Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

21 files changed, 3464 insertions, 0 deletions

diff --git a/mobile/android/components/geckoview/ColorPickerDelegate.jsm b/mobile/android/components/geckoview/ColorPickerDelegate.jsm
new file mode 100644
index 0000000000..b72662a316
--- /dev/null
+++ b/mobile/android/components/geckoview/ColorPickerDelegate.jsm
@@ -0,0 +1,43 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["ColorPickerDelegate"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("ColorPickerDelegate");
+
+class ColorPickerDelegate {
+  // TODO(bug 1805397): Implement default colors
+  init(aParent, aTitle, aInitialColor, aDefaultColors) {
+    this._prompt = new lazy.GeckoViewPrompter(aParent);
+    this._msg = {
+      type: "color",
+      title: aTitle,
+      value: aInitialColor,
+      predefinedValues: aDefaultColors,
+    };
+  }
+
+  open(aColorPickerShownCallback) {
+    this._prompt.asyncShowPrompt(this._msg, result => {
+      // OK: result
+      // Cancel: !result
+      aColorPickerShownCallback.done((result && result.color) || "");
+    });
+  }
+}
+
+ColorPickerDelegate.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIColorPicker",
+]);
diff --git a/mobile/android/components/geckoview/FilePickerDelegate.jsm b/mobile/android/components/geckoview/FilePickerDelegate.jsm
new file mode 100644
index 0000000000..32966b65e6
--- /dev/null
+++ b/mobile/android/components/geckoview/FilePickerDelegate.jsm
@@ -0,0 +1,194 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["FilePickerDelegate"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  FileUtils: "resource://gre/modules/FileUtils.sys.mjs",
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("FilePickerDelegate");
+
+class FilePickerDelegate {
+  /* ----------  nsIFilePicker  ---------- */
+  init(aParent, aTitle, aMode) {
+    if (
+      aMode === Ci.nsIFilePicker.modeGetFolder ||
+      aMode === Ci.nsIFilePicker.modeSave
+    ) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
+    }
+    this._prompt = new lazy.GeckoViewPrompter(aParent);
+    this._msg = {
+      type: "file",
+      title: aTitle,
+      mode: aMode === Ci.nsIFilePicker.modeOpenMultiple ? "multiple" : "single",
+    };
+    this._mode = aMode;
+    this._mimeTypes = [];
+    this._capture = 0;
+  }
+
+  get mode() {
+    return this._mode;
+  }
+
+  appendRawFilter(aFilter) {
+    this._mimeTypes.push(aFilter);
+  }
+
+  show() {
+    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
+  }
+
+  open(aFilePickerShownCallback) {
+    this._msg.mimeTypes = this._mimeTypes;
+    this._msg.capture = this._capture;
+    this._prompt.asyncShowPrompt(this._msg, result => {
+      // OK: result
+      // Cancel: !result
+      if (!result || !result.files || !result.files.length) {
+        aFilePickerShownCallback.done(Ci.nsIFilePicker.returnCancel);
+      } else {
+        this._resolveFiles(result.files, aFilePickerShownCallback);
+      }
+    });
+  }
+
+  async _resolveFiles(aFiles, aCallback) {
+    const fileData = [];
+
+    try {
+      for (const file of aFiles) {
+        const domFile = await this._getDOMFile(file);
+        fileData.push({
+          file,
+          domFile,
+        });
+      }
+    } catch (ex) {
+      warn`Error resolving files from file picker: ${ex}`;
+      aCallback.done(Ci.nsIFilePicker.returnCancel);
+      return;
+    }
+
+    this._fileData = fileData;
+    aCallback.done(Ci.nsIFilePicker.returnOK);
+  }
+
+  get file() {
+    if (!this._fileData) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_AVAILABLE);
+    }
+    const fileData = this._fileData[0];
+    if (!fileData) {
+      return null;
+    }
+    return new lazy.FileUtils.File(fileData.file);
+  }
+
+  get fileURL() {
+    return Services.io.newFileURI(this.file);
+  }
+
+  *_getEnumerator(aDOMFile) {
+    if (!this._fileData) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_AVAILABLE);
+    }
+
+    for (const fileData of this._fileData) {
+      if (aDOMFile) {
+        yield fileData.domFile;
+      }
+      yield new lazy.FileUtils.File(fileData.file);
+    }
+  }
+
+  get files() {
+    return this._getEnumerator(/* aDOMFile */ false);
+  }
+
+  _getDOMFile(aPath) {
+    if (this._prompt.domWin) {
+      return this._prompt.domWin.File.createFromFileName(aPath);
+    }
+    return File.createFromFileName(aPath);
+  }
+
+  get domFileOrDirectory() {
+    if (!this._fileData) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_AVAILABLE);
+    }
+    return this._fileData[0] ? this._fileData[0].domFile : null;
+  }
+
+  get domFileOrDirectoryEnumerator() {
+    return this._getEnumerator(/* aDOMFile */ true);
+  }
+
+  get defaultString() {
+    return "";
+  }
+
+  set defaultString(aValue) {}
+
+  get defaultExtension() {
+    return "";
+  }
+
+  set defaultExtension(aValue) {}
+
+  get filterIndex() {
+    return 0;
+  }
+
+  set filterIndex(aValue) {}
+
+  get displayDirectory() {
+    return null;
+  }
+
+  set displayDirectory(aValue) {}
+
+  get displaySpecialDirectory() {
+    return "";
+  }
+
+  set displaySpecialDirectory(aValue) {}
+
+  get addToRecentDocs() {
+    return false;
+  }
+
+  set addToRecentDocs(aValue) {}
+
+  get okButtonLabel() {
+    return "";
+  }
+
+  set okButtonLabel(aValue) {}
+
+  get capture() {
+    return this._capture;
+  }
+
+  set capture(aValue) {
+    this._capture = aValue;
+  }
+}
+
+FilePickerDelegate.prototype.classID = Components.ID(
+  "{e4565e36-f101-4bf5-950b-4be0887785a9}"
+);
+FilePickerDelegate.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIFilePicker",
+]);
diff --git a/mobile/android/components/geckoview/GeckoView.manifest b/mobile/android/components/geckoview/GeckoView.manifest
new file mode 100644
index 0000000000..472c4d7298
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoView.manifest
@@ -0,0 +1,4 @@
+# GeckoViewStartup.js
+category app-startup GeckoViewStartup @mozilla.org/geckoview/startup;1 process=main
+category content-process-ready-for-script GeckoViewStartup @mozilla.org/geckoview/startup;1 process=content
+category profile-after-change GeckoViewStartup @mozilla.org/geckoview/startup;1 process=main
diff --git a/mobile/android/components/geckoview/GeckoViewExternalAppService.cpp b/mobile/android/components/geckoview/GeckoViewExternalAppService.cpp
new file mode 100644
index 0000000000..30dedc9251
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewExternalAppService.cpp
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 "GeckoViewExternalAppService.h"
+
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "nsIChannel.h"
+
+#include "mozilla/widget/EventDispatcher.h"
+#include "mozilla/widget/nsWindow.h"
+#include "GeckoViewStreamListener.h"
+
+#include "JavaBuiltins.h"
+
+class StreamListener final : public mozilla::GeckoViewStreamListener {
+ public:
+  explicit StreamListener(nsWindow* aWindow)
+      : GeckoViewStreamListener(), mWindow(aWindow) {}
+
+  void SendWebResponse(mozilla::java::WebResponse::Param aResponse) {
+    mWindow->PassExternalResponse(aResponse);
+  }
+
+  void CompleteWithError(nsresult aStatus, nsIChannel* aChannel) {
+    // Currently we don't do anything about errors here
+  }
+
+  virtual ~StreamListener() {}
+
+ private:
+  RefPtr<nsWindow> mWindow;
+};
+
+mozilla::StaticRefPtr<GeckoViewExternalAppService>
+    GeckoViewExternalAppService::sService;
+
+/* static */
+already_AddRefed<GeckoViewExternalAppService>
+GeckoViewExternalAppService::GetSingleton() {
+  if (!sService) {
+    sService = new GeckoViewExternalAppService();
+  }
+  RefPtr<GeckoViewExternalAppService> service = sService;
+  return service.forget();
+}
+
+GeckoViewExternalAppService::GeckoViewExternalAppService() {}
+
+NS_IMPL_ISUPPORTS(GeckoViewExternalAppService, nsIExternalHelperAppService);
+
+NS_IMETHODIMP GeckoViewExternalAppService::DoContent(
+    const nsACString& aMimeContentType, nsIRequest* aRequest,
+    nsIInterfaceRequestor* aContentContext, bool aForceSave,
+    nsIInterfaceRequestor* aWindowContext,
+    nsIStreamListener** aStreamListener) {
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP GeckoViewExternalAppService::CreateListener(
+    const nsACString& aMimeContentType, nsIRequest* aRequest,
+    mozilla::dom::BrowsingContext* aContentContext, bool aForceSave,
+    nsIInterfaceRequestor* aWindowContext,
+    nsIStreamListener** aStreamListener) {
+  using namespace mozilla;
+  using namespace mozilla::dom;
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsresult rv;
+  nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest, &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIWidget> widget =
+      aContentContext->Canonical()->GetParentProcessWidgetContaining();
+  if (!widget) {
+    return NS_ERROR_ABORT;
+  }
+
+  RefPtr<nsWindow> window = nsWindow::From(widget);
+  MOZ_ASSERT(window);
+
+  RefPtr<StreamListener> listener = new StreamListener(window);
+
+  rv = channel->SetNotificationCallbacks(listener);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  listener.forget(aStreamListener);
+  return NS_OK;
+}
+
+NS_IMETHODIMP GeckoViewExternalAppService::ApplyDecodingForExtension(
+    const nsACString& aExtension, const nsACString& aEncodingType,
+    bool* aApplyDecoding) {
+  // This currently doesn't matter, because we never read the stream.
+  *aApplyDecoding = true;
+  return NS_OK;
+}
diff --git a/mobile/android/components/geckoview/GeckoViewExternalAppService.h b/mobile/android/components/geckoview/GeckoViewExternalAppService.h
new file mode 100644
index 0000000000..1dfb7c9491
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewExternalAppService.h
@@ -0,0 +1,26 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+#ifndef GeckoViewExternalAppService_h__
+#define GeckoViewExternalAppService_h__
+
+#include "nsIExternalHelperAppService.h"
+#include "mozilla/StaticPtr.h"
+
+class GeckoViewExternalAppService : public nsIExternalHelperAppService {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEXTERNALHELPERAPPSERVICE
+
+  GeckoViewExternalAppService();
+
+  static already_AddRefed<GeckoViewExternalAppService> GetSingleton();
+
+ private:
+  virtual ~GeckoViewExternalAppService() {}
+  static mozilla::StaticRefPtr<GeckoViewExternalAppService> sService;
+};
+
+#endif
diff --git a/mobile/android/components/geckoview/GeckoViewHistory.cpp b/mobile/android/components/geckoview/GeckoViewHistory.cpp
new file mode 100644
index 0000000000..c69e419b18
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewHistory.cpp
@@ -0,0 +1,508 @@
+/* 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 "GeckoViewHistory.h"
+
+#include "JavaBuiltins.h"
+#include "jsapi.h"
+#include "js/Array.h"               // JS::GetArrayLength, JS::IsArrayObject
+#include "js/PropertyAndElement.h"  // JS_GetElement
+#include "nsIURI.h"
+#include "nsXULAppAPI.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/StaticPrefs_layout.h"
+
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/Link.h"
+#include "mozilla/dom/BrowserChild.h"
+
+#include "mozilla/ipc/URIUtils.h"
+
+#include "mozilla/widget/EventDispatcher.h"
+#include "mozilla/widget/nsWindow.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::ipc;
+using namespace mozilla::widget;
+
+static const char16_t kOnVisitedMessage[] = u"GeckoView:OnVisited";
+static const char16_t kGetVisitedMessage[] = u"GeckoView:GetVisited";
+
+// Keep in sync with `GeckoSession.HistoryDelegate.VisitFlags`.
+enum class GeckoViewVisitFlags : int32_t {
+  VISIT_TOP_LEVEL = 1 << 0,
+  VISIT_REDIRECT_TEMPORARY = 1 << 1,
+  VISIT_REDIRECT_PERMANENT = 1 << 2,
+  VISIT_REDIRECT_SOURCE = 1 << 3,
+  VISIT_REDIRECT_SOURCE_PERMANENT = 1 << 4,
+  VISIT_UNRECOVERABLE_ERROR = 1 << 5,
+};
+
+GeckoViewHistory::GeckoViewHistory() {}
+
+GeckoViewHistory::~GeckoViewHistory() {}
+
+NS_IMPL_ISUPPORTS(GeckoViewHistory, IHistory)
+
+StaticRefPtr<GeckoViewHistory> GeckoViewHistory::sHistory;
+
+/* static */
+already_AddRefed<GeckoViewHistory> GeckoViewHistory::GetSingleton() {
+  if (!sHistory) {
+    sHistory = new GeckoViewHistory();
+    ClearOnShutdown(&sHistory);
+  }
+  RefPtr<GeckoViewHistory> history = sHistory;
+  return history.forget();
+}
+
+// Handles a request to fetch visited statuses for new tracked URIs in the
+// content process (e10s).
+void GeckoViewHistory::QueryVisitedStateInContentProcess(
+    const PendingVisitedQueries& aQueries) {
+  // Holds an array of new tracked URIs for a tab in the content process.
+  struct NewURIEntry {
+    explicit NewURIEntry(BrowserChild* aBrowserChild, nsIURI* aURI)
+        : mBrowserChild(aBrowserChild) {
+      AddURI(aURI);
+    }
+
+    void AddURI(nsIURI* aURI) { mURIs.AppendElement(aURI); }
+
+    BrowserChild* mBrowserChild;
+    nsTArray<RefPtr<nsIURI>> mURIs;
+  };
+
+  MOZ_ASSERT(XRE_IsContentProcess());
+
+  // First, serialize all the new URIs that we need to look up. Note that this
+  // could be written as `nsTHashMap<nsUint64HashKey,
+  // nsTArray<URIParams>` instead, but, since we don't expect to have many tab
+  // children, we can avoid the cost of hashing.
+  AutoTArray<NewURIEntry, 8> newEntries;
+  for (auto& query : aQueries) {
+    nsIURI* uri = query.GetKey();
+    MOZ_ASSERT(query.GetData().IsEmpty(),
+               "Shouldn't have parents to notify in child processes");
+    auto entry = mTrackedURIs.Lookup(uri);
+    if (!entry) {
+      continue;
+    }
+    ObservingLinks& links = entry.Data();
+    for (Link* link : links.mLinks.BackwardRange()) {
+      nsIWidget* widget = nsContentUtils::WidgetForContent(link->GetElement());
+      if (!widget) {
+        continue;
+      }
+      BrowserChild* browserChild = widget->GetOwningBrowserChild();
+      if (!browserChild) {
+        continue;
+      }
+      // Add to the list of new URIs for this document, or make a new entry.
+      bool hasEntry = false;
+      for (NewURIEntry& entry : newEntries) {
+        if (entry.mBrowserChild == browserChild) {
+          entry.AddURI(uri);
+          hasEntry = true;
+          break;
+        }
+      }
+      if (!hasEntry) {
+        newEntries.AppendElement(NewURIEntry(browserChild, uri));
+      }
+    }
+  }
+
+  // Send the request to the parent process, one message per tab child.
+  for (const NewURIEntry& entry : newEntries) {
+    Unused << NS_WARN_IF(
+        !entry.mBrowserChild->SendQueryVisitedState(entry.mURIs));
+  }
+}
+
+// Handles a request to fetch visited statuses for new tracked URIs in the
+// parent process (non-e10s).
+void GeckoViewHistory::QueryVisitedStateInParentProcess(
+    const PendingVisitedQueries& aQueries) {
+  // Holds an array of new URIs for a window in the parent process. Unlike
+  // the content process case, we don't need to track tab children, since we
+  // have the outer window and can send the request directly to Java.
+  struct NewURIEntry {
+    explicit NewURIEntry(nsIWidget* aWidget, nsIURI* aURI) : mWidget(aWidget) {
+      AddURI(aURI);
+    }
+
+    void AddURI(nsIURI* aURI) { mURIs.AppendElement(aURI); }
+
+    nsCOMPtr<nsIWidget> mWidget;
+    nsTArray<RefPtr<nsIURI>> mURIs;
+  };
+
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsTArray<NewURIEntry> newEntries;
+  for (const auto& query : aQueries) {
+    nsIURI* uri = query.GetKey();
+    auto entry = mTrackedURIs.Lookup(uri);
+    if (!entry) {
+      continue;  // Nobody cares about this uri anymore.
+    }
+
+    ObservingLinks& links = entry.Data();
+    nsTObserverArray<Link*>::BackwardIterator linksIter(links.mLinks);
+    while (linksIter.HasMore()) {
+      Link* link = linksIter.GetNext();
+
+      nsIWidget* widget = nsContentUtils::WidgetForContent(link->GetElement());
+      if (!widget) {
+        continue;
+      }
+
+      bool hasEntry = false;
+      for (NewURIEntry& entry : newEntries) {
+        if (entry.mWidget != widget) {
+          continue;
+        }
+        entry.AddURI(uri);
+        hasEntry = true;
+      }
+      if (!hasEntry) {
+        newEntries.AppendElement(NewURIEntry(widget, uri));
+      }
+    }
+  }
+
+  for (NewURIEntry& entry : newEntries) {
+    QueryVisitedState(entry.mWidget, nullptr, std::move(entry.mURIs));
+  }
+}
+
+void GeckoViewHistory::StartPendingVisitedQueries(
+    PendingVisitedQueries&& aQueries) {
+  if (XRE_IsContentProcess()) {
+    QueryVisitedStateInContentProcess(aQueries);
+  } else {
+    QueryVisitedStateInParentProcess(aQueries);
+  }
+}
+
+/**
+ * Called from the session handler for the history delegate, after the new
+ * visit is recorded.
+ */
+class OnVisitedCallback final : public nsIAndroidEventCallback {
+ public:
+  explicit OnVisitedCallback(GeckoViewHistory* aHistory, nsIURI* aURI)
+      : mHistory(aHistory), mURI(aURI) {}
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD
+  OnSuccess(JS::Handle<JS::Value> aData, JSContext* aCx) override {
+    Maybe<bool> visitedState = GetVisitedValue(aCx, aData);
+    JS_ClearPendingException(aCx);
+    if (visitedState) {
+      AutoTArray<VisitedURI, 1> visitedURIs;
+      visitedURIs.AppendElement(VisitedURI{mURI.get(), *visitedState});
+      mHistory->HandleVisitedState(visitedURIs, nullptr);
+    }
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  OnError(JS::Handle<JS::Value> aData, JSContext* aCx) override {
+    return NS_OK;
+  }
+
+ private:
+  virtual ~OnVisitedCallback() {}
+
+  Maybe<bool> GetVisitedValue(JSContext* aCx, JS::Handle<JS::Value> aData) {
+    if (NS_WARN_IF(!aData.isBoolean())) {
+      return Nothing();
+    }
+    return Some(aData.toBoolean());
+  }
+
+  RefPtr<GeckoViewHistory> mHistory;
+  nsCOMPtr<nsIURI> mURI;
+};
+
+NS_IMPL_ISUPPORTS(OnVisitedCallback, nsIAndroidEventCallback)
+
+NS_IMETHODIMP
+GeckoViewHistory::VisitURI(nsIWidget* aWidget, nsIURI* aURI,
+                           nsIURI* aLastVisitedURI, uint32_t aFlags,
+                           uint64_t aBrowserId) {
+  if (!aURI) {
+    return NS_OK;
+  }
+
+  if (XRE_IsContentProcess()) {
+    // If we're in the content process, send the visit to the parent. The parent
+    // will find the matching chrome window for the content process and tab,
+    // then forward the visit to Java.
+    if (NS_WARN_IF(!aWidget)) {
+      return NS_OK;
+    }
+    BrowserChild* browserChild = aWidget->GetOwningBrowserChild();
+    if (NS_WARN_IF(!browserChild)) {
+      return NS_OK;
+    }
+    Unused << NS_WARN_IF(
+        !browserChild->SendVisitURI(aURI, aLastVisitedURI, aFlags, aBrowserId));
+    return NS_OK;
+  }
+
+  // Otherwise, we're in the parent process. Wrap the URIs up in a bundle, and
+  // send them to Java.
+  MOZ_ASSERT(XRE_IsParentProcess());
+  RefPtr<nsWindow> window = nsWindow::From(aWidget);
+  if (NS_WARN_IF(!window)) {
+    return NS_OK;
+  }
+  widget::EventDispatcher* dispatcher = window->GetEventDispatcher();
+  if (NS_WARN_IF(!dispatcher)) {
+    return NS_OK;
+  }
+
+  // If nobody is listening for this, we can stop now.
+  if (!dispatcher->HasListener(kOnVisitedMessage)) {
+    return NS_OK;
+  }
+
+  AutoTArray<jni::String::LocalRef, 3> keys;
+  AutoTArray<jni::Object::LocalRef, 3> values;
+
+  nsAutoCString uriSpec;
+  if (NS_WARN_IF(NS_FAILED(aURI->GetSpec(uriSpec)))) {
+    return NS_OK;
+  }
+  keys.AppendElement(jni::StringParam(u"url"_ns));
+  values.AppendElement(jni::StringParam(uriSpec));
+
+  if (aLastVisitedURI) {
+    nsAutoCString lastVisitedURISpec;
+    if (NS_WARN_IF(NS_FAILED(aLastVisitedURI->GetSpec(lastVisitedURISpec)))) {
+      return NS_OK;
+    }
+    keys.AppendElement(jni::StringParam(u"lastVisitedURL"_ns));
+    values.AppendElement(jni::StringParam(lastVisitedURISpec));
+  }
+
+  int32_t flags = 0;
+  if (aFlags & TOP_LEVEL) {
+    flags |= static_cast<int32_t>(GeckoViewVisitFlags::VISIT_TOP_LEVEL);
+  }
+  if (aFlags & REDIRECT_TEMPORARY) {
+    flags |=
+        static_cast<int32_t>(GeckoViewVisitFlags::VISIT_REDIRECT_TEMPORARY);
+  }
+  if (aFlags & REDIRECT_PERMANENT) {
+    flags |=
+        static_cast<int32_t>(GeckoViewVisitFlags::VISIT_REDIRECT_PERMANENT);
+  }
+  if (aFlags & REDIRECT_SOURCE) {
+    flags |= static_cast<int32_t>(GeckoViewVisitFlags::VISIT_REDIRECT_SOURCE);
+  }
+  if (aFlags & REDIRECT_SOURCE_PERMANENT) {
+    flags |= static_cast<int32_t>(
+        GeckoViewVisitFlags::VISIT_REDIRECT_SOURCE_PERMANENT);
+  }
+  if (aFlags & UNRECOVERABLE_ERROR) {
+    flags |=
+        static_cast<int32_t>(GeckoViewVisitFlags::VISIT_UNRECOVERABLE_ERROR);
+  }
+  keys.AppendElement(jni::StringParam(u"flags"_ns));
+  values.AppendElement(java::sdk::Integer::ValueOf(flags));
+
+  MOZ_ASSERT(keys.Length() == values.Length());
+
+  auto bundleKeys = jni::ObjectArray::New<jni::String>(keys.Length());
+  auto bundleValues = jni::ObjectArray::New<jni::Object>(values.Length());
+  for (size_t i = 0; i < keys.Length(); ++i) {
+    bundleKeys->SetElement(i, keys[i]);
+    bundleValues->SetElement(i, values[i]);
+  }
+  auto bundle = java::GeckoBundle::New(bundleKeys, bundleValues);
+
+  nsCOMPtr<nsIAndroidEventCallback> callback =
+      new OnVisitedCallback(this, aURI);
+
+  Unused << NS_WARN_IF(
+      NS_FAILED(dispatcher->Dispatch(kOnVisitedMessage, bundle, callback)));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GeckoViewHistory::SetURITitle(nsIURI* aURI, const nsAString& aTitle) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+/**
+ * Called from the session handler for the history delegate, with visited
+ * statuses for all requested URIs.
+ */
+class GetVisitedCallback final : public nsIAndroidEventCallback {
+ public:
+  explicit GetVisitedCallback(GeckoViewHistory* aHistory,
+                              ContentParent* aInterestedProcess,
+                              nsTArray<RefPtr<nsIURI>>&& aURIs)
+      : mHistory(aHistory),
+        mInterestedProcess(aInterestedProcess),
+        mURIs(std::move(aURIs)) {}
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD
+  OnSuccess(JS::Handle<JS::Value> aData, JSContext* aCx) override {
+    nsTArray<VisitedURI> visitedURIs;
+    if (!ExtractVisitedURIs(aCx, aData, visitedURIs)) {
+      JS_ClearPendingException(aCx);
+      return NS_ERROR_FAILURE;
+    }
+    IHistory::ContentParentSet interestedProcesses;
+    if (mInterestedProcess) {
+      interestedProcesses.Insert(mInterestedProcess);
+    }
+    mHistory->HandleVisitedState(visitedURIs, &interestedProcesses);
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  OnError(JS::Handle<JS::Value> aData, JSContext* aCx) override {
+    return NS_OK;
+  }
+
+ private:
+  virtual ~GetVisitedCallback() {}
+
+  /**
+   * Unpacks an array of Boolean visited statuses from the session handler into
+   * an array of `VisitedURI` structs. Each element in the array corresponds to
+   * a URI in `mURIs`.
+   *
+   * Returns `false` on error, `true` if the array is `null` or was successfully
+   * unpacked.
+   *
+   * TODO (bug 1503482): Remove this unboxing.
+   */
+  bool ExtractVisitedURIs(JSContext* aCx, JS::Handle<JS::Value> aData,
+                          nsTArray<VisitedURI>& aVisitedURIs) {
+    if (aData.isNull()) {
+      return true;
+    }
+    bool isArray = false;
+    if (NS_WARN_IF(!JS::IsArrayObject(aCx, aData, &isArray))) {
+      return false;
+    }
+    if (NS_WARN_IF(!isArray)) {
+      return false;
+    }
+    JS::Rooted<JSObject*> visited(aCx, &aData.toObject());
+    uint32_t length = 0;
+    if (NS_WARN_IF(!JS::GetArrayLength(aCx, visited, &length))) {
+      return false;
+    }
+    if (NS_WARN_IF(length != mURIs.Length())) {
+      return false;
+    }
+    if (!aVisitedURIs.SetCapacity(length, mozilla::fallible)) {
+      return false;
+    }
+    for (uint32_t i = 0; i < length; ++i) {
+      JS::Rooted<JS::Value> value(aCx);
+      if (NS_WARN_IF(!JS_GetElement(aCx, visited, i, &value))) {
+        JS_ClearPendingException(aCx);
+        aVisitedURIs.AppendElement(VisitedURI{mURIs[i].get(), false});
+        continue;
+      }
+      if (NS_WARN_IF(!value.isBoolean())) {
+        aVisitedURIs.AppendElement(VisitedURI{mURIs[i].get(), false});
+        continue;
+      }
+      aVisitedURIs.AppendElement(VisitedURI{mURIs[i].get(), value.toBoolean()});
+    }
+    return true;
+  }
+
+  RefPtr<GeckoViewHistory> mHistory;
+  RefPtr<ContentParent> mInterestedProcess;
+  nsTArray<RefPtr<nsIURI>> mURIs;
+};
+
+NS_IMPL_ISUPPORTS(GetVisitedCallback, nsIAndroidEventCallback)
+
+/**
+ * Queries the history delegate to find which URIs have been visited. This
+ * is always called in the parent process: from `GetVisited` in non-e10s, and
+ * from `ContentParent::RecvGetVisited` in e10s.
+ */
+void GeckoViewHistory::QueryVisitedState(nsIWidget* aWidget,
+                                         ContentParent* aInterestedProcess,
+                                         nsTArray<RefPtr<nsIURI>>&& aURIs) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  RefPtr<nsWindow> window = nsWindow::From(aWidget);
+  if (NS_WARN_IF(!window)) {
+    return;
+  }
+  widget::EventDispatcher* dispatcher = window->GetEventDispatcher();
+  if (NS_WARN_IF(!dispatcher)) {
+    return;
+  }
+
+  // If nobody is listening for this we can stop now
+  if (!dispatcher->HasListener(kGetVisitedMessage)) {
+    return;
+  }
+
+  // Assemble a bundle like `{ urls: ["http://example.com/1", ...] }`.
+  auto uris = jni::ObjectArray::New<jni::String>(aURIs.Length());
+  for (size_t i = 0; i < aURIs.Length(); ++i) {
+    nsAutoCString uriSpec;
+    if (NS_WARN_IF(NS_FAILED(aURIs[i]->GetSpec(uriSpec)))) {
+      continue;
+    }
+    jni::String::LocalRef value{jni::StringParam(uriSpec)};
+    uris->SetElement(i, value);
+  }
+
+  auto bundleKeys = jni::ObjectArray::New<jni::String>(1);
+  jni::String::LocalRef key(jni::StringParam(u"urls"_ns));
+  bundleKeys->SetElement(0, key);
+
+  auto bundleValues = jni::ObjectArray::New<jni::Object>(1);
+  jni::Object::LocalRef value(uris);
+  bundleValues->SetElement(0, value);
+
+  auto bundle = java::GeckoBundle::New(bundleKeys, bundleValues);
+
+  nsCOMPtr<nsIAndroidEventCallback> callback =
+      new GetVisitedCallback(this, aInterestedProcess, std::move(aURIs));
+
+  Unused << NS_WARN_IF(
+      NS_FAILED(dispatcher->Dispatch(kGetVisitedMessage, bundle, callback)));
+}
+
+/**
+ * Updates link states for all tracked links, forwarding the visited statuses to
+ * the content process in e10s. This is always called in the parent process,
+ * from `VisitedCallback::OnSuccess` and `GetVisitedCallback::OnSuccess`.
+ */
+void GeckoViewHistory::HandleVisitedState(
+    const nsTArray<VisitedURI>& aVisitedURIs,
+    ContentParentSet* aInterestedProcesses) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  for (const VisitedURI& visitedURI : aVisitedURIs) {
+    auto status =
+        visitedURI.mVisited ? VisitedStatus::Visited : VisitedStatus::Unvisited;
+    NotifyVisited(visitedURI.mURI, status, aInterestedProcesses);
+  }
+}
diff --git a/mobile/android/components/geckoview/GeckoViewHistory.h b/mobile/android/components/geckoview/GeckoViewHistory.h
new file mode 100644
index 0000000000..a3b96ba58f
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewHistory.h
@@ -0,0 +1,60 @@
+/* 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/. */
+
+#ifndef GECKOVIEWHISTORY_H
+#define GECKOVIEWHISTORY_H
+
+#include "mozilla/BaseHistory.h"
+#include "nsTObserverArray.h"
+#include "nsURIHashKey.h"
+#include "nsINamed.h"
+#include "nsITimer.h"
+#include "nsIURI.h"
+
+#include "mozilla/StaticPtr.h"
+
+class nsIWidget;
+
+namespace mozilla {
+namespace dom {
+class Document;
+}
+}  // namespace mozilla
+
+struct VisitedURI {
+  nsCOMPtr<nsIURI> mURI;
+  bool mVisited = false;
+};
+
+class GeckoViewHistory final : public mozilla::BaseHistory {
+ public:
+  NS_DECL_ISUPPORTS
+
+  // IHistory
+  NS_IMETHOD VisitURI(nsIWidget*, nsIURI*, nsIURI* aLastVisitedURI,
+                      uint32_t aFlags, uint64_t aBrowserId) final;
+  NS_IMETHOD SetURITitle(nsIURI*, const nsAString&) final;
+
+  static already_AddRefed<GeckoViewHistory> GetSingleton();
+
+  void StartPendingVisitedQueries(PendingVisitedQueries&&) final;
+
+  GeckoViewHistory();
+
+  void QueryVisitedState(nsIWidget* aWidget,
+                         mozilla::dom::ContentParent* aInterestedProcess,
+                         nsTArray<RefPtr<nsIURI>>&& aURIs);
+  void HandleVisitedState(const nsTArray<VisitedURI>& aVisitedURIs,
+                          ContentParentSet* aInterestedProcesses);
+
+ private:
+  virtual ~GeckoViewHistory();
+
+  void QueryVisitedStateInContentProcess(const PendingVisitedQueries&);
+  void QueryVisitedStateInParentProcess(const PendingVisitedQueries&);
+
+  static mozilla::StaticRefPtr<GeckoViewHistory> sHistory;
+};
+
+#endif
diff --git a/mobile/android/components/geckoview/GeckoViewOutputStream.cpp b/mobile/android/components/geckoview/GeckoViewOutputStream.cpp
new file mode 100644
index 0000000000..6368363f59
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewOutputStream.cpp
@@ -0,0 +1,61 @@
+/* -*- Mode: c++; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil; -*-
+ * 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 "GeckoViewOutputStream.h"
+#include "mozilla/fallible.h"
+
+using namespace mozilla;
+
+NS_IMPL_ISUPPORTS(GeckoViewOutputStream, nsIOutputStream);
+
+NS_IMETHODIMP
+GeckoViewOutputStream::Close() {
+  mStream->SendEof();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GeckoViewOutputStream::Flush() { return NS_ERROR_NOT_IMPLEMENTED; }
+
+NS_IMETHODIMP
+GeckoViewOutputStream::StreamStatus() {
+  return mStream->IsStreamClosed() ? NS_BASE_STREAM_CLOSED : NS_OK;
+}
+
+NS_IMETHODIMP
+GeckoViewOutputStream::Write(const char* buf, uint32_t count,
+                             uint32_t* retval) {
+  jni::ByteArray::LocalRef buffer = jni::ByteArray::New(
+      reinterpret_cast<const int8_t*>(buf), count, fallible);
+  if (!buffer) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  if (NS_FAILED(mStream->AppendBuffer(buffer))) {
+    // The stream was closed, abort reading this channel.
+    return NS_BASE_STREAM_CLOSED;
+  }
+  // Return amount of bytes written
+  *retval = count;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GeckoViewOutputStream::WriteFrom(nsIInputStream* fromStream, uint32_t count,
+                                 uint32_t* retval) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GeckoViewOutputStream::WriteSegments(nsReadSegmentFun reader, void* closure,
+                                     uint32_t count, uint32_t* retval) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GeckoViewOutputStream::IsNonBlocking(bool* retval) {
+  *retval = true;
+  return NS_OK;
+}
diff --git a/mobile/android/components/geckoview/GeckoViewOutputStream.h b/mobile/android/components/geckoview/GeckoViewOutputStream.h
new file mode 100644
index 0000000000..70ab8a9198
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewOutputStream.h
@@ -0,0 +1,29 @@
+
+/* -*- Mode: c++; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil; -*-
+ * 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/. */
+
+#ifndef GeckoViewOutputStream_h__
+#define GeckoViewOutputStream_h__
+
+#include "mozilla/java/GeckoInputStreamNatives.h"
+#include "mozilla/java/GeckoInputStreamWrappers.h"
+
+#include "nsIOutputStream.h"
+#include "nsIRequest.h"
+
+class GeckoViewOutputStream : public nsIOutputStream {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIOUTPUTSTREAM
+  explicit GeckoViewOutputStream(
+      mozilla::java::GeckoInputStream::GlobalRef aStream)
+      : mStream(aStream) {}
+
+ private:
+  const mozilla::java::GeckoInputStream::GlobalRef mStream;
+  virtual ~GeckoViewOutputStream() = default;
+};
+
+#endif  // GeckoViewOutputStream_h__
diff --git a/mobile/android/components/geckoview/GeckoViewPermission.jsm b/mobile/android/components/geckoview/GeckoViewPermission.jsm
new file mode 100644
index 0000000000..88ab64ab9d
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewPermission.jsm
@@ -0,0 +1,41 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["GeckoViewPermission"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+class GeckoViewPermission {
+  constructor() {
+    this.wrappedJSObject = this;
+  }
+
+  async prompt(aRequest) {
+    const window = aRequest.window
+      ? aRequest.window
+      : aRequest.element.ownerGlobal;
+
+    const actor = window.windowGlobalChild.getActor("GeckoViewPermission");
+    const result = await actor.promptPermission(aRequest);
+    if (!result.allow) {
+      aRequest.cancel();
+    } else {
+      // Note: permission could be undefined, that's what aRequest expects.
+      const { permission } = result;
+      aRequest.allow(permission);
+    }
+  }
+}
+
+GeckoViewPermission.prototype.classID = Components.ID(
+  "{42f3c238-e8e8-4015-9ca2-148723a8afcf}"
+);
+GeckoViewPermission.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIContentPermissionPrompt",
+]);
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewPermission");
diff --git a/mobile/android/components/geckoview/GeckoViewPrompt.jsm b/mobile/android/components/geckoview/GeckoViewPrompt.jsm
new file mode 100644
index 0000000000..af488279c9
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewPrompt.jsm
@@ -0,0 +1,826 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["PromptFactory"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  DeferredTask: "resource://gre/modules/DeferredTask.sys.mjs",
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewPrompt");
+
+class PromptFactory {
+  constructor() {
+    this.wrappedJSObject = this;
+  }
+
+  handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "mozshowdropdown":
+      case "mozshowdropdown-sourcetouch":
+        this._handleSelect(aEvent.composedTarget, /* aIsDropDown = */ true);
+        break;
+      case "MozOpenDateTimePicker":
+        this._handleDateTime(aEvent.composedTarget);
+        break;
+      case "click":
+        this._handleClick(aEvent);
+        break;
+      case "DOMPopupBlocked":
+        this._handlePopupBlocked(aEvent);
+        break;
+    }
+  }
+
+  _handleClick(aEvent) {
+    const target = aEvent.composedTarget;
+    const className = ChromeUtils.getClassName(target);
+    if (className !== "HTMLInputElement" && className !== "HTMLSelectElement") {
+      return;
+    }
+
+    if (
+      target.isContentEditable ||
+      target.disabled ||
+      target.readOnly ||
+      !target.willValidate
+    ) {
+      // target.willValidate is false when any associated fieldset is disabled,
+      // in which case this element is treated as disabled per spec.
+      return;
+    }
+
+    if (className === "HTMLSelectElement") {
+      if (!target.isCombobox) {
+        this._handleSelect(target, /* aIsDropDown = */ false);
+        return;
+      }
+      // combobox select is handled by mozshowdropdown.
+      return;
+    }
+
+    const type = target.type;
+    if (type === "month" || type === "week") {
+      // If there's a shadow root, the MozOpenDateTimePicker event takes care
+      // of this. Right now for these input types there's never a shadow root.
+      // Once we support UA widgets for month/week inputs (see bug 888320), we
+      // can remove this.
+      if (!target.openOrClosedShadowRoot) {
+        this._handleDateTime(target);
+        aEvent.preventDefault();
+      }
+    }
+  }
+
+  _generateSelectItems(aElement) {
+    const win = aElement.ownerGlobal;
+    let id = 0;
+    const map = {};
+
+    const items = (function enumList(elem, disabled) {
+      const items = [];
+      const children = elem.children;
+      for (let i = 0; i < children.length; i++) {
+        const child = children[i];
+        if (win.getComputedStyle(child).display === "none") {
+          continue;
+        }
+        const item = {
+          id: String(id),
+          disabled: disabled || child.disabled,
+        };
+        if (win.HTMLOptGroupElement.isInstance(child)) {
+          item.label = child.label;
+          item.items = enumList(child, item.disabled);
+        } else if (win.HTMLOptionElement.isInstance(child)) {
+          item.label = child.label || child.text;
+          item.selected = child.selected;
+        } else {
+          continue;
+        }
+        items.push(item);
+        map[id++] = child;
+      }
+      return items;
+    })(aElement);
+
+    return [items, map, id];
+  }
+
+  _handleSelect(aElement, aIsDropDown) {
+    const win = aElement.ownerGlobal;
+    const [items] = this._generateSelectItems(aElement);
+
+    if (aIsDropDown) {
+      aElement.openInParentProcess = true;
+    }
+
+    const prompt = new lazy.GeckoViewPrompter(win);
+
+    // Something changed the <select> while it was open.
+    const deferredUpdate = new lazy.DeferredTask(() => {
+      // Inner contents in choice prompt are updated.
+      const [newItems] = this._generateSelectItems(aElement);
+      prompt.update({
+        type: "choice",
+        mode: aElement.multiple ? "multiple" : "single",
+        choices: newItems,
+      });
+    }, 0);
+    const mut = new win.MutationObserver(() => {
+      deferredUpdate.arm();
+    });
+    mut.observe(aElement, {
+      childList: true,
+      subtree: true,
+      attributes: true,
+    });
+
+    const dismissPrompt = () => prompt.dismiss();
+    aElement.addEventListener("blur", dismissPrompt, { mozSystemGroup: true });
+    const hidedropdown = event => {
+      if (aElement === event.target) {
+        prompt.dismiss();
+      }
+    };
+    const chromeEventHandler = aElement.ownerGlobal.docShell.chromeEventHandler;
+    chromeEventHandler.addEventListener("mozhidedropdown", hidedropdown, {
+      mozSystemGroup: true,
+    });
+
+    prompt.asyncShowPrompt(
+      {
+        type: "choice",
+        mode: aElement.multiple ? "multiple" : "single",
+        choices: items,
+      },
+      result => {
+        deferredUpdate.disarm();
+        mut.disconnect();
+        aElement.removeEventListener("blur", dismissPrompt, {
+          mozSystemGroup: true,
+        });
+        chromeEventHandler.removeEventListener(
+          "mozhidedropdown",
+          hidedropdown,
+          { mozSystemGroup: true }
+        );
+
+        if (aIsDropDown) {
+          aElement.openInParentProcess = false;
+        }
+        // OK: result
+        // Cancel: !result
+        if (!result || result.choices === undefined) {
+          return;
+        }
+
+        const [, map, id] = this._generateSelectItems(aElement);
+        let dispatchEvents = false;
+        if (!aElement.multiple) {
+          const elem = map[result.choices[0]];
+          if (elem && win.HTMLOptionElement.isInstance(elem)) {
+            dispatchEvents = !elem.selected;
+            elem.selected = true;
+          } else {
+            console.error("Invalid id for select result: " + result.choices[0]);
+          }
+        } else {
+          for (let i = 0; i < id; i++) {
+            const elem = map[i];
+            const index = result.choices.indexOf(String(i));
+            if (
+              win.HTMLOptionElement.isInstance(elem) &&
+              elem.selected !== index >= 0
+            ) {
+              // Current selected is not the same as the new selected state.
+              dispatchEvents = true;
+              elem.selected = !elem.selected;
+            }
+            result.choices[index] = undefined;
+          }
+          for (let i = 0; i < result.choices.length; i++) {
+            if (result.choices[i] !== undefined && result.choices[i] !== null) {
+              console.error(
+                "Invalid id for select result: " + result.choices[i]
+              );
+              break;
+            }
+          }
+        }
+
+        if (dispatchEvents) {
+          this._dispatchEvents(aElement);
+        }
+      }
+    );
+  }
+
+  _handleDateTime(aElement) {
+    const win = aElement.ownerGlobal;
+    const prompt = new lazy.GeckoViewPrompter(win);
+
+    const chromeEventHandler = aElement.ownerGlobal.docShell.chromeEventHandler;
+    const dismissPrompt = () => prompt.dismiss();
+    // Some controls don't have UA widget (bug 888320)
+    {
+      const dateTimeBoxElement = aElement.dateTimeBoxElement;
+      if (["month", "week"].includes(aElement.type) && !dateTimeBoxElement) {
+        aElement.addEventListener("blur", dismissPrompt, {
+          mozSystemGroup: true,
+        });
+      } else {
+        chromeEventHandler.addEventListener(
+          "MozCloseDateTimePicker",
+          dismissPrompt
+        );
+
+        dateTimeBoxElement.dispatchEvent(
+          new win.CustomEvent("MozSetDateTimePickerState", { detail: true })
+        );
+      }
+    }
+
+    prompt.asyncShowPrompt(
+      {
+        type: "datetime",
+        mode: aElement.type,
+        value: aElement.value,
+        min: aElement.min,
+        max: aElement.max,
+        step: aElement.step,
+      },
+      result => {
+        // Some controls don't have UA widget (bug 888320)
+        const dateTimeBoxElement = aElement.dateTimeBoxElement;
+        if (["month", "week"].includes(aElement.type) && !dateTimeBoxElement) {
+          aElement.removeEventListener("blur", dismissPrompt, {
+            mozSystemGroup: true,
+          });
+        } else {
+          chromeEventHandler.removeEventListener(
+            "MozCloseDateTimePicker",
+            dismissPrompt
+          );
+          dateTimeBoxElement.dispatchEvent(
+            new win.CustomEvent("MozSetDateTimePickerState", { detail: false })
+          );
+        }
+
+        // OK: result
+        // Cancel: !result
+        if (
+          !result ||
+          result.datetime === undefined ||
+          result.datetime === aElement.value
+        ) {
+          return;
+        }
+        aElement.value = result.datetime;
+        this._dispatchEvents(aElement);
+      }
+    );
+  }
+
+  _dispatchEvents(aElement) {
+    // Fire both "input" and "change" events for <select> and <input> for
+    // date/time.
+    aElement.dispatchEvent(
+      new aElement.ownerGlobal.Event("input", { bubbles: true, composed: true })
+    );
+    aElement.dispatchEvent(
+      new aElement.ownerGlobal.Event("change", { bubbles: true })
+    );
+  }
+
+  _handlePopupBlocked(aEvent) {
+    const dwi = aEvent.requestingWindow;
+    const popupWindowURISpec = aEvent.popupWindowURI
+      ? aEvent.popupWindowURI.displaySpec
+      : "about:blank";
+
+    const prompt = new lazy.GeckoViewPrompter(aEvent.requestingWindow);
+    prompt.asyncShowPrompt(
+      {
+        type: "popup",
+        targetUri: popupWindowURISpec,
+      },
+      ({ response }) => {
+        if (response && dwi) {
+          dwi.open(
+            popupWindowURISpec,
+            aEvent.popupWindowName,
+            aEvent.popupWindowFeatures
+          );
+        }
+      }
+    );
+  }
+
+  /* ----------  nsIPromptFactory  ---------- */
+  getPrompt(aDOMWin, aIID) {
+    // Delegated to login manager here, which in turn calls back into us via nsIPromptService.
+    if (aIID.equals(Ci.nsIAuthPrompt2) || aIID.equals(Ci.nsIAuthPrompt)) {
+      try {
+        const pwmgr = Cc[
+          "@mozilla.org/passwordmanager/authpromptfactory;1"
+        ].getService(Ci.nsIPromptFactory);
+        return pwmgr.getPrompt(aDOMWin, aIID);
+      } catch (e) {
+        console.error("Delegation to password manager failed: " + e);
+      }
+    }
+
+    const p = new PromptDelegate(aDOMWin);
+    p.QueryInterface(aIID);
+    return p;
+  }
+
+  /* ----------  private memebers  ---------- */
+
+  // nsIPromptService methods proxy to our Prompt class
+  callProxy(aMethod, aArguments) {
+    const prompt = new PromptDelegate(aArguments[0]);
+    let promptArgs;
+    if (BrowsingContext.isInstance(aArguments[0])) {
+      // Called by BrowsingContext prompt method, strip modalType.
+      [, , /*browsingContext*/ /*modalType*/ ...promptArgs] = aArguments;
+    } else {
+      [, /*domWindow*/ ...promptArgs] = aArguments;
+    }
+    return prompt[aMethod].apply(prompt, promptArgs);
+  }
+
+  /* ----------  nsIPromptService  ---------- */
+
+  alert() {
+    return this.callProxy("alert", arguments);
+  }
+  alertBC() {
+    return this.callProxy("alert", arguments);
+  }
+  alertCheck() {
+    return this.callProxy("alertCheck", arguments);
+  }
+  alertCheckBC() {
+    return this.callProxy("alertCheck", arguments);
+  }
+  confirm() {
+    return this.callProxy("confirm", arguments);
+  }
+  confirmBC() {
+    return this.callProxy("confirm", arguments);
+  }
+  confirmCheck() {
+    return this.callProxy("confirmCheck", arguments);
+  }
+  confirmCheckBC() {
+    return this.callProxy("confirmCheck", arguments);
+  }
+  confirmEx() {
+    return this.callProxy("confirmEx", arguments);
+  }
+  confirmExBC() {
+    return this.callProxy("confirmEx", arguments);
+  }
+  prompt() {
+    return this.callProxy("prompt", arguments);
+  }
+  promptBC() {
+    return this.callProxy("prompt", arguments);
+  }
+  promptUsernameAndPassword() {
+    return this.callProxy("promptUsernameAndPassword", arguments);
+  }
+  promptUsernameAndPasswordBC() {
+    return this.callProxy("promptUsernameAndPassword", arguments);
+  }
+  promptPassword() {
+    return this.callProxy("promptPassword", arguments);
+  }
+  promptPasswordBC() {
+    return this.callProxy("promptPassword", arguments);
+  }
+  select() {
+    return this.callProxy("select", arguments);
+  }
+  selectBC() {
+    return this.callProxy("select", arguments);
+  }
+  promptAuth() {
+    return this.callProxy("promptAuth", arguments);
+  }
+  promptAuthBC() {
+    return this.callProxy("promptAuth", arguments);
+  }
+  asyncPromptAuth() {
+    return this.callProxy("asyncPromptAuth", arguments);
+  }
+}
+
+PromptFactory.prototype.classID = Components.ID(
+  "{076ac188-23c1-4390-aa08-7ef1f78ca5d9}"
+);
+PromptFactory.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIPromptFactory",
+  "nsIPromptService",
+]);
+
+class PromptDelegate {
+  constructor(aParent) {
+    this._prompter = new lazy.GeckoViewPrompter(aParent);
+  }
+
+  BUTTON_TYPE_POSITIVE = 0;
+  BUTTON_TYPE_NEUTRAL = 1;
+  BUTTON_TYPE_NEGATIVE = 2;
+
+  /* ---------- internal methods ---------- */
+
+  _addText(aTitle, aText, aMsg) {
+    return Object.assign(aMsg, {
+      title: aTitle,
+      msg: aText,
+    });
+  }
+
+  _addCheck(aCheckMsg, aCheckState, aMsg) {
+    return Object.assign(aMsg, {
+      hasCheck: !!aCheckMsg,
+      checkMsg: aCheckMsg,
+      checkValue: aCheckState && aCheckState.value,
+    });
+  }
+
+  /* ----------  nsIPrompt  ---------- */
+
+  alert(aTitle, aText) {
+    this.alertCheck(aTitle, aText);
+  }
+
+  alertCheck(aTitle, aText, aCheckMsg, aCheckState) {
+    const result = this._prompter.showPrompt(
+      this._addText(
+        aTitle,
+        aText,
+        this._addCheck(aCheckMsg, aCheckState, {
+          type: "alert",
+        })
+      )
+    );
+    if (result && aCheckState) {
+      aCheckState.value = !!result.checkValue;
+    }
+  }
+
+  confirm(aTitle, aText) {
+    // Button 0 is OK.
+    return this.confirmCheck(aTitle, aText);
+  }
+
+  confirmCheck(aTitle, aText, aCheckMsg, aCheckState) {
+    // Button 0 is OK.
+    return (
+      this.confirmEx(
+        aTitle,
+        aText,
+        Ci.nsIPrompt.STD_OK_CANCEL_BUTTONS,
+        /* aButton0 */ null,
+        /* aButton1 */ null,
+        /* aButton2 */ null,
+        aCheckMsg,
+        aCheckState
+      ) == 0
+    );
+  }
+
+  confirmEx(
+    aTitle,
+    aText,
+    aButtonFlags,
+    aButton0,
+    aButton1,
+    aButton2,
+    aCheckMsg,
+    aCheckState
+  ) {
+    const btnMap = Array(3).fill(null);
+    const btnTitle = Array(3).fill(null);
+    const btnCustomTitle = Array(3).fill(null);
+    const savedButtonId = [];
+    for (let i = 0; i < 3; i++) {
+      const btnFlags = aButtonFlags >> (i * 8);
+      switch (btnFlags & 0xff) {
+        case Ci.nsIPrompt.BUTTON_TITLE_OK:
+          btnMap[this.BUTTON_TYPE_POSITIVE] = i;
+          btnTitle[this.BUTTON_TYPE_POSITIVE] = "ok";
+          break;
+        case Ci.nsIPrompt.BUTTON_TITLE_CANCEL:
+          btnMap[this.BUTTON_TYPE_NEGATIVE] = i;
+          btnTitle[this.BUTTON_TYPE_NEGATIVE] = "cancel";
+          break;
+        case Ci.nsIPrompt.BUTTON_TITLE_YES:
+          btnMap[this.BUTTON_TYPE_POSITIVE] = i;
+          btnTitle[this.BUTTON_TYPE_POSITIVE] = "yes";
+          break;
+        case Ci.nsIPrompt.BUTTON_TITLE_NO:
+          btnMap[this.BUTTON_TYPE_NEGATIVE] = i;
+          btnTitle[this.BUTTON_TYPE_NEGATIVE] = "no";
+          break;
+        case Ci.nsIPrompt.BUTTON_TITLE_IS_STRING:
+          // We don't know if this is positive/negative/neutral, so save for later.
+          savedButtonId.push(i);
+          break;
+        case Ci.nsIPrompt.BUTTON_TITLE_SAVE:
+        case Ci.nsIPrompt.BUTTON_TITLE_DONT_SAVE:
+        case Ci.nsIPrompt.BUTTON_TITLE_REVERT:
+        // Not supported; fall-through.
+        default:
+          break;
+      }
+    }
+
+    // Put saved buttons into available slots.
+    for (let i = 0; i < 3 && savedButtonId.length; i++) {
+      if (btnMap[i] === null) {
+        btnMap[i] = savedButtonId.shift();
+        btnTitle[i] = "custom";
+        btnCustomTitle[i] = [aButton0, aButton1, aButton2][btnMap[i]];
+      }
+    }
+
+    const result = this._prompter.showPrompt(
+      this._addText(
+        aTitle,
+        aText,
+        this._addCheck(aCheckMsg, aCheckState, {
+          type: "button",
+          btnTitle,
+          btnCustomTitle,
+        })
+      )
+    );
+    if (result && aCheckState) {
+      aCheckState.value = !!result.checkValue;
+    }
+    return result && result.button in btnMap ? btnMap[result.button] : -1;
+  }
+
+  prompt(aTitle, aText, aValue, aCheckMsg, aCheckState) {
+    const result = this._prompter.showPrompt(
+      this._addText(
+        aTitle,
+        aText,
+        this._addCheck(aCheckMsg, aCheckState, {
+          type: "text",
+          value: aValue.value,
+        })
+      )
+    );
+    // OK: result && result.text !== undefined
+    // Cancel: result && result.text === undefined
+    // Error: !result
+    if (result && aCheckState) {
+      aCheckState.value = !!result.checkValue;
+    }
+    if (!result || result.text === undefined) {
+      return false;
+    }
+    aValue.value = result.text || "";
+    return true;
+  }
+
+  promptPassword(aTitle, aText, aPassword) {
+    return this._promptUsernameAndPassword(
+      aTitle,
+      aText,
+      /* aUsername */ undefined,
+      aPassword
+    );
+  }
+
+  promptUsernameAndPassword(aTitle, aText, aUsername, aPassword) {
+    const msg = {
+      type: "auth",
+      mode: aUsername ? "auth" : "password",
+      options: {
+        flags: aUsername ? 0 : Ci.nsIAuthInformation.ONLY_PASSWORD,
+        username: aUsername ? aUsername.value : undefined,
+        password: aPassword.value,
+      },
+    };
+    const result = this._prompter.showPrompt(this._addText(aTitle, aText, msg));
+    // OK: result && result.password !== undefined
+    // Cancel: result && result.password === undefined
+    // Error: !result
+    if (!result || result.password === undefined) {
+      return false;
+    }
+    if (aUsername) {
+      aUsername.value = result.username || "";
+    }
+    aPassword.value = result.password || "";
+    return true;
+  }
+
+  select(aTitle, aText, aSelectList, aOutSelection) {
+    const choices = Array.prototype.map.call(aSelectList, (item, index) => ({
+      id: String(index),
+      label: item,
+      disabled: false,
+      selected: false,
+    }));
+    const result = this._prompter.showPrompt(
+      this._addText(aTitle, aText, {
+        type: "choice",
+        mode: "single",
+        choices,
+      })
+    );
+    // OK: result
+    // Cancel: !result
+    if (!result || result.choices === undefined) {
+      return false;
+    }
+    aOutSelection.value = Number(result.choices[0]);
+    return true;
+  }
+
+  _getAuthMsg(aChannel, aLevel, aAuthInfo) {
+    let username;
+    if (
+      aAuthInfo.flags & Ci.nsIAuthInformation.NEED_DOMAIN &&
+      aAuthInfo.domain
+    ) {
+      username = aAuthInfo.domain + "\\" + aAuthInfo.username;
+    } else {
+      username = aAuthInfo.username;
+    }
+    return this._addText(
+      /* title */ null,
+      this._getAuthText(aChannel, aAuthInfo),
+      {
+        type: "auth",
+        mode:
+          aAuthInfo.flags & Ci.nsIAuthInformation.ONLY_PASSWORD
+            ? "password"
+            : "auth",
+        options: {
+          flags: aAuthInfo.flags,
+          uri: aChannel && aChannel.URI.displaySpec,
+          level: aLevel,
+          username,
+          password: aAuthInfo.password,
+        },
+      }
+    );
+  }
+
+  _fillAuthInfo(aAuthInfo, aResult) {
+    if (!aResult || aResult.password === undefined) {
+      return false;
+    }
+
+    aAuthInfo.password = aResult.password || "";
+    if (aAuthInfo.flags & Ci.nsIAuthInformation.ONLY_PASSWORD) {
+      return true;
+    }
+
+    const username = aResult.username || "";
+    if (aAuthInfo.flags & Ci.nsIAuthInformation.NEED_DOMAIN) {
+      // Domain is separated from username by a backslash
+      var idx = username.indexOf("\\");
+      if (idx >= 0) {
+        aAuthInfo.domain = username.substring(0, idx);
+        aAuthInfo.username = username.substring(idx + 1);
+        return true;
+      }
+    }
+    aAuthInfo.username = username;
+    return true;
+  }
+
+  promptAuth(aChannel, aLevel, aAuthInfo) {
+    const result = this._prompter.showPrompt(
+      this._getAuthMsg(aChannel, aLevel, aAuthInfo)
+    );
+    // OK: result && result.password !== undefined
+    // Cancel: result && result.password === undefined
+    // Error: !result
+    return this._fillAuthInfo(aAuthInfo, result);
+  }
+
+  async asyncPromptAuth(aChannel, aLevel, aAuthInfo) {
+    const result = await this._prompter.asyncShowPromptPromise(
+      this._getAuthMsg(aChannel, aLevel, aAuthInfo)
+    );
+    // OK: result && result.password !== undefined
+    // Cancel: result && result.password === undefined
+    // Error: !result
+    return this._fillAuthInfo(aAuthInfo, result);
+  }
+
+  _getAuthText(aChannel, aAuthInfo) {
+    const isProxy = aAuthInfo.flags & Ci.nsIAuthInformation.AUTH_PROXY;
+    const isPassOnly = aAuthInfo.flags & Ci.nsIAuthInformation.ONLY_PASSWORD;
+    const isCrossOrig =
+      aAuthInfo.flags & Ci.nsIAuthInformation.CROSS_ORIGIN_SUB_RESOURCE;
+
+    const username = aAuthInfo.username;
+    const authTarget = this._getAuthTarget(aChannel, aAuthInfo);
+    const { displayHost } = authTarget;
+    let { realm } = authTarget;
+
+    // Suppress "the site says: $realm" when we synthesized a missing realm.
+    if (!aAuthInfo.realm && !isProxy) {
+      realm = "";
+    }
+
+    // Trim obnoxiously long realms.
+    if (realm.length > 50) {
+      realm = realm.substring(0, 50) + "\u2026";
+    }
+
+    const bundle = Services.strings.createBundle(
+      "chrome://global/locale/commonDialogs.properties"
+    );
+    let text;
+    if (isProxy) {
+      text = bundle.formatStringFromName("EnterLoginForProxy3", [
+        realm,
+        displayHost,
+      ]);
+    } else if (isPassOnly) {
+      text = bundle.formatStringFromName("EnterPasswordFor", [
+        username,
+        displayHost,
+      ]);
+    } else if (isCrossOrig) {
+      text = bundle.formatStringFromName("EnterUserPasswordForCrossOrigin2", [
+        displayHost,
+      ]);
+    } else if (!realm) {
+      text = bundle.formatStringFromName("EnterUserPasswordFor2", [
+        displayHost,
+      ]);
+    } else {
+      text = bundle.formatStringFromName("EnterLoginForRealm3", [
+        realm,
+        displayHost,
+      ]);
+    }
+
+    return text;
+  }
+
+  _getAuthTarget(aChannel, aAuthInfo) {
+    // If our proxy is demanding authentication, don't use the
+    // channel's actual destination.
+    if (aAuthInfo.flags & Ci.nsIAuthInformation.AUTH_PROXY) {
+      if (!(aChannel instanceof Ci.nsIProxiedChannel)) {
+        throw new Error("proxy auth needs nsIProxiedChannel");
+      }
+      const info = aChannel.proxyInfo;
+      if (!info) {
+        throw new Error("proxy auth needs nsIProxyInfo");
+      }
+      // Proxies don't have a scheme, but we'll use "moz-proxy://"
+      // so that it's more obvious what the login is for.
+      const idnService = Cc["@mozilla.org/network/idn-service;1"].getService(
+        Ci.nsIIDNService
+      );
+      const displayHost =
+        "moz-proxy://" +
+        idnService.convertUTF8toACE(info.host) +
+        ":" +
+        info.port;
+      let realm = aAuthInfo.realm;
+      if (!realm) {
+        realm = displayHost;
+      }
+      return { displayHost, realm };
+    }
+
+    const displayHost =
+      aChannel.URI.scheme + "://" + aChannel.URI.displayHostPort;
+    // If a HTTP WWW-Authenticate header specified a realm, that value
+    // will be available here. If it wasn't set or wasn't HTTP, we'll use
+    // the formatted hostname instead.
+    let realm = aAuthInfo.realm;
+    if (!realm) {
+      realm = displayHost;
+    }
+    return { displayHost, realm };
+  }
+}
+
+PromptDelegate.prototype.QueryInterface = ChromeUtils.generateQI(["nsIPrompt"]);
diff --git a/mobile/android/components/geckoview/GeckoViewPrompter.sys.mjs b/mobile/android/components/geckoview/GeckoViewPrompter.sys.mjs
new file mode 100644
index 0000000000..a36ae0abec
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewPrompter.sys.mjs
@@ -0,0 +1,206 @@
+/* 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/. */
+
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewPrompter");
+
+export class GeckoViewPrompter {
+  constructor(aParent) {
+    this.id = Services.uuid.generateUUID().toString().slice(1, -1); // Discard surrounding braces
+
+    if (aParent) {
+      if (Window.isInstance(aParent)) {
+        this._domWin = aParent;
+      } else if (aParent.window) {
+        this._domWin = aParent.window;
+      } else {
+        this._domWin =
+          aParent.embedderElement && aParent.embedderElement.ownerGlobal;
+      }
+    }
+
+    if (!this._domWin) {
+      this._domWin = Services.wm.getMostRecentWindow("navigator:geckoview");
+    }
+
+    this._innerWindowId =
+      this._domWin?.browsingContext.currentWindowContext.innerWindowId;
+  }
+
+  get domWin() {
+    return this._domWin;
+  }
+
+  get prompterActor() {
+    const actor = this.domWin?.windowGlobalChild.getActor("GeckoViewPrompter");
+    return actor;
+  }
+
+  _changeModalState(aEntering) {
+    if (!this._domWin) {
+      // Allow not having a DOM window.
+      return true;
+    }
+    // Accessing the document object can throw if this window no longer exists. See bug 789888.
+    try {
+      const winUtils = this._domWin.windowUtils;
+      if (!aEntering) {
+        winUtils.leaveModalState();
+      }
+
+      const event = this._domWin.document.createEvent("Events");
+      event.initEvent(
+        aEntering ? "DOMWillOpenModalDialog" : "DOMModalDialogClosed",
+        true,
+        true
+      );
+      winUtils.dispatchEventToChromeOnly(this._domWin, event);
+
+      if (aEntering) {
+        winUtils.enterModalState();
+      }
+      return true;
+    } catch (ex) {
+      console.error("Failed to change modal state: " + ex);
+    }
+    return false;
+  }
+
+  _dismissUi() {
+    this.prompterActor?.dismissPrompt(this);
+  }
+
+  accept(aInputText = this.inputText) {
+    if (this.callback) {
+      let acceptMsg = {};
+      switch (this.message.type) {
+        case "alert":
+          acceptMsg = null;
+          break;
+        case "button":
+          acceptMsg.button = 0;
+          break;
+        case "text":
+          acceptMsg.text = aInputText;
+          break;
+        default:
+          acceptMsg = null;
+          break;
+      }
+      this.callback(acceptMsg);
+      // Notify the UI that this prompt should be hidden.
+      this._dismissUi();
+    }
+  }
+
+  dismiss() {
+    this.callback(null);
+    // Notify the UI that this prompt should be hidden.
+    this._dismissUi();
+  }
+
+  getPromptType() {
+    switch (this.message.type) {
+      case "alert":
+        return this.message.checkValue ? "alertCheck" : "alert";
+      case "button":
+        return this.message.checkValue ? "confirmCheck" : "confirm";
+      case "text":
+        return this.message.checkValue ? "promptCheck" : "prompt";
+      default:
+        return this.message.type;
+    }
+  }
+
+  getPromptText() {
+    return this.message.msg;
+  }
+
+  getInputText() {
+    return this.inputText;
+  }
+
+  setInputText(aInput) {
+    this.inputText = aInput;
+  }
+
+  /**
+   * Shows a native prompt, and then spins the event loop for this thread while we wait
+   * for a response
+   */
+  showPrompt(aMsg) {
+    let result = undefined;
+    if (!this._domWin || !this._changeModalState(/* aEntering */ true)) {
+      return result;
+    }
+    try {
+      this.asyncShowPrompt(aMsg, res => (result = res));
+
+      // Spin this thread while we wait for a result
+      Services.tm.spinEventLoopUntil(
+        "GeckoViewPrompter.jsm:showPrompt",
+        () => this._domWin.closed || result !== undefined
+      );
+    } finally {
+      this._changeModalState(/* aEntering */ false);
+    }
+    return result;
+  }
+
+  checkInnerWindow() {
+    // Checks that the innerWindow where this prompt was created still matches
+    // the current innerWindow.
+    // This checks will fail if the page navigates away, making this prompt
+    // obsolete.
+    return (
+      this._innerWindowId ===
+      this._domWin.browsingContext.currentWindowContext.innerWindowId
+    );
+  }
+
+  asyncShowPromptPromise(aMsg) {
+    return new Promise(resolve => {
+      this.asyncShowPrompt(aMsg, resolve);
+    });
+  }
+
+  async asyncShowPrompt(aMsg, aCallback) {
+    this.message = aMsg;
+    this.inputText = aMsg.value;
+    this.callback = aCallback;
+
+    aMsg.id = this.id;
+
+    let response = null;
+    try {
+      if (this.checkInnerWindow()) {
+        response = await this.prompterActor.prompt(this, aMsg);
+      }
+    } catch (error) {
+      // Nothing we can do really, we will treat this as a dismiss.
+      warn`Error while prompting: ${error}`;
+    }
+
+    if (!this.checkInnerWindow()) {
+      // Page has navigated away, let's dismiss the prompt
+      aCallback(null);
+    } else {
+      aCallback(response);
+    }
+    // This callback object is tied to the Java garbage collector because
+    // it is invoked from Java. Manually release the target callback
+    // here; otherwise we may hold onto resources for too long, because
+    // we would be relying on both the Java and the JS garbage collectors
+    // to run.
+    aMsg = undefined;
+    aCallback = undefined;
+  }
+
+  update(aMsg) {
+    this.message = aMsg;
+    aMsg.id = this.id;
+    this.prompterActor?.updatePrompt(aMsg);
+  }
+}
diff --git a/mobile/android/components/geckoview/GeckoViewPush.jsm b/mobile/android/components/geckoview/GeckoViewPush.jsm
new file mode 100644
index 0000000000..5899bfd3d8
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewPush.jsm
@@ -0,0 +1,257 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["PushService"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewPush");
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  EventDispatcher: "resource://gre/modules/Messaging.sys.mjs",
+});
+
+// Observer notification topics for push messages and subscription status
+// changes. These are duplicated and used in `nsIPushNotifier`. They're exposed
+// on `nsIPushService` so that JS callers only need to import this service.
+const OBSERVER_TOPIC_PUSH = "push-message";
+const OBSERVER_TOPIC_SUBSCRIPTION_CHANGE = "push-subscription-change";
+const OBSERVER_TOPIC_SUBSCRIPTION_MODIFIED = "push-subscription-modified";
+
+function createSubscription({
+  scope,
+  principal,
+  browserPublicKey,
+  authSecret,
+  endpoint,
+  appServerKey,
+}) {
+  const decodedBrowserKey = ChromeUtils.base64URLDecode(browserPublicKey, {
+    padding: "ignore",
+  });
+  const decodedAuthSecret = ChromeUtils.base64URLDecode(authSecret, {
+    padding: "ignore",
+  });
+
+  return new PushSubscription({
+    endpoint,
+    scope,
+    p256dhKey: decodedBrowserKey,
+    authenticationSecret: decodedAuthSecret,
+    appServerKey,
+  });
+}
+
+function scopeWithAttrs(scope, attrs) {
+  return scope + ChromeUtils.originAttributesToSuffix(attrs);
+}
+
+class PushService {
+  constructor() {
+    this.wrappedJSObject = this;
+  }
+
+  pushTopic = OBSERVER_TOPIC_PUSH;
+  subscriptionChangeTopic = OBSERVER_TOPIC_SUBSCRIPTION_CHANGE;
+  subscriptionModifiedTopic = OBSERVER_TOPIC_SUBSCRIPTION_MODIFIED;
+
+  // nsIObserver methods
+
+  observe(subject, topic, data) {}
+
+  // nsIPushService methods
+
+  subscribe(scope, principal, callback) {
+    this.subscribeWithKey(scope, principal, null, callback);
+  }
+
+  async subscribeWithKey(scope, principal, appServerKey, callback) {
+    try {
+      const response = await lazy.EventDispatcher.instance.sendRequestForResult(
+        {
+          type: "GeckoView:PushSubscribe",
+          scope: scopeWithAttrs(scope, principal.originAttributes),
+          appServerKey: appServerKey
+            ? ChromeUtils.base64URLEncode(new Uint8Array(appServerKey), {
+                pad: true,
+              })
+            : null,
+        }
+      );
+
+      let subscription = null;
+      if (response) {
+        subscription = createSubscription({
+          ...response,
+          scope,
+          principal,
+          appServerKey,
+        });
+      }
+
+      callback.onPushSubscription(Cr.NS_OK, subscription);
+    } catch (e) {
+      callback.onPushSubscription(Cr.NS_ERROR_FAILURE, null);
+    }
+  }
+
+  async unsubscribe(scope, principal, callback) {
+    try {
+      await lazy.EventDispatcher.instance.sendRequestForResult({
+        type: "GeckoView:PushUnsubscribe",
+        scope: scopeWithAttrs(scope, principal.originAttributes),
+      });
+
+      callback.onUnsubscribe(Cr.NS_OK, true);
+    } catch (e) {
+      callback.onUnsubscribe(Cr.NS_ERROR_FAILURE, false);
+    }
+  }
+
+  async getSubscription(scope, principal, callback) {
+    try {
+      const response = await lazy.EventDispatcher.instance.sendRequestForResult(
+        {
+          type: "GeckoView:PushGetSubscription",
+          scope: scopeWithAttrs(scope, principal.originAttributes),
+        }
+      );
+
+      let subscription = null;
+      if (response) {
+        subscription = createSubscription({
+          ...response,
+          scope,
+          principal,
+        });
+      }
+
+      callback.onPushSubscription(Cr.NS_OK, subscription);
+    } catch (e) {
+      callback.onPushSubscription(Cr.NS_ERROR_FAILURE, null);
+    }
+  }
+
+  clearForDomain(domain, callback) {
+    callback.onClear(Cr.NS_OK);
+  }
+
+  // nsIPushQuotaManager methods
+
+  notificationForOriginShown(origin) {}
+
+  notificationForOriginClosed(origin) {}
+
+  // nsIPushErrorReporter methods
+
+  reportDeliveryError(messageId, reason) {}
+}
+
+PushService.prototype.classID = Components.ID(
+  "{a54d84d7-98a4-4fec-b664-e42e512ae9cc}"
+);
+PushService.prototype.contractID = "@mozilla.org/push/Service;1";
+PushService.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIObserver",
+  "nsISupportsWeakReference",
+  "nsIPushService",
+  "nsIPushQuotaManager",
+  "nsIPushErrorReporter",
+]);
+
+/** `PushSubscription` instances are passed to all subscription callbacks. */
+class PushSubscription {
+  constructor(props) {
+    this._props = props;
+  }
+
+  /** The URL for sending messages to this subscription. */
+  get endpoint() {
+    return this._props.endpoint;
+  }
+
+  /** The last time a message was sent to this subscription. */
+  get lastPush() {
+    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
+  }
+
+  /** The total number of messages sent to this subscription. */
+  get pushCount() {
+    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
+  }
+
+  /**
+   * The app will take care of throttling, so we don't
+   * care about the quota stuff here.
+   */
+  get quota() {
+    return -1;
+  }
+
+  /**
+   * Indicates whether this subscription was created with the system principal.
+   * System subscriptions are exempt from the background message quota and
+   * permission checks.
+   */
+  get isSystemSubscription() {
+    return false;
+  }
+
+  /** The private key used to decrypt incoming push messages, in JWK format */
+  get p256dhPrivateKey() {
+    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
+  }
+
+  /**
+   * Indicates whether this subscription is subject to the background message
+   * quota.
+   */
+  quotaApplies() {
+    return false;
+  }
+
+  /**
+   * Indicates whether this subscription exceeded the background message quota,
+   * or the user revoked the notification permission. The caller must request a
+   * new subscription to continue receiving push messages.
+   */
+  isExpired() {
+    return false;
+  }
+
+  /**
+   * Returns a key for encrypting messages sent to this subscription. JS
+   * callers receive the key buffer as a return value, while C++ callers
+   * receive the key size and buffer as out parameters.
+   */
+  getKey(name) {
+    switch (name) {
+      case "p256dh":
+        return this._getRawKey(this._props.p256dhKey);
+
+      case "auth":
+        return this._getRawKey(this._props.authenticationSecret);
+
+      case "appServer":
+        return this._getRawKey(this._props.appServerKey);
+    }
+    return [];
+  }
+
+  _getRawKey(key) {
+    if (!key) {
+      return [];
+    }
+    return new Uint8Array(key);
+  }
+}
+
+PushSubscription.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIPushSubscription",
+]);
diff --git a/mobile/android/components/geckoview/GeckoViewStartup.jsm b/mobile/android/components/geckoview/GeckoViewStartup.jsm
new file mode 100644
index 0000000000..07924b6e07
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewStartup.jsm
@@ -0,0 +1,344 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["GeckoViewStartup"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  ActorManagerParent: "resource://gre/modules/ActorManagerParent.sys.mjs",
+  EventDispatcher: "resource://gre/modules/Messaging.sys.mjs",
+  PdfJs: "resource://pdf.js/PdfJs.sys.mjs",
+  Preferences: "resource://gre/modules/Preferences.sys.mjs",
+});
+
+const { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+
+const { debug, warn } = GeckoViewUtils.initLogging("Startup");
+
+var { DelayedInit } = ChromeUtils.import(
+  "resource://gre/modules/DelayedInit.jsm"
+);
+
+function InitLater(fn, object, name) {
+  return DelayedInit.schedule(fn, object, name, 15000 /* 15s max wait */);
+}
+
+const JSPROCESSACTORS = {
+  GeckoViewPermissionProcess: {
+    parent: {
+      esModuleURI:
+        "resource:///actors/GeckoViewPermissionProcessParent.sys.mjs",
+    },
+    child: {
+      esModuleURI: "resource:///actors/GeckoViewPermissionProcessChild.sys.mjs",
+      observers: [
+        "getUserMedia:ask-device-permission",
+        "getUserMedia:request",
+        "recording-device-events",
+        "PeerConnection:request",
+      ],
+    },
+  },
+};
+
+const JSWINDOWACTORS = {
+  LoadURIDelegate: {
+    parent: {
+      esModuleURI: "resource:///actors/LoadURIDelegateParent.sys.mjs",
+    },
+    child: {
+      esModuleURI: "resource:///actors/LoadURIDelegateChild.sys.mjs",
+    },
+    messageManagerGroups: ["browsers"],
+  },
+  GeckoViewPermission: {
+    parent: {
+      esModuleURI: "resource:///actors/GeckoViewPermissionParent.sys.mjs",
+    },
+    child: {
+      esModuleURI: "resource:///actors/GeckoViewPermissionChild.sys.mjs",
+    },
+    allFrames: true,
+    includeChrome: true,
+  },
+  GeckoViewPrompt: {
+    child: {
+      esModuleURI: "resource:///actors/GeckoViewPromptChild.sys.mjs",
+      events: {
+        click: { capture: false, mozSystemGroup: true },
+        contextmenu: { capture: false, mozSystemGroup: true },
+        mozshowdropdown: {},
+        "mozshowdropdown-sourcetouch": {},
+        MozOpenDateTimePicker: {},
+        DOMPopupBlocked: { capture: false, mozSystemGroup: true },
+      },
+    },
+    allFrames: true,
+    messageManagerGroups: ["browsers"],
+  },
+  GeckoViewFormValidation: {
+    child: {
+      esModuleURI: "resource:///actors/GeckoViewFormValidationChild.sys.mjs",
+      events: {
+        MozInvalidForm: {},
+      },
+    },
+    allFrames: true,
+    messageManagerGroups: ["browsers"],
+  },
+  GeckoViewClipboardPermission: {
+    parent: {
+      esModuleURI:
+        "resource:///actors/GeckoViewClipboardPermissionParent.sys.mjs",
+    },
+    child: {
+      esModuleURI:
+        "resource:///actors/GeckoViewClipboardPermissionChild.sys.mjs",
+      events: {
+        MozClipboardReadPaste: {},
+        deactivate: { mozSystemGroup: true },
+        mousedown: { capture: true, mozSystemGroup: true },
+        mozvisualscroll: { mozSystemGroup: true },
+        pagehide: { capture: true, mozSystemGroup: true },
+      },
+    },
+    allFrames: true,
+  },
+  GeckoViewPdfjs: {
+    parent: {
+      esModuleURI: "resource://pdf.js/GeckoViewPdfjsParent.sys.mjs",
+    },
+    child: {
+      esModuleURI: "resource://pdf.js/GeckoViewPdfjsChild.sys.mjs",
+    },
+    allFrames: true,
+  },
+};
+
+class GeckoViewStartup {
+  /* ----------  nsIObserver  ---------- */
+  observe(aSubject, aTopic, aData) {
+    debug`observe: ${aTopic}`;
+    switch (aTopic) {
+      case "content-process-ready-for-script":
+      case "app-startup": {
+        GeckoViewUtils.addLazyGetter(this, "GeckoViewConsole", {
+          module: "resource://gre/modules/GeckoViewConsole.sys.mjs",
+        });
+
+        GeckoViewUtils.addLazyGetter(this, "GeckoViewStorageController", {
+          module: "resource://gre/modules/GeckoViewStorageController.sys.mjs",
+          ged: [
+            "GeckoView:ClearData",
+            "GeckoView:ClearSessionContextData",
+            "GeckoView:ClearHostData",
+            "GeckoView:ClearBaseDomainData",
+            "GeckoView:GetAllPermissions",
+            "GeckoView:GetPermissionsByURI",
+            "GeckoView:SetPermission",
+            "GeckoView:SetPermissionByURI",
+            "GeckoView:GetCookieBannerModeForDomain",
+            "GeckoView:SetCookieBannerModeForDomain",
+            "GeckoView:RemoveCookieBannerModeForDomain",
+          ],
+        });
+
+        GeckoViewUtils.addLazyGetter(this, "GeckoViewPushController", {
+          module: "resource://gre/modules/GeckoViewPushController.sys.mjs",
+          ged: ["GeckoView:PushEvent", "GeckoView:PushSubscriptionChanged"],
+        });
+
+        GeckoViewUtils.addLazyPrefObserver(
+          {
+            name: "geckoview.console.enabled",
+            default: false,
+          },
+          {
+            handler: _ => this.GeckoViewConsole,
+          }
+        );
+
+        // Parent process only
+        if (
+          Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_DEFAULT
+        ) {
+          lazy.ActorManagerParent.addJSWindowActors(JSWINDOWACTORS);
+          lazy.ActorManagerParent.addJSProcessActors(JSPROCESSACTORS);
+
+          if (Services.appinfo.sessionHistoryInParent) {
+            GeckoViewUtils.addLazyGetter(this, "GeckoViewSessionStore", {
+              module: "resource://gre/modules/GeckoViewSessionStore.sys.mjs",
+              observers: [
+                "browsing-context-did-set-embedder",
+                "browsing-context-discarded",
+              ],
+            });
+          }
+
+          GeckoViewUtils.addLazyGetter(this, "GeckoViewWebExtension", {
+            module: "resource://gre/modules/GeckoViewWebExtension.sys.mjs",
+            ged: [
+              "GeckoView:ActionDelegate:Attached",
+              "GeckoView:BrowserAction:Click",
+              "GeckoView:PageAction:Click",
+              "GeckoView:RegisterWebExtension",
+              "GeckoView:UnregisterWebExtension",
+              "GeckoView:WebExtension:CancelInstall",
+              "GeckoView:WebExtension:Disable",
+              "GeckoView:WebExtension:Enable",
+              "GeckoView:WebExtension:EnsureBuiltIn",
+              "GeckoView:WebExtension:Get",
+              "GeckoView:WebExtension:Install",
+              "GeckoView:WebExtension:InstallBuiltIn",
+              "GeckoView:WebExtension:List",
+              "GeckoView:WebExtension:PortDisconnect",
+              "GeckoView:WebExtension:PortMessageFromApp",
+              "GeckoView:WebExtension:SetPBAllowed",
+              "GeckoView:WebExtension:Uninstall",
+              "GeckoView:WebExtension:Update",
+            ],
+            observers: [
+              "devtools-installed-addon",
+              "testing-installed-addon",
+              "testing-uninstalled-addon",
+            ],
+          });
+
+          GeckoViewUtils.addLazyGetter(this, "ChildCrashHandler", {
+            module: "resource://gre/modules/ChildCrashHandler.sys.mjs",
+            observers: ["ipc:content-shutdown", "compositor:process-aborted"],
+          });
+
+          lazy.EventDispatcher.instance.registerListener(this, [
+            "GeckoView:StorageDelegate:Attached",
+          ]);
+        }
+        break;
+      }
+
+      case "profile-after-change": {
+        GeckoViewUtils.addLazyGetter(this, "GeckoViewRemoteDebugger", {
+          module: "resource://gre/modules/GeckoViewRemoteDebugger.sys.mjs",
+          init: gvrd => gvrd.onInit(),
+        });
+
+        GeckoViewUtils.addLazyPrefObserver(
+          {
+            name: "devtools.debugger.remote-enabled",
+            default: false,
+          },
+          {
+            handler: _ => this.GeckoViewRemoteDebugger,
+          }
+        );
+
+        GeckoViewUtils.addLazyGetter(this, "DownloadTracker", {
+          module: "resource://gre/modules/GeckoViewWebExtension.sys.mjs",
+          ged: ["GeckoView:WebExtension:DownloadChanged"],
+        });
+
+        ChromeUtils.importESModule(
+          "resource://gre/modules/NotificationDB.sys.mjs"
+        );
+
+        // Listen for global EventDispatcher messages
+        lazy.EventDispatcher.instance.registerListener(this, [
+          "GeckoView:ResetUserPrefs",
+          "GeckoView:SetDefaultPrefs",
+          "GeckoView:SetLocale",
+        ]);
+
+        Services.obs.addObserver(this, "browser-idle-startup-tasks-finished");
+        Services.obs.addObserver(this, "handlersvc-store-initialized");
+
+        Services.obs.notifyObservers(null, "geckoview-startup-complete");
+        break;
+      }
+      case "browser-idle-startup-tasks-finished": {
+        // TODO bug 1730026: when an alternative is introduced that runs once,
+        // replace this observer topic with that alternative.
+        // This only needs to happen once during startup.
+        Services.obs.removeObserver(this, aTopic);
+        // Notify the start up crash tracker that the browser has successfully
+        // started up so the startup cache isn't rebuilt on next startup.
+        Services.startup.trackStartupCrashEnd();
+        break;
+      }
+      case "handlersvc-store-initialized": {
+        // Initialize PdfJs when running in-process and remote. This only
+        // happens once since PdfJs registers global hooks. If the PdfJs
+        // extension is installed the init method below will be overridden
+        // leaving initialization to the extension.
+        // parent only: configure default prefs, set up pref observers, register
+        // pdf content handler, and initializes parent side message manager
+        // shim for privileged api access.
+        try {
+          lazy.PdfJs.init(this._isNewProfile);
+        } catch {}
+        break;
+      }
+    }
+  }
+
+  onEvent(aEvent, aData, aCallback) {
+    debug`onEvent ${aEvent}`;
+
+    switch (aEvent) {
+      case "GeckoView:ResetUserPrefs": {
+        const prefs = new lazy.Preferences();
+        prefs.reset(aData.names);
+        break;
+      }
+      case "GeckoView:SetDefaultPrefs": {
+        const prefs = new lazy.Preferences({ defaultBranch: true });
+        for (const name of Object.keys(aData)) {
+          try {
+            prefs.set(name, aData[name]);
+          } catch (e) {
+            warn`Failed to set preference ${name}: ${e}`;
+          }
+        }
+        break;
+      }
+      case "GeckoView:SetLocale":
+        if (aData.requestedLocales) {
+          Services.locale.requestedLocales = aData.requestedLocales;
+        }
+        const pls = Cc["@mozilla.org/pref-localizedstring;1"].createInstance(
+          Ci.nsIPrefLocalizedString
+        );
+        pls.data = aData.acceptLanguages;
+        Services.prefs.setComplexValue(
+          "intl.accept_languages",
+          Ci.nsIPrefLocalizedString,
+          pls
+        );
+        break;
+
+      case "GeckoView:StorageDelegate:Attached":
+        InitLater(() => {
+          const loginDetection = Cc[
+            "@mozilla.org/login-detection-service;1"
+          ].createInstance(Ci.nsILoginDetectionService);
+          loginDetection.init();
+        });
+        break;
+    }
+  }
+}
+
+GeckoViewStartup.prototype.classID = Components.ID(
+  "{8e993c34-fdd6-432c-967e-f995d888777f}"
+);
+GeckoViewStartup.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIObserver",
+]);
diff --git a/mobile/android/components/geckoview/GeckoViewStreamListener.cpp b/mobile/android/components/geckoview/GeckoViewStreamListener.cpp
new file mode 100644
index 0000000000..71b9fadeb5
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewStreamListener.cpp
@@ -0,0 +1,298 @@
+/* -*- Mode: c++; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil; -*-
+ * 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 "GeckoViewStreamListener.h"
+
+#include "mozilla/fallible.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsIChannelEventSink.h"
+#include "nsIHttpChannel.h"
+#include "nsIHttpHeaderVisitor.h"
+#include "nsIInputStream.h"
+#include "nsINSSErrorsService.h"
+#include "nsITransportSecurityInfo.h"
+#include "nsIWebProgressListener.h"
+#include "nsIX509Cert.h"
+#include "nsPrintfCString.h"
+
+#include "nsNetUtil.h"
+
+#include "JavaBuiltins.h"
+
+using namespace mozilla;
+
+NS_IMPL_ISUPPORTS(GeckoViewStreamListener, nsIStreamListener,
+                  nsIInterfaceRequestor, nsIChannelEventSink)
+
+class HeaderVisitor final : public nsIHttpHeaderVisitor {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  explicit HeaderVisitor(java::WebResponse::Builder::Param aBuilder)
+      : mBuilder(aBuilder) {}
+
+  NS_IMETHOD
+  VisitHeader(const nsACString& aHeader, const nsACString& aValue) override {
+    mBuilder->Header(aHeader, aValue);
+    return NS_OK;
+  }
+
+ private:
+  virtual ~HeaderVisitor() {}
+
+  const java::WebResponse::Builder::GlobalRef mBuilder;
+};
+
+NS_IMPL_ISUPPORTS(HeaderVisitor, nsIHttpHeaderVisitor)
+
+class StreamSupport final
+    : public java::GeckoInputStream::Support::Natives<StreamSupport> {
+ public:
+  typedef java::GeckoInputStream::Support::Natives<StreamSupport> Base;
+  using Base::AttachNative;
+  using Base::GetNative;
+
+  explicit StreamSupport(java::GeckoInputStream::Support::Param aInstance,
+                         nsIRequest* aRequest)
+      : mInstance(aInstance), mRequest(aRequest) {}
+
+  void Close() {
+    mRequest->Cancel(NS_ERROR_ABORT);
+    mRequest->Resume();
+
+    // This is basically `delete this`, so don't run anything else!
+    Base::DisposeNative(mInstance);
+  }
+
+  void Resume() { mRequest->Resume(); }
+
+ private:
+  java::GeckoInputStream::Support::GlobalRef mInstance;
+  nsCOMPtr<nsIRequest> mRequest;
+};
+
+NS_IMETHODIMP
+GeckoViewStreamListener::OnStartRequest(nsIRequest* aRequest) {
+  MOZ_ASSERT(!mStream);
+
+  nsresult status;
+  aRequest->GetStatus(&status);
+  if (NS_FAILED(status)) {
+    nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
+    CompleteWithError(status, channel);
+    return NS_OK;
+  }
+
+  // We're expecting data later via OnDataAvailable, so create the stream now.
+  InitializeStreamSupport(aRequest);
+
+  mStream = java::GeckoInputStream::New(mSupport);
+
+  // Suspend the request immediately. It will be resumed when (if) someone
+  // tries to read the Java stream.
+  aRequest->Suspend();
+
+  nsresult rv = HandleWebResponse(aRequest);
+  if (NS_FAILED(rv)) {
+    nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
+    CompleteWithError(rv, channel);
+    return NS_OK;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GeckoViewStreamListener::OnStopRequest(nsIRequest* aRequest,
+                                       nsresult aStatusCode) {
+  if (mStream) {
+    if (NS_FAILED(aStatusCode)) {
+      mStream->SendError();
+    } else {
+      mStream->SendEof();
+    }
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP GeckoViewStreamListener::OnDataAvailable(
+    nsIRequest* aRequest, nsIInputStream* aInputStream, uint64_t aOffset,
+    uint32_t aCount) {
+  MOZ_ASSERT(mStream);
+
+  // We only need this for the ReadSegments call, the value is unused.
+  uint32_t countRead;
+  nsresult rv =
+      aInputStream->ReadSegments(WriteSegment, this, aCount, &countRead);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return rv;
+}
+
+NS_IMETHODIMP
+GeckoViewStreamListener::GetInterface(const nsIID& aIID, void** aResultOut) {
+  if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
+    *aResultOut = static_cast<nsIChannelEventSink*>(this);
+    NS_ADDREF_THIS();
+    return NS_OK;
+  }
+
+  return NS_ERROR_NO_INTERFACE;
+}
+
+NS_IMETHODIMP
+GeckoViewStreamListener::AsyncOnChannelRedirect(
+    nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t flags,
+    nsIAsyncVerifyRedirectCallback* callback) {
+  callback->OnRedirectVerifyCallback(NS_OK);
+  return NS_OK;
+}
+
+/* static */
+nsresult GeckoViewStreamListener::WriteSegment(
+    nsIInputStream* aInputStream, void* aClosure, const char* aFromSegment,
+    uint32_t aToOffset, uint32_t aCount, uint32_t* aWriteCount) {
+  GeckoViewStreamListener* self =
+      static_cast<GeckoViewStreamListener*>(aClosure);
+  MOZ_ASSERT(self);
+  MOZ_ASSERT(self->mStream);
+
+  *aWriteCount = aCount;
+
+  jni::ByteArray::LocalRef buffer = jni::ByteArray::New(
+      reinterpret_cast<signed char*>(const_cast<char*>(aFromSegment)),
+      *aWriteCount, fallible);
+  if (!buffer) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (NS_FAILED(self->mStream->AppendBuffer(buffer))) {
+    // The stream was closed or something, abort reading this channel.
+    return NS_ERROR_ABORT;
+  }
+
+  return NS_OK;
+}
+
+nsresult GeckoViewStreamListener::HandleWebResponse(nsIRequest* aRequest) {
+  nsresult rv;
+
+  nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // URI
+  nsCOMPtr<nsIURI> uri;
+  rv = channel->GetURI(getter_AddRefs(uri));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoCString uriSpec;
+  rv = uri->GetSpec(uriSpec);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  java::WebResponse::Builder::LocalRef builder =
+      java::WebResponse::Builder::New(uriSpec);
+
+  // Body stream
+  if (mStream) {
+    builder->Body(mStream);
+  }
+
+  // Redirected
+  nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
+  builder->Redirected(!loadInfo->RedirectChain().IsEmpty());
+
+  // Secure status
+  auto [certBytes, isSecure] = CertificateFromChannel(channel);
+  builder->IsSecure(isSecure);
+  if (certBytes) {
+    rv = builder->CertificateBytes(certBytes);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  // We might need some additional info for response to http/https request
+  nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel, &rv));
+  if (httpChannel) {
+    // Status code
+    uint32_t statusCode;
+    rv = httpChannel->GetResponseStatus(&statusCode);
+    NS_ENSURE_SUCCESS(rv, rv);
+    builder->StatusCode(statusCode);
+
+    // Headers
+    RefPtr<HeaderVisitor> visitor = new HeaderVisitor(builder);
+    rv = httpChannel->VisitResponseHeaders(visitor);
+    NS_ENSURE_SUCCESS(rv, rv);
+  } else {
+    // Headers for other responses
+    // try to provide some basic metadata about the response
+    nsString filename;
+    if (NS_SUCCEEDED(channel->GetContentDispositionFilename(filename))) {
+      builder->Header(jni::StringParam(u"content-disposition"_ns),
+                      nsPrintfCString("attachment; filename=\"%s\"",
+                                      NS_ConvertUTF16toUTF8(filename).get()));
+    }
+
+    nsCString contentType;
+    if (NS_SUCCEEDED(channel->GetContentType(contentType))) {
+      builder->Header(jni::StringParam(u"content-type"_ns), contentType);
+    }
+
+    int64_t contentLength = 0;
+    if (NS_SUCCEEDED(channel->GetContentLength(&contentLength))) {
+      nsString contentLengthString;
+      contentLengthString.AppendInt(contentLength);
+      builder->Header(jni::StringParam(u"content-length"_ns),
+                      contentLengthString);
+    }
+  }
+
+  java::WebResponse::GlobalRef response = builder->Build();
+
+  SendWebResponse(response);
+  return NS_OK;
+}
+
+void GeckoViewStreamListener::InitializeStreamSupport(nsIRequest* aRequest) {
+  StreamSupport::Init();
+
+  mSupport = java::GeckoInputStream::Support::New();
+  StreamSupport::AttachNative(
+      mSupport, mozilla::MakeUnique<StreamSupport>(mSupport, aRequest));
+}
+
+std::tuple<jni::ByteArray::LocalRef, java::sdk::Boolean::LocalRef>
+GeckoViewStreamListener::CertificateFromChannel(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsITransportSecurityInfo> securityInfo;
+  aChannel->GetSecurityInfo(getter_AddRefs(securityInfo));
+  if (!securityInfo) {
+    return std::make_tuple((jni::ByteArray::LocalRef) nullptr,
+                           (java::sdk::Boolean::LocalRef) nullptr);
+  }
+
+  uint32_t securityState = 0;
+  securityInfo->GetSecurityState(&securityState);
+  auto isSecure = securityState == nsIWebProgressListener::STATE_IS_SECURE
+                      ? java::sdk::Boolean::TRUE()
+                      : java::sdk::Boolean::FALSE();
+
+  nsCOMPtr<nsIX509Cert> cert;
+  securityInfo->GetServerCert(getter_AddRefs(cert));
+  if (!cert) {
+    return std::make_tuple((jni::ByteArray::LocalRef) nullptr,
+                           (java::sdk::Boolean::LocalRef) nullptr);
+  }
+
+  nsTArray<uint8_t> derBytes;
+  nsresult rv = cert->GetRawDER(derBytes);
+  NS_ENSURE_SUCCESS(rv,
+                    std::make_tuple((jni::ByteArray::LocalRef) nullptr,
+                                    (java::sdk::Boolean::LocalRef) nullptr));
+
+  auto certBytes = jni::ByteArray::New(
+      reinterpret_cast<const int8_t*>(derBytes.Elements()), derBytes.Length());
+
+  return std::make_tuple(certBytes, isSecure);
+}
diff --git a/mobile/android/components/geckoview/GeckoViewStreamListener.h b/mobile/android/components/geckoview/GeckoViewStreamListener.h
new file mode 100644
index 0000000000..b42249f458
--- /dev/null
+++ b/mobile/android/components/geckoview/GeckoViewStreamListener.h
@@ -0,0 +1,57 @@
+/* -*- Mode: c++; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil; -*-
+ * 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/. */
+
+#ifndef GeckoViewStreamListener_h__
+#define GeckoViewStreamListener_h__
+
+#include "nsIStreamListener.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIChannelEventSink.h"
+
+#include "mozilla/widget/EventDispatcher.h"
+#include "mozilla/java/GeckoInputStreamNatives.h"
+#include "mozilla/java/WebResponseWrappers.h"
+
+#include "JavaBuiltins.h"
+
+namespace mozilla {
+
+class GeckoViewStreamListener : public nsIStreamListener,
+                                public nsIInterfaceRequestor,
+                                public nsIChannelEventSink {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIREQUESTOBSERVER
+  NS_DECL_NSISTREAMLISTENER
+  NS_DECL_NSIINTERFACEREQUESTOR
+  NS_DECL_NSICHANNELEVENTSINK
+
+  explicit GeckoViewStreamListener() {}
+
+  static std::tuple<jni::ByteArray::LocalRef, java::sdk::Boolean::LocalRef>
+  CertificateFromChannel(nsIChannel* aChannel);
+
+ protected:
+  virtual ~GeckoViewStreamListener() {}
+
+  java::GeckoInputStream::GlobalRef mStream;
+  java::GeckoInputStream::Support::GlobalRef mSupport;
+
+  void InitializeStreamSupport(nsIRequest* aRequest);
+
+  static nsresult WriteSegment(nsIInputStream* aInputStream, void* aClosure,
+                               const char* aFromSegment, uint32_t aToOffset,
+                               uint32_t aCount, uint32_t* aWriteCount);
+
+  virtual nsresult HandleWebResponse(nsIRequest* aRequest);
+
+  virtual void SendWebResponse(java::WebResponse::Param aResponse) = 0;
+
+  virtual void CompleteWithError(nsresult aStatus, nsIChannel* aChannel) = 0;
+};
+
+}  // namespace mozilla
+
+#endif  // GeckoViewStreamListener_h__
diff --git a/mobile/android/components/geckoview/LoginStorageDelegate.jsm b/mobile/android/components/geckoview/LoginStorageDelegate.jsm
new file mode 100644
index 0000000000..c5d3b118f4
--- /dev/null
+++ b/mobile/android/components/geckoview/LoginStorageDelegate.jsm
@@ -0,0 +1,138 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["LoginStorageDelegate"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+XPCOMUtils.defineLazyModuleGetters(lazy, {
+  GeckoViewAutocomplete: "resource://gre/modules/GeckoViewAutocomplete.jsm",
+  LoginEntry: "resource://gre/modules/GeckoViewAutocomplete.jsm",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("LoginStorageDelegate");
+
+// Sync with  LoginSaveOption.Hint in Autocomplete.java.
+const LoginStorageHint = {
+  NONE: 0,
+  GENERATED: 1 << 0,
+  LOW_CONFIDENCE: 1 << 1,
+};
+
+class LoginStorageDelegate {
+  _createMessage({ dismissed, autoSavedLoginGuid }, aLogins) {
+    let hint = LoginStorageHint.NONE;
+    if (dismissed) {
+      hint |= LoginStorageHint.LOW_CONFIDENCE;
+    }
+    if (autoSavedLoginGuid) {
+      hint |= LoginStorageHint.GENERATED;
+    }
+    return {
+      // Sync with PromptController
+      type: "Autocomplete:Save:Login",
+      hint,
+      logins: aLogins,
+    };
+  }
+
+  promptToSavePassword(
+    aBrowser,
+    aLogin,
+    dismissed = false,
+    notifySaved = false
+  ) {
+    const prompt = new lazy.GeckoViewPrompter(aBrowser.ownerGlobal);
+    prompt.asyncShowPrompt(
+      this._createMessage({ dismissed }, [
+        lazy.LoginEntry.fromLoginInfo(aLogin),
+      ]),
+      result => {
+        const selectedLogin = result?.selection?.value;
+
+        if (!selectedLogin) {
+          return;
+        }
+
+        const loginInfo = lazy.LoginEntry.parse(selectedLogin).toLoginInfo();
+        Services.obs.notifyObservers(loginInfo, "passwordmgr-prompt-save");
+
+        lazy.GeckoViewAutocomplete.onLoginSave(selectedLogin);
+      }
+    );
+
+    return {
+      dismiss() {
+        prompt.dismiss();
+      },
+    };
+  }
+
+  promptToChangePassword(
+    aBrowser,
+    aOldLogin,
+    aNewLogin,
+    dismissed = false,
+    notifySaved = false,
+    autoSavedLoginGuid = ""
+  ) {
+    const newLogin = lazy.LoginEntry.fromLoginInfo(aOldLogin || aNewLogin);
+    const oldGuid = (aOldLogin && newLogin.guid) || null;
+    newLogin.origin = aNewLogin.origin;
+    newLogin.formActionOrigin = aNewLogin.formActionOrigin;
+    newLogin.password = aNewLogin.password;
+    newLogin.username = aNewLogin.username;
+
+    const prompt = new lazy.GeckoViewPrompter(aBrowser.ownerGlobal);
+    prompt.asyncShowPrompt(
+      this._createMessage({ dismissed, autoSavedLoginGuid }, [newLogin]),
+      result => {
+        const selectedLogin = result?.selection?.value;
+
+        if (!selectedLogin) {
+          return;
+        }
+
+        lazy.GeckoViewAutocomplete.onLoginSave(selectedLogin);
+
+        const loginInfo = lazy.LoginEntry.parse(selectedLogin).toLoginInfo();
+        Services.obs.notifyObservers(
+          loginInfo,
+          "passwordmgr-prompt-change",
+          oldGuid
+        );
+      }
+    );
+
+    return {
+      dismiss() {
+        prompt.dismiss();
+      },
+    };
+  }
+
+  promptToChangePasswordWithUsernames(aBrowser, aLogins, aNewLogin) {
+    this.promptToChangePassword(aBrowser, null /* oldLogin */, aNewLogin);
+  }
+}
+
+LoginStorageDelegate.prototype.classID = Components.ID(
+  "{3d765750-1c3d-11ea-aaef-0800200c9a66}"
+);
+LoginStorageDelegate.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsILoginManagerPrompter",
+]);
diff --git a/mobile/android/components/geckoview/PromptCollection.jsm b/mobile/android/components/geckoview/PromptCollection.jsm
new file mode 100644
index 0000000000..16ec60fd2e
--- /dev/null
+++ b/mobile/android/components/geckoview/PromptCollection.jsm
@@ -0,0 +1,48 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["PromptCollection"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("PromptCollection");
+
+class PromptCollection {
+  confirmRepost(browsingContext) {
+    const msg = {
+      type: "repost",
+    };
+    const prompter = new lazy.GeckoViewPrompter(browsingContext);
+    const result = prompter.showPrompt(msg);
+    return !!result?.allow;
+  }
+
+  asyncBeforeUnloadCheck(browsingContext) {
+    return new Promise(resolve => {
+      const msg = {
+        type: "beforeUnload",
+      };
+      const prompter = new lazy.GeckoViewPrompter(browsingContext);
+      prompter.asyncShowPrompt(msg, resolve);
+    }).then(result => !!result?.allow);
+  }
+
+  confirmFolderUpload() {
+    // Folder upload is not supported by GeckoView yet, see Bug 1674428.
+    return false;
+  }
+}
+
+PromptCollection.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIPromptCollection",
+]);
diff --git a/mobile/android/components/geckoview/ShareDelegate.jsm b/mobile/android/components/geckoview/ShareDelegate.jsm
new file mode 100644
index 0000000000..1e3a133953
--- /dev/null
+++ b/mobile/android/components/geckoview/ShareDelegate.jsm
@@ -0,0 +1,82 @@
+/* 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/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["ShareDelegate"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const domBundle = Services.strings.createBundle(
+  "chrome://global/locale/dom/dom.properties"
+);
+
+const { debug, warn } = GeckoViewUtils.initLogging("ShareDelegate");
+
+class ShareDelegate {
+  init(aParent) {
+    this._openerWindow = aParent;
+  }
+
+  get openerWindow() {
+    return this._openerWindow;
+  }
+
+  async share(aTitle, aText, aUri) {
+    const ABORT = 2;
+    const FAILURE = 1;
+    const SUCCESS = 0;
+
+    const msg = {
+      type: "share",
+      title: aTitle,
+      text: aText,
+      uri: aUri ? aUri.displaySpec : null,
+    };
+    const prompt = new lazy.GeckoViewPrompter(this._openerWindow);
+    const result = await new Promise(resolve => {
+      prompt.asyncShowPrompt(msg, resolve);
+    });
+
+    if (!result) {
+      // A null result is treated as a dismissal in GeckoViewPrompter.
+      throw new DOMException(
+        domBundle.GetStringFromName("WebShareAPI_Aborted"),
+        "AbortError"
+      );
+    }
+
+    const res = result && result.response;
+    switch (res) {
+      case FAILURE:
+        throw new DOMException(
+          domBundle.GetStringFromName("WebShareAPI_Failed"),
+          "DataError"
+        );
+      case ABORT: // Handle aborted attempt and invalid responses the same.
+        throw new DOMException(
+          domBundle.GetStringFromName("WebShareAPI_Aborted"),
+          "AbortError"
+        );
+      case SUCCESS:
+        return;
+      default:
+        throw new DOMException("Unknown error.", "UnknownError");
+    }
+  }
+}
+
+ShareDelegate.prototype.classID = Components.ID(
+  "{1201d357-8417-4926-a694-e6408fbedcf8}"
+);
+ShareDelegate.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsISharePicker",
+]);
diff --git a/mobile/android/components/geckoview/components.conf b/mobile/android/components/geckoview/components.conf
new file mode 100644
index 0000000000..d33567bb74
--- /dev/null
+++ b/mobile/android/components/geckoview/components.conf
@@ -0,0 +1,93 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+Classes = [
+    {
+        'cid': '{3e30d2a0-9934-11ea-bb37-0242ac130002}',
+        'contract_ids': ['@mozilla.org/embedcomp/prompt-collection;1'],
+        'jsm': 'resource://gre/modules/PromptCollection.jsm',
+        'constructor': 'PromptCollection',
+    },
+    {
+        'js_name': 'prompt',
+        'cid': '{076ac188-23c1-4390-aa08-7ef1f78ca5d9}',
+        'contract_ids': [
+            '@mozilla.org/prompter;1',
+        ],
+        'interfaces': ['nsIPromptService'],
+        'jsm': 'resource://gre/modules/GeckoViewPrompt.jsm',
+        'constructor': 'PromptFactory',
+    },
+    {
+        'cid': '{8e993c34-fdd6-432c-967e-f995d888777f}',
+        'contract_ids': ['@mozilla.org/geckoview/startup;1'],
+        'jsm': 'resource://gre/modules/GeckoViewStartup.jsm',
+        'constructor': 'GeckoViewStartup',
+    },
+    {
+        'cid': '{42f3c238-e8e8-4015-9ca2-148723a8afcf}',
+        'contract_ids': ['@mozilla.org/content-permission/prompt;1'],
+        'jsm': 'resource://gre/modules/GeckoViewPermission.jsm',
+        'constructor': 'GeckoViewPermission',
+    },
+    {
+        'cid': '{a54d84d7-98a4-4fec-b664-e42e512ae9cc}',
+        'contract_ids': ['@mozilla.org/push/Service;1'],
+        'jsm': 'resource://gre/modules/GeckoViewPush.jsm',
+        'constructor': 'PushService',
+    },
+    {
+        'cid': '{fc4bec74-ddd0-4ea8-9a66-9a5081258e32}',
+        'contract_ids': ['@mozilla.org/parent/colorpicker;1'],
+        'jsm': 'resource://gre/modules/ColorPickerDelegate.jsm',
+        'constructor': 'ColorPickerDelegate',
+        'processes': ProcessSelector.MAIN_PROCESS_ONLY,
+    },
+    {
+        'cid': '{25fdbae6-f684-4bf0-b773-ff2b7a6273c8}',
+        'contract_ids': ['@mozilla.org/parent/filepicker;1'],
+        'jsm': 'resource://gre/modules/FilePickerDelegate.jsm',
+        'constructor': 'FilePickerDelegate',
+        'processes': ProcessSelector.MAIN_PROCESS_ONLY,
+    },
+    {
+        'cid': '{1201d357-8417-4926-a694-e6408fbedcf8}',
+        'contract_ids': ['@mozilla.org/sharepicker;1'],
+        'jsm': 'resource://gre/modules/ShareDelegate.jsm',
+        'constructor': 'ShareDelegate',
+        'processes': ProcessSelector.MAIN_PROCESS_ONLY,
+    },
+    {
+        'cid': '{3d765750-1c3d-11ea-aaef-0800200c9a66}',
+        'contract_ids': ['@mozilla.org/login-manager/prompter;1'],
+        'jsm': 'resource://gre/modules/LoginStorageDelegate.jsm',
+        'constructor': 'LoginStorageDelegate',
+        'processes': ProcessSelector.MAIN_PROCESS_ONLY,
+    },
+    {
+        'cid': '{91455c77-64a1-4c37-be00-f94eb9c7b8e1}',
+        'contract_ids': [
+            '@mozilla.org/uriloader/external-helper-app-service;1',
+        ],
+        'type': 'GeckoViewExternalAppService',
+        'constructor': 'GeckoViewExternalAppService::GetSingleton',
+        'headers': ['GeckoViewExternalAppService.h'],
+        'processes': ProcessSelector.ALLOW_IN_SOCKET_PROCESS,
+    },
+]
+
+if defined('MOZ_ANDROID_HISTORY'):
+    Classes += [
+        {
+            'name': 'History',
+            'cid': '{0937a705-91a6-417a-8292-b22eb10da86c}',
+            'contract_ids': ['@mozilla.org/browser/history;1'],
+            'singleton': True,
+            'type': 'GeckoViewHistory',
+            'headers': ['GeckoViewHistory.h'],
+            'constructor': 'GeckoViewHistory::GetSingleton',
+        },
+    ]
diff --git a/mobile/android/components/geckoview/moz.build b/mobile/android/components/geckoview/moz.build
new file mode 100644
index 0000000000..607b02f367
--- /dev/null
+++ b/mobile/android/components/geckoview/moz.build
@@ -0,0 +1,49 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+    "GeckoViewExternalAppService.cpp",
+    "GeckoViewOutputStream.cpp",
+    "GeckoViewStreamListener.cpp",
+]
+
+EXPORTS += [
+    "GeckoViewExternalAppService.h",
+    "GeckoViewOutputStream.h",
+    "GeckoViewStreamListener.h",
+]
+
+if CONFIG["MOZ_ANDROID_HISTORY"]:
+    EXPORTS += [
+        "GeckoViewHistory.h",
+    ]
+    SOURCES += [
+        "GeckoViewHistory.cpp",
+    ]
+    include("/ipc/chromium/chromium-config.mozbuild")
+
+XPCOM_MANIFESTS += [
+    "components.conf",
+]
+
+EXTRA_COMPONENTS += [
+    "GeckoView.manifest",
+]
+
+EXTRA_JS_MODULES += [
+    "ColorPickerDelegate.jsm",
+    "FilePickerDelegate.jsm",
+    "GeckoViewPermission.jsm",
+    "GeckoViewPrompt.jsm",
+    "GeckoViewPrompter.sys.mjs",
+    "GeckoViewPush.jsm",
+    "GeckoViewStartup.jsm",
+    "LoginStorageDelegate.jsm",
+    "PromptCollection.jsm",
+    "ShareDelegate.jsm",
+]
+
+FINAL_LIBRARY = "xul"