> wrapper = do_QueryInterface(aSubject);
+    NS_ENSURE_TRUE(wrapper, NS_ERROR_FAILURE);
+
+    uint64_t innerID;
+    nsresult rv = wrapper->GetData(&innerID);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (innerID == mInnerID) {
+      Shutdown();
+    }
+
+    return NS_OK;
+  }
+
+  if (!strcmp(aTopic, "memory-pressure")) {
+    ClearStorage();
+    return NS_OK;
+  }
+
+  return NS_OK;
+}
+
+void Console::ClearStorage() {
+  mCallDataStorage.Clear();
+  mArgumentStorage.clearAndFree();
+}
+
+#define METHOD(name, string)                                          \
+  /* static */ void Console::name(const GlobalObject& aGlobal,        \
+                                  const Sequence<JS::Value>& aData) { \
+    Method(aGlobal, Method##name, nsLiteralString(string), aData);    \
+  }
+
+METHOD(Log, u"log")
+METHOD(Info, u"info")
+METHOD(Warn, u"warn")
+METHOD(Error, u"error")
+METHOD(Exception, u"exception")
+METHOD(Debug, u"debug")
+METHOD(Table, u"table")
+METHOD(Trace, u"trace")
+
+// Displays an interactive listing of all the properties of an object.
+METHOD(Dir, u"dir");
+METHOD(Dirxml, u"dirxml");
+
+METHOD(Group, u"group")
+METHOD(GroupCollapsed, u"groupCollapsed")
+
+#undef METHOD
+
+/* static */
+void Console::Clear(const GlobalObject& aGlobal) {
+  const Sequence<JS::Value> data;
+  Method(aGlobal, MethodClear, u"clear"_ns, data);
+}
+
+/* static */
+void Console::GroupEnd(const GlobalObject& aGlobal) {
+  const Sequence<JS::Value> data;
+  Method(aGlobal, MethodGroupEnd, u"groupEnd"_ns, data);
+}
+
+/* static */
+void Console::Time(const GlobalObject& aGlobal, const nsAString& aLabel) {
+  StringMethod(aGlobal, aLabel, Sequence<JS::Value>(), MethodTime, u"time"_ns);
+}
+
+/* static */
+void Console::TimeEnd(const GlobalObject& aGlobal, const nsAString& aLabel) {
+  StringMethod(aGlobal, aLabel, Sequence<JS::Value>(), MethodTimeEnd,
+               u"timeEnd"_ns);
+}
+
+/* static */
+void Console::TimeLog(const GlobalObject& aGlobal, const nsAString& aLabel,
+                      const Sequence<JS::Value>& aData) {
+  StringMethod(aGlobal, aLabel, aData, MethodTimeLog, u"timeLog"_ns);
+}
+
+/* static */
+void Console::StringMethod(const GlobalObject& aGlobal, const nsAString& aLabel,
+                           const Sequence<JS::Value>& aData,
+                           MethodName aMethodName,
+                           const nsAString& aMethodString) {
+  RefPtr<Console> console = GetConsole(aGlobal);
+  if (!console) {
+    return;
+  }
+
+  console->StringMethodInternal(aGlobal.Context(), aLabel, aData, aMethodName,
+                                aMethodString);
+}
+
+void Console::StringMethodInternal(JSContext* aCx, const nsAString& aLabel,
+                                   const Sequence<JS::Value>& aData,
+                                   MethodName aMethodName,
+                                   const nsAString& aMethodString) {
+  ConsoleCommon::ClearException ce(aCx);
+
+  Sequence<JS::Value> data;
+  SequenceRooter<JS::Value> rooter(aCx, &data);
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!dom::ToJSValue(aCx, aLabel, &value)) {
+    return;
+  }
+
+  if (!data.AppendElement(value, fallible)) {
+    return;
+  }
+
+  for (uint32_t i = 0; i < aData.Length(); ++i) {
+    if (!data.AppendElement(aData[i], fallible)) {
+      return;
+    }
+  }
+
+  MethodInternal(aCx, aMethodName, aMethodString, data);
+}
+
+/* static */
+void Console::TimeStamp(const GlobalObject& aGlobal,
+                        const JS::Handle<JS::Value> aData) {
+  JSContext* cx = aGlobal.Context();
+
+  ConsoleCommon::ClearException ce(cx);
+
+  Sequence<JS::Value> data;
+  SequenceRooter<JS::Value> rooter(cx, &data);
+
+  if (aData.isString() && !data.AppendElement(aData, fallible)) {
+    return;
+  }
+
+  Method(aGlobal, MethodTimeStamp, u"timeStamp"_ns, data);
+}
+
+/* static */
+void Console::Profile(const GlobalObject& aGlobal,
+                      const Sequence<JS::Value>& aData) {
+  ProfileMethod(aGlobal, MethodProfile, u"profile"_ns, aData);
+}
+
+/* static */
+void Console::ProfileEnd(const GlobalObject& aGlobal,
+                         const Sequence<JS::Value>& aData) {
+  ProfileMethod(aGlobal, MethodProfileEnd, u"profileEnd"_ns, aData);
+}
+
+/* static */
+void Console::ProfileMethod(const GlobalObject& aGlobal, MethodName aName,
+                            const nsAString& aAction,
+                            const Sequence<JS::Value>& aData) {
+  RefPtr<Console> console = GetConsole(aGlobal);
+  if (!console) {
+    return;
+  }
+
+  JSContext* cx = aGlobal.Context();
+  console->ProfileMethodInternal(cx, aName, aAction, aData);
+}
+
+void Console::ProfileMethodInternal(JSContext* aCx, MethodName aMethodName,
+                                    const nsAString& aAction,
+                                    const Sequence<JS::Value>& aData) {
+  if (!ShouldProceed(aMethodName)) {
+    return;
+  }
+
+  MaybeExecuteDumpFunction(aCx, aAction, aData, nullptr);
+
+  if (WorkletThread::IsOnWorkletThread()) {
+    RefPtr<ConsoleProfileWorkletRunnable> runnable =
+        ConsoleProfileWorkletRunnable::Create(aCx, this, aMethodName, aAction,
+                                              aData);
+    if (!runnable) {
+      return;
+    }
+
+    NS_DispatchToMainThread(runnable.forget());
+    return;
+  }
+
+  if (!NS_IsMainThread()) {
+    // Here we are in a worker thread.
+    RefPtr<ConsoleProfileWorkerRunnable> runnable =
+        new ConsoleProfileWorkerRunnable(this, aMethodName, aAction);
+
+    runnable->Dispatch(aCx, aData);
+    return;
+  }
+
+  ProfileMethodMainthread(aCx, aAction, aData);
+}
+
+// static
+void Console::ProfileMethodMainthread(JSContext* aCx, const nsAString& aAction,
+                                      const Sequence<JS::Value>& aData) {
+  MOZ_ASSERT(NS_IsMainThread());
+  ConsoleCommon::ClearException ce(aCx);
+
+  RootedDictionary<ConsoleProfileEvent> event(aCx);
+  event.mAction = aAction;
+  event.mChromeContext = nsContentUtils::ThreadsafeIsSystemCaller(aCx);
+
+  event.mArguments.Construct();
+  Sequence<JS::Value>& sequence = event.mArguments.Value();
+
+  for (uint32_t i = 0; i < aData.Length(); ++i) {
+    if (!sequence.AppendElement(aData[i], fallible)) {
+      return;
+    }
+  }
+
+  JS::Rooted<JS::Value> eventValue(aCx);
+  if (!ToJSValue(aCx, event, &eventValue)) {
+    return;
+  }
+
+  JS::Rooted<JSObject*> eventObj(aCx, &eventValue.toObject());
+  MOZ_ASSERT(eventObj);
+
+  if (!JS_DefineProperty(aCx, eventObj, "wrappedJSObject", eventValue,
+                         JSPROP_ENUMERATE)) {
+    return;
+  }
+
+  nsIXPConnect* xpc = nsContentUtils::XPConnect();
+  nsCOMPtr<nsISupports> wrapper;
+  const nsIID& iid = NS_GET_IID(nsISupports);
+
+  if (NS_FAILED(xpc->WrapJS(aCx, eventObj, iid, getter_AddRefs(wrapper)))) {
+    return;
+  }
+
+  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+  if (obs) {
+    obs->NotifyObservers(wrapper, "console-api-profiler", nullptr);
+  }
+}
+
+/* static */
+void Console::Assert(const GlobalObject& aGlobal, bool aCondition,
+                     const Sequence<JS::Value>& aData) {
+  if (!aCondition) {
+    Method(aGlobal, MethodAssert, u"assert"_ns, aData);
+  }
+}
+
+/* static */
+void Console::Count(const GlobalObject& aGlobal, const nsAString& aLabel) {
+  StringMethod(aGlobal, aLabel, Sequence<JS::Value>(), MethodCount,
+               u"count"_ns);
+}
+
+/* static */
+void Console::CountReset(const GlobalObject& aGlobal, const nsAString& aLabel) {
+  StringMethod(aGlobal, aLabel, Sequence<JS::Value>(), MethodCountReset,
+               u"countReset"_ns);
+}
+
+namespace {
+
+void StackFrameToStackEntry(JSContext* aCx, nsIStackFrame* aStackFrame,
+                            ConsoleStackEntry& aStackEntry) {
+  MOZ_ASSERT(aStackFrame);
+
+  aStackFrame->GetFilename(aCx, aStackEntry.mFilename);
+
+  aStackEntry.mSourceId = aStackFrame->GetSourceId(aCx);
+  aStackEntry.mLineNumber = aStackFrame->GetLineNumber(aCx);
+  aStackEntry.mColumnNumber = aStackFrame->GetColumnNumber(aCx);
+
+  aStackFrame->GetName(aCx, aStackEntry.mFunctionName);
+
+  nsString cause;
+  aStackFrame->GetAsyncCause(aCx, cause);
+  if (!cause.IsEmpty()) {
+    aStackEntry.mAsyncCause.Construct(cause);
+  }
+}
+
+void ReifyStack(JSContext* aCx, nsIStackFrame* aStack,
+                nsTArray<ConsoleStackEntry>& aRefiedStack) {
+  nsCOMPtr<nsIStackFrame> stack(aStack);
+
+  while (stack) {
+    ConsoleStackEntry& data = *aRefiedStack.AppendElement();
+    StackFrameToStackEntry(aCx, stack, data);
+
+    nsCOMPtr<nsIStackFrame> caller = stack->GetCaller(aCx);
+
+    if (!caller) {
+      caller = stack->GetAsyncCaller(aCx);
+    }
+    stack.swap(caller);
+  }
+}
+
+}  // anonymous namespace
+
+// Queue a call to a console method. See the CALL_DELAY constant.
+/* static */
+void Console::Method(const GlobalObject& aGlobal, MethodName aMethodName,
+                     const nsAString& aMethodString,
+                     const Sequence<JS::Value>& aData) {
+  RefPtr<Console> console = GetConsole(aGlobal);
+  if (!console) {
+    return;
+  }
+
+  console->MethodInternal(aGlobal.Context(), aMethodName, aMethodString, aData);
+}
+
+void Console::MethodInternal(JSContext* aCx, MethodName aMethodName,
+                             const nsAString& aMethodString,
+                             const Sequence<JS::Value>& aData) {
+  if (!ShouldProceed(aMethodName)) {
+    return;
+  }
+
+  AssertIsOnOwningThread();
+
+  ConsoleCommon::ClearException ce(aCx);
+
+  RefPtr<ConsoleCallData> callData =
+      new ConsoleCallData(aMethodName, aMethodString, this);
+  if (!StoreCallData(aCx, callData, aData)) {
+    return;
+  }
+
+  OriginAttributes oa;
+
+  if (NS_IsMainThread()) {
+    if (mGlobal) {
+      // Save the principal's OriginAttributes in the console event data
+      // so that we will be able to filter messages by origin attributes.
+      nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(mGlobal);
+      if (NS_WARN_IF(!sop)) {
+        return;
+      }
+
+      nsCOMPtr<nsIPrincipal> principal = sop->GetPrincipal();
+      if (NS_WARN_IF(!principal)) {
+        return;
+      }
+
+      oa = principal->OriginAttributesRef();
+      callData->SetAddonId(principal);
+
+#ifdef DEBUG
+      if (!principal->IsSystemPrincipal()) {
+        nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(mGlobal);
+        if (webNav) {
+          nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(webNav);
+          MOZ_ASSERT(loadContext);
+
+          bool pb;
+          if (NS_SUCCEEDED(loadContext->GetUsePrivateBrowsing(&pb))) {
+            MOZ_ASSERT(pb == !!oa.mPrivateBrowsingId);
+          }
+        }
+      }
+#endif
+    }
+  } else if (WorkletThread::IsOnWorkletThread()) {
+    nsCOMPtr<WorkletGlobalScope> global = do_QueryInterface(mGlobal);
+    MOZ_ASSERT(global);
+    oa = global->Impl()->OriginAttributesRef();
+  } else {
+    WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+    MOZ_ASSERT(workerPrivate);
+    oa = workerPrivate->GetOriginAttributes();
+  }
+
+  callData->SetOriginAttributes(oa);
+
+  JS::StackCapture captureMode =
+      ShouldIncludeStackTrace(aMethodName)
+          ? JS::StackCapture(JS::MaxFrames(DEFAULT_MAX_STACKTRACE_DEPTH))
+          : JS::StackCapture(JS::FirstSubsumedFrame(aCx));
+  nsCOMPtr<nsIStackFrame> stack = CreateStack(aCx, std::move(captureMode));
+
+  if (stack) {
+    callData->mTopStackFrame.emplace();
+    StackFrameToStackEntry(aCx, stack, *callData->mTopStackFrame);
+  }
+
+  if (NS_IsMainThread()) {
+    callData->mStack = stack;
+  } else {
+    // nsIStackFrame is not threadsafe, so we need to snapshot it now,
+    // before we post our runnable to the main thread.
+    callData->mReifiedStack.emplace();
+    ReifyStack(aCx, stack, *callData->mReifiedStack);
+  }
+
+  DOMHighResTimeStamp monotonicTimer;
+
+  // Monotonic timer for 'time', 'timeLog' and 'timeEnd'
+  if ((aMethodName == MethodTime || aMethodName == MethodTimeLog ||
+       aMethodName == MethodTimeEnd || aMethodName == MethodTimeStamp) &&
+      !MonotonicTimer(aCx, aMethodName, aData, &monotonicTimer)) {
+    return;
+  }
+
+  if (aMethodName == MethodTime && !aData.IsEmpty()) {
+    callData->mStartTimerStatus =
+        StartTimer(aCx, aData[0], monotonicTimer, callData->mStartTimerLabel,
+                   &callData->mStartTimerValue);
+  }
+
+  else if (aMethodName == MethodTimeEnd && !aData.IsEmpty()) {
+    callData->mLogTimerStatus =
+        LogTimer(aCx, aData[0], monotonicTimer, callData->mLogTimerLabel,
+                 &callData->mLogTimerDuration, true /* Cancel timer */);
+  }
+
+  else if (aMethodName == MethodTimeLog && !aData.IsEmpty()) {
+    callData->mLogTimerStatus =
+        LogTimer(aCx, aData[0], monotonicTimer, callData->mLogTimerLabel,
+                 &callData->mLogTimerDuration, false /* Cancel timer */);
+  }
+
+  else if (aMethodName == MethodCount) {
+    callData->mCountValue = IncreaseCounter(aCx, aData, callData->mCountLabel);
+    if (!callData->mCountValue) {
+      return;
+    }
+  }
+
+  else if (aMethodName == MethodCountReset) {
+    callData->mCountValue = ResetCounter(aCx, aData, callData->mCountLabel);
+    if (callData->mCountLabel.IsEmpty()) {
+      return;
+    }
+  }
+
+  // Before processing this CallData differently, it's time to call the dump
+  // function.
+  if (aMethodName == MethodTrace || aMethodName == MethodAssert) {
+    MaybeExecuteDumpFunction(aCx, aMethodString, aData, stack);
+  } else if ((aMethodName == MethodTime || aMethodName == MethodTimeEnd) &&
+             !aData.IsEmpty()) {
+    MaybeExecuteDumpFunctionForTime(aCx, aMethodName, aMethodString,
+                                    monotonicTimer, aData[0]);
+  } else {
+    MaybeExecuteDumpFunction(aCx, aMethodString, aData, nullptr);
+  }
+
+  if (NS_IsMainThread()) {
+    if (mInnerID) {
+      callData->SetIDs(mOuterID, mInnerID);
+    } else if (!mPassedInnerID.IsEmpty()) {
+      callData->SetIDs(u"jsm"_ns, mPassedInnerID);
+    } else {
+      nsAutoString filename;
+      if (callData->mTopStackFrame.isSome()) {
+        filename = callData->mTopStackFrame->mFilename;
+      }
+
+      callData->SetIDs(u"jsm"_ns, filename);
+    }
+
+    GetOrCreateMainThreadData()->ProcessCallData(aCx, callData, aData);
+
+    // Just because we don't want to expose
+    // retrieveConsoleEvents/setConsoleEventHandler to main-thread, we can
+    // cleanup the mCallDataStorage:
+    UnstoreCallData(callData);
+    return;
+  }
+
+  if (WorkletThread::IsOnWorkletThread()) {
+    RefPtr<ConsoleCallDataWorkletRunnable> runnable =
+        ConsoleCallDataWorkletRunnable::Create(aCx, this, callData, aData);
+    if (!runnable) {
+      return;
+    }
+
+    NS_DispatchToMainThread(runnable);
+    return;
+  }
+
+  // We do this only in workers for now.
+  NotifyHandler(aCx, aData, callData);
+
+  if (StaticPrefs::dom_worker_console_dispatch_events_to_main_thread()) {
+    RefPtr<ConsoleCallDataWorkerRunnable> runnable =
+        new ConsoleCallDataWorkerRunnable(this, callData);
+    Unused << NS_WARN_IF(!runnable->Dispatch(aCx, aData));
+  }
+}
+
+MainThreadConsoleData* Console::GetOrCreateMainThreadData() {
+  AssertIsOnOwningThread();
+
+  if (!mMainThreadData) {
+    mMainThreadData = new MainThreadConsoleData();
+  }
+
+  return mMainThreadData;
+}
+
+// We store information to lazily compute the stack in the reserved slots of
+// LazyStackGetter.  The first slot always stores a JS object: it's either the
+// JS wrapper of the nsIStackFrame or the actual reified stack representation.
+// The second slot is a PrivateValue() holding an nsIStackFrame* when we haven't
+// reified the stack yet, or an UndefinedValue() otherwise.
+enum { SLOT_STACKOBJ, SLOT_RAW_STACK };
+
+bool LazyStackGetter(JSContext* aCx, unsigned aArgc, JS::Value* aVp) {
+  JS::CallArgs args = CallArgsFromVp(aArgc, aVp);
+  JS::Rooted<JSObject*> callee(aCx, &args.callee());
+
+  JS::Value v = js::GetFunctionNativeReserved(&args.callee(), SLOT_RAW_STACK);
+  if (v.isUndefined()) {
+    // Already reified.
+    args.rval().set(js::GetFunctionNativeReserved(callee, SLOT_STACKOBJ));
+    return true;
+  }
+
+  nsIStackFrame* stack = reinterpret_cast<nsIStackFrame*>(v.toPrivate());
+  nsTArray<ConsoleStackEntry> reifiedStack;
+  ReifyStack(aCx, stack, reifiedStack);
+
+  JS::Rooted<JS::Value> stackVal(aCx);
+  if (NS_WARN_IF(!ToJSValue(aCx, reifiedStack, &stackVal))) {
+    return false;
+  }
+
+  MOZ_ASSERT(stackVal.isObject());
+
+  js::SetFunctionNativeReserved(callee, SLOT_STACKOBJ, stackVal);
+  js::SetFunctionNativeReserved(callee, SLOT_RAW_STACK, JS::UndefinedValue());
+
+  args.rval().set(stackVal);
+  return true;
+}
+
+void MainThreadConsoleData::ProcessCallData(
+    JSContext* aCx, ConsoleCallData* aData,
+    const Sequence<JS::Value>& aArguments) {
+  AssertIsOnMainThread();
+  MOZ_ASSERT(aData);
+
+  JS::Rooted<JS::Value> eventValue(aCx);
+
+  // We want to create a console event object and pass it to our
+  // nsIConsoleAPIStorage implementation.  We want to define some accessor
+  // properties on this object, and those will need to keep an nsIStackFrame
+  // alive.  But nsIStackFrame cannot be wrapped in an untrusted scope.  And
+  // further, passing untrusted objects to system code is likely to run afoul of
+  // Object Xrays.  So we want to wrap in a system-principal scope here.  But
+  // which one?  We could cheat and try to get the underlying JSObject* of
+  // mStorage, but that's a bit fragile.  Instead, we just use the junk scope,
+  // with explicit permission from the XPConnect module owner.  If you're
+  // tempted to do that anywhere else, talk to said module owner first.
+
+  // aCx and aArguments are in the same compartment.
+  JS::Rooted<JSObject*> targetScope(aCx, xpc::PrivilegedJunkScope());
+  if (NS_WARN_IF(!Console::PopulateConsoleNotificationInTheTargetScope(
+          aCx, aArguments, targetScope, &eventValue, aData, &mGroupStack))) {
+    return;
+  }
+
+  if (!mStorage) {
+    mStorage = do_GetService("@mozilla.org/consoleAPI-storage;1");
+  }
+
+  if (!mStorage) {
+    NS_WARNING("Failed to get the ConsoleAPIStorage service.");
+    return;
+  }
+
+  nsAutoString innerID;
+
+  MOZ_ASSERT(aData->mIDType != ConsoleCallData::eUnknown);
+  if (aData->mIDType == ConsoleCallData::eString) {
+    innerID = aData->mInnerIDString;
+  } else {
+    MOZ_ASSERT(aData->mIDType == ConsoleCallData::eNumber);
+    innerID.AppendInt(aData->mInnerIDNumber);
+  }
+
+  if (aData->mMethodName == Console::MethodClear) {
+    DebugOnly<nsresult> rv = mStorage->ClearEvents(innerID);
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "ClearEvents failed");
+  }
+
+  if (NS_FAILED(mStorage->RecordEvent(innerID, eventValue))) {
+    NS_WARNING("Failed to record a console event.");
+  }
+}
+
+/* static */
+bool Console::PopulateConsoleNotificationInTheTargetScope(
+    JSContext* aCx, const Sequence<JS::Value>& aArguments,
+    JS::Handle<JSObject*> aTargetScope,
+    JS::MutableHandle<JS::Value> aEventValue, ConsoleCallData* aData,
+    nsTArray<nsString>* aGroupStack) {
+  MOZ_ASSERT(aCx);
+  MOZ_ASSERT(aData);
+  MOZ_ASSERT(aTargetScope);
+  MOZ_ASSERT(JS_IsGlobalObject(aTargetScope));
+
+  ConsoleStackEntry frame;
+  if (aData->mTopStackFrame) {
+    frame = *aData->mTopStackFrame;
+  }
+
+  ConsoleCommon::ClearException ce(aCx);
+  RootedDictionary<ConsoleEvent> event(aCx);
+
+  event.mAddonId = aData->mAddonId;
+
+  event.mID.Construct();
+  event.mInnerID.Construct();
+
+  event.mChromeContext = nsContentUtils::ThreadsafeIsSystemCaller(aCx);
+
+  if (aData->mIDType == ConsoleCallData::eString) {
+    event.mID.Value().SetAsString() = aData->mOuterIDString;
+    event.mInnerID.Value().SetAsString() = aData->mInnerIDString;
+  } else if (aData->mIDType == ConsoleCallData::eNumber) {
+    event.mID.Value().SetAsUnsignedLongLong() = aData->mOuterIDNumber;
+    event.mInnerID.Value().SetAsUnsignedLongLong() = aData->mInnerIDNumber;
+  } else {
+    // aData->mIDType can be eUnknown when we dispatch notifications via
+    // mConsoleEventNotifier.
+    event.mID.Value().SetAsUnsignedLongLong() = 0;
+    event.mInnerID.Value().SetAsUnsignedLongLong() = 0;
+  }
+
+  event.mConsoleID = aData->mConsoleID;
+  event.mLevel = aData->mMethodString;
+  event.mFilename = frame.mFilename;
+  event.mPrefix = aData->mPrefix;
+
+  nsCOMPtr<nsIURI> filenameURI;
+  nsAutoCString pass;
+  if (NS_IsMainThread() &&
+      NS_SUCCEEDED(NS_NewURI(getter_AddRefs(filenameURI), frame.mFilename)) &&
+      NS_SUCCEEDED(filenameURI->GetPassword(pass)) && !pass.IsEmpty()) {
+    nsCOMPtr<nsISensitiveInfoHiddenURI> safeURI =
+        do_QueryInterface(filenameURI);
+    nsAutoCString spec;
+    if (safeURI && NS_SUCCEEDED(safeURI->GetSensitiveInfoHiddenSpec(spec))) {
+      CopyUTF8toUTF16(spec, event.mFilename);
+    }
+  }
+
+  event.mSourceId = frame.mSourceId;
+  event.mLineNumber = frame.mLineNumber;
+  event.mColumnNumber = frame.mColumnNumber;
+  event.mFunctionName = frame.mFunctionName;
+  event.mTimeStamp = aData->mMicroSecondTimeStamp / PR_USEC_PER_MSEC;
+  event.mMicroSecondTimeStamp = aData->mMicroSecondTimeStamp;
+  event.mPrivate = !!aData->mOriginAttributes.mPrivateBrowsingId;
+
+  switch (aData->mMethodName) {
+    case MethodLog:
+    case MethodInfo:
+    case MethodWarn:
+    case MethodError:
+    case MethodException:
+    case MethodDebug:
+    case MethodAssert:
+    case MethodGroup:
+    case MethodGroupCollapsed:
+    case MethodTrace:
+      event.mArguments.Construct();
+      event.mStyles.Construct();
+      if (NS_WARN_IF(!ProcessArguments(aCx, aArguments,
+                                       event.mArguments.Value(),
+                                       event.mStyles.Value()))) {
+        return false;
+      }
+
+      break;
+
+    default:
+      event.mArguments.Construct();
+      if (NS_WARN_IF(
+              !event.mArguments.Value().AppendElements(aArguments, fallible))) {
+        return false;
+      }
+  }
+
+  if (aData->mMethodName == MethodGroup ||
+      aData->mMethodName == MethodGroupCollapsed) {
+    ComposeAndStoreGroupName(aCx, event.mArguments.Value(), event.mGroupName,
+                             aGroupStack);
+  }
+
+  else if (aData->mMethodName == MethodGroupEnd) {
+    if (!UnstoreGroupName(event.mGroupName, aGroupStack)) {
+      return false;
+    }
+  }
+
+  else if (aData->mMethodName == MethodTime && !aArguments.IsEmpty()) {
+    event.mTimer = CreateStartTimerValue(aCx, aData->mStartTimerLabel,
+                                         aData->mStartTimerStatus);
+  }
+
+  else if ((aData->mMethodName == MethodTimeEnd ||
+            aData->mMethodName == MethodTimeLog) &&
+           !aArguments.IsEmpty()) {
+    event.mTimer = CreateLogOrEndTimerValue(aCx, aData->mLogTimerLabel,
+                                            aData->mLogTimerDuration,
+                                            aData->mLogTimerStatus);
+  }
+
+  else if (aData->mMethodName == MethodCount ||
+           aData->mMethodName == MethodCountReset) {
+    event.mCounter = CreateCounterOrResetCounterValue(aCx, aData->mCountLabel,
+                                                      aData->mCountValue);
+  }
+
+  JSAutoRealm ar2(aCx, aTargetScope);
+
+  if (NS_WARN_IF(!ToJSValue(aCx, event, aEventValue))) {
+    return false;
+  }
+
+  JS::Rooted<JSObject*> eventObj(aCx, &aEventValue.toObject());
+  if (NS_WARN_IF(!JS_DefineProperty(aCx, eventObj, "wrappedJSObject", eventObj,
+                                    JSPROP_ENUMERATE))) {
+    return false;
+  }
+
+  if (ShouldIncludeStackTrace(aData->mMethodName)) {
+    // Now define the "stacktrace" property on eventObj.  There are two cases
+    // here.  Either we came from a worker and have a reified stack, or we want
+    // to define a getter that will lazily reify the stack.
+    if (aData->mReifiedStack) {
+      JS::Rooted<JS::Value> stacktrace(aCx);
+      if (NS_WARN_IF(!ToJSValue(aCx, *aData->mReifiedStack, &stacktrace)) ||
+          NS_WARN_IF(!JS_DefineProperty(aCx, eventObj, "stacktrace", stacktrace,
+                                        JSPROP_ENUMERATE))) {
+        return false;
+      }
+    } else {
+      JSFunction* fun =
+          js::NewFunctionWithReserved(aCx, LazyStackGetter, 0, 0, "stacktrace");
+      if (NS_WARN_IF(!fun)) {
+        return false;
+      }
+
+      JS::Rooted<JSObject*> funObj(aCx, JS_GetFunctionObject(fun));
+
+      // We want to store our stack in the function and have it stay alive.  But
+      // we also need sane access to the C++ nsIStackFrame.  So store both a JS
+      // wrapper and the raw pointer: the former will keep the latter alive.
+      JS::Rooted<JS::Value> stackVal(aCx);
+      nsresult rv = nsContentUtils::WrapNative(aCx, aData->mStack, &stackVal);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return false;
+      }
+
+      js::SetFunctionNativeReserved(funObj, SLOT_STACKOBJ, stackVal);
+      js::SetFunctionNativeReserved(funObj, SLOT_RAW_STACK,
+                                    JS::PrivateValue(aData->mStack.get()));
+
+      if (NS_WARN_IF(!JS_DefineProperty(aCx, eventObj, "stacktrace", funObj,
+                                        nullptr, JSPROP_ENUMERATE))) {
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+namespace {
+
+// Helper method for ProcessArguments. Flushes output, if non-empty, to
+// aSequence.
+bool FlushOutput(JSContext* aCx, Sequence<JS::Value>& aSequence,
+                 nsString& aOutput) {
+  if (!aOutput.IsEmpty()) {
+    JS::Rooted<JSString*> str(
+        aCx, JS_NewUCStringCopyN(aCx, aOutput.get(), aOutput.Length()));
+    if (NS_WARN_IF(!str)) {
+      return false;
+    }
+
+    if (NS_WARN_IF(!aSequence.AppendElement(JS::StringValue(str), fallible))) {
+      return false;
+    }
+
+    aOutput.Truncate();
+  }
+
+  return true;
+}
+
+}  // namespace
+
+static void MakeFormatString(nsCString& aFormat, int32_t aInteger,
+                             int32_t aMantissa, char aCh) {
+  aFormat.Append('%');
+  if (aInteger >= 0) {
+    aFormat.AppendInt(aInteger);
+  }
+
+  if (aMantissa >= 0) {
+    aFormat.Append('.');
+    aFormat.AppendInt(aMantissa);
+  }
+
+  aFormat.Append(aCh);
+}
+
+// If the first JS::Value of the array is a string, this method uses it to
+// format a string. The supported sequences are:
+//   %s    - string
+//   %d,%i - integer
+//   %f    - double
+//   %o,%O - a JS object.
+//   %c    - style string.
+// The output is an array where any object is a separated item, the rest is
+// unified in a format string.
+// Example if the input is:
+//   "string: %s, integer: %d, object: %o, double: %d", 's', 1, window, 0.9
+// The output will be:
+//   [ "string: s, integer: 1, object: ", window, ", double: 0.9" ]
+//
+// The aStyles array is populated with the style strings that the function
+// finds based the format string. The index of the styles matches the indexes
+// of elements that need the custom styling from aSequence. For elements with
+// no custom styling the array is padded with null elements.
+static bool ProcessArguments(JSContext* aCx, const Sequence<JS::Value>& aData,
+                             Sequence<JS::Value>& aSequence,
+                             Sequence<nsString>& aStyles) {
+  // This method processes the arguments as format strings (%d, %i, %s...)
+  // only if the first element of them is a valid and not-empty string.
+
+  if (aData.IsEmpty()) {
+    return true;
+  }
+
+  if (aData.Length() == 1 || !aData[0].isString()) {
+    return aSequence.AppendElements(aData, fallible);
+  }
+
+  JS::Rooted<JS::Value> format(aCx, aData[0]);
+  JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, format));
+  if (NS_WARN_IF(!jsString)) {
+    return false;
+  }
+
+  nsAutoJSString string;
+  if (NS_WARN_IF(!string.init(aCx, jsString))) {
+    return false;
+  }
+
+  if (string.IsEmpty()) {
+    return aSequence.AppendElements(aData, fallible);
+  }
+
+  nsString::const_iterator start, end;
+  string.BeginReading(start);
+  string.EndReading(end);
+
+  nsString output;
+  uint32_t index = 1;
+
+  while (start != end) {
+    if (*start != '%') {
+      output.Append(*start);
+      ++start;
+      continue;
+    }
+
+    ++start;
+    if (start == end) {
+      output.Append('%');
+      break;
+    }
+
+    if (*start == '%') {
+      output.Append(*start);
+      ++start;
+      continue;
+    }
+
+    nsAutoString tmp;
+    tmp.Append('%');
+
+    int32_t integer = -1;
+    int32_t mantissa = -1;
+
+    // Let's parse %<number>.<number> for %d and %f
+    if (*start >= '0' && *start <= '9') {
+      integer = 0;
+
+      do {
+        integer = integer * 10 + *start - '0';
+        tmp.Append(*start);
+        ++start;
+      } while (*start >= '0' && *start <= '9' && start != end);
+    }
+
+    if (start == end) {
+      output.Append(tmp);
+      break;
+    }
+
+    if (*start == '.') {
+      tmp.Append(*start);
+      ++start;
+
+      if (start == end) {
+        output.Append(tmp);
+        break;
+      }
+
+      // '.' must be followed by a number.
+      if (*start < '0' || *start > '9') {
+        output.Append(tmp);
+        continue;
+      }
+
+      mantissa = 0;
+
+      do {
+        mantissa = mantissa * 10 + *start - '0';
+        tmp.Append(*start);
+        ++start;
+      } while (*start >= '0' && *start <= '9' && start != end);
+
+      if (start == end) {
+        output.Append(tmp);
+        break;
+      }
+    }
+
+    char ch = *start;
+    tmp.Append(ch);
+    ++start;
+
+    switch (ch) {
+      case 'o':
+      case 'O': {
+        if (NS_WARN_IF(!FlushOutput(aCx, aSequence, output))) {
+          return false;
+        }
+
+        JS::Rooted<JS::Value> v(aCx);
+        if (index < aData.Length()) {
+          v = aData[index++];
+        }
+
+        if (NS_WARN_IF(!aSequence.AppendElement(v, fallible))) {
+          return false;
+        }
+
+        break;
+      }
+
+      case 'c': {
+        // If there isn't any output but there's already a style, then
+        // discard the previous style and use the next one instead.
+        if (output.IsEmpty() && !aStyles.IsEmpty()) {
+          aStyles.RemoveLastElement();
+        }
+
+        if (NS_WARN_IF(!FlushOutput(aCx, aSequence, output))) {
+          return false;
+        }
+
+        if (index < aData.Length()) {
+          JS::Rooted<JS::Value> v(aCx, aData[index++]);
+          JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, v));
+          if (NS_WARN_IF(!jsString)) {
+            return false;
+          }
+
+          int32_t diff = aSequence.Length() - aStyles.Length();
+          if (diff > 0) {
+            for (int32_t i = 0; i < diff; i++) {
+              if (NS_WARN_IF(!aStyles.AppendElement(VoidString(), fallible))) {
+                return false;
+              }
+            }
+          }
+
+          nsAutoJSString string;
+          if (NS_WARN_IF(!string.init(aCx, jsString))) {
+            return false;
+          }
+
+          if (NS_WARN_IF(!aStyles.AppendElement(string, fallible))) {
+            return false;
+          }
+        }
+        break;
+      }
+
+      case 's':
+        if (index < aData.Length()) {
+          JS::Rooted<JS::Value> value(aCx, aData[index++]);
+          JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+          if (NS_WARN_IF(!jsString)) {
+            return false;
+          }
+
+          nsAutoJSString v;
+          if (NS_WARN_IF(!v.init(aCx, jsString))) {
+            return false;
+          }
+
+          output.Append(v);
+        }
+        break;
+
+      case 'd':
+      case 'i':
+        if (index < aData.Length()) {
+          JS::Rooted<JS::Value> value(aCx, aData[index++]);
+
+          if (value.isBigInt()) {
+            JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+            if (NS_WARN_IF(!jsString)) {
+              return false;
+            }
+
+            nsAutoJSString v;
+            if (NS_WARN_IF(!v.init(aCx, jsString))) {
+              return false;
+            }
+            output.Append(v);
+            break;
+          }
+
+          int32_t v;
+          if (NS_WARN_IF(!JS::ToInt32(aCx, value, &v))) {
+            return false;
+          }
+
+          nsCString format;
+          MakeFormatString(format, integer, mantissa, 'd');
+          output.AppendPrintf(format.get(), v);
+        }
+        break;
+
+      case 'f':
+        if (index < aData.Length()) {
+          JS::Rooted<JS::Value> value(aCx, aData[index++]);
+
+          double v;
+          if (NS_WARN_IF(!JS::ToNumber(aCx, value, &v))) {
+            return false;
+          }
+
+          // nspr returns "nan", but we want to expose it as "NaN"
+          if (std::isnan(v)) {
+            output.AppendFloat(v);
+          } else {
+            nsCString format;
+            MakeFormatString(format, integer, mantissa, 'f');
+            output.AppendPrintf(format.get(), v);
+          }
+        }
+        break;
+
+      default:
+        output.Append(tmp);
+        break;
+    }
+  }
+
+  if (NS_WARN_IF(!FlushOutput(aCx, aSequence, output))) {
+    return false;
+  }
+
+  // Discard trailing style element if there is no output to apply it to.
+  if (aStyles.Length() > aSequence.Length()) {
+    aStyles.TruncateLength(aSequence.Length());
+  }
+
+  // The rest of the array, if unused by the format string.
+  for (; index < aData.Length(); ++index) {
+    if (NS_WARN_IF(!aSequence.AppendElement(aData[index], fallible))) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+// Stringify and Concat all the JS::Value in a single string using ' ' as
+// separator. The new group name will be stored in aGroupStack array.
+static void ComposeAndStoreGroupName(JSContext* aCx,
+                                     const Sequence<JS::Value>& aData,
+                                     nsAString& aName,
+                                     nsTArray<nsString>* aGroupStack) {
+  StringJoinAppend(
+      aName, u" "_ns, aData, [aCx](nsAString& dest, const JS::Value& valueRef) {
+        JS::Rooted<JS::Value> value(aCx, valueRef);
+        JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+        if (!jsString) {
+          return;
+        }
+
+        nsAutoJSString string;
+        if (!string.init(aCx, jsString)) {
+          return;
+        }
+
+        dest.Append(string);
+      });
+
+  aGroupStack->AppendElement(aName);
+}
+
+// Remove the last group name and return that name. It returns false if
+// aGroupStack is empty.
+static bool UnstoreGroupName(nsAString& aName,
+                             nsTArray<nsString>* aGroupStack) {
+  if (aGroupStack->IsEmpty()) {
+    return false;
+  }
+
+  aName = aGroupStack->PopLastElement();
+  return true;
+}
+
+Console::TimerStatus Console::StartTimer(JSContext* aCx, const JS::Value& aName,
+                                         DOMHighResTimeStamp aTimestamp,
+                                         nsAString& aTimerLabel,
+                                         DOMHighResTimeStamp* aTimerValue) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aTimerValue);
+
+  *aTimerValue = 0;
+
+  if (NS_WARN_IF(mTimerRegistry.Count() >= MAX_PAGE_TIMERS)) {
+    return eTimerMaxReached;
+  }
+
+  JS::Rooted<JS::Value> name(aCx, aName);
+  JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, name));
+  if (NS_WARN_IF(!jsString)) {
+    return eTimerJSException;
+  }
+
+  nsAutoJSString label;
+  if (NS_WARN_IF(!label.init(aCx, jsString))) {
+    return eTimerJSException;
+  }
+
+  aTimerLabel = label;
+
+  if (mTimerRegistry.WithEntryHandle(label, [&](auto&& entry) {
+        if (entry) {
+          return true;
+        }
+        entry.Insert(aTimestamp);
+        return false;
+      })) {
+    return eTimerAlreadyExists;
+  }
+
+  *aTimerValue = aTimestamp;
+  return eTimerDone;
+}
+
+/* static */
+JS::Value Console::CreateStartTimerValue(JSContext* aCx,
+                                         const nsAString& aTimerLabel,
+                                         TimerStatus aTimerStatus) {
+  MOZ_ASSERT(aTimerStatus != eTimerUnknown);
+
+  if (aTimerStatus != eTimerDone) {
+    return CreateTimerError(aCx, aTimerLabel, aTimerStatus);
+  }
+
+  RootedDictionary<ConsoleTimerStart> timer(aCx);
+
+  timer.mName = aTimerLabel;
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!ToJSValue(aCx, timer, &value)) {
+    return JS::UndefinedValue();
+  }
+
+  return value;
+}
+
+Console::TimerStatus Console::LogTimer(JSContext* aCx, const JS::Value& aName,
+                                       DOMHighResTimeStamp aTimestamp,
+                                       nsAString& aTimerLabel,
+                                       double* aTimerDuration,
+                                       bool aCancelTimer) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aTimerDuration);
+
+  *aTimerDuration = 0;
+
+  JS::Rooted<JS::Value> name(aCx, aName);
+  JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, name));
+  if (NS_WARN_IF(!jsString)) {
+    return eTimerJSException;
+  }
+
+  nsAutoJSString key;
+  if (NS_WARN_IF(!key.init(aCx, jsString))) {
+    return eTimerJSException;
+  }
+
+  aTimerLabel = key;
+
+  DOMHighResTimeStamp value = 0;
+
+  if (aCancelTimer) {
+    if (!mTimerRegistry.Remove(key, &value)) {
+      NS_WARNING("mTimerRegistry entry not found");
+      return eTimerDoesntExist;
+    }
+  } else {
+    if (!mTimerRegistry.Get(key, &value)) {
+      NS_WARNING("mTimerRegistry entry not found");
+      return eTimerDoesntExist;
+    }
+  }
+
+  *aTimerDuration = aTimestamp - value;
+  return eTimerDone;
+}
+
+/* static */
+JS::Value Console::CreateLogOrEndTimerValue(JSContext* aCx,
+                                            const nsAString& aLabel,
+                                            double aDuration,
+                                            TimerStatus aStatus) {
+  if (aStatus != eTimerDone) {
+    return CreateTimerError(aCx, aLabel, aStatus);
+  }
+
+  RootedDictionary<ConsoleTimerLogOrEnd> timer(aCx);
+  timer.mName = aLabel;
+  timer.mDuration = aDuration;
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!ToJSValue(aCx, timer, &value)) {
+    return JS::UndefinedValue();
+  }
+
+  return value;
+}
+
+/* static */
+JS::Value Console::CreateTimerError(JSContext* aCx, const nsAString& aLabel,
+                                    TimerStatus aStatus) {
+  MOZ_ASSERT(aStatus != eTimerUnknown && aStatus != eTimerDone);
+
+  RootedDictionary<ConsoleTimerError> error(aCx);
+
+  error.mName = aLabel;
+
+  switch (aStatus) {
+    case eTimerAlreadyExists:
+      error.mError.AssignLiteral("timerAlreadyExists");
+      break;
+
+    case eTimerDoesntExist:
+      error.mError.AssignLiteral("timerDoesntExist");
+      break;
+
+    case eTimerJSException:
+      error.mError.AssignLiteral("timerJSError");
+      break;
+
+    case eTimerMaxReached:
+      error.mError.AssignLiteral("maxTimersExceeded");
+      break;
+
+    default:
+      MOZ_CRASH("Unsupported status");
+      break;
+  }
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!ToJSValue(aCx, error, &value)) {
+    return JS::UndefinedValue();
+  }
+
+  return value;
+}
+
+uint32_t Console::IncreaseCounter(JSContext* aCx,
+                                  const Sequence<JS::Value>& aArguments,
+                                  nsAString& aCountLabel) {
+  AssertIsOnOwningThread();
+
+  ConsoleCommon::ClearException ce(aCx);
+
+  MOZ_ASSERT(!aArguments.IsEmpty());
+
+  JS::Rooted<JS::Value> labelValue(aCx, aArguments[0]);
+  JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, labelValue));
+  if (!jsString) {
+    return 0;  // We cannot continue.
+  }
+
+  nsAutoJSString string;
+  if (!string.init(aCx, jsString)) {
+    return 0;  // We cannot continue.
+  }
+
+  aCountLabel = string;
+
+  const bool maxCountersReached = mCounterRegistry.Count() >= MAX_PAGE_COUNTERS;
+  return mCounterRegistry.WithEntryHandle(
+      aCountLabel, [maxCountersReached](auto&& entry) -> uint32_t {
+        if (entry) {
+          ++entry.Data();
+        } else {
+          if (maxCountersReached) {
+            return MAX_PAGE_COUNTERS;
+          }
+          entry.Insert(1);
+        }
+        return entry.Data();
+      });
+}
+
+uint32_t Console::ResetCounter(JSContext* aCx,
+                               const Sequence<JS::Value>& aArguments,
+                               nsAString& aCountLabel) {
+  AssertIsOnOwningThread();
+
+  ConsoleCommon::ClearException ce(aCx);
+
+  MOZ_ASSERT(!aArguments.IsEmpty());
+
+  JS::Rooted<JS::Value> labelValue(aCx, aArguments[0]);
+  JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, labelValue));
+  if (!jsString) {
+    return 0;  // We cannot continue.
+  }
+
+  nsAutoJSString string;
+  if (!string.init(aCx, jsString)) {
+    return 0;  // We cannot continue.
+  }
+
+  aCountLabel = string;
+
+  if (mCounterRegistry.Remove(aCountLabel)) {
+    return 0;
+  }
+
+  // Let's return something different than 0 if the key doesn't exist.
+  return MAX_PAGE_COUNTERS;
+}
+
+// This method generates a ConsoleCounter dictionary as JS::Value. If
+// aCountValue is == MAX_PAGE_COUNTERS it generates a ConsoleCounterError
+// instead. See IncreaseCounter.
+// * aCx - this is the context that will root the returned value.
+// * aCountLabel - this label must be what IncreaseCounter received as
+//                 aTimerLabel.
+// * aCountValue - the return value of IncreaseCounter.
+static JS::Value CreateCounterOrResetCounterValue(JSContext* aCx,
+                                                  const nsAString& aCountLabel,
+                                                  uint32_t aCountValue) {
+  ConsoleCommon::ClearException ce(aCx);
+
+  if (aCountValue == MAX_PAGE_COUNTERS) {
+    RootedDictionary<ConsoleCounterError> error(aCx);
+    error.mLabel = aCountLabel;
+    error.mError.AssignLiteral("counterDoesntExist");
+
+    JS::Rooted<JS::Value> value(aCx);
+    if (!ToJSValue(aCx, error, &value)) {
+      return JS::UndefinedValue();
+    }
+
+    return value;
+  }
+
+  RootedDictionary<ConsoleCounter> data(aCx);
+  data.mLabel = aCountLabel;
+  data.mCount = aCountValue;
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!ToJSValue(aCx, data, &value)) {
+    return JS::UndefinedValue();
+  }
+
+  return value;
+}
+
+/* static */
+bool Console::ShouldIncludeStackTrace(MethodName aMethodName) {
+  switch (aMethodName) {
+    case MethodError:
+    case MethodException:
+    case MethodAssert:
+    case MethodTrace:
+      return true;
+    default:
+      return false;
+  }
+}
+
+JSObject* MainThreadConsoleData::GetOrCreateSandbox(JSContext* aCx,
+                                                    nsIPrincipal* aPrincipal) {
+  AssertIsOnMainThread();
+
+  if (!mSandbox) {
+    nsIXPConnect* xpc = nsContentUtils::XPConnect();
+    MOZ_ASSERT(xpc, "This should never be null!");
+
+    JS::Rooted<JSObject*> sandbox(aCx);
+    nsresult rv = xpc->CreateSandbox(aCx, aPrincipal, sandbox.address());
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return nullptr;
+    }
+
+    mSandbox = new JSObjectHolder(aCx, sandbox);
+  }
+
+  return mSandbox->GetJSObject();
+}
+
+bool Console::StoreCallData(JSContext* aCx, ConsoleCallData* aCallData,
+                            const Sequence<JS::Value>& aArguments) {
+  AssertIsOnOwningThread();
+
+  if (NS_WARN_IF(!mArgumentStorage.growBy(1))) {
+    return false;
+  }
+  if (!mArgumentStorage.end()[-1].Initialize(aCx, aArguments)) {
+    mArgumentStorage.shrinkBy(1);
+    return false;
+  }
+
+  MOZ_ASSERT(aCallData);
+  MOZ_ASSERT(!mCallDataStorage.Contains(aCallData));
+
+  mCallDataStorage.AppendElement(aCallData);
+
+  MOZ_ASSERT(mCallDataStorage.Length() == mArgumentStorage.length());
+
+  if (mCallDataStorage.Length() > STORAGE_MAX_EVENTS) {
+    mCallDataStorage.RemoveElementAt(0);
+    mArgumentStorage.erase(&mArgumentStorage[0]);
+  }
+  return true;
+}
+
+void Console::UnstoreCallData(ConsoleCallData* aCallData) {
+  AssertIsOnOwningThread();
+
+  MOZ_ASSERT(aCallData);
+  MOZ_ASSERT(mCallDataStorage.Length() == mArgumentStorage.length());
+
+  size_t index = mCallDataStorage.IndexOf(aCallData);
+  // It can be that mCallDataStorage has been already cleaned in case the
+  // processing of the argument of some Console methods triggers the
+  // window.close().
+  if (index == mCallDataStorage.NoIndex) {
+    return;
+  }
+
+  mCallDataStorage.RemoveElementAt(index);
+  mArgumentStorage.erase(&mArgumentStorage[index]);
+}
+
+void Console::NotifyHandler(JSContext* aCx,
+                            const Sequence<JS::Value>& aArguments,
+                            ConsoleCallData* aCallData) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(aCallData);
+
+  if (!mConsoleEventNotifier) {
+    return;
+  }
+
+  JS::Rooted<JS::Value> value(aCx);
+
+  JS::Rooted<JSObject*> callableGlobal(
+      aCx, mConsoleEventNotifier->CallbackGlobalOrNull());
+  if (NS_WARN_IF(!callableGlobal)) {
+    return;
+  }
+
+  // aCx and aArguments are in the same compartment because this method is
+  // called directly when a Console.something() runs.
+  // mConsoleEventNotifier->CallbackGlobal() is the scope where value will be
+  // sent to.
+  if (NS_WARN_IF(!PopulateConsoleNotificationInTheTargetScope(
+          aCx, aArguments, callableGlobal, &value, aCallData, &mGroupStack))) {
+    return;
+  }
+
+  JS::Rooted<JS::Value> ignored(aCx);
+  RefPtr<AnyCallback> notifier(mConsoleEventNotifier);
+  notifier->Call(value, &ignored);
+}
+
+void Console::RetrieveConsoleEvents(JSContext* aCx,
+                                    nsTArray<JS::Value>& aEvents,
+                                    ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  // We don't want to expose this functionality to main-thread yet.
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  JS::Rooted<JSObject*> targetScope(aCx, JS::CurrentGlobalOrNull(aCx));
+
+  for (uint32_t i = 0; i < mArgumentStorage.length(); ++i) {
+    JS::Rooted<JS::Value> value(aCx);
+
+    JS::Rooted<JSObject*> sequenceScope(aCx, mArgumentStorage[i].Global());
+    JSAutoRealm ar(aCx, sequenceScope);
+
+    Sequence<JS::Value> sequence;
+    SequenceRooter<JS::Value> arguments(aCx, &sequence);
+
+    if (!mArgumentStorage[i].PopulateArgumentsSequence(sequence)) {
+      aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+      return;
+    }
+
+    // Here we have aCx and sequence in the same compartment.
+    // targetScope is the destination scope and value will be populated in its
+    // compartment.
+    if (NS_WARN_IF(!PopulateConsoleNotificationInTheTargetScope(
+            aCx, sequence, targetScope, &value, mCallDataStorage[i],
+            &mGroupStack))) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return;
+    }
+
+    aEvents.AppendElement(value);
+  }
+}
+
+void Console::SetConsoleEventHandler(AnyCallback* aHandler) {
+  AssertIsOnOwningThread();
+
+  // We don't want to expose this functionality to main-thread yet.
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  mConsoleEventNotifier = aHandler;
+}
+
+void Console::AssertIsOnOwningThread() const {
+  NS_ASSERT_OWNINGTHREAD(Console);
+}
+
+bool Console::IsShuttingDown() const {
+  MOZ_ASSERT(mStatus != eUnknown);
+  return mStatus == eShuttingDown;
+}
+
+/* static */
+already_AddRefed<Console> Console::GetConsole(const GlobalObject& aGlobal) {
+  ErrorResult rv;
+  RefPtr<Console> console = GetConsoleInternal(aGlobal, rv);
+  if (NS_WARN_IF(rv.Failed()) || !console) {
+    rv.SuppressException();
+    return nullptr;
+  }
+
+  console->AssertIsOnOwningThread();
+
+  if (console->IsShuttingDown()) {
+    return nullptr;
+  }
+
+  return console.forget();
+}
+
+/* static */
+already_AddRefed<Console> Console::GetConsoleInternal(
+    const GlobalObject& aGlobal, ErrorResult& aRv) {
+  // Window
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsPIDOMWindowInner> innerWindow =
+        do_QueryInterface(aGlobal.GetAsSupports());
+
+    // we are probably running a chrome script.
+    if (!innerWindow) {
+      RefPtr<Console> console = new Console(aGlobal.Context(), nullptr, 0, 0);
+      console->Initialize(aRv);
+      if (NS_WARN_IF(aRv.Failed())) {
+        return nullptr;
+      }
+
+      return console.forget();
+    }
+
+    nsGlobalWindowInner* window = nsGlobalWindowInner::Cast(innerWindow);
+    return window->GetConsole(aGlobal.Context(), aRv);
+  }
+
+  // Worklet
+  nsCOMPtr<WorkletGlobalScope> workletScope =
+      do_QueryInterface(aGlobal.GetAsSupports());
+  if (workletScope) {
+    WorkletThread::AssertIsOnWorkletThread();
+    return workletScope->GetConsole(aGlobal.Context(), aRv);
+  }
+
+  // Workers
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  JSContext* cx = aGlobal.Context();
+  WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(cx);
+  MOZ_ASSERT(workerPrivate);
+
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (NS_WARN_IF(!global)) {
+    return nullptr;
+  }
+
+  WorkerGlobalScope* scope = workerPrivate->GlobalScope();
+  MOZ_ASSERT(scope);
+
+  // Normal worker scope.
+  if (scope == global) {
+    return scope->GetConsole(aRv);
+  }
+
+  // Debugger worker scope
+
+  WorkerDebuggerGlobalScope* debuggerScope =
+      workerPrivate->DebuggerGlobalScope();
+  MOZ_ASSERT(debuggerScope);
+  MOZ_ASSERT(debuggerScope == global, "Which kind of global do we have?");
+
+  return debuggerScope->GetConsole(aRv);
+}
+
+bool Console::MonotonicTimer(JSContext* aCx, MethodName aMethodName,
+                             const Sequence<JS::Value>& aData,
+                             DOMHighResTimeStamp* aTimeStamp) {
+  if (nsCOMPtr<nsPIDOMWindowInner> innerWindow = do_QueryInterface(mGlobal)) {
+    nsGlobalWindowInner* win = nsGlobalWindowInner::Cast(innerWindow);
+    MOZ_ASSERT(win);
+
+    RefPtr<Performance> performance = win->GetPerformance();
+    if (!performance) {
+      return false;
+    }
+
+    *aTimeStamp = performance->Now();
+
+    nsDocShell* docShell = static_cast<nsDocShell*>(win->GetDocShell());
+    bool isTimelineRecording = TimelineConsumers::HasConsumer(docShell);
+
+    // The 'timeStamp' recordings do not need an argument; use empty string
+    // if no arguments passed in.
+    if (isTimelineRecording && aMethodName == MethodTimeStamp) {
+      JS::Rooted<JS::Value> value(
+          aCx, aData.Length() == 0 ? JS_GetEmptyStringValue(aCx) : aData[0]);
+      JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+      if (!jsString) {
+        return false;
+      }
+
+      nsAutoJSString key;
+      if (!key.init(aCx, jsString)) {
+        return false;
+      }
+
+      TimelineConsumers::AddMarkerForDocShell(
+          docShell, MakeUnique<TimestampTimelineMarker>(key));
+    }
+    // For `console.time(foo)` and `console.timeEnd(foo)`.
+    else if (isTimelineRecording && aData.Length() == 1) {
+      JS::Rooted<JS::Value> value(aCx, aData[0]);
+      JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, value));
+      if (!jsString) {
+        return false;
+      }
+
+      nsAutoJSString key;
+      if (!key.init(aCx, jsString)) {
+        return false;
+      }
+
+      TimelineConsumers::AddMarkerForDocShell(
+          docShell,
+          MakeUnique<ConsoleTimelineMarker>(key, aMethodName == MethodTime
+                                                     ? MarkerTracingType::START
+                                                     : MarkerTracingType::END));
+    }
+
+    return true;
+  }
+
+  if (NS_IsMainThread()) {
+    *aTimeStamp = (TimeStamp::Now() - mCreationTimeStamp).ToMilliseconds();
+    return true;
+  }
+
+  if (nsCOMPtr<WorkletGlobalScope> workletGlobal = do_QueryInterface(mGlobal)) {
+    *aTimeStamp = workletGlobal->TimeStampToDOMHighRes(TimeStamp::Now());
+    return true;
+  }
+
+  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+  MOZ_ASSERT(workerPrivate);
+
+  *aTimeStamp = workerPrivate->TimeStampToDOMHighRes(TimeStamp::Now());
+  return true;
+}
+
+/* static */
+already_AddRefed<ConsoleInstance> Console::CreateInstance(
+    const GlobalObject& aGlobal, const ConsoleInstanceOptions& aOptions) {
+  RefPtr<ConsoleInstance> console =
+      new ConsoleInstance(aGlobal.Context(), aOptions);
+  return console.forget();
+}
+
+void Console::StringifyElement(Element* aElement, nsAString& aOut) {
+  aOut.AppendLiteral("<");
+  aOut.Append(aElement->LocalName());
+  uint32_t attrCount = aElement->GetAttrCount();
+  nsAutoString idAttr;
+  nsAutoString classAttr;
+  nsAutoString nameAttr;
+  nsAutoString otherAttrs;
+  for (uint32_t i = 0; i < attrCount; i++) {
+    BorrowedAttrInfo attrInfo = aElement->GetAttrInfoAt(i);
+    nsAutoString attrValue;
+    attrInfo.mValue->ToString(attrValue);
+
+    const nsAttrName* attrName = attrInfo.mName;
+    if (attrName->Equals(nsGkAtoms::id)) {
+      idAttr.AppendLiteral(" id=\"");
+      idAttr.Append(attrValue);
+      idAttr.AppendLiteral("\"");
+    } else if (attrName->Equals(nsGkAtoms::_class)) {
+      classAttr.AppendLiteral(" class=\"");
+      classAttr.Append(attrValue);
+      classAttr.AppendLiteral("\"");
+    } else if (attrName->Equals(nsGkAtoms::name)) {
+      nameAttr.AppendLiteral(" name=\"");
+      nameAttr.Append(attrValue);
+      nameAttr.AppendLiteral("\"");
+    } else {
+      nsAutoString attrNameStr;
+      attrName->GetQualifiedName(attrNameStr);
+      otherAttrs.AppendLiteral(" ");
+      otherAttrs.Append(attrNameStr);
+      otherAttrs.AppendLiteral("=\"");
+      otherAttrs.Append(attrValue);
+      otherAttrs.AppendLiteral("\"");
+    }
+  }
+  if (!idAttr.IsEmpty()) {
+    aOut.Append(idAttr);
+  }
+  if (!classAttr.IsEmpty()) {
+    aOut.Append(classAttr);
+  }
+  if (!nameAttr.IsEmpty()) {
+    aOut.Append(nameAttr);
+  }
+  if (!otherAttrs.IsEmpty()) {
+    aOut.Append(otherAttrs);
+  }
+  aOut.AppendLiteral(">");
+}
+
+void Console::MaybeExecuteDumpFunction(JSContext* aCx,
+                                       const nsAString& aMethodName,
+                                       const Sequence<JS::Value>& aData,
+                                       nsIStackFrame* aStack) {
+  if (!mDumpFunction && !mDumpToStdout) {
+    return;
+  }
+
+  nsAutoString message;
+  message.AssignLiteral("console.");
+  message.Append(aMethodName);
+  message.AppendLiteral(": ");
+
+  if (!mPrefix.IsEmpty()) {
+    message.Append(mPrefix);
+    message.AppendLiteral(": ");
+  }
+
+  for (uint32_t i = 0; i < aData.Length(); ++i) {
+    JS::Rooted<JS::Value> v(aCx, aData[i]);
+    if (v.isObject()) {
+      Element* element = nullptr;
+      if (NS_SUCCEEDED(UNWRAP_OBJECT(Element, &v, element))) {
+        if (i != 0) {
+          message.AppendLiteral(" ");
+        }
+        StringifyElement(element, message);
+        continue;
+      }
+    }
+
+    JS::Rooted<JSString*> jsString(aCx, JS_ValueToSource(aCx, v));
+    if (!jsString) {
+      continue;
+    }
+
+    nsAutoJSString string;
+    if (NS_WARN_IF(!string.init(aCx, jsString))) {
+      return;
+    }
+
+    if (i != 0) {
+      message.AppendLiteral(" ");
+    }
+
+    message.Append(string);
+  }
+
+  message.AppendLiteral("\n");
+
+  // aStack can be null.
+
+  nsCOMPtr<nsIStackFrame> stack(aStack);
+
+  while (stack) {
+    nsAutoString filename;
+    stack->GetFilename(aCx, filename);
+
+    message.Append(filename);
+    message.AppendLiteral(" ");
+
+    message.AppendInt(stack->GetLineNumber(aCx));
+    message.AppendLiteral(" ");
+
+    nsAutoString functionName;
+    stack->GetName(aCx, functionName);
+
+    message.Append(functionName);
+    message.AppendLiteral("\n");
+
+    nsCOMPtr<nsIStackFrame> caller = stack->GetCaller(aCx);
+
+    if (!caller) {
+      caller = stack->GetAsyncCaller(aCx);
+    }
+
+    stack.swap(caller);
+  }
+
+  ExecuteDumpFunction(message);
+}
+
+void Console::MaybeExecuteDumpFunctionForTime(JSContext* aCx,
+                                              MethodName aMethodName,
+                                              const nsAString& aMethodString,
+                                              uint64_t aMonotonicTimer,
+                                              const JS::Value& aData) {
+  if (!mDumpFunction && !mDumpToStdout) {
+    return;
+  }
+
+  nsAutoString message;
+  message.AssignLiteral("console.");
+  message.Append(aMethodString);
+  message.AppendLiteral(": ");
+
+  if (!mPrefix.IsEmpty()) {
+    message.Append(mPrefix);
+    message.AppendLiteral(": ");
+  }
+
+  JS::Rooted<JS::Value> v(aCx, aData);
+  JS::Rooted<JSString*> jsString(aCx, JS_ValueToSource(aCx, v));
+  if (!jsString) {
+    return;
+  }
+
+  nsAutoJSString string;
+  if (NS_WARN_IF(!string.init(aCx, jsString))) {
+    return;
+  }
+
+  message.Append(string);
+  message.AppendLiteral(" @ ");
+  message.AppendInt(aMonotonicTimer);
+
+  message.AppendLiteral("\n");
+  ExecuteDumpFunction(message);
+}
+
+void Console::ExecuteDumpFunction(const nsAString& aMessage) {
+  if (mDumpFunction) {
+    RefPtr<ConsoleInstanceDumpCallback> dumpFunction(mDumpFunction);
+    dumpFunction->Call(aMessage);
+    return;
+  }
+
+  NS_ConvertUTF16toUTF8 str(aMessage);
+  MOZ_LOG(nsContentUtils::DOMDumpLog(), LogLevel::Debug, ("%s", str.get()));
+#ifdef ANDROID
+  __android_log_print(ANDROID_LOG_INFO, "Gecko", "%s", str.get());
+#endif
+  fputs(str.get(), stdout);
+  fflush(stdout);
+}
+
+ConsoleLogLevel PrefToValue(const nsAString& aPref,
+                            const ConsoleLogLevel aLevel) {
+  if (!NS_IsMainThread()) {
+    NS_WARNING("Console.maxLogLevelPref is not supported on workers!");
+    return ConsoleLogLevel::All;
+  }
+  if (aPref.IsEmpty()) {
+    return aLevel;
+  }
+
+  NS_ConvertUTF16toUTF8 pref(aPref);
+  nsAutoCString value;
+  nsresult rv = Preferences::GetCString(pref.get(), value);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return aLevel;
+  }
+
+  int index = FindEnumStringIndexImpl(value.get(), value.Length(),
+                                      ConsoleLogLevelValues::strings);
+  if (NS_WARN_IF(index < 0)) {
+    nsString message;
+    message.AssignLiteral("Invalid Console.maxLogLevelPref value: ");
+    message.Append(NS_ConvertUTF8toUTF16(value));
+
+    nsContentUtils::LogSimpleConsoleError(message, "chrome"_ns, false,
+                                          true /* from chrome context*/);
+    return aLevel;
+  }
+
+  MOZ_ASSERT(index < (int)ConsoleLogLevelValues::Count);
+  return static_cast<ConsoleLogLevel>(index);
+}
+
+bool Console::ShouldProceed(MethodName aName) const {
+  ConsoleLogLevel maxLogLevel = PrefToValue(mMaxLogLevelPref, mMaxLogLevel);
+  return WebIDLLogLevelToInteger(maxLogLevel) <=
+         InternalLogLevelToInteger(aName);
+}
+
+uint32_t Console::WebIDLLogLevelToInteger(ConsoleLogLevel aLevel) const {
+  switch (aLevel) {
+    case ConsoleLogLevel::All:
+      return 0;
+    case ConsoleLogLevel::Debug:
+      return 2;
+    case ConsoleLogLevel::Log:
+      return 3;
+    case ConsoleLogLevel::Info:
+      return 3;
+    case ConsoleLogLevel::Clear:
+      return 3;
+    case ConsoleLogLevel::Trace:
+      return 3;
+    case ConsoleLogLevel::TimeLog:
+      return 3;
+    case ConsoleLogLevel::TimeEnd:
+      return 3;
+    case ConsoleLogLevel::Time:
+      return 3;
+    case ConsoleLogLevel::Group:
+      return 3;
+    case ConsoleLogLevel::GroupEnd:
+      return 3;
+    case ConsoleLogLevel::Profile:
+      return 3;
+    case ConsoleLogLevel::ProfileEnd:
+      return 3;
+    case ConsoleLogLevel::Dir:
+      return 3;
+    case ConsoleLogLevel::Dirxml:
+      return 3;
+    case ConsoleLogLevel::Warn:
+      return 4;
+    case ConsoleLogLevel::Error:
+      return 5;
+    case ConsoleLogLevel::Off:
+      return UINT32_MAX;
+    default:
+      MOZ_CRASH(
+          "ConsoleLogLevel is out of sync with the Console implementation!");
+      return 0;
+  }
+}
+
+uint32_t Console::InternalLogLevelToInteger(MethodName aName) const {
+  switch (aName) {
+    case MethodLog:
+      return 3;
+    case MethodInfo:
+      return 3;
+    case MethodWarn:
+      return 4;
+    case MethodError:
+      return 5;
+    case MethodException:
+      return 5;
+    case MethodDebug:
+      return 2;
+    case MethodTable:
+      return 3;
+    case MethodTrace:
+      return 3;
+    case MethodDir:
+      return 3;
+    case MethodDirxml:
+      return 3;
+    case MethodGroup:
+      return 3;
+    case MethodGroupCollapsed:
+      return 3;
+    case MethodGroupEnd:
+      return 3;
+    case MethodTime:
+      return 3;
+    case MethodTimeLog:
+      return 3;
+    case MethodTimeEnd:
+      return 3;
+    case MethodTimeStamp:
+      return 3;
+    case MethodAssert:
+      return 3;
+    case MethodCount:
+      return 3;
+    case MethodCountReset:
+      return 3;
+    case MethodClear:
+      return 3;
+    case MethodProfile:
+      return 3;
+    case MethodProfileEnd:
+      return 3;
+    default:
+      MOZ_CRASH("MethodName is out of sync with the Console implementation!");
+      return 0;
+  }
+}
+
+bool Console::ArgumentData::Initialize(JSContext* aCx,
+                                       const Sequence<JS::Value>& aArguments) {
+  mGlobal = JS::CurrentGlobalOrNull(aCx);
+
+  if (NS_WARN_IF(!mArguments.AppendElements(aArguments, fallible))) {
+    return false;
+  }
+
+  return true;
+}
+
+void Console::ArgumentData::Trace(const TraceCallbacks& aCallbacks,
+                                  void* aClosure) {
+  ArgumentData* tmp = this;
+  for (uint32_t i = 0; i < mArguments.Length(); ++i) {
+    NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mArguments[i])
+  }
+
+  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mGlobal)
+}
+
+bool Console::ArgumentData::PopulateArgumentsSequence(
+    Sequence<JS::Value>& aSequence) const {
+  AssertIsOnOwningThread();
+
+  for (uint32_t i = 0; i < mArguments.Length(); ++i) {
+    if (NS_WARN_IF(!aSequence.AppendElement(mArguments[i], fallible))) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+}  // namespace mozilla::dom