Adding upstream version 124.0.1.upstream/124.0.1

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

33 files changed, 2959 insertions, 0 deletions

diff --git a/mobile/android/actors/ContentDelegateChild.sys.mjs b/mobile/android/actors/ContentDelegateChild.sys.mjs
new file mode 100644
index 0000000000..3fb9e4ff07
--- /dev/null
+++ b/mobile/android/actors/ContentDelegateChild.sys.mjs
@@ -0,0 +1,167 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  ManifestObtainer: "resource://gre/modules/ManifestObtainer.sys.mjs",
+});
+
+export class ContentDelegateChild extends GeckoViewActorChild {
+  notifyParentOfViewportFit() {
+    if (this.triggerViewportFitChange) {
+      this.contentWindow.cancelIdleCallback(this.triggerViewportFitChange);
+    }
+    this.triggerViewportFitChange = this.contentWindow.requestIdleCallback(
+      () => {
+        this.triggerViewportFitChange = null;
+        const viewportFit = this.contentWindow.windowUtils.getViewportFitInfo();
+        if (this.lastViewportFit === viewportFit) {
+          return;
+        }
+        this.lastViewportFit = viewportFit;
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:DOMMetaViewportFit",
+          viewportfit: viewportFit,
+        });
+      }
+    );
+  }
+
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "contextmenu": {
+        if (aEvent.defaultPrevented) {
+          return;
+        }
+
+        function nearestParentAttribute(aNode, aAttribute) {
+          while (
+            aNode &&
+            aNode.hasAttribute &&
+            !aNode.hasAttribute(aAttribute)
+          ) {
+            aNode = aNode.parentNode;
+          }
+          return aNode && aNode.getAttribute && aNode.getAttribute(aAttribute);
+        }
+
+        function createAbsoluteUri(aBaseUri, aUri) {
+          if (!aUri || !aBaseUri || !aBaseUri.displaySpec) {
+            return null;
+          }
+          return Services.io.newURI(aUri, null, aBaseUri).displaySpec;
+        }
+
+        const node = aEvent.composedTarget;
+        const baseUri = node.ownerDocument.baseURIObject;
+        const uri = createAbsoluteUri(
+          baseUri,
+          nearestParentAttribute(node, "href")
+        );
+        const title = nearestParentAttribute(node, "title");
+        const alt = nearestParentAttribute(node, "alt");
+        const elementType = ChromeUtils.getClassName(node);
+        const isImage = elementType === "HTMLImageElement";
+        const isMedia =
+          elementType === "HTMLVideoElement" ||
+          elementType === "HTMLAudioElement";
+        let elementSrc = (isImage || isMedia) && (node.currentSrc || node.src);
+        if (elementSrc) {
+          const isBlob = elementSrc.startsWith("blob:");
+          if (isBlob && !URL.isValidObjectURL(elementSrc)) {
+            elementSrc = null;
+          }
+        }
+
+        if (uri || isImage || isMedia) {
+          const msg = {
+            type: "GeckoView:ContextMenu",
+            // We don't have full zoom on Android, so using CSS coordinates
+            // here is fine, since the CSS coordinate spaces match between the
+            // child and parent processes.
+            screenX: aEvent.screenX,
+            screenY: aEvent.screenY,
+            baseUri: (baseUri && baseUri.displaySpec) || null,
+            uri,
+            title,
+            alt,
+            elementType,
+            elementSrc: elementSrc || null,
+            textContent: node.textContent || null,
+          };
+
+          this.eventDispatcher.sendRequest(msg);
+          aEvent.preventDefault();
+        }
+        break;
+      }
+      case "MozDOMFullscreen:Request": {
+        this.sendAsyncMessage("GeckoView:DOMFullscreenRequest", {});
+        break;
+      }
+      case "MozDOMFullscreen:Entered":
+      case "MozDOMFullscreen:Exited":
+        // Content may change fullscreen state by itself, and we should ensure
+        // that the parent always exits fullscreen when content has left
+        // full screen mode.
+        if (this.contentWindow?.document.fullscreenElement) {
+          break;
+        }
+      // fall-through
+      case "MozDOMFullscreen:Exit":
+        this.sendAsyncMessage("GeckoView:DOMFullscreenExit", {});
+        break;
+      case "DOMMetaViewportFitChanged":
+        if (aEvent.originalTarget.ownerGlobal == this.contentWindow) {
+          this.notifyParentOfViewportFit();
+        }
+        break;
+      case "DOMContentLoaded": {
+        if (aEvent.originalTarget.ownerGlobal == this.contentWindow) {
+          // If loaded content doesn't have viewport-fit, parent still
+          // uses old value of previous content.
+          this.notifyParentOfViewportFit();
+        }
+        if (this.contentWindow !== this.contentWindow?.top) {
+          // Only check WebApp manifest on the top level window.
+          return;
+        }
+        this.contentWindow.requestIdleCallback(async () => {
+          const manifest = await lazy.ManifestObtainer.contentObtainManifest(
+            this.contentWindow
+          );
+          if (manifest) {
+            this.eventDispatcher.sendRequest({
+              type: "GeckoView:WebAppManifest",
+              manifest,
+            });
+          }
+        });
+        break;
+      }
+      case "MozFirstContentfulPaint": {
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:FirstContentfulPaint",
+        });
+        break;
+      }
+      case "MozPaintStatusReset": {
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:PaintStatusReset",
+        });
+        break;
+      }
+    }
+  }
+}
+
+const { debug, warn } = ContentDelegateChild.initLogging(
+  "ContentDelegateChild"
+);
diff --git a/mobile/android/actors/ContentDelegateParent.sys.mjs b/mobile/android/actors/ContentDelegateParent.sys.mjs
new file mode 100644
index 0000000000..d621c80104
--- /dev/null
+++ b/mobile/android/actors/ContentDelegateParent.sys.mjs
@@ -0,0 +1,75 @@
+/* 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";
+import { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+const { debug, warn } = GeckoViewUtils.initLogging("ContentDelegateParent");
+
+export class ContentDelegateParent extends GeckoViewActorParent {
+  didDestroy() {
+    this._didDestroy = true;
+  }
+
+  async receiveMessage(aMsg) {
+    debug`receiveMessage: ${aMsg.name}`;
+
+    switch (aMsg.name) {
+      case "GeckoView:DOMFullscreenExit": {
+        if (!this.#hasBeenDestroyed() && !this.#requestOrigin) {
+          this.#requestOrigin = this;
+        }
+        this.window.windowUtils.remoteFrameFullscreenReverted();
+        return null;
+      }
+
+      case "GeckoView:DOMFullscreenRequest": {
+        this.#requestOrigin = this;
+        this.window.windowUtils.remoteFrameFullscreenChanged(this.browser);
+        return null;
+      }
+    }
+
+    return super.receiveMessage(aMsg);
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  get #requestOrigin() {
+    const chromeBC = this.browsingContext.topChromeWindow?.browsingContext;
+    const requestOrigin = chromeBC?.fullscreenRequestOrigin;
+    return requestOrigin && requestOrigin.get();
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  set #requestOrigin(aActor) {
+    const chromeBC = this.browsingContext.topChromeWindow?.browsingContext;
+    if (!chromeBC) {
+      debug`not able to get browsingContext for chrome window.`;
+      return;
+    }
+
+    if (aActor) {
+      chromeBC.fullscreenRequestOrigin = Cu.getWeakReference(aActor);
+      return;
+    }
+    delete chromeBC.fullscreenRequestOrigin;
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  #hasBeenDestroyed() {
+    if (this._didDestroy) {
+      return true;
+    }
+
+    // The 'didDestroy' callback is not always getting called.
+    // So we can't rely on it here. Instead, we will try to access
+    // the browsing context to judge wether the actor has
+    // been destroyed or not.
+    try {
+      return !this.browsingContext;
+    } catch {
+      return true;
+    }
+  }
+}
diff --git a/mobile/android/actors/GeckoViewAutoFillChild.sys.mjs b/mobile/android/actors/GeckoViewAutoFillChild.sys.mjs
new file mode 100644
index 0000000000..bd49b7aaf3
--- /dev/null
+++ b/mobile/android/actors/GeckoViewAutoFillChild.sys.mjs
@@ -0,0 +1,395 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  FormLikeFactory: "resource://gre/modules/FormLikeFactory.sys.mjs",
+  LayoutUtils: "resource://gre/modules/LayoutUtils.sys.mjs",
+  LoginManagerChild: "resource://gre/modules/LoginManagerChild.sys.mjs",
+});
+
+export class GeckoViewAutoFillChild extends GeckoViewActorChild {
+  constructor() {
+    super();
+
+    this._autofillElements = undefined;
+    this._autofillInfos = undefined;
+  }
+
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+    switch (aEvent.type) {
+      case "DOMFormHasPassword": {
+        this.addElement(
+          lazy.FormLikeFactory.createFromForm(aEvent.composedTarget)
+        );
+        break;
+      }
+      case "DOMInputPasswordAdded": {
+        const input = aEvent.composedTarget;
+        if (!input.form) {
+          this.addElement(lazy.FormLikeFactory.createFromField(input));
+        }
+        break;
+      }
+      case "focusin": {
+        const element = aEvent.composedTarget;
+        if (!this.contentWindow.HTMLInputElement.isInstance(element)) {
+          break;
+        }
+        GeckoViewUtils.waitForPanZoomState(this.contentWindow).finally(() => {
+          if (Cu.isDeadWrapper(element)) {
+            // Focus element is removed or document is navigated to new page.
+            return;
+          }
+          const focusedElement =
+            Services.focus.focusedElement ||
+            element.ownerDocument?.activeElement;
+          if (element == focusedElement) {
+            this.onFocus(focusedElement);
+          }
+        });
+        break;
+      }
+      case "focusout": {
+        if (
+          this.contentWindow.HTMLInputElement.isInstance(aEvent.composedTarget)
+        ) {
+          this.onFocus(null);
+        }
+        break;
+      }
+      case "pagehide": {
+        if (aEvent.target === this.document) {
+          this.clearElements(this.browsingContext);
+        }
+        break;
+      }
+      case "pageshow": {
+        if (aEvent.target === this.document) {
+          this.scanDocument(this.document);
+        }
+        break;
+      }
+      case "PasswordManager:ShowDoorhanger": {
+        const { form: formLike } = aEvent.detail;
+        this.commitAutofill(formLike);
+        break;
+      }
+    }
+  }
+
+  /**
+   * Process an auto-fillable form and send the relevant details of the form
+   * to Java. Multiple calls within a short time period for the same form are
+   * coalesced, so that, e.g., if multiple inputs are added to a form in
+   * succession, we will only perform one processing pass. Note that for inputs
+   * without forms, FormLikeFactory treats the document as the "form", but
+   * there is no difference in how we process them.
+   *
+   * @param aFormLike A FormLike object produced by FormLikeFactory.
+   */
+  async addElement(aFormLike) {
+    debug`Adding auto-fill ${aFormLike.rootElement.tagName}`;
+
+    const window = aFormLike.rootElement.ownerGlobal;
+    // Get password field to get better form data via LoginManagerChild.
+    let passwordField;
+    for (const field of aFormLike.elements) {
+      if (
+        ChromeUtils.getClassName(field) === "HTMLInputElement" &&
+        field.type == "password"
+      ) {
+        passwordField = field;
+        break;
+      }
+    }
+
+    const loginManagerChild = lazy.LoginManagerChild.forWindow(window);
+    const docState = loginManagerChild.stateForDocument(
+      passwordField.ownerDocument
+    );
+    const [usernameField] = docState.getUserNameAndPasswordFields(
+      passwordField || aFormLike.elements[0]
+    );
+
+    const focusedElement = aFormLike.rootElement.ownerDocument.activeElement;
+    let sendFocusEvent = aFormLike.rootElement === focusedElement;
+
+    const rootInfo = this._getInfo(
+      aFormLike.rootElement,
+      null,
+      undefined,
+      null
+    );
+
+    rootInfo.rootUuid = rootInfo.uuid;
+    rootInfo.children = aFormLike.elements
+      .filter(
+        element =>
+          element.type != "hidden" &&
+          (!usernameField ||
+            element.type != "text" ||
+            element == usernameField ||
+            (element.getAutocompleteInfo() &&
+              element.getAutocompleteInfo().fieldName == "email"))
+      )
+      .map(element => {
+        sendFocusEvent |= element === focusedElement;
+        return this._getInfo(
+          element,
+          rootInfo.uuid,
+          rootInfo.uuid,
+          usernameField
+        );
+      });
+
+    try {
+      // We don't await here so that we can send a focus event immediately
+      // after this as the app might not know which element is focused.
+      const responsePromise = this.sendQuery("Add", {
+        node: rootInfo,
+      });
+
+      if (sendFocusEvent) {
+        // We might have missed sending a focus event for the active element.
+        this.onFocus(aFormLike.ownerDocument.activeElement);
+      }
+
+      const responses = await responsePromise;
+      // `responses` is an object with global IDs as keys.
+      debug`Performing auto-fill ${Object.keys(responses)}`;
+
+      const AUTOFILL_STATE = "autofill";
+      const winUtils = window.windowUtils;
+
+      for (const uuid in responses) {
+        const entry =
+          this._autofillElements && this._autofillElements.get(uuid);
+        const element = entry && entry.get();
+        const value = responses[uuid] || "";
+
+        if (
+          window.HTMLInputElement.isInstance(element) &&
+          !element.disabled &&
+          element.parentElement
+        ) {
+          element.setUserInput(value);
+          if (winUtils && element.value === value) {
+            // Add highlighting for autofilled fields.
+            winUtils.addManuallyManagedState(element, AUTOFILL_STATE);
+
+            // Remove highlighting when the field is changed.
+            element.addEventListener(
+              "input",
+              _ => winUtils.removeManuallyManagedState(element, AUTOFILL_STATE),
+              { mozSystemGroup: true, once: true }
+            );
+          }
+        } else if (element) {
+          warn`Don't know how to auto-fill ${element.tagName}`;
+        }
+      }
+    } catch (error) {
+      warn`Cannot perform autofill ${error}`;
+    }
+  }
+
+  _getInfo(aElement, aParent, aRoot, aUsernameField) {
+    if (!this._autofillInfos) {
+      this._autofillInfos = new WeakMap();
+      this._autofillElements = new Map();
+    }
+
+    let info = this._autofillInfos.get(aElement);
+    if (info) {
+      return info;
+    }
+
+    const window = aElement.ownerGlobal;
+    const bounds = aElement.getBoundingClientRect();
+    const isInputElement = window.HTMLInputElement.isInstance(aElement);
+
+    info = {
+      isInputElement,
+      uuid: Services.uuid.generateUUID().toString().slice(1, -1), // discard the surrounding curly braces
+      parentUuid: aParent,
+      rootUuid: aRoot,
+      tag: aElement.tagName,
+      type: isInputElement ? aElement.type : null,
+      value: isInputElement ? aElement.value : null,
+      editable:
+        isInputElement &&
+        [
+          "color",
+          "date",
+          "datetime-local",
+          "email",
+          "month",
+          "number",
+          "password",
+          "range",
+          "search",
+          "tel",
+          "text",
+          "time",
+          "url",
+          "week",
+        ].includes(aElement.type),
+      disabled: isInputElement ? aElement.disabled : null,
+      attributes: Object.assign(
+        {},
+        ...Array.from(aElement.attributes)
+          .filter(attr => attr.localName !== "value")
+          .map(attr => ({ [attr.localName]: attr.value }))
+      ),
+      origin: aElement.ownerDocument.location.origin,
+      autofillhint: "",
+      bounds: {
+        left: bounds.left,
+        top: bounds.top,
+        right: bounds.right,
+        bottom: bounds.bottom,
+      },
+    };
+
+    if (aElement === aUsernameField) {
+      info.autofillhint = "username"; // AUTOFILL.HINT.USERNAME
+    } else if (isInputElement) {
+      // Using autocomplete attribute if it is email.
+      const autocompleteInfo = aElement.getAutocompleteInfo();
+      if (autocompleteInfo) {
+        const autocompleteAttr = autocompleteInfo.fieldName;
+        if (autocompleteAttr == "email") {
+          info.type = "email";
+        }
+      }
+    }
+
+    this._autofillInfos.set(aElement, info);
+    this._autofillElements.set(info.uuid, Cu.getWeakReference(aElement));
+    return info;
+  }
+
+  _updateInfoValues(aElements) {
+    if (!this._autofillInfos) {
+      return [];
+    }
+
+    const updated = [];
+    for (const element of aElements) {
+      const info = this._autofillInfos.get(element);
+
+      if (!info?.isInputElement || info.value === element.value) {
+        continue;
+      }
+      debug`Updating value ${info.value} to ${element.value}`;
+
+      info.value = element.value;
+      this._autofillInfos.set(element, info);
+      updated.push(info);
+    }
+    return updated;
+  }
+
+  /**
+   * Called when an auto-fillable field is focused or blurred.
+   *
+   * @param aTarget Focused element, or null if an element has lost focus.
+   */
+  onFocus(aTarget) {
+    debug`Auto-fill focus on ${aTarget && aTarget.tagName}`;
+
+    const info = aTarget && this._autofillInfos?.get(aTarget);
+    if (info) {
+      const bounds = aTarget.getBoundingClientRect();
+      const screenRect = lazy.LayoutUtils.rectToScreenRect(
+        aTarget.ownerGlobal,
+        bounds
+      );
+      info.screenRect = {
+        left: screenRect.left,
+        top: screenRect.top,
+        right: screenRect.right,
+        bottom: screenRect.bottom,
+      };
+    }
+
+    if (!aTarget || info) {
+      this.sendAsyncMessage("Focus", {
+        node: info,
+      });
+    }
+  }
+
+  commitAutofill(aFormLike) {
+    if (!aFormLike) {
+      throw new Error("null-form on autofill commit");
+    }
+
+    debug`Committing auto-fill for ${aFormLike.rootElement.tagName}`;
+
+    const updatedNodeInfos = this._updateInfoValues([
+      aFormLike.rootElement,
+      ...aFormLike.elements,
+    ]);
+
+    for (const updatedInfo of updatedNodeInfos) {
+      debug`Updating node ${updatedInfo}`;
+      this.sendAsyncMessage("Update", {
+        node: updatedInfo,
+      });
+    }
+
+    const info = this._getInfo(aFormLike.rootElement);
+    if (info) {
+      debug`Committing node ${info}`;
+      this.sendAsyncMessage("Commit", {
+        node: info,
+      });
+    }
+  }
+
+  /**
+   * Clear all tracked auto-fill forms and notify Java.
+   */
+  clearElements(browsingContext) {
+    this._autofillInfos = undefined;
+    this._autofillElements = undefined;
+
+    if (browsingContext === browsingContext.top) {
+      this.sendAsyncMessage("Clear");
+    }
+  }
+
+  /**
+   * Scan for auto-fillable forms and add them if necessary. Called when a page
+   * is navigated to through history, in which case we don't get our typical
+   * "input added" notifications.
+   *
+   * @param aDoc Document to scan.
+   */
+  scanDocument(aDoc) {
+    // Add forms first; only check forms with password inputs.
+    const inputs = aDoc.querySelectorAll("input[type=password]");
+    let inputAdded = false;
+    for (let i = 0; i < inputs.length; i++) {
+      if (inputs[i].form) {
+        // Let addElement coalesce multiple calls for the same form.
+        this.addElement(lazy.FormLikeFactory.createFromForm(inputs[i].form));
+      } else if (!inputAdded) {
+        // Treat inputs without forms as one unit, and process them only once.
+        inputAdded = true;
+        this.addElement(lazy.FormLikeFactory.createFromField(inputs[i]));
+      }
+    }
+  }
+}
+
+const { debug, warn } = GeckoViewAutoFillChild.initLogging("GeckoViewAutoFill");
diff --git a/mobile/android/actors/GeckoViewAutoFillParent.sys.mjs b/mobile/android/actors/GeckoViewAutoFillParent.sys.mjs
new file mode 100644
index 0000000000..d7248d61fe
--- /dev/null
+++ b/mobile/android/actors/GeckoViewAutoFillParent.sys.mjs
@@ -0,0 +1,89 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  gAutofillManager: "resource://gre/modules/GeckoViewAutofill.sys.mjs",
+});
+
+export class GeckoViewAutoFillParent extends GeckoViewActorParent {
+  constructor() {
+    super();
+    this.sessionId = Services.uuid.generateUUID().toString().slice(1, -1); // discard the surrounding curly braces
+  }
+
+  get rootActor() {
+    return this.browsingContext.top.currentWindowGlobal.getActor(
+      "GeckoViewAutoFill"
+    );
+  }
+
+  get autofill() {
+    return lazy.gAutofillManager.get(this.sessionId);
+  }
+
+  add(node) {
+    // We will start a new session if the current one does not exist.
+    const autofill = lazy.gAutofillManager.ensure(
+      this.sessionId,
+      this.eventDispatcher
+    );
+    return autofill?.add(node);
+  }
+
+  focus(node) {
+    this.autofill?.focus(node);
+  }
+
+  commit(node) {
+    this.autofill?.commit(node);
+  }
+
+  update(node) {
+    this.autofill?.update(node);
+  }
+
+  clear() {
+    lazy.gAutofillManager.delete(this.sessionId);
+  }
+
+  async receiveMessage(aMessage) {
+    const { name } = aMessage;
+    debug`receiveMessage ${name}`;
+
+    // We need to re-route all messages through the root actor to ensure that we
+    // have a consistent sessionId for the entire browsingContext tree.
+    switch (name) {
+      case "Add": {
+        return this.rootActor.add(aMessage.data.node);
+      }
+      case "Focus": {
+        this.rootActor.focus(aMessage.data.node);
+        break;
+      }
+      case "Update": {
+        this.rootActor.update(aMessage.data.node);
+        break;
+      }
+      case "Commit": {
+        this.rootActor.commit(aMessage.data.node);
+        break;
+      }
+      case "Clear": {
+        if (this.browsingContext === this.browsingContext.top) {
+          this.clear();
+        }
+        break;
+      }
+    }
+
+    return null;
+  }
+}
+
+const { debug, warn } =
+  GeckoViewAutoFillParent.initLogging("GeckoViewAutoFill");
diff --git a/mobile/android/actors/GeckoViewContentChild.sys.mjs b/mobile/android/actors/GeckoViewContentChild.sys.mjs
new file mode 100644
index 0000000000..97691c97fd
--- /dev/null
+++ b/mobile/android/actors/GeckoViewContentChild.sys.mjs
@@ -0,0 +1,335 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+// This needs to match ScreenLength.java
+const SCREEN_LENGTH_TYPE_PIXEL = 0;
+const SCREEN_LENGTH_TYPE_VISUAL_VIEWPORT_WIDTH = 1;
+const SCREEN_LENGTH_TYPE_VISUAL_VIEWPORT_HEIGHT = 2;
+const SCREEN_LENGTH_DOCUMENT_WIDTH = 3;
+const SCREEN_LENGTH_DOCUMENT_HEIGHT = 4;
+
+// This need to match PanZoomController.java
+const SCROLL_BEHAVIOR_SMOOTH = 0;
+const SCROLL_BEHAVIOR_AUTO = 1;
+
+const SCREEN_ORIENTATION_PORTRAIT = 0;
+const SCREEN_ORIENTATION_LANDSCAPE = 1;
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  PrivacyFilter: "resource://gre/modules/sessionstore/PrivacyFilter.sys.mjs",
+  SessionHistory: "resource://gre/modules/sessionstore/SessionHistory.sys.mjs",
+  Utils: "resource://gre/modules/sessionstore/Utils.sys.mjs",
+});
+
+export class GeckoViewContentChild extends GeckoViewActorChild {
+  constructor() {
+    super();
+    this.lastOrientation = SCREEN_ORIENTATION_PORTRAIT;
+  }
+
+  actorCreated() {
+    super.actorCreated();
+
+    this.pageShow = new Promise(resolve => {
+      this.receivedPageShow = resolve;
+    });
+  }
+
+  toPixels(aLength, aType) {
+    const { contentWindow } = this;
+    if (aType === SCREEN_LENGTH_TYPE_PIXEL) {
+      return aLength;
+    } else if (aType === SCREEN_LENGTH_TYPE_VISUAL_VIEWPORT_WIDTH) {
+      return aLength * contentWindow.visualViewport.width;
+    } else if (aType === SCREEN_LENGTH_TYPE_VISUAL_VIEWPORT_HEIGHT) {
+      return aLength * contentWindow.visualViewport.height;
+    } else if (aType === SCREEN_LENGTH_DOCUMENT_WIDTH) {
+      return aLength * contentWindow.document.body.scrollWidth;
+    } else if (aType === SCREEN_LENGTH_DOCUMENT_HEIGHT) {
+      return aLength * contentWindow.document.body.scrollHeight;
+    }
+
+    return aLength;
+  }
+
+  toScrollBehavior(aBehavior) {
+    const { contentWindow } = this;
+    if (!contentWindow) {
+      return 0;
+    }
+    const { windowUtils } = contentWindow;
+    if (aBehavior === SCROLL_BEHAVIOR_SMOOTH) {
+      return windowUtils.SCROLL_MODE_SMOOTH;
+    } else if (aBehavior === SCROLL_BEHAVIOR_AUTO) {
+      return windowUtils.SCROLL_MODE_INSTANT;
+    }
+    return windowUtils.SCROLL_MODE_SMOOTH;
+  }
+
+  collectSessionState() {
+    const { docShell, contentWindow } = this;
+    const history = lazy.SessionHistory.collect(docShell);
+    let formdata = SessionStoreUtils.collectFormData(contentWindow);
+    let scrolldata = SessionStoreUtils.collectScrollPosition(contentWindow);
+
+    // Save the current document resolution.
+    let zoom = 1;
+    const domWindowUtils = contentWindow.windowUtils;
+    zoom = domWindowUtils.getResolution();
+    scrolldata = scrolldata || {};
+    scrolldata.zoom = {};
+    scrolldata.zoom.resolution = zoom;
+
+    // Save some data that'll help in adjusting the zoom level
+    // when restoring in a different screen orientation.
+    const displaySize = {};
+    const width = {},
+      height = {};
+    domWindowUtils.getDocumentViewerSize(width, height);
+
+    displaySize.width = width.value;
+    displaySize.height = height.value;
+
+    scrolldata.zoom.displaySize = displaySize;
+
+    formdata = lazy.PrivacyFilter.filterFormData(formdata || {});
+
+    return { history, formdata, scrolldata };
+  }
+
+  orientation() {
+    const currentOrientationType = this.contentWindow?.screen.orientation.type;
+    if (!currentOrientationType) {
+      // Unfortunately, we don't know current screen orientation.
+      // Return portrait as default.
+      return SCREEN_ORIENTATION_PORTRAIT;
+    }
+    if (currentOrientationType.startsWith("landscape")) {
+      return SCREEN_ORIENTATION_LANDSCAPE;
+    }
+    return SCREEN_ORIENTATION_PORTRAIT;
+  }
+
+  receiveMessage(message) {
+    const { name } = message;
+    debug`receiveMessage: ${name}`;
+
+    switch (name) {
+      case "GeckoView:DOMFullscreenEntered":
+        this.lastOrientation = this.orientation();
+        if (
+          !this.contentWindow?.windowUtils.handleFullscreenRequests() &&
+          !this.contentWindow?.document.fullscreenElement
+        ) {
+          // If we don't actually have any pending fullscreen request
+          // to handle, neither we have been in fullscreen, tell the
+          // parent to just exit.
+          const actor =
+            this.contentWindow?.windowGlobalChild?.getActor("ContentDelegate");
+          actor?.sendAsyncMessage("GeckoView:DOMFullscreenExit", {});
+        }
+        break;
+      case "GeckoView:DOMFullscreenExited":
+        // During fullscreen, window size is changed. So don't restore viewport size.
+        const restoreViewSize = this.orientation() == this.lastOrientation;
+        this.contentWindow?.windowUtils.exitFullscreen(!restoreViewSize);
+        break;
+      case "GeckoView:ZoomToInput": {
+        const { contentWindow } = this;
+        const dwu = contentWindow.windowUtils;
+
+        const zoomToFocusedInput = function () {
+          if (!dwu.flushApzRepaints()) {
+            dwu.zoomToFocusedInput();
+            return;
+          }
+          Services.obs.addObserver(function apzFlushDone() {
+            Services.obs.removeObserver(apzFlushDone, "apz-repaints-flushed");
+            dwu.zoomToFocusedInput();
+          }, "apz-repaints-flushed");
+        };
+
+        const { force } = message.data;
+
+        let gotResize = false;
+        const onResize = function () {
+          gotResize = true;
+          if (dwu.isMozAfterPaintPending) {
+            contentWindow.windowRoot.addEventListener(
+              "MozAfterPaint",
+              () => zoomToFocusedInput(),
+              { capture: true, once: true }
+            );
+          } else {
+            zoomToFocusedInput();
+          }
+        };
+
+        contentWindow.addEventListener("resize", onResize, { capture: true });
+
+        // When the keyboard is displayed, we can get one resize event,
+        // multiple resize events, or none at all. Try to handle all these
+        // cases by allowing resizing within a set interval, and still zoom to
+        // input if there is no resize event at the end of the interval.
+        contentWindow.setTimeout(() => {
+          contentWindow.removeEventListener("resize", onResize, {
+            capture: true,
+          });
+          if (!gotResize && force) {
+            onResize();
+          }
+        }, 500);
+        break;
+      }
+      case "RestoreSessionState": {
+        this.restoreSessionState(message);
+        break;
+      }
+      case "RestoreHistoryAndNavigate": {
+        const { history, switchId } = message.data;
+        if (history) {
+          lazy.SessionHistory.restore(this.docShell, history);
+          const historyIndex = history.requestedIndex - 1;
+          const webNavigation = this.docShell.QueryInterface(
+            Ci.nsIWebNavigation
+          );
+
+          if (!switchId) {
+            // TODO: Bug 1648158 This won't work for Fission or HistoryInParent.
+            webNavigation.sessionHistory.legacySHistory.reloadCurrentEntry();
+          } else {
+            webNavigation.resumeRedirectedLoad(switchId, historyIndex);
+          }
+        }
+        break;
+      }
+      case "GeckoView:UpdateInitData": {
+        // Provide a hook for native code to detect a transfer.
+        Services.obs.notifyObservers(
+          this.docShell,
+          "geckoview-content-global-transferred"
+        );
+        break;
+      }
+      case "GeckoView:ScrollBy": {
+        const x = {};
+        const y = {};
+        const { contentWindow } = this;
+        const { widthValue, widthType, heightValue, heightType, behavior } =
+          message.data;
+        contentWindow.windowUtils.getVisualViewportOffset(x, y);
+        contentWindow.windowUtils.scrollToVisual(
+          x.value + this.toPixels(widthValue, widthType),
+          y.value + this.toPixels(heightValue, heightType),
+          contentWindow.windowUtils.UPDATE_TYPE_MAIN_THREAD,
+          this.toScrollBehavior(behavior)
+        );
+        break;
+      }
+      case "GeckoView:ScrollTo": {
+        const { contentWindow } = this;
+        const { widthValue, widthType, heightValue, heightType, behavior } =
+          message.data;
+        contentWindow.windowUtils.scrollToVisual(
+          this.toPixels(widthValue, widthType),
+          this.toPixels(heightValue, heightType),
+          contentWindow.windowUtils.UPDATE_TYPE_MAIN_THREAD,
+          this.toScrollBehavior(behavior)
+        );
+        break;
+      }
+      case "CollectSessionState": {
+        return this.collectSessionState();
+      }
+      case "ContainsFormData": {
+        return this.containsFormData();
+      }
+    }
+
+    return null;
+  }
+
+  async containsFormData() {
+    const { contentWindow } = this;
+    let formdata = SessionStoreUtils.collectFormData(contentWindow);
+    formdata = lazy.PrivacyFilter.filterFormData(formdata || {});
+    if (formdata) {
+      return true;
+    }
+    return false;
+  }
+
+  async restoreSessionState(message) {
+    // Make sure we showed something before restoring scrolling and form data
+    await this.pageShow;
+
+    const { contentWindow } = this;
+    const { formdata, scrolldata } = message.data;
+
+    if (formdata) {
+      lazy.Utils.restoreFrameTreeData(
+        contentWindow,
+        formdata,
+        (frame, data) => {
+          // restore() will return false, and thus abort restoration for the
+          // current |frame| and its descendants, if |data.url| is given but
+          // doesn't match the loaded document's URL.
+          return SessionStoreUtils.restoreFormData(frame.document, data);
+        }
+      );
+    }
+
+    if (scrolldata) {
+      lazy.Utils.restoreFrameTreeData(
+        contentWindow,
+        scrolldata,
+        (frame, data) => {
+          if (data.scroll) {
+            SessionStoreUtils.restoreScrollPosition(frame, data);
+          }
+        }
+      );
+    }
+
+    if (scrolldata && scrolldata.zoom && scrolldata.zoom.displaySize) {
+      const utils = contentWindow.windowUtils;
+      // Restore zoom level.
+      utils.setRestoreResolution(
+        scrolldata.zoom.resolution,
+        scrolldata.zoom.displaySize.width,
+        scrolldata.zoom.displaySize.height
+      );
+    }
+  }
+
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "pageshow": {
+        this.receivedPageShow();
+        break;
+      }
+
+      case "mozcaretstatechanged":
+        if (
+          aEvent.reason === "presscaret" ||
+          aEvent.reason === "releasecaret"
+        ) {
+          this.eventDispatcher.sendRequest({
+            type: "GeckoView:PinOnScreen",
+            pinned: aEvent.reason === "presscaret",
+          });
+        }
+        break;
+    }
+  }
+}
+
+const { debug, warn } = GeckoViewContentChild.initLogging("GeckoViewContent");
diff --git a/mobile/android/actors/GeckoViewContentParent.sys.mjs b/mobile/android/actors/GeckoViewContentParent.sys.mjs
new file mode 100644
index 0000000000..354489054a
--- /dev/null
+++ b/mobile/android/actors/GeckoViewContentParent.sys.mjs
@@ -0,0 +1,84 @@
+/* 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";
+import { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  SessionHistory: "resource://gre/modules/sessionstore/SessionHistory.sys.mjs",
+});
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewContentParent");
+
+export class GeckoViewContentParent extends GeckoViewActorParent {
+  async collectState() {
+    return this.sendQuery("CollectSessionState");
+  }
+
+  async containsFormData() {
+    return this.sendQuery("ContainsFormData");
+  }
+
+  restoreState({ history, switchId, formdata, scrolldata }) {
+    if (Services.appinfo.sessionHistoryInParent) {
+      const { browsingContext } = this.browser;
+      lazy.SessionHistory.restoreFromParent(
+        browsingContext.sessionHistory,
+        history
+      );
+
+      // TODO Bug 1648158 this should include scroll, form history, etc
+      return SessionStoreUtils.initializeRestore(
+        browsingContext,
+        SessionStoreUtils.constructSessionStoreRestoreData()
+      );
+    }
+
+    // Restoring is made of two parts. First we need to restore the history
+    // of the tab and navigating to the current page, after the page
+    // navigates to the current page we need to restore the state of the
+    // page (scroll position, form data, etc).
+    //
+    // We can't do everything in one step inside the child actor because
+    // the actor is recreated when navigating, so we need to keep the state
+    // on the parent side until we navigate.
+    this.sendAsyncMessage("RestoreHistoryAndNavigate", {
+      history,
+      switchId,
+    });
+
+    if (!formdata && !scrolldata) {
+      return null;
+    }
+
+    const progressFilter = Cc[
+      "@mozilla.org/appshell/component/browser-status-filter;1"
+    ].createInstance(Ci.nsIWebProgress);
+
+    const { browser } = this;
+    const progressListener = {
+      QueryInterface: ChromeUtils.generateQI(["nsIWebProgressListener"]),
+
+      onLocationChange(aWebProgress, aRequest, aLocationURI, aFlags) {
+        if (!aWebProgress.isTopLevel) {
+          return;
+        }
+        // The actor might get recreated between navigations so we need to
+        // query it again for the up-to-date instance.
+        browser.browsingContext.currentWindowGlobal
+          .getActor("GeckoViewContent")
+          .sendAsyncMessage("RestoreSessionState", { formdata, scrolldata });
+        progressFilter.removeProgressListener(this);
+        browser.removeProgressListener(progressFilter);
+      },
+    };
+
+    const flags = Ci.nsIWebProgress.NOTIFY_LOCATION;
+    progressFilter.addProgressListener(progressListener, flags);
+    browser.addProgressListener(progressFilter, flags);
+    return null;
+  }
+}
diff --git a/mobile/android/actors/GeckoViewExperimentDelegateParent.sys.mjs b/mobile/android/actors/GeckoViewExperimentDelegateParent.sys.mjs
new file mode 100644
index 0000000000..5e83ef9063
--- /dev/null
+++ b/mobile/android/actors/GeckoViewExperimentDelegateParent.sys.mjs
@@ -0,0 +1,69 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+export class GeckoViewExperimentDelegateParent extends GeckoViewActorParent {
+  constructor() {
+    super();
+  }
+
+  /**
+   * Gets experiment information on a given feature.
+   *
+   * @param feature the experiment item to retrieve information on
+   * @returns a promise of success with a JSON message or failure
+   */
+  async getExperimentFeature(feature) {
+    return this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:GetExperimentFeature",
+      feature,
+    });
+  }
+
+  /**
+   * Records an exposure event, that the experiment area was encountered, on a given feature.
+   *
+   * @param feature the experiment item to record an exposure event of
+   * @returns a promise of success or failure
+   */
+  async recordExposure(feature) {
+    return this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:RecordExposure",
+      feature,
+    });
+  }
+
+  /**
+   * Records an exposure event on a specific experiment feature and element.
+   *
+   * Note: Use recordExposure, if the slug is not known.
+   *
+   * @param feature the experiment item to record an exposure event of
+   * @param slug a specific experiment element
+   * @returns a promise of success or failure
+   */
+  async recordExperimentExposure(feature, slug) {
+    return this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:RecordExperimentExposure",
+      feature,
+      slug,
+    });
+  }
+
+  /**
+   * For recording malformed configuration.
+   *
+   * @param feature the experiment item to record an exposure event of
+   * @param part malformed information to send
+   * @returns a promise of success or failure
+   */
+  async recordExperimentMalformedConfig(feature, part) {
+    return this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:RecordMalformedConfig",
+      feature,
+      part,
+    });
+  }
+}
diff --git a/mobile/android/actors/GeckoViewFormValidationChild.sys.mjs b/mobile/android/actors/GeckoViewFormValidationChild.sys.mjs
new file mode 100644
index 0000000000..869271cfe7
--- /dev/null
+++ b/mobile/android/actors/GeckoViewFormValidationChild.sys.mjs
@@ -0,0 +1,19 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class GeckoViewFormValidationChild extends GeckoViewActorChild {
+  handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "MozInvalidForm": {
+        // Handle invalid form submission. If we don't hook up to this,
+        // invalid forms are allowed to be submitted!
+        aEvent.preventDefault();
+        // We should show the validation message, bug 1510450.
+        break;
+      }
+    }
+  }
+}
diff --git a/mobile/android/actors/GeckoViewPermissionChild.sys.mjs b/mobile/android/actors/GeckoViewPermissionChild.sys.mjs
new file mode 100644
index 0000000000..bbe9457cc5
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPermissionChild.sys.mjs
@@ -0,0 +1,188 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  E10SUtils: "resource://gre/modules/E10SUtils.sys.mjs",
+});
+
+const PERM_ACCESS_FINE_LOCATION = "android.permission.ACCESS_FINE_LOCATION";
+
+const MAPPED_TO_EXTENSION_PERMISSIONS = [
+  "persistent-storage",
+  // TODO(Bug 1336194): support geolocation manifest permission
+  // (see https://bugzilla.mozilla.org/show_bug.cgi?id=1336194#c17)l
+];
+
+export class GeckoViewPermissionChild extends GeckoViewActorChild {
+  getMediaPermission(aPermission) {
+    return this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:MediaPermission",
+      ...aPermission,
+    });
+  }
+
+  addCameraPermission() {
+    return this.sendQuery("AddCameraPermission");
+  }
+
+  getAppPermissions(aPermissions) {
+    return this.sendQuery("GetAppPermissions", aPermissions);
+  }
+
+  mediaRecordingStatusChanged(aDevices) {
+    return this.eventDispatcher.sendRequest({
+      type: "GeckoView:MediaRecordingStatusChanged",
+      devices: aDevices,
+    });
+  }
+
+  // Some WebAPI permissions can be requested and granted to extensions through the
+  // the extension manifest.json, which the user have been already prompted for
+  // (e.g. at install time for the one listed in the manifest.json permissions property,
+  // or at runtime through the optional_permissions property and the permissions.request
+  // WebExtensions API method).
+  //
+  // WebAPI permission that are expected to be mapped to extensions permissions are listed
+  // in the MAPPED_TO_EXTENSION_PERMISSIONS array.
+  //
+  // @param {nsIContentPermissionType} perm
+  //        The WebAPI permission being requested
+  // @param {nsIContentPermissionRequest} aRequest
+  //        The nsIContentPermissionRequest as received by the promptPermission method.
+  //
+  // @returns {null | { allow: boolean, permission: Object }
+  //          Returns null if the request was not handled and should continue with the
+  //          regular permission prompting flow, otherwise it returns an object to
+  //          allow or disallow the permission request right away.
+  checkIfGrantedByExtensionPermissions(perm, aRequest) {
+    if (!aRequest.principal.addonPolicy) {
+      // Not an extension, continue with the regular permission prompting flow.
+      return null;
+    }
+
+    // Return earlier and continue with the regular permission prompting flow if the
+    // the permission is no one that can be requested from the extension manifest file.
+    if (!MAPPED_TO_EXTENSION_PERMISSIONS.includes(perm.type)) {
+      return null;
+    }
+
+    // Disallow if the extension is not active anymore.
+    if (!aRequest.principal.addonPolicy.active) {
+      return { allow: false };
+    }
+
+    // Check if the permission have been already granted to the extension, if it is allow it right away.
+    const isGranted =
+      Services.perms.testPermissionFromPrincipal(
+        aRequest.principal,
+        perm.type
+      ) === Services.perms.ALLOW_ACTION;
+    if (isGranted) {
+      return {
+        allow: true,
+        permission: { [perm.type]: Services.perms.ALLOW_ACTION },
+      };
+    }
+
+    // continue with the regular permission prompting flow otherwise.
+    return null;
+  }
+
+  async promptPermission(aRequest) {
+    // Only allow exactly one permission request here.
+    const types = aRequest.types.QueryInterface(Ci.nsIArray);
+    if (types.length !== 1) {
+      return { allow: false };
+    }
+
+    const perm = types.queryElementAt(0, Ci.nsIContentPermissionType);
+
+    // Check if the request principal is an extension principal and if the permission requested
+    // should be already granted based on the extension permissions (or disallowed right away
+    // because the extension is not enabled anymore.
+    const extensionResult = this.checkIfGrantedByExtensionPermissions(
+      perm,
+      aRequest
+    );
+    if (extensionResult) {
+      return extensionResult;
+    }
+
+    if (
+      perm.type === "desktop-notification" &&
+      !aRequest.hasValidTransientUserGestureActivation &&
+      Services.prefs.getBoolPref(
+        "dom.webnotifications.requireuserinteraction",
+        true
+      )
+    ) {
+      // We need user interaction and don't have it.
+      return { allow: false };
+    }
+
+    const principal =
+      perm.type === "storage-access"
+        ? aRequest.principal
+        : aRequest.topLevelPrincipal;
+
+    let allowOrDeny;
+    try {
+      allowOrDeny = await this.eventDispatcher.sendRequestForResult({
+        type: "GeckoView:ContentPermission",
+        uri: principal.URI.displaySpec,
+        thirdPartyOrigin: aRequest.principal.origin,
+        principal: lazy.E10SUtils.serializePrincipal(principal),
+        perm: perm.type,
+        value: perm.capability,
+        contextId: principal.originAttributes.geckoViewSessionContextId ?? null,
+        privateMode: principal.privateBrowsingId != 0,
+      });
+
+      if (allowOrDeny === Services.perms.ALLOW_ACTION) {
+        // Ask for app permission after asking for content permission.
+        if (perm.type === "geolocation") {
+          const granted = await this.getAppPermissions([
+            PERM_ACCESS_FINE_LOCATION,
+          ]);
+          allowOrDeny = granted
+            ? Services.perms.ALLOW_ACTION
+            : Services.perms.DENY_ACTION;
+        }
+      }
+    } catch (error) {
+      console.error("Permission error:", error);
+      allowOrDeny = Services.perms.DENY_ACTION;
+    }
+
+    // Manually release the target request here to facilitate garbage collection.
+    aRequest = undefined;
+
+    const allow = allowOrDeny === Services.perms.ALLOW_ACTION;
+
+    // The storage access code adds itself to the perm manager; no need for us to do it.
+    if (perm.type === "storage-access") {
+      if (allow) {
+        return { allow, permission: { "storage-access": "allow" } };
+      }
+      return { allow };
+    }
+
+    Services.perms.addFromPrincipal(
+      principal,
+      perm.type,
+      allowOrDeny,
+      Services.perms.EXPIRE_NEVER
+    );
+
+    return { allow };
+  }
+}
+
+const { debug, warn } = GeckoViewPermissionChild.initLogging(
+  "GeckoViewPermissionChild"
+);
diff --git a/mobile/android/actors/GeckoViewPermissionParent.sys.mjs b/mobile/android/actors/GeckoViewPermissionParent.sys.mjs
new file mode 100644
index 0000000000..c4a5cf56cf
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPermissionParent.sys.mjs
@@ -0,0 +1,65 @@
+/* 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";
+import { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+export class GeckoViewPermissionParent extends GeckoViewActorParent {
+  _appPermissions = {};
+
+  async getAppPermissions(aPermissions) {
+    const perms = aPermissions.filter(perm => !this._appPermissions[perm]);
+    if (!perms.length) {
+      return Promise.resolve(/* granted */ true);
+    }
+
+    const granted = await this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:AndroidPermission",
+      perms,
+    });
+
+    if (granted) {
+      for (const perm of perms) {
+        this._appPermissions[perm] = true;
+      }
+    }
+
+    return granted;
+  }
+
+  addCameraPermission() {
+    const principal =
+      Services.scriptSecurityManager.createContentPrincipalFromOrigin(
+        this.browsingContext.top.currentWindowGlobal.documentPrincipal.origin
+      );
+
+    // Although the lifetime is "session" it will be removed upon
+    // use so it's more of a one-shot.
+    Services.perms.addFromPrincipal(
+      principal,
+      "MediaManagerVideo",
+      Services.perms.ALLOW_ACTION,
+      Services.perms.EXPIRE_SESSION
+    );
+
+    return null;
+  }
+
+  receiveMessage(aMessage) {
+    debug`receiveMessage ${aMessage.name}`;
+
+    switch (aMessage.name) {
+      case "GetAppPermissions": {
+        return this.getAppPermissions(aMessage.data);
+      }
+      case "AddCameraPermission": {
+        return this.addCameraPermission();
+      }
+    }
+
+    return super.receiveMessage(aMessage);
+  }
+}
+
+const { debug, warn } = GeckoViewUtils.initLogging("GeckoViewPermissionParent");
diff --git a/mobile/android/actors/GeckoViewPermissionProcessChild.sys.mjs b/mobile/android/actors/GeckoViewPermissionProcessChild.sys.mjs
new file mode 100644
index 0000000000..2c9d271bbd
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPermissionProcessChild.sys.mjs
@@ -0,0 +1,191 @@
+/* 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";
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+XPCOMUtils.defineLazyServiceGetter(
+  lazy,
+  "MediaManagerService",
+  "@mozilla.org/mediaManagerService;1",
+  "nsIMediaManagerService"
+);
+
+const STATUS_RECORDING = "recording";
+const STATUS_INACTIVE = "inactive";
+const TYPE_CAMERA = "camera";
+const TYPE_MICROPHONE = "microphone";
+
+export class GeckoViewPermissionProcessChild extends JSProcessActorChild {
+  getActor(window) {
+    return window.windowGlobalChild.getActor("GeckoViewPermission");
+  }
+
+  /* ----------  nsIObserver  ---------- */
+  async observe(aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "getUserMedia:ask-device-permission": {
+        await this.sendQuery("AskDevicePermission", aData);
+        Services.obs.notifyObservers(
+          aSubject,
+          "getUserMedia:got-device-permission"
+        );
+        break;
+      }
+      case "getUserMedia:request": {
+        const { callID } = aSubject;
+        const allowedDevices = await this.handleMediaRequest(aSubject);
+        Services.obs.notifyObservers(
+          allowedDevices,
+          allowedDevices
+            ? "getUserMedia:response:allow"
+            : "getUserMedia:response:deny",
+          callID
+        );
+        break;
+      }
+      case "PeerConnection:request": {
+        Services.obs.notifyObservers(
+          null,
+          "PeerConnection:response:allow",
+          aSubject.callID
+        );
+        break;
+      }
+      case "recording-device-events": {
+        this.handleRecordingDeviceEvents(aSubject);
+        break;
+      }
+    }
+  }
+
+  handleRecordingDeviceEvents(aRequest) {
+    aRequest.QueryInterface(Ci.nsIPropertyBag2);
+    const contentWindow = aRequest.getProperty("window");
+    const devices = [];
+
+    const getStatusString = function (activityStatus) {
+      switch (activityStatus) {
+        case lazy.MediaManagerService.STATE_CAPTURE_ENABLED:
+        case lazy.MediaManagerService.STATE_CAPTURE_DISABLED:
+          return STATUS_RECORDING;
+        case lazy.MediaManagerService.STATE_NOCAPTURE:
+          return STATUS_INACTIVE;
+        default:
+          throw new Error("Unexpected activityStatus value");
+      }
+    };
+
+    const hasCamera = {};
+    const hasMicrophone = {};
+    const screen = {};
+    const window = {};
+    const browser = {};
+    const mediaDevices = {};
+    lazy.MediaManagerService.mediaCaptureWindowState(
+      contentWindow,
+      hasCamera,
+      hasMicrophone,
+      screen,
+      window,
+      browser,
+      mediaDevices
+    );
+    var cameraStatus = getStatusString(hasCamera.value);
+    var microphoneStatus = getStatusString(hasMicrophone.value);
+    if (hasCamera.value != lazy.MediaManagerService.STATE_NOCAPTURE) {
+      devices.push({
+        type: TYPE_CAMERA,
+        status: cameraStatus,
+      });
+    }
+    if (hasMicrophone.value != lazy.MediaManagerService.STATE_NOCAPTURE) {
+      devices.push({
+        type: TYPE_MICROPHONE,
+        status: microphoneStatus,
+      });
+    }
+    this.getActor(contentWindow).mediaRecordingStatusChanged(devices);
+  }
+
+  async handleMediaRequest(aRequest) {
+    const constraints = aRequest.getConstraints();
+    const { devices, windowID } = aRequest;
+    const window = Services.wm.getOuterWindowWithId(windowID);
+    if (window.closed) {
+      return null;
+    }
+
+    // Release the request first
+    aRequest = undefined;
+
+    const sources = devices.map(device => {
+      device = device.QueryInterface(Ci.nsIMediaDevice);
+      return {
+        type: device.type,
+        id: device.rawId,
+        rawId: device.rawId,
+        name: device.rawName, // unfiltered device name to show to the user
+        mediaSource: device.mediaSource,
+      };
+    });
+
+    if (
+      constraints.video &&
+      !sources.some(source => source.type === "videoinput")
+    ) {
+      console.error("Media device error: no video source");
+      return null;
+    } else if (
+      constraints.audio &&
+      !sources.some(source => source.type === "audioinput")
+    ) {
+      console.error("Media device error: no audio source");
+      return null;
+    }
+
+    const response = await this.getActor(window).getMediaPermission({
+      uri: window.document.documentURI,
+      video: constraints.video
+        ? sources.filter(source => source.type === "videoinput")
+        : null,
+      audio: constraints.audio
+        ? sources.filter(source => source.type === "audioinput")
+        : null,
+    });
+
+    if (!response) {
+      // Rejected.
+      return null;
+    }
+
+    const allowedDevices = Cc["@mozilla.org/array;1"].createInstance(
+      Ci.nsIMutableArray
+    );
+    if (constraints.video) {
+      const video = devices.find(device => response.video === device.rawId);
+      if (!video) {
+        console.error("Media device error: invalid video id");
+        return null;
+      }
+      await this.getActor(window).addCameraPermission();
+      allowedDevices.appendElement(video);
+    }
+    if (constraints.audio) {
+      const audio = devices.find(device => response.audio === device.rawId);
+      if (!audio) {
+        console.error("Media device error: invalid audio id");
+        return null;
+      }
+      allowedDevices.appendElement(audio);
+    }
+    return allowedDevices;
+  }
+}
+
+const { debug, warn } = GeckoViewUtils.initLogging(
+  "GeckoViewPermissionProcessChild"
+);
diff --git a/mobile/android/actors/GeckoViewPermissionProcessParent.sys.mjs b/mobile/android/actors/GeckoViewPermissionProcessParent.sys.mjs
new file mode 100644
index 0000000000..47b98602a5
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPermissionProcessParent.sys.mjs
@@ -0,0 +1,56 @@
+/* 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";
+
+// See: http://developer.android.com/reference/android/Manifest.permission.html
+const PERM_CAMERA = "android.permission.CAMERA";
+const PERM_RECORD_AUDIO = "android.permission.RECORD_AUDIO";
+
+export class GeckoViewPermissionProcessParent extends JSProcessActorParent {
+  async askDevicePermission(aType) {
+    const perms = [];
+    if (aType === "video" || aType === "all") {
+      perms.push(PERM_CAMERA);
+    }
+    if (aType === "audio" || aType === "all") {
+      perms.push(PERM_RECORD_AUDIO);
+    }
+
+    try {
+      // This looks sketchy but it's fine: Android needs the audio/video
+      // permission to enumerate devices, which Gecko wants to do even before
+      // we expose the list to web pages.
+      // So really it doesn't matter what the request source is, because we
+      // will, separately, issue a windowId-specific request to let the webpage
+      // actually have access to the list of devices. So even if the source of
+      // *this* request is incorrect, no actual harm will be done, as the user
+      // will always receive the request with the right origin after this.
+      const window = Services.wm.getMostRecentWindow("navigator:geckoview");
+      const windowActor = window.browsingContext.currentWindowGlobal.getActor(
+        "GeckoViewPermission"
+      );
+      await windowActor.getAppPermissions(perms);
+    } catch (error) {
+      // We can't really do anything here so we pretend we got the permission.
+      warn`Error getting app permission: ${error}`;
+    }
+  }
+
+  receiveMessage(aMessage) {
+    debug`receiveMessage ${aMessage.name}`;
+
+    switch (aMessage.name) {
+      case "AskDevicePermission": {
+        return this.askDevicePermission(aMessage.data);
+      }
+    }
+
+    return super.receiveMessage(aMessage);
+  }
+}
+
+const { debug, warn } = GeckoViewUtils.initLogging(
+  "GeckoViewPermissionProcess"
+);
diff --git a/mobile/android/actors/GeckoViewPrintDelegateChild.sys.mjs b/mobile/android/actors/GeckoViewPrintDelegateChild.sys.mjs
new file mode 100644
index 0000000000..4004ffa779
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPrintDelegateChild.sys.mjs
@@ -0,0 +1,7 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class GeckoViewPrintDelegateChild extends GeckoViewActorChild {}
diff --git a/mobile/android/actors/GeckoViewPrintDelegateParent.sys.mjs b/mobile/android/actors/GeckoViewPrintDelegateParent.sys.mjs
new file mode 100644
index 0000000000..db2edf652b
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPrintDelegateParent.sys.mjs
@@ -0,0 +1,35 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+export class GeckoViewPrintDelegateParent extends GeckoViewActorParent {
+  constructor() {
+    super();
+    this._browserStaticClone = null;
+  }
+
+  set browserStaticClone(staticClone) {
+    this._browserStaticClone = staticClone;
+  }
+
+  get browserStaticClone() {
+    return this._browserStaticClone;
+  }
+
+  clearStaticClone() {
+    // Removes static browser element from DOM that was made for window.print
+    this.browserStaticClone?.remove();
+    this.browserStaticClone = null;
+  }
+
+  printRequest() {
+    if (this.browserStaticClone != null) {
+      this.eventDispatcher.sendRequest({
+        type: "GeckoView:DotPrintRequest",
+        canonicalBrowsingContextId: this.browserStaticClone.browsingContext.id,
+      });
+    }
+  }
+}
diff --git a/mobile/android/actors/GeckoViewPromptChild.sys.mjs b/mobile/android/actors/GeckoViewPromptChild.sys.mjs
new file mode 100644
index 0000000000..7e5574a7c0
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPromptChild.sys.mjs
@@ -0,0 +1,24 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class GeckoViewPromptChild extends GeckoViewActorChild {
+  handleEvent(event) {
+    const { type } = event;
+    debug`handleEvent: ${type}`;
+
+    switch (type) {
+      case "MozOpenDateTimePicker":
+      case "mozshowdropdown":
+      case "mozshowdropdown-sourcetouch":
+      case "click":
+      case "contextmenu":
+      case "DOMPopupBlocked":
+        Services.prompt.wrappedJSObject.handleEvent(event);
+    }
+  }
+}
+
+const { debug, warn } = GeckoViewPromptChild.initLogging("GeckoViewPrompt");
diff --git a/mobile/android/actors/GeckoViewPrompterChild.sys.mjs b/mobile/android/actors/GeckoViewPrompterChild.sys.mjs
new file mode 100644
index 0000000000..bb8c4fbcff
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPrompterChild.sys.mjs
@@ -0,0 +1,94 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class GeckoViewPrompterChild extends GeckoViewActorChild {
+  constructor() {
+    super();
+    this._prompts = new Map();
+  }
+
+  dismissPrompt(prompt) {
+    this.eventDispatcher.sendRequest({
+      type: "GeckoView:Prompt:Dismiss",
+      id: prompt.id,
+    });
+    this.unregisterPrompt(prompt);
+  }
+
+  updatePrompt(message) {
+    this.eventDispatcher.sendRequest({
+      type: "GeckoView:Prompt:Update",
+      prompt: message,
+    });
+  }
+
+  unregisterPrompt(prompt) {
+    this._prompts.delete(prompt.id);
+    this.sendAsyncMessage("UnregisterPrompt", {
+      id: prompt.id,
+    });
+  }
+
+  prompt(prompt, message) {
+    this._prompts.set(prompt.id, prompt);
+    this.sendAsyncMessage("RegisterPrompt", {
+      id: prompt.id,
+      promptType: prompt.getPromptType(),
+    });
+    // We intentionally do not await here as we want to fire NotifyPromptShow
+    // immediately rather than waiting until the user accepts/dismisses the
+    // prompt.
+    const result = this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:Prompt",
+      prompt: message,
+    });
+    this.sendAsyncMessage("NotifyPromptShow", {
+      id: prompt.id,
+    });
+    return result;
+  }
+
+  /**
+   * Handles the message coming from GeckoViewPrompterParent.
+   *
+   * @param   {string} message.name The subject of the message.
+   * @param   {object} message.data The data of the message.
+   */
+  async receiveMessage({ name, data }) {
+    const prompt = this._prompts.get(data.id);
+    if (!prompt) {
+      // Unknown prompt, probably for a different child actor.
+      return;
+    }
+    switch (name) {
+      case "GetPromptText": {
+        // eslint-disable-next-line consistent-return
+        return prompt.getPromptText();
+      }
+      case "GetInputText": {
+        // eslint-disable-next-line consistent-return
+        return prompt.getInputText();
+      }
+      case "SetInputText": {
+        prompt.setInputText(data.text);
+        break;
+      }
+      case "AcceptPrompt": {
+        prompt.accept();
+        break;
+      }
+      case "DismissPrompt": {
+        prompt.dismiss();
+        break;
+      }
+      default: {
+        break;
+      }
+    }
+  }
+}
+
+const { debug, warn } = GeckoViewPrompterChild.initLogging("Prompter");
diff --git a/mobile/android/actors/GeckoViewPrompterParent.sys.mjs b/mobile/android/actors/GeckoViewPrompterParent.sys.mjs
new file mode 100644
index 0000000000..53eda226c8
--- /dev/null
+++ b/mobile/android/actors/GeckoViewPrompterParent.sys.mjs
@@ -0,0 +1,167 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+const DIALOGS = [
+  "alert",
+  "alertCheck",
+  "confirm",
+  "confirmCheck",
+  "prompt",
+  "promptCheck",
+];
+
+export class GeckoViewPrompterParent extends GeckoViewActorParent {
+  constructor() {
+    super();
+    this._prompts = new Map();
+  }
+
+  get rootActor() {
+    return this.browsingContext.top.currentWindowGlobal.getActor(
+      "GeckoViewPrompter"
+    );
+  }
+
+  registerPrompt(promptId, promptType, actor) {
+    return this._prompts.set(
+      promptId,
+      new RemotePrompt(promptId, promptType, actor)
+    );
+  }
+
+  unregisterPrompt(promptId) {
+    this._prompts.delete(promptId);
+  }
+
+  notifyPromptShow(promptId) {
+    // ToDo: Bug 1761480 - GeckoView can send additional prompts to Marionette
+    if (this._prompts.get(promptId).isDialog) {
+      Services.obs.notifyObservers({ id: promptId }, "geckoview-prompt-show");
+    }
+  }
+
+  getPrompts() {
+    const self = this;
+    const prompts = [];
+    // Marionette expects this event to be fired from the parent
+    const createDialogClosedEvent = detail =>
+      new CustomEvent("DOMModalDialogClosed", {
+        cancelable: true,
+        bubbles: true,
+        detail,
+      });
+
+    for (const [, prompt] of this._prompts) {
+      // Adding only WebDriver compliant dialogs to the window
+      if (prompt.isDialog) {
+        prompts.push({
+          args: {
+            modalType: "GeckoViewPrompter",
+            promptType: prompt.type,
+            isDialog: prompt.isDialog,
+          },
+          setInputText(text) {
+            prompt.inputText = text;
+            prompt.setInputText(text);
+          },
+          async getPromptText() {
+            return prompt.getPromptText();
+          },
+          async getInputText() {
+            return prompt.getInputText();
+          },
+          acceptPrompt() {
+            prompt.acceptPrompt();
+            self.window.dispatchEvent(
+              createDialogClosedEvent({
+                areLeaving: true,
+                value: prompt.inputText,
+              })
+            );
+          },
+          dismissPrompt() {
+            prompt.dismissPrompt();
+            self.window.dispatchEvent(
+              createDialogClosedEvent({ areLeaving: false })
+            );
+          },
+        });
+      }
+    }
+    return prompts;
+  }
+
+  /**
+   * Handles the message coming from GeckoViewPrompterChild.
+   *
+   * @param   {string} message.name The subject of the message.
+   * @param   {object} message.data The data of the message.
+   */
+  // eslint-disable-next-line consistent-return
+  async receiveMessage({ name, data }) {
+    switch (name) {
+      case "RegisterPrompt": {
+        this.rootActor.registerPrompt(data.id, data.promptType, this);
+        break;
+      }
+      case "UnregisterPrompt": {
+        this.rootActor.unregisterPrompt(data.id);
+        break;
+      }
+      case "NotifyPromptShow": {
+        this.rootActor.notifyPromptShow(data.id);
+        break;
+      }
+      default: {
+        return super.receiveMessage({ name, data });
+      }
+    }
+  }
+}
+
+class RemotePrompt {
+  constructor(id, type, actor) {
+    this.id = id;
+    this.type = type;
+    this.actor = actor;
+  }
+
+  // Checks if the prompt conforms to a WebDriver simple dialog.
+  get isDialog() {
+    return DIALOGS.includes(this.type);
+  }
+
+  getPromptText() {
+    return this.actor.sendQuery("GetPromptText", {
+      id: this.id,
+    });
+  }
+
+  getInputText() {
+    return this.actor.sendQuery("GetInputText", {
+      id: this.id,
+    });
+  }
+
+  setInputText(inputText) {
+    this.actor.sendAsyncMessage("SetInputText", {
+      id: this.id,
+      text: inputText,
+    });
+  }
+
+  acceptPrompt() {
+    this.actor.sendAsyncMessage("AcceptPrompt", {
+      id: this.id,
+    });
+  }
+
+  dismissPrompt() {
+    this.actor.sendAsyncMessage("DismissPrompt", {
+      id: this.id,
+    });
+  }
+}
diff --git a/mobile/android/actors/GeckoViewSettingsChild.sys.mjs b/mobile/android/actors/GeckoViewSettingsChild.sys.mjs
new file mode 100644
index 0000000000..d5e6c01e27
--- /dev/null
+++ b/mobile/android/actors/GeckoViewSettingsChild.sys.mjs
@@ -0,0 +1,26 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+// Handles GeckoView content settings
+export class GeckoViewSettingsChild extends GeckoViewActorChild {
+  receiveMessage(message) {
+    const { name } = message;
+    debug`receiveMessage: ${name}`;
+
+    switch (name) {
+      case "SettingsUpdate": {
+        const settings = message.data;
+
+        if (settings.isPopup) {
+          // Allow web extensions to close their own action popups (bz1612363)
+          this.contentWindow.windowUtils.allowScriptsToClose();
+        }
+      }
+    }
+  }
+}
+
+const { debug, warn } = GeckoViewSettingsChild.initLogging("GeckoViewSettings");
diff --git a/mobile/android/actors/LoadURIDelegateChild.sys.mjs b/mobile/android/actors/LoadURIDelegateChild.sys.mjs
new file mode 100644
index 0000000000..bb54209f0c
--- /dev/null
+++ b/mobile/android/actors/LoadURIDelegateChild.sys.mjs
@@ -0,0 +1,44 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  LoadURIDelegate: "resource://gre/modules/LoadURIDelegate.sys.mjs",
+});
+
+// Implements nsILoadURIDelegate.
+export class LoadURIDelegateChild extends GeckoViewActorChild {
+  // nsILoadURIDelegate.
+  handleLoadError(aUri, aError, aErrorModule) {
+    debug`handleLoadError: uri=${aUri && aUri.spec}
+                             displaySpec=${aUri && aUri.displaySpec}
+                             error=${aError}`;
+    if (aUri && lazy.LoadURIDelegate.isSafeBrowsingError(aError)) {
+      const message = {
+        type: "GeckoView:ContentBlocked",
+        uri: aUri.spec,
+        error: aError,
+      };
+
+      this.eventDispatcher.sendRequest(message);
+    }
+
+    return lazy.LoadURIDelegate.handleLoadError(
+      this.contentWindow,
+      this.eventDispatcher,
+      aUri,
+      aError,
+      aErrorModule
+    );
+  }
+}
+
+LoadURIDelegateChild.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsILoadURIDelegate",
+]);
+
+const { debug, warn } = LoadURIDelegateChild.initLogging("LoadURIDelegate");
diff --git a/mobile/android/actors/LoadURIDelegateParent.sys.mjs b/mobile/android/actors/LoadURIDelegateParent.sys.mjs
new file mode 100644
index 0000000000..0446d7d88a
--- /dev/null
+++ b/mobile/android/actors/LoadURIDelegateParent.sys.mjs
@@ -0,0 +1,8 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+// For this.eventDispatcher in the child
+export class LoadURIDelegateParent extends GeckoViewActorParent {}
diff --git a/mobile/android/actors/MediaControlDelegateChild.sys.mjs b/mobile/android/actors/MediaControlDelegateChild.sys.mjs
new file mode 100644
index 0000000000..1db32b33f0
--- /dev/null
+++ b/mobile/android/actors/MediaControlDelegateChild.sys.mjs
@@ -0,0 +1,59 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  MediaUtils: "resource://gre/modules/MediaUtils.sys.mjs",
+  setTimeout: "resource://gre/modules/Timer.sys.mjs",
+});
+
+export class MediaControlDelegateChild extends GeckoViewActorChild {
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "MozDOMFullscreen:Entered":
+      case "MozDOMFullscreen:Exited":
+        this.handleFullscreenChanged(true);
+        break;
+    }
+  }
+
+  async handleFullscreenChanged(retry) {
+    debug`handleFullscreenChanged`;
+
+    const element = this.document.fullscreenElement;
+    const mediaElement = lazy.MediaUtils.findMediaElement(element);
+
+    if (element && !mediaElement) {
+      // Non-media element fullscreen.
+      debug`No fullscreen media element found.`;
+    }
+
+    const activated = await this.eventDispatcher.sendRequestForResult({
+      type: "GeckoView:MediaSession:Fullscreen",
+      metadata: lazy.MediaUtils.getMetadata(mediaElement) ?? {},
+      enabled: !!element,
+    });
+    if (activated) {
+      return;
+    }
+    if (retry && element) {
+      // When media session is going to active, we have a race condition of
+      // full screen event because media session will be activated by full
+      // screen event.
+      // So we retry to call media session delegate for this situation.
+      lazy.setTimeout(() => {
+        this.handleFullscreenChanged(false);
+      }, 100);
+    }
+  }
+}
+
+const { debug } = MediaControlDelegateChild.initLogging(
+  "MediaControlDelegateChild"
+);
diff --git a/mobile/android/actors/MediaControlDelegateParent.sys.mjs b/mobile/android/actors/MediaControlDelegateParent.sys.mjs
new file mode 100644
index 0000000000..f0c3f47984
--- /dev/null
+++ b/mobile/android/actors/MediaControlDelegateParent.sys.mjs
@@ -0,0 +1,8 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+// For this.eventDispatcher in the child
+export class MediaControlDelegateParent extends GeckoViewActorParent {}
diff --git a/mobile/android/actors/ProgressDelegateChild.sys.mjs b/mobile/android/actors/ProgressDelegateChild.sys.mjs
new file mode 100644
index 0000000000..4992ee5916
--- /dev/null
+++ b/mobile/android/actors/ProgressDelegateChild.sys.mjs
@@ -0,0 +1,26 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class ProgressDelegateChild extends GeckoViewActorChild {
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+    switch (aEvent.type) {
+      case "DOMContentLoaded": // fall-through
+      case "MozAfterPaint": // fall-through
+      case "pageshow": {
+        // Forward to main process
+        const target = aEvent.originalTarget;
+        const uri = target?.location.href;
+        this.sendAsyncMessage(aEvent.type, {
+          uri,
+        });
+      }
+    }
+  }
+}
+
+const { debug, warn } = ProgressDelegateChild.initLogging("ProgressDelegate");
diff --git a/mobile/android/actors/ProgressDelegateParent.sys.mjs b/mobile/android/actors/ProgressDelegateParent.sys.mjs
new file mode 100644
index 0000000000..bb3f1ec416
--- /dev/null
+++ b/mobile/android/actors/ProgressDelegateParent.sys.mjs
@@ -0,0 +1,7 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+export class ProgressDelegateParent extends GeckoViewActorParent {}
diff --git a/mobile/android/actors/ScrollDelegateChild.sys.mjs b/mobile/android/actors/ScrollDelegateChild.sys.mjs
new file mode 100644
index 0000000000..5d71482f23
--- /dev/null
+++ b/mobile/android/actors/ScrollDelegateChild.sys.mjs
@@ -0,0 +1,31 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class ScrollDelegateChild extends GeckoViewActorChild {
+  // eslint-disable-next-line complexity
+  handleEvent(aEvent) {
+    if (aEvent.originalTarget.ownerGlobal != this.contentWindow) {
+      return;
+    }
+
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "mozvisualscroll":
+        const x = {};
+        const y = {};
+        this.contentWindow.windowUtils.getVisualViewportOffset(x, y);
+        this.eventDispatcher.sendRequest({
+          type: "GeckoView:ScrollChanged",
+          scrollX: x.value,
+          scrollY: y.value,
+        });
+        break;
+    }
+  }
+}
+
+const { debug, warn } = ScrollDelegateChild.initLogging("ScrollDelegate");
diff --git a/mobile/android/actors/ScrollDelegateParent.sys.mjs b/mobile/android/actors/ScrollDelegateParent.sys.mjs
new file mode 100644
index 0000000000..39921d4411
--- /dev/null
+++ b/mobile/android/actors/ScrollDelegateParent.sys.mjs
@@ -0,0 +1,8 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+// For this.eventDispatcher in the child
+export class ScrollDelegateParent extends GeckoViewActorParent {}
diff --git a/mobile/android/actors/SelectionActionDelegateChild.sys.mjs b/mobile/android/actors/SelectionActionDelegateChild.sys.mjs
new file mode 100644
index 0000000000..9f05906e09
--- /dev/null
+++ b/mobile/android/actors/SelectionActionDelegateChild.sys.mjs
@@ -0,0 +1,442 @@
+/* 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 { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  LayoutUtils: "resource://gre/modules/LayoutUtils.sys.mjs",
+});
+
+const MAGNIFIER_PREF = "layout.accessiblecaret.magnifier.enabled";
+const ACCESSIBLECARET_HEIGHT_PREF = "layout.accessiblecaret.height";
+const PREFS = [MAGNIFIER_PREF, ACCESSIBLECARET_HEIGHT_PREF];
+
+// Dispatches GeckoView:ShowSelectionAction and GeckoView:HideSelectionAction to
+// the GeckoSession on accessible caret changes.
+export class SelectionActionDelegateChild extends GeckoViewActorChild {
+  constructor(aModuleName, aMessageManager) {
+    super(aModuleName, aMessageManager);
+
+    this._actionCallback = () => {};
+    this._isActive = false;
+    this._previousMessage = "";
+
+    // Bug 1570744 - JSWindowActorChild's cannot be used as nsIObserver's
+    // directly, so we create a new function here instead to act as our
+    // nsIObserver, which forwards the notification to the observe method.
+    this._observerFunction = (subject, topic, data) => {
+      this.observe(subject, topic, data);
+    };
+    for (const pref of PREFS) {
+      Services.prefs.addObserver(pref, this._observerFunction);
+    }
+
+    this._magnifierEnabled = Services.prefs.getBoolPref(MAGNIFIER_PREF);
+    this._accessiblecaretHeight = parseFloat(
+      Services.prefs.getCharPref(ACCESSIBLECARET_HEIGHT_PREF, "0")
+    );
+  }
+
+  didDestroy() {
+    for (const pref of PREFS) {
+      Services.prefs.removeObserver(pref, this._observerFunction);
+    }
+  }
+
+  _actions = [
+    {
+      id: "org.mozilla.geckoview.HIDE",
+      predicate: _ => true,
+      perform: _ => this.handleEvent({ type: "pagehide" }),
+    },
+    {
+      id: "org.mozilla.geckoview.CUT",
+      predicate: e =>
+        !e.collapsed && e.selectionEditable && !this._isPasswordField(e),
+      perform: _ => this.docShell.doCommand("cmd_cut"),
+    },
+    {
+      id: "org.mozilla.geckoview.COPY",
+      predicate: e => !e.collapsed && !this._isPasswordField(e),
+      perform: _ => this.docShell.doCommand("cmd_copy"),
+    },
+    {
+      id: "org.mozilla.geckoview.PASTE",
+      predicate: e =>
+        (this._isContentHtmlEditable(e) &&
+          Services.clipboard.hasDataMatchingFlavors(
+            /* The following image types are considered by editor */
+            ["image/gif", "image/jpeg", "image/png"],
+            Ci.nsIClipboard.kGlobalClipboard
+          )) ||
+        (e.selectionEditable &&
+          Services.clipboard.hasDataMatchingFlavors(
+            ["text/plain"],
+            Ci.nsIClipboard.kGlobalClipboard
+          )),
+      perform: _ => this._performPaste(),
+    },
+    {
+      id: "org.mozilla.geckoview.PASTE_AS_PLAIN_TEXT",
+      predicate: e =>
+        this._isContentHtmlEditable(e) &&
+        Services.clipboard.hasDataMatchingFlavors(
+          ["text/html"],
+          Ci.nsIClipboard.kGlobalClipboard
+        ),
+      perform: _ => this._performPasteAsPlainText(),
+    },
+    {
+      id: "org.mozilla.geckoview.DELETE",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: _ => this.docShell.doCommand("cmd_delete"),
+    },
+    {
+      id: "org.mozilla.geckoview.COLLAPSE_TO_START",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_moveLeft"),
+    },
+    {
+      id: "org.mozilla.geckoview.COLLAPSE_TO_END",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_moveRight"),
+    },
+    {
+      id: "org.mozilla.geckoview.UNSELECT",
+      predicate: e => !e.collapsed && !e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_selectNone"),
+    },
+    {
+      id: "org.mozilla.geckoview.SELECT_ALL",
+      predicate: e => {
+        if (e.reason === "longpressonemptycontent") {
+          return false;
+        }
+        // When on design mode, focusedElement will be null.
+        const element =
+          Services.focus.focusedElement || e.target?.activeElement;
+        if (e.selectionEditable && e.target && element) {
+          let value = "";
+          if (element.value) {
+            value = element.value;
+          } else if (
+            element.isContentEditable ||
+            e.target.designMode === "on"
+          ) {
+            value = element.innerText;
+          }
+          // Do not show SELECT_ALL if the editable is empty
+          // or all the editable text is already selected.
+          return value !== "" && value !== e.selectedTextContent;
+        }
+        return true;
+      },
+      perform: e => this.docShell.doCommand("cmd_selectAll"),
+    },
+  ];
+
+  receiveMessage({ name, data }) {
+    debug`receiveMessage ${name}`;
+
+    switch (name) {
+      case "ExecuteSelectionAction": {
+        this._actionCallback(data);
+      }
+    }
+  }
+
+  _performPaste() {
+    this.handleEvent({ type: "pagehide" });
+    this.docShell.doCommand("cmd_paste");
+  }
+
+  _performPasteAsPlainText() {
+    this.handleEvent({ type: "pagehide" });
+    this.docShell.doCommand("cmd_pasteNoFormatting");
+  }
+
+  _isPasswordField(aEvent) {
+    if (!aEvent.selectionEditable) {
+      return false;
+    }
+
+    const win = aEvent.target.defaultView;
+    const focus = aEvent.target.activeElement;
+    return (
+      win &&
+      win.HTMLInputElement &&
+      win.HTMLInputElement.isInstance(focus) &&
+      !focus.mozIsTextField(/* excludePassword */ true)
+    );
+  }
+
+  _isContentHtmlEditable(aEvent) {
+    if (!aEvent.selectionEditable) {
+      return false;
+    }
+
+    if (aEvent.target.designMode == "on") {
+      return true;
+    }
+
+    // focused element isn't <input> nor <textarea>
+    const win = aEvent.target.defaultView;
+    const focus = Services.focus.focusedElement;
+    return (
+      win &&
+      win.HTMLInputElement &&
+      win.HTMLTextAreaElement &&
+      !win.HTMLInputElement.isInstance(focus) &&
+      !win.HTMLTextAreaElement.isInstance(focus)
+    );
+  }
+
+  _getDefaultMagnifierPoint(aEvent) {
+    const rect = lazy.LayoutUtils.rectToScreenRect(aEvent.target.ownerGlobal, {
+      left: aEvent.clientX,
+      top: aEvent.clientY - this._accessiblecaretHeight,
+      width: 0,
+      height: 0,
+    });
+    return { x: rect.left, y: rect.top };
+  }
+
+  _getBetterMagnifierPoint(aEvent) {
+    const win = aEvent.target.defaultView;
+    if (!win) {
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    const focus = aEvent.target.activeElement;
+    if (
+      win.HTMLInputElement?.isInstance(focus) &&
+      focus.mozIsTextField(false)
+    ) {
+      // <input> element. Use vertical center position of input element.
+      const bounds = focus.getBoundingClientRect();
+      const rect = lazy.LayoutUtils.rectToScreenRect(
+        aEvent.target.ownerGlobal,
+        {
+          left: aEvent.clientX,
+          top: bounds.top,
+          width: 0,
+          height: bounds.height,
+        }
+      );
+      return { x: rect.left, y: rect.top + rect.height / 2 };
+    }
+
+    if (win.HTMLTextAreaElement?.isInstance(focus)) {
+      // TODO:
+      // <textarea> element. How to get better selection bounds?
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    const selection = win.getSelection();
+    if (selection.rangeCount != 1) {
+      // When selecting text using accessible caret, selection count will be 1.
+      // This situation means that current selection isn't into text.
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    // We are looking for better selection bounds, then use it.
+    const bounds = (() => {
+      const range = selection.getRangeAt(0);
+      let distance = Number.MAX_SAFE_INTEGER;
+      let y = aEvent.clientY;
+      const rectList = range.getClientRects();
+      for (const rect of rectList) {
+        const newDistance = Math.abs(aEvent.clientY - rect.bottom);
+        if (distance > newDistance) {
+          y = rect.top + rect.height / 2;
+          distance = newDistance;
+        }
+      }
+      return { left: aEvent.clientX, top: y, width: 0, height: 0 };
+    })();
+
+    const rect = lazy.LayoutUtils.rectToScreenRect(
+      aEvent.target.ownerGlobal,
+      bounds
+    );
+    return { x: rect.left, y: rect.top };
+  }
+
+  _handleMagnifier(aEvent) {
+    if (["presscaret", "dragcaret"].includes(aEvent.reason)) {
+      debug`_handleMagnifier: ${aEvent.reason}`;
+      const screenPoint = this._getBetterMagnifierPoint(aEvent);
+      this.eventDispatcher.sendRequest({
+        type: "GeckoView:ShowMagnifier",
+        screenPoint,
+      });
+    } else if (aEvent.reason == "releasecaret") {
+      debug`_handleMagnifier: ${aEvent.reason}`;
+      this.eventDispatcher.sendRequest({
+        type: "GeckoView:HideMagnifier",
+      });
+    }
+  }
+
+  /**
+   * Receive and act on AccessibleCarets caret state-change
+   * (mozcaretstatechanged and pagehide) events.
+   */
+  handleEvent(aEvent) {
+    if (aEvent.type === "pagehide" || aEvent.type === "deactivate") {
+      // Hide any selection actions on page hide or deactivate.
+      aEvent = {
+        reason: "visibilitychange",
+        caretVisibile: false,
+        selectionVisible: false,
+        collapsed: true,
+        selectionEditable: false,
+      };
+    }
+
+    let reason = aEvent.reason;
+
+    if (this._isActive && !aEvent.caretVisible) {
+      // For mozcaretstatechanged, "visibilitychange" means the caret is hidden.
+      reason = "visibilitychange";
+    } else if (!aEvent.collapsed && !aEvent.selectionVisible) {
+      reason = "invisibleselection";
+    } else if (
+      !this._isActive &&
+      aEvent.selectionEditable &&
+      aEvent.collapsed &&
+      reason !== "longpressonemptycontent" &&
+      reason !== "taponcaret" &&
+      !Services.prefs.getBoolPref(
+        "geckoview.selection_action.show_on_focus",
+        false
+      )
+    ) {
+      // Don't show selection actions when merely focusing on an editor or
+      // repositioning the cursor. Wait until long press or the caret is tapped
+      // in order to match Android behavior.
+      reason = "visibilitychange";
+    }
+
+    debug`handleEvent: ${reason}`;
+
+    if (this._magnifierEnabled) {
+      this._handleMagnifier(aEvent);
+    }
+
+    if (
+      [
+        "longpressonemptycontent",
+        "releasecaret",
+        "taponcaret",
+        "updateposition",
+      ].includes(reason)
+    ) {
+      const actions = this._actions.filter(action =>
+        action.predicate.call(this, aEvent)
+      );
+
+      const screenRect = (() => {
+        const boundingRect = aEvent.boundingClientRect;
+        if (!boundingRect) {
+          return null;
+        }
+        const rect = lazy.LayoutUtils.rectToScreenRect(
+          aEvent.target.ownerGlobal,
+          boundingRect
+        );
+        return {
+          left: rect.left,
+          top: rect.top,
+          right: rect.right,
+          bottom: rect.bottom + this._accessiblecaretHeight,
+        };
+      })();
+
+      const password = this._isPasswordField(aEvent);
+
+      const msg = {
+        collapsed: aEvent.collapsed,
+        editable: aEvent.selectionEditable,
+        password,
+        selection: password ? "" : aEvent.selectedTextContent,
+        screenRect,
+        actions: actions.map(action => action.id),
+      };
+
+      if (this._isActive && JSON.stringify(msg) === this._previousMessage) {
+        // Don't call again if we're already active and things haven't changed.
+        return;
+      }
+
+      this._isActive = true;
+      this._previousMessage = JSON.stringify(msg);
+
+      // We can't just listen to the response of the message because we accept
+      // multiple callbacks.
+      this._actionCallback = data => {
+        const action = actions.find(action => action.id === data.id);
+        if (action) {
+          debug`Performing ${data.id}`;
+          action.perform.call(this, aEvent);
+        } else {
+          warn`Invalid action ${data.id}`;
+        }
+      };
+      this.sendAsyncMessage("ShowSelectionAction", msg);
+    } else if (
+      [
+        "invisibleselection",
+        "presscaret",
+        "scroll",
+        "visibilitychange",
+      ].includes(reason)
+    ) {
+      if (!this._isActive) {
+        return;
+      }
+      this._isActive = false;
+
+      // Mark previous actions as stale. Don't do this for "invisibleselection"
+      // or "scroll" because previous actions should still be valid even after
+      // these events occur.
+      if (reason !== "invisibleselection" && reason !== "scroll") {
+        this._seqNo++;
+      }
+
+      this.sendAsyncMessage("HideSelectionAction", { reason });
+    } else if (reason == "dragcaret") {
+      // nothing for selection action
+    } else {
+      warn`Unknown reason: ${reason}`;
+    }
+  }
+
+  observe(aSubject, aTopic, aData) {
+    if (aTopic != "nsPref:changed") {
+      return;
+    }
+
+    switch (aData) {
+      case ACCESSIBLECARET_HEIGHT_PREF:
+        this._accessiblecaretHeight = parseFloat(
+          Services.prefs.getCharPref(ACCESSIBLECARET_HEIGHT_PREF, "0")
+        );
+        break;
+      case MAGNIFIER_PREF:
+        this._magnifierEnabled = Services.prefs.getBoolPref(MAGNIFIER_PREF);
+        break;
+    }
+    // Reset magnifier
+    this.eventDispatcher.sendRequest({
+      type: "GeckoView:HideMagnifier",
+    });
+  }
+}
+
+const { debug, warn } = SelectionActionDelegateChild.initLogging(
+  "SelectionActionDelegate"
+);
diff --git a/mobile/android/actors/SelectionActionDelegateParent.sys.mjs b/mobile/android/actors/SelectionActionDelegateParent.sys.mjs
new file mode 100644
index 0000000000..3ef5830ce4
--- /dev/null
+++ b/mobile/android/actors/SelectionActionDelegateParent.sys.mjs
@@ -0,0 +1,72 @@
+/* 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 { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+export class SelectionActionDelegateParent extends GeckoViewActorParent {
+  respondTo = null;
+  actionId = null;
+
+  get rootActor() {
+    return this.browsingContext.top.currentWindowGlobal.getActor(
+      "SelectionActionDelegate"
+    );
+  }
+
+  receiveMessage(aMessage) {
+    const { data, name } = aMessage;
+    switch (name) {
+      case "ShowSelectionAction": {
+        this.rootActor.showSelectionAction(this, data);
+        break;
+      }
+
+      case "HideSelectionAction": {
+        this.rootActor.hideSelectionAction(this, data.reason);
+        break;
+      }
+
+      default: {
+        super.receiveMessage(aMessage);
+      }
+    }
+  }
+
+  hideSelectionAction(aRespondTo, reason) {
+    // Mark previous actions as stale. Don't do this for "invisibleselection"
+    // or "scroll" because previous actions should still be valid even after
+    // these events occur.
+    if (reason !== "invisibleselection" && reason !== "scroll") {
+      this.actionId = null;
+    }
+
+    this.eventDispatcher?.sendRequest({
+      type: "GeckoView:HideSelectionAction",
+      reason,
+    });
+  }
+
+  showSelectionAction(aRespondTo, aData) {
+    this.actionId = Services.uuid.generateUUID().toString();
+    this.respondTo = aRespondTo;
+
+    this.eventDispatcher?.sendRequest({
+      type: "GeckoView:ShowSelectionAction",
+      actionId: this.actionId,
+      ...aData,
+    });
+  }
+
+  executeSelectionAction(aData) {
+    if (this.actionId === null || aData.actionId != this.actionId) {
+      warn`Stale response ${aData.id} ${aData.actionId}`;
+      return;
+    }
+    this.respondTo.sendAsyncMessage("ExecuteSelectionAction", aData);
+  }
+}
+
+const { debug, warn } = SelectionActionDelegateParent.initLogging(
+  "SelectionActionDelegate"
+);
diff --git a/mobile/android/actors/metrics.yaml b/mobile/android/actors/metrics.yaml
new file mode 100644
index 0000000000..636292100c
--- /dev/null
+++ b/mobile/android/actors/metrics.yaml
@@ -0,0 +1,11 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Adding a new metric? We have docs for that!
+# https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html
+
+---
+$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
+$tags:
+  - 'GeckoView :: General'
diff --git a/mobile/android/actors/moz.build b/mobile/android/actors/moz.build
new file mode 100644
index 0000000000..739405e56c
--- /dev/null
+++ b/mobile/android/actors/moz.build
@@ -0,0 +1,39 @@
+# 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/.
+
+with Files("**"):
+    BUG_COMPONENT = ("GeckoView", "General")
+
+FINAL_TARGET_FILES.actors += [
+    "ContentDelegateChild.sys.mjs",
+    "ContentDelegateParent.sys.mjs",
+    "GeckoViewAutoFillChild.sys.mjs",
+    "GeckoViewAutoFillParent.sys.mjs",
+    "GeckoViewContentChild.sys.mjs",
+    "GeckoViewContentParent.sys.mjs",
+    "GeckoViewExperimentDelegateParent.sys.mjs",
+    "GeckoViewFormValidationChild.sys.mjs",
+    "GeckoViewPermissionChild.sys.mjs",
+    "GeckoViewPermissionParent.sys.mjs",
+    "GeckoViewPermissionProcessChild.sys.mjs",
+    "GeckoViewPermissionProcessParent.sys.mjs",
+    "GeckoViewPrintDelegateChild.sys.mjs",
+    "GeckoViewPrintDelegateParent.sys.mjs",
+    "GeckoViewPromptChild.sys.mjs",
+    "GeckoViewPrompterChild.sys.mjs",
+    "GeckoViewPrompterParent.sys.mjs",
+    "GeckoViewSettingsChild.sys.mjs",
+    "LoadURIDelegateChild.sys.mjs",
+    "LoadURIDelegateParent.sys.mjs",
+    "MediaControlDelegateChild.sys.mjs",
+    "MediaControlDelegateParent.sys.mjs",
+    "ProgressDelegateChild.sys.mjs",
+    "ProgressDelegateParent.sys.mjs",
+    "ScrollDelegateChild.sys.mjs",
+    "ScrollDelegateParent.sys.mjs",
+    "SelectionActionDelegateChild.sys.mjs",
+    "SelectionActionDelegateParent.sys.mjs",
+]
+
+MOCHITEST_MANIFESTS += ["tests/mochitests/mochitest.toml"]
diff --git a/mobile/android/actors/tests/mochitests/head.js b/mobile/android/actors/tests/mochitests/head.js
new file mode 100644
index 0000000000..66735cddb6
--- /dev/null
+++ b/mobile/android/actors/tests/mochitests/head.js
@@ -0,0 +1,5 @@
+/* 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";
diff --git a/mobile/android/actors/tests/mochitests/mochitest.toml b/mobile/android/actors/tests/mochitests/mochitest.toml
new file mode 100644
index 0000000000..10fb8342b4
--- /dev/null
+++ b/mobile/android/actors/tests/mochitests/mochitest.toml
@@ -0,0 +1,5 @@
+[DEFAULT]
+support-files = ["head.js"]
+run-if = ["os == 'android'"]
+
+["test_geckoview_experiment_delegate.html"]
diff --git a/mobile/android/actors/tests/mochitests/test_geckoview_experiment_delegate.html b/mobile/android/actors/tests/mochitests/test_geckoview_experiment_delegate.html
new file mode 100644
index 0000000000..c6425e2983
--- /dev/null
+++ b/mobile/android/actors/tests/mochitests/test_geckoview_experiment_delegate.html
@@ -0,0 +1,108 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1845824
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test Experiment Delegate</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="head.js" type="application/javascript"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<script class="testbody" type="text/javascript">
+
+  // Note: TestRunnerActivity provides a pseudo Experiment Delegate for this test.
+  async function requestExperiment(message) {
+    const chromeScript = SpecialPowers.loadChromeScript(_ => {
+      /* eslint-env mozilla/chrome-script */
+      addMessageListener("experiment", (msg) => {
+        var result;
+        const navigator = Services.wm.getMostRecentWindow("navigator:geckoview");
+        const experimentActor = navigator.window.moduleManager.getActor("GeckoViewExperimentDelegate");
+        switch (msg.endpoint) {
+          case 'getExperimentFeature':
+            result = experimentActor.getExperimentFeature(msg.feature);
+            break;
+          case 'recordExposure':
+            result = experimentActor.recordExposure(msg.feature);
+            break
+          case 'recordExperimentExposure':
+            result = experimentActor.recordExperimentExposure(msg.feature, msg.slug);
+            break;
+          case 'recordExperimentMalformedConfig':
+            result = experimentActor.recordExperimentMalformedConfig(msg.feature, msg.part);
+            break;
+          default:
+            result = null;
+            break;
+        }
+        return result;
+      });
+
+    });
+
+    const result = await chromeScript.sendQuery("experiment", message);
+    chromeScript.destroy();
+    return result;
+  }
+
+  add_task(async function test_getExperimentFeature() {
+     const success = await requestExperiment({endpoint: "getExperimentFeature", feature: "test"});
+     is(success["item-one"], true, "Retrieved TestRunnerActivity experiment feature 'test' for 'item-one'.");
+     is(success["item-two"], 5, "Retrieved TestRunnerActivity experiment feature 'test' for 'item-two'.");
+    var didErrorOccur = false;
+     try {
+      await requestExperiment({endpoint: "getExperimentFeature", feature: "no-feature"});
+    } catch (error) {
+      is(error, "An error occurred while retrieving feature data.", "Correctly failed when the feature did not exist.");
+      didErrorOccur = true;
+    }
+     is(didErrorOccur, true, "Error was caught when no feature existed.");
+  });
+
+  add_task(async function test_recordExposure() {
+     const success = await requestExperiment({endpoint: "recordExposure", feature: "test"});
+     is(success, true, "Recorded exposure for the feature.");
+    var didErrorOccur = false;
+     try {
+      await requestExperiment({endpoint: "recordExposure", feature: "no-feature"});
+    } catch (error) {
+      is(error, "An error occurred while recording feature.", "Correctly failed when the feature did not exist.");
+      didErrorOccur = true;
+    }
+     is(didErrorOccur, true, "Error was caught when no feature existed.");
+  });
+
+
+  add_task(async function test_recordExperimentExposure() {
+     const success = await requestExperiment({endpoint: "recordExperimentExposure", feature: "test", slug: "test"});
+     is(success, true, "Recorded experiment exposure for the feature.");
+    var didErrorOccur = false;
+     try {
+      await requestExperiment({endpoint: "recordExperimentExposure", feature: "no-feature", slug: "no-slug"});
+    } catch (error) {
+      is(error, "An error occurred while recording experiment feature.", "Correctly failed when the feature did not exist.");
+      didErrorOccur = true;
+    }
+     is(didErrorOccur, true, "Error was caught when no feature existed.");
+  });
+
+
+  add_task(async function test_recordExperimentMalformedConfig() {
+     const success = await requestExperiment({endpoint: "recordExperimentMalformedConfig", feature: "test", part: "test"});
+     is(success, true, "Recorded exposure for the feature.");
+    var didErrorOccur = false;
+     try {
+      await requestExperiment({endpoint: "recordExperimentMalformedConfig", feature: "no-feature", part:"no-part"});
+    } catch (error) {
+      is(error, "An error occurred while recording malformed feature config.", "Correctly failed when the feature did not exist.");
+      didErrorOccur = true;
+    }
+     is(didErrorOccur, true, "Error was caught when no feature existed.");
+  });
+
+</script>
+</body>
+</html>