Adding upstream version 110.0.1.upstream/110.0.1upstream

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

8 files changed, 1694 insertions, 0 deletions

diff --git a/remote/shared/test/xpcshell/test_AppInfo.js b/remote/shared/test/xpcshell/test_AppInfo.js
new file mode 100644
index 0000000000..d97d0d0cbb
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_AppInfo.js
@@ -0,0 +1,34 @@
+/* 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";
+
+const { AppInfo } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/AppInfo.sys.mjs"
+);
+
+// Minimal xpcshell tests for AppInfo; Services.appinfo.* is not available
+
+add_test(function test_custom_properties() {
+  const properties = [
+    // platforms
+    "isAndroid",
+    "isLinux",
+    "isMac",
+    "isWindows",
+    // applications
+    "isFirefox",
+    "isThunderbird",
+  ];
+
+  for (const prop of properties) {
+    equal(
+      typeof AppInfo[prop],
+      "boolean",
+      `Custom property ${prop} has expected type`
+    );
+  }
+
+  run_next_test();
+});
diff --git a/remote/shared/test/xpcshell/test_Format.js b/remote/shared/test/xpcshell/test_Format.js
new file mode 100644
index 0000000000..40c4afb60f
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_Format.js
@@ -0,0 +1,119 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { truncate, pprint } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/Format.sys.mjs"
+);
+
+const MAX_STRING_LENGTH = 250;
+const HALF = "x".repeat(MAX_STRING_LENGTH / 2);
+
+add_test(function test_pprint() {
+  equal('[object Object] {"foo":"bar"}', pprint`${{ foo: "bar" }}`);
+
+  equal("[object Number] 42", pprint`${42}`);
+  equal("[object Boolean] true", pprint`${true}`);
+  equal("[object Undefined] undefined", pprint`${undefined}`);
+  equal("[object Null] null", pprint`${null}`);
+
+  let complexObj = { toJSON: () => "foo" };
+  equal('[object Object] "foo"', pprint`${complexObj}`);
+
+  let cyclic = {};
+  cyclic.me = cyclic;
+  equal("[object Object] <cyclic object value>", pprint`${cyclic}`);
+
+  let el = {
+    hasAttribute: attr => attr in el,
+    getAttribute: attr => (attr in el ? el[attr] : null),
+    nodeType: 1,
+    localName: "input",
+    id: "foo",
+    class: "a b",
+    href: "#",
+    name: "bar",
+    src: "s",
+    type: "t",
+  };
+  equal(
+    '<input id="foo" class="a b" href="#" name="bar" src="s" type="t">',
+    pprint`${el}`
+  );
+
+  run_next_test();
+});
+
+add_test(function test_truncate_empty() {
+  equal(truncate``, "");
+  run_next_test();
+});
+
+add_test(function test_truncate_noFields() {
+  equal(truncate`foo bar`, "foo bar");
+  run_next_test();
+});
+
+add_test(function test_truncate_multipleFields() {
+  equal(truncate`${0}`, "0");
+  equal(truncate`${1}${2}${3}`, "123");
+  equal(truncate`a${1}b${2}c${3}`, "a1b2c3");
+  run_next_test();
+});
+
+add_test(function test_truncate_primitiveFields() {
+  equal(truncate`${123}`, "123");
+  equal(truncate`${true}`, "true");
+  equal(truncate`${null}`, "");
+  equal(truncate`${undefined}`, "");
+  run_next_test();
+});
+
+add_test(function test_truncate_string() {
+  equal(truncate`${"foo"}`, "foo");
+  equal(truncate`${"x".repeat(250)}`, "x".repeat(250));
+  equal(truncate`${"x".repeat(260)}`, `${HALF} ... ${HALF}`);
+  run_next_test();
+});
+
+add_test(function test_truncate_array() {
+  equal(truncate`${["foo"]}`, JSON.stringify(["foo"]));
+  equal(truncate`${"foo"} ${["bar"]}`, `foo ${JSON.stringify(["bar"])}`);
+  equal(
+    truncate`${["x".repeat(260)]}`,
+    JSON.stringify([`${HALF} ... ${HALF}`])
+  );
+
+  run_next_test();
+});
+
+add_test(function test_truncate_object() {
+  equal(truncate`${{}}`, JSON.stringify({}));
+  equal(truncate`${{ foo: "bar" }}`, JSON.stringify({ foo: "bar" }));
+  equal(
+    truncate`${{ foo: "x".repeat(260) }}`,
+    JSON.stringify({ foo: `${HALF} ... ${HALF}` })
+  );
+  equal(truncate`${{ foo: ["bar"] }}`, JSON.stringify({ foo: ["bar"] }));
+  equal(
+    truncate`${{ foo: ["bar", { baz: 42 }] }}`,
+    JSON.stringify({ foo: ["bar", { baz: 42 }] })
+  );
+
+  let complex = {
+    toString() {
+      return "hello world";
+    },
+  };
+  equal(truncate`${complex}`, "hello world");
+
+  let longComplex = {
+    toString() {
+      return "x".repeat(260);
+    },
+  };
+  equal(truncate`${longComplex}`, `${HALF} ... ${HALF}`);
+
+  run_next_test();
+});
diff --git a/remote/shared/test/xpcshell/test_Navigate.js b/remote/shared/test/xpcshell/test_Navigate.js
new file mode 100644
index 0000000000..e85d71d307
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_Navigate.js
@@ -0,0 +1,850 @@
+/* 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/. */
+
+const { setTimeout } = ChromeUtils.importESModule(
+  "resource://gre/modules/Timer.sys.mjs"
+);
+
+const {
+  ProgressListener,
+  waitForInitialNavigationCompleted,
+} = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/Navigate.sys.mjs"
+);
+
+const CURRENT_URI = Services.io.newURI("http://foo.bar/");
+const INITIAL_URI = Services.io.newURI("about:blank");
+const TARGET_URI = Services.io.newURI("http://foo.cheese/");
+const TARGET_URI_IS_ERROR_PAGE = Services.io.newURI("doesnotexist://");
+const TARGET_URI_WITH_HASH = Services.io.newURI("http://foo.cheese/#foo");
+
+class MockRequest {
+  constructor(uri) {
+    this.originalURI = uri;
+  }
+
+  get QueryInterface() {
+    return ChromeUtils.generateQI(["nsIRequest", "nsIChannel"]);
+  }
+}
+
+class MockWebProgress {
+  constructor(browsingContext) {
+    this.browsingContext = browsingContext;
+
+    this.documentRequest = null;
+    this.isLoadingDocument = false;
+    this.listener = null;
+    this.progressListenerRemoved = false;
+  }
+
+  addProgressListener(listener) {
+    if (this.listener) {
+      throw new Error("Cannot register listener twice");
+    }
+
+    this.listener = listener;
+  }
+
+  removeProgressListener(listener) {
+    if (listener === this.listener) {
+      this.listener = null;
+      this.progressListenerRemoved = true;
+    } else {
+      throw new Error("Unknown listener");
+    }
+  }
+
+  sendLocationChange(options = {}) {
+    const { flag = 0 } = options;
+
+    this.documentRequest = null;
+
+    if (flag & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT) {
+      this.browsingContext.currentURI = TARGET_URI_WITH_HASH;
+    } else if (flag & Ci.nsIWebProgressListener.LOCATION_CHANGE_ERROR_PAGE) {
+      this.browsingContext.currentURI = TARGET_URI_IS_ERROR_PAGE;
+    }
+
+    this.listener?.onLocationChange(
+      this,
+      this.documentRequest,
+      TARGET_URI_WITH_HASH,
+      flag
+    );
+
+    return new Promise(executeSoon);
+  }
+
+  sendStartState(options = {}) {
+    const { coop = false, isInitial = false } = options;
+
+    if (coop) {
+      this.browsingContext = new MockTopContext(this);
+    }
+
+    if (!this.browsingContext.currentWindowGlobal) {
+      this.browsingContext.currentWindowGlobal = {};
+    }
+
+    this.browsingContext.currentWindowGlobal.isInitialDocument = isInitial;
+
+    this.isLoadingDocument = true;
+    const uri = isInitial ? INITIAL_URI : TARGET_URI;
+    this.documentRequest = new MockRequest(uri);
+
+    this.listener?.onStateChange(
+      this,
+      this.documentRequest,
+      Ci.nsIWebProgressListener.STATE_START,
+      null
+    );
+
+    return new Promise(executeSoon);
+  }
+
+  sendStopState(options = {}) {
+    const { errorFlag = 0 } = options;
+
+    this.browsingContext.currentURI = this.documentRequest.originalURI;
+
+    this.isLoadingDocument = false;
+    this.documentRequest = null;
+
+    this.listener?.onStateChange(
+      this,
+      this.documentRequest,
+      Ci.nsIWebProgressListener.STATE_STOP,
+      errorFlag
+    );
+
+    return new Promise(executeSoon);
+  }
+}
+
+class MockTopContext {
+  constructor(webProgress = null) {
+    this.currentURI = CURRENT_URI;
+    this.currentWindowGlobal = { isInitialDocument: true };
+    this.id = 7;
+    this.top = this;
+    this.webProgress = webProgress || new MockWebProgress(this);
+  }
+}
+
+const hasPromiseResolved = async function(promise) {
+  let resolved = false;
+  promise.finally(() => (resolved = true));
+  // Make sure microtasks have time to run.
+  await new Promise(resolve => Services.tm.dispatchToMainThread(resolve));
+  return resolved;
+};
+
+const hasPromiseRejected = async function(promise) {
+  let rejected = false;
+  promise.catch(() => (rejected = true));
+  // Make sure microtasks have time to run.
+  await new Promise(resolve => Services.tm.dispatchToMainThread(resolve));
+  return rejected;
+};
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentNoWindowGlobal() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    // In some cases there might be no window global yet.
+    delete browsingContext.currentWindowGlobal;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+    await webProgress.sendStartState({ isInitial: true });
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is initial document"
+    );
+    equal(
+      currentURI.spec,
+      INITIAL_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, INITIAL_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentNotLoaded() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    await webProgress.sendStartState({ isInitial: true });
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is initial document"
+    );
+    equal(
+      currentURI.spec,
+      INITIAL_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, INITIAL_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentLoadingAndNoAdditionalLoad() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: true });
+    ok(webProgress.isLoadingDocument, "Document is loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is initial document"
+    );
+    equal(
+      currentURI.spec,
+      INITIAL_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, INITIAL_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentFinishedLoadingNoAdditionalLoad() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: true });
+    await webProgress.sendStopState();
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is initial document"
+    );
+    equal(
+      currentURI.spec,
+      INITIAL_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, INITIAL_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentLoadingAndAdditionalLoad() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: true });
+
+    ok(webProgress.isLoadingDocument, "Document is loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+
+    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+    await new Promise(resolve => setTimeout(resolve, 100));
+
+    await webProgress.sendStartState({ isInitial: false });
+    await webProgress.sendStopState();
+
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      !webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is not initial document"
+    );
+    equal(
+      currentURI.spec,
+      TARGET_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_initialDocumentFinishedLoadingAndAdditionalLoad() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: true });
+    await webProgress.sendStopState();
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+    await new Promise(resolve => setTimeout(resolve, 100));
+
+    await webProgress.sendStartState({ isInitial: false });
+    await webProgress.sendStopState();
+
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      !webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is not initial document"
+    );
+    equal(
+      currentURI.spec,
+      TARGET_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_notInitialDocumentNotLoading() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+    await webProgress.sendStartState({ isInitial: false });
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      !browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is not initial document"
+    );
+    equal(
+      currentURI.spec,
+      TARGET_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_notInitialDocumentAlreadyLoading() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: false });
+    ok(webProgress.isLoadingDocument, "Document is loading");
+
+    const navigated = waitForInitialNavigationCompleted(webProgress);
+
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "waitForInitialNavigationCompleted has not resolved yet"
+    );
+
+    await webProgress.sendStopState();
+    const { currentURI, targetURI } = await navigated;
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      !browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is not initial document"
+    );
+    equal(
+      currentURI.spec,
+      TARGET_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_waitForInitialNavigation_notInitialDocumentFinishedLoading() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    await webProgress.sendStartState({ isInitial: false });
+    await webProgress.sendStopState();
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+    const { currentURI, targetURI } = await waitForInitialNavigationCompleted(
+      webProgress
+    );
+
+    ok(!webProgress.isLoadingDocument, "Document is not loading");
+    ok(
+      !webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+      "Is not initial document"
+    );
+    equal(
+      currentURI.spec,
+      TARGET_URI.spec,
+      "Expected current URI has been set"
+    );
+    equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+    run_next_test();
+  }
+);
+
+add_test(async function test_waitForInitialNavigation_resolveWhenStarted() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  await webProgress.sendStartState({ isInitial: true });
+  ok(webProgress.isLoadingDocument, "Document is already loading");
+
+  const { currentURI, targetURI } = await waitForInitialNavigationCompleted(
+    webProgress,
+    {
+      resolveWhenStarted: true,
+    }
+  );
+
+  ok(webProgress.isLoadingDocument, "Document is still loading");
+  ok(
+    webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+    "Is initial document"
+  );
+  equal(currentURI.spec, CURRENT_URI.spec, "Expected current URI has been set");
+  equal(targetURI.spec, INITIAL_URI.spec, "Expected target URI has been set");
+
+  run_next_test();
+});
+
+add_test(async function test_waitForInitialNavigation_crossOrigin() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  ok(!webProgress.isLoadingDocument, "Document is not loading");
+
+  const navigated = waitForInitialNavigationCompleted(webProgress);
+  await webProgress.sendStartState({ coop: true });
+
+  ok(
+    !(await hasPromiseResolved(navigated)),
+    "waitForInitialNavigationCompleted has not resolved yet"
+  );
+
+  await webProgress.sendStopState();
+  const { currentURI, targetURI } = await navigated;
+
+  notEqual(
+    browsingContext,
+    webProgress.browsingContext,
+    "Got new browsing context"
+  );
+  ok(!webProgress.isLoadingDocument, "Document is not loading");
+  ok(
+    !webProgress.browsingContext.currentWindowGlobal.isInitialDocument,
+    "Is not initial document"
+  );
+  equal(currentURI.spec, TARGET_URI.spec, "Expected current URI has been set");
+  equal(targetURI.spec, TARGET_URI.spec, "Expected target URI has been set");
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_expectNavigation() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress, {
+    expectNavigation: true,
+    unloadTimeout: 10,
+  });
+  const navigated = progressListener.start();
+
+  // Wait for unloadTimeout to finish in case it started
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  await new Promise(resolve => setTimeout(resolve, 30));
+
+  ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved yet");
+
+  await webProgress.sendStartState();
+  await webProgress.sendStopState();
+
+  ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+  run_next_test();
+});
+
+add_test(
+  async function test_ProgressListener_expectNavigation_initialDocumentFinishedLoading() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    const progressListener = new ProgressListener(webProgress, {
+      expectNavigation: true,
+      unloadTimeout: 10,
+    });
+    const navigated = progressListener.start();
+
+    ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved yet");
+
+    await webProgress.sendStartState({ isInitial: true });
+    await webProgress.sendStopState();
+
+    // Wait for unloadTimeout to finish in case it started
+    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+    await new Promise(resolve => setTimeout(resolve, 30));
+
+    ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved yet");
+
+    await webProgress.sendStartState();
+    await webProgress.sendStopState();
+
+    ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+    run_next_test();
+  }
+);
+
+add_test(async function test_ProgressListener_isStarted() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress);
+  ok(!progressListener.isStarted);
+
+  progressListener.start();
+  ok(progressListener.isStarted);
+
+  progressListener.stop();
+  ok(!progressListener.isStarted);
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_notWaitForExplicitStart() {
+  // Create a webprogress and start it before creating the progress listener.
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+  await webProgress.sendStartState();
+
+  // Create the progress listener for a webprogress already in a navigation.
+  const progressListener = new ProgressListener(webProgress, {
+    waitForExplicitStart: false,
+  });
+  const navigated = progressListener.start();
+
+  // Send stop state to complete the initial navigation
+  await webProgress.sendStopState();
+  ok(
+    await hasPromiseResolved(navigated),
+    "Listener has resolved after initial navigation"
+  );
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_waitForExplicitStart() {
+  // Create a webprogress and start it before creating the progress listener.
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+  await webProgress.sendStartState();
+
+  // Create the progress listener for a webprogress already in a navigation.
+  const progressListener = new ProgressListener(webProgress, {
+    waitForExplicitStart: true,
+  });
+  const navigated = progressListener.start();
+
+  // Send stop state to complete the initial navigation
+  await webProgress.sendStopState();
+  ok(
+    !(await hasPromiseResolved(navigated)),
+    "Listener has not resolved after initial navigation"
+  );
+
+  // Start a new navigation
+  await webProgress.sendStartState();
+  ok(
+    !(await hasPromiseResolved(navigated)),
+    "Listener has not resolved after starting new navigation"
+  );
+
+  // Finish the new navigation
+  await webProgress.sendStopState();
+  ok(
+    await hasPromiseResolved(navigated),
+    "Listener resolved after finishing the new navigation"
+  );
+
+  run_next_test();
+});
+
+add_test(
+  async function test_ProgressListener_waitForExplicitStartAndResolveWhenStarted() {
+    // Create a webprogress and start it before creating the progress listener.
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+    await webProgress.sendStartState();
+
+    // Create the progress listener for a webprogress already in a navigation.
+    const progressListener = new ProgressListener(webProgress, {
+      resolveWhenStarted: true,
+      waitForExplicitStart: true,
+    });
+    const navigated = progressListener.start();
+
+    // Send stop state to complete the initial navigation
+    await webProgress.sendStopState();
+    ok(
+      !(await hasPromiseResolved(navigated)),
+      "Listener has not resolved after initial navigation"
+    );
+
+    // Start a new navigation
+    await webProgress.sendStartState();
+    ok(
+      await hasPromiseResolved(navigated),
+      "Listener resolved after starting the new navigation"
+    );
+
+    run_next_test();
+  }
+);
+
+add_test(
+  async function test_ProgressListener_resolveWhenNavigatingInsideDocument() {
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+
+    const progressListener = new ProgressListener(webProgress);
+    const navigated = progressListener.start();
+
+    ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved");
+
+    // Send hash change location change notification to complete the navigation
+    await webProgress.sendLocationChange({
+      flag: Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT,
+    });
+
+    ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+    const { currentURI, targetURI } = progressListener;
+    equal(
+      currentURI.spec,
+      TARGET_URI_WITH_HASH.spec,
+      "Expected current URI has been set"
+    );
+    equal(
+      targetURI.spec,
+      TARGET_URI_WITH_HASH.spec,
+      "Expected target URI has been set"
+    );
+
+    run_next_test();
+  }
+);
+
+add_test(async function test_ProgressListener_ignoreCacheError() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress);
+  const navigated = progressListener.start();
+
+  ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved");
+
+  await webProgress.sendStartState();
+  await webProgress.sendStopState({
+    errorFlag: Cr.NS_ERROR_PARSED_DATA_CACHED,
+  });
+
+  ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_navigationRejectedOnErrorPage() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress, {
+    waitForExplicitStart: false,
+  });
+  const navigated = progressListener.start();
+
+  await webProgress.sendStartState();
+  await webProgress.sendLocationChange({
+    flag:
+      Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT |
+      Ci.nsIWebProgressListener.LOCATION_CHANGE_ERROR_PAGE,
+  });
+
+  ok(
+    await hasPromiseRejected(navigated),
+    "Listener has rejected in location change for error page"
+  );
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_navigationRejectedOnStopState() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress, {
+    waitForExplicitStart: false,
+  });
+  const navigated = progressListener.start();
+
+  await webProgress.sendStartState();
+  await webProgress.sendStopState({ errorFlag: Cr.NS_BINDING_ABORTED });
+
+  ok(
+    await hasPromiseRejected(navigated),
+    "Listener has rejected in stop state for erroneous navigation"
+  );
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_stopIfStarted() {
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+
+  const progressListener = new ProgressListener(webProgress);
+  const navigated = progressListener.start();
+
+  progressListener.stopIfStarted();
+  ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved");
+
+  await webProgress.sendStartState();
+  progressListener.stopIfStarted();
+  ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+  run_next_test();
+});
+
+add_test(async function test_ProgressListener_stopIfStarted_alreadyStarted() {
+  // Create an already navigating browsing context.
+  const browsingContext = new MockTopContext();
+  const webProgress = browsingContext.webProgress;
+  await webProgress.sendStartState();
+
+  // Create a progress listener which accepts already ongoing navigations.
+  const progressListener = new ProgressListener(webProgress, {
+    waitForExplicitStart: false,
+  });
+  const navigated = progressListener.start();
+
+  // stopIfStarted should stop the listener because of the ongoing navigation.
+  progressListener.stopIfStarted();
+  ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+  run_next_test();
+});
+
+add_test(
+  async function test_ProgressListener_stopIfStarted_alreadyStarted_waitForExplicitStart() {
+    // Create an already navigating browsing context.
+    const browsingContext = new MockTopContext();
+    const webProgress = browsingContext.webProgress;
+    await webProgress.sendStartState();
+
+    // Create a progress listener which rejects already ongoing navigations.
+    const progressListener = new ProgressListener(webProgress, {
+      waitForExplicitStart: true,
+    });
+    const navigated = progressListener.start();
+
+    // stopIfStarted will not stop the listener for the existing navigation.
+    progressListener.stopIfStarted();
+    ok(!(await hasPromiseResolved(navigated)), "Listener has not resolved");
+
+    // stopIfStarted will stop the listener when called after starting a new
+    // navigation.
+    await webProgress.sendStartState();
+    progressListener.stopIfStarted();
+    ok(await hasPromiseResolved(navigated), "Listener has resolved");
+
+    run_next_test();
+  }
+);
diff --git a/remote/shared/test/xpcshell/test_RecommendedPreferences.js b/remote/shared/test/xpcshell/test_RecommendedPreferences.js
new file mode 100644
index 0000000000..d42482d1d8
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_RecommendedPreferences.js
@@ -0,0 +1,111 @@
+/* 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/. */
+
+const { RecommendedPreferences } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/RecommendedPreferences.sys.mjs"
+);
+
+const COMMON_PREF = "toolkit.startup.max_resumed_crashes";
+
+const MARIONETTE_PREF = "dom.disable_beforeunload";
+const MARIONETTE_RECOMMENDED_PREFS = new Map([[MARIONETTE_PREF, true]]);
+
+const CDP_PREF = "browser.contentblocking.features.standard";
+const CDP_RECOMMENDED_PREFS = new Map([
+  [CDP_PREF, "-tp,tpPrivate,cookieBehavior0,-cm,-fp"],
+]);
+
+function cleanup() {
+  info("Restore recommended preferences and test preferences");
+  Services.prefs.clearUserPref("remote.prefs.recommended");
+  RecommendedPreferences.restoreAllPreferences();
+}
+
+// cleanup() should be called:
+// - explicitly after each test to avoid side effects
+// - via registerCleanupFunction in case a test crashes/times out
+registerCleanupFunction(cleanup);
+
+add_task(async function test_RecommendedPreferences() {
+  info("Check initial values for the test preferences");
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  info("Apply recommended preferences for a marionette client");
+  RecommendedPreferences.applyPreferences(MARIONETTE_RECOMMENDED_PREFS);
+  checkPreferences({ cdp: false, common: true, marionette: true });
+
+  info("Apply recommended preferences for a cdp client");
+  RecommendedPreferences.applyPreferences(CDP_RECOMMENDED_PREFS);
+  checkPreferences({ cdp: true, common: true, marionette: true });
+
+  info("Restore marionette preferences");
+  RecommendedPreferences.restorePreferences(MARIONETTE_RECOMMENDED_PREFS);
+  checkPreferences({ cdp: true, common: true, marionette: false });
+
+  info("Restore cdp preferences");
+  RecommendedPreferences.restorePreferences(CDP_RECOMMENDED_PREFS);
+  checkPreferences({ cdp: false, common: true, marionette: false });
+
+  info("Restore all the altered preferences");
+  RecommendedPreferences.restoreAllPreferences();
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  info("Attemps to restore again");
+  RecommendedPreferences.restoreAllPreferences();
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  cleanup();
+});
+
+add_task(async function test_RecommendedPreferences_disabled() {
+  info("Disable RecommendedPreferences");
+  Services.prefs.setBoolPref("remote.prefs.recommended", false);
+
+  info("Check initial values for the test preferences");
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  info("Recommended preferences are not applied, applyPreferences is a no-op");
+  RecommendedPreferences.applyPreferences(MARIONETTE_RECOMMENDED_PREFS);
+  checkPreferences({ cdp: false, common: false, marionette: false });
+
+  cleanup();
+});
+
+// Check that protocols can override common preferences.
+add_task(async function test_RecommendedPreferences_override() {
+  info("Make sure the common preference has no user value");
+  Services.prefs.clearUserPref(COMMON_PREF);
+
+  const OVERRIDE_VALUE = 42;
+  const OVERRIDE_COMMON_PREF = new Map([[COMMON_PREF, OVERRIDE_VALUE]]);
+
+  info("Apply a map of preferences overriding a common preference");
+  RecommendedPreferences.applyPreferences(OVERRIDE_COMMON_PREF);
+
+  equal(
+    Services.prefs.getIntPref(COMMON_PREF),
+    OVERRIDE_VALUE,
+    "The common preference was set to the expected value"
+  );
+
+  cleanup();
+});
+
+function checkPreferences({ cdp, common, marionette }) {
+  checkPreference(COMMON_PREF, { hasValue: common });
+  checkPreference(MARIONETTE_PREF, { hasValue: marionette });
+  checkPreference(CDP_PREF, { hasValue: cdp });
+}
+
+function checkPreference(pref, { hasValue }) {
+  equal(
+    Services.prefs.prefHasUserValue(pref),
+    hasValue,
+    hasValue
+      ? `The preference ${pref} has a user value`
+      : `The preference ${pref} has no user value`
+  );
+}
diff --git a/remote/shared/test/xpcshell/test_Stack.js b/remote/shared/test/xpcshell/test_Stack.js
new file mode 100644
index 0000000000..c41c5f0240
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_Stack.js
@@ -0,0 +1,120 @@
+/* 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/. */
+
+const { getFramesFromStack, isChromeFrame } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/Stack.sys.mjs"
+);
+
+const sourceFrames = [
+  {
+    column: 1,
+    functionDisplayName: "foo",
+    line: 2,
+    source: "cheese",
+    sourceId: 1,
+  },
+  {
+    column: 3,
+    functionDisplayName: null,
+    line: 4,
+    source: "cake",
+    sourceId: 2,
+  },
+  {
+    column: 5,
+    functionDisplayName: "chrome",
+    line: 6,
+    source: "chrome://foo",
+    sourceId: 3,
+  },
+];
+
+const targetFrames = [
+  {
+    columnNumber: 1,
+    functionName: "foo",
+    lineNumber: 2,
+    filename: "cheese",
+    sourceId: 1,
+  },
+  {
+    columnNumber: 3,
+    functionName: "",
+    lineNumber: 4,
+    filename: "cake",
+    sourceId: 2,
+  },
+  {
+    columnNumber: 5,
+    functionName: "chrome",
+    lineNumber: 6,
+    filename: "chrome://foo",
+    sourceId: 3,
+  },
+];
+
+add_task(async function test_getFramesFromStack() {
+  const stack = buildStack(sourceFrames);
+  const frames = getFramesFromStack(stack, { includeChrome: false });
+
+  ok(Array.isArray(frames), "frames is of expected type Array");
+  equal(frames.length, 3, "Got expected amount of frames");
+  checkFrame(frames.at(0), targetFrames.at(0));
+  checkFrame(frames.at(1), targetFrames.at(1));
+  checkFrame(frames.at(2), targetFrames.at(2));
+});
+
+add_task(async function test_getFramesFromStack_asyncStack() {
+  const stack = buildStack(sourceFrames, true);
+  const frames = getFramesFromStack(stack);
+
+  ok(Array.isArray(frames), "frames is of expected type Array");
+  equal(frames.length, 3, "Got expected amount of frames");
+  checkFrame(frames.at(0), targetFrames.at(0));
+  checkFrame(frames.at(1), targetFrames.at(1));
+  checkFrame(frames.at(2), targetFrames.at(2));
+});
+
+add_task(async function test_isChromeFrame() {
+  for (const filename of ["chrome://foo/bar", "resource://foo/bar"]) {
+    ok(isChromeFrame({ filename }), "Frame is of expected chrome scope");
+  }
+
+  for (const filename of ["http://foo.bar", "about:blank"]) {
+    ok(!isChromeFrame({ filename }), "Frame is of expected content scope");
+  }
+});
+
+function buildStack(frames, async = false) {
+  const parent = async ? "asyncParent" : "parent";
+
+  let currentFrame, stack;
+  for (const frame of frames) {
+    if (currentFrame) {
+      currentFrame[parent] = Object.assign({}, frame);
+      currentFrame = currentFrame[parent];
+    } else {
+      stack = Object.assign({}, frame);
+      currentFrame = stack;
+    }
+  }
+
+  return stack;
+}
+
+function checkFrame(frame, expectedFrame) {
+  equal(
+    frame.columnNumber,
+    expectedFrame.columnNumber,
+    "Got expected column number"
+  );
+  equal(
+    frame.functionName,
+    expectedFrame.functionName,
+    "Got expected function name"
+  );
+  equal(frame.lineNumber, expectedFrame.lineNumber, "Got expected line number");
+  equal(frame.filename, expectedFrame.filename, "Got expected filename");
+  equal(frame.sourceId, expectedFrame.sourceId, "Got expected source id");
+}
diff --git a/remote/shared/test/xpcshell/test_Sync.js b/remote/shared/test/xpcshell/test_Sync.js
new file mode 100644
index 0000000000..770f6b0758
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_Sync.js
@@ -0,0 +1,393 @@
+/* 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/. */
+
+const { setTimeout } = ChromeUtils.importESModule(
+  "resource://gre/modules/Timer.sys.mjs"
+);
+
+const {
+  AnimationFramePromise,
+  Deferred,
+  EventPromise,
+  PollPromise,
+} = ChromeUtils.importESModule("chrome://remote/content/shared/Sync.sys.mjs");
+
+/**
+ * Mimic a DOM node for listening for events.
+ */
+class MockElement {
+  constructor() {
+    this.capture = false;
+    this.eventName = null;
+    this.func = null;
+    this.mozSystemGroup = false;
+    this.wantUntrusted = false;
+    this.untrusted = false;
+  }
+
+  addEventListener(name, func, options = {}) {
+    const { capture, mozSystemGroup, wantUntrusted } = options;
+
+    this.eventName = name;
+    this.func = func;
+    this.capture = capture ?? false;
+    this.mozSystemGroup = mozSystemGroup ?? false;
+    this.wantUntrusted = wantUntrusted ?? false;
+  }
+
+  click() {
+    if (this.func) {
+      const event = {
+        capture: this.capture,
+        mozSystemGroup: this.mozSystemGroup,
+        target: this,
+        type: this.eventName,
+        untrusted: this.untrusted,
+        wantUntrusted: this.wantUntrusted,
+      };
+      this.func(event);
+    }
+  }
+
+  dispatchEvent(event) {
+    if (this.wantUntrusted) {
+      this.untrusted = true;
+    }
+    this.click();
+  }
+
+  removeEventListener(name, func) {
+    this.capture = false;
+    this.eventName = null;
+    this.func = null;
+    this.mozSystemGroup = false;
+    this.untrusted = false;
+    this.wantUntrusted = false;
+  }
+}
+
+add_task(async function test_AnimationFramePromise() {
+  let called = false;
+  let win = {
+    requestAnimationFrame(callback) {
+      called = true;
+      callback();
+    },
+  };
+  await AnimationFramePromise(win);
+  ok(called);
+});
+
+add_task(async function test_AnimationFramePromiseAbortWhenWindowClosed() {
+  let win = {
+    closed: true,
+    requestAnimationFrame() {},
+  };
+  await AnimationFramePromise(win);
+});
+
+add_task(async function test_DeferredPending() {
+  const deferred = Deferred();
+  ok(deferred.pending);
+
+  deferred.resolve();
+  await deferred.promise;
+  ok(!deferred.pending);
+});
+
+add_task(async function test_DeferredRejected() {
+  const deferred = Deferred();
+
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  setTimeout(() => deferred.reject(new Error("foo")), 100);
+
+  try {
+    await deferred.promise;
+    ok(false);
+  } catch (e) {
+    ok(!deferred.pending);
+
+    ok(!deferred.fulfilled);
+    ok(deferred.rejected);
+    equal(e.message, "foo");
+  }
+});
+
+add_task(async function test_DeferredResolved() {
+  const deferred = Deferred();
+  ok(deferred.pending);
+
+  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+  setTimeout(() => deferred.resolve("foo"), 100);
+
+  const result = await deferred.promise;
+  ok(!deferred.pending);
+
+  ok(deferred.fulfilled);
+  ok(!deferred.rejected);
+  equal(result, "foo");
+});
+
+add_task(async function test_EventPromise_subjectTypes() {
+  for (const subject of ["foo", 42, null, undefined, true, [], {}]) {
+    Assert.throws(() => new EventPromise(subject, "click"), /TypeError/);
+  }
+});
+
+add_task(async function test_EventPromise_eventNameTypes() {
+  const element = new MockElement();
+
+  for (const eventName of [42, null, undefined, true, [], {}]) {
+    Assert.throws(() => new EventPromise(element, eventName), /TypeError/);
+  }
+});
+
+add_task(async function test_EventPromise_subjectAndEventNameEvent() {
+  const element = new MockElement();
+
+  const clicked = new EventPromise(element, "click");
+  element.click();
+  const event = await clicked;
+
+  equal(element, event.target);
+});
+
+add_task(async function test_EventPromise_captureTypes() {
+  const element = new MockElement();
+
+  for (const capture of [null, "foo", 42, [], {}]) {
+    Assert.throws(
+      () => new EventPromise(element, "click", { capture }),
+      /TypeError/
+    );
+  }
+});
+
+add_task(async function test_EventPromise_captureEvent() {
+  const element = new MockElement();
+
+  for (const capture of [undefined, false, true]) {
+    const expectedCapture = capture ?? false;
+
+    const clicked = new EventPromise(element, "click", { capture });
+    element.click();
+    const event = await clicked;
+
+    equal(element, event.target);
+    equal(expectedCapture, event.capture);
+  }
+});
+
+add_task(async function test_EventPromise_checkFnTypes() {
+  const element = new MockElement();
+
+  for (const checkFn of ["foo", 42, true, [], {}]) {
+    Assert.throws(
+      () => new EventPromise(element, "click", { checkFn }),
+      /TypeError/
+    );
+  }
+});
+
+add_task(async function test_EventPromise_checkFnCallback() {
+  const element = new MockElement();
+
+  let count;
+  const data = [
+    { checkFn: null, expected_count: 0 },
+    { checkFn: undefined, expected_count: 0 },
+    {
+      checkFn: event => {
+        throw new Error("foo");
+      },
+      expected_count: 0,
+    },
+    { checkFn: event => count++ > 0, expected_count: 2 },
+  ];
+
+  for (const { checkFn, expected_count } of data) {
+    count = 0;
+
+    const clicked = new EventPromise(element, "click", { checkFn });
+    element.click();
+    element.click();
+    const event = await clicked;
+
+    equal(element, event.target);
+    equal(expected_count, count);
+  }
+});
+
+add_task(async function test_EventPromise_mozSystemGroupTypes() {
+  const element = new MockElement();
+
+  for (const mozSystemGroup of [null, "foo", 42, [], {}]) {
+    Assert.throws(
+      () => new EventPromise(element, "click", { mozSystemGroup }),
+      /TypeError/
+    );
+  }
+});
+
+add_task(async function test_EventPromise_mozSystemGroupEvent() {
+  const element = new MockElement();
+
+  for (const mozSystemGroup of [undefined, false, true]) {
+    const expectedMozSystemGroup = mozSystemGroup ?? false;
+
+    const clicked = new EventPromise(element, "click", { mozSystemGroup });
+    element.click();
+    const event = await clicked;
+
+    equal(element, event.target);
+    equal(expectedMozSystemGroup, event.mozSystemGroup);
+  }
+});
+
+add_task(async function test_EventPromise_wantUntrustedTypes() {
+  const element = new MockElement();
+
+  for (let wantUntrusted of [null, "foo", 42, [], {}]) {
+    Assert.throws(
+      () => new EventPromise(element, "click", { wantUntrusted }),
+      /TypeError/
+    );
+  }
+});
+
+add_task(async function test_EventPromise_wantUntrustedEvent() {
+  for (const wantUntrusted of [undefined, false, true]) {
+    let expected_untrusted = wantUntrusted ?? false;
+
+    const element = new MockElement();
+
+    const clicked = new EventPromise(element, "click", { wantUntrusted });
+    element.dispatchEvent(new CustomEvent("click", {}));
+    const event = await clicked;
+
+    equal(element, event.target);
+    equal(expected_untrusted, event.untrusted);
+  }
+});
+
+add_task(function test_executeSoon_callback() {
+  // executeSoon() is already defined for xpcshell in head.js. As such import
+  // our implementation into a custom namespace.
+  let sync = ChromeUtils.importESModule(
+    "chrome://remote/content/shared/Sync.sys.mjs"
+  );
+
+  for (let func of ["foo", null, true, [], {}]) {
+    Assert.throws(() => sync.executeSoon(func), /TypeError/);
+  }
+
+  let a;
+  sync.executeSoon(() => {
+    a = 1;
+  });
+  executeSoon(() => equal(1, a));
+});
+
+add_task(function test_PollPromise_funcTypes() {
+  for (let type of ["foo", 42, null, undefined, true, [], {}]) {
+    Assert.throws(() => new PollPromise(type), /TypeError/);
+  }
+  new PollPromise(() => {});
+  new PollPromise(function() {});
+});
+
+add_task(function test_PollPromise_timeoutTypes() {
+  for (let timeout of ["foo", true, [], {}]) {
+    Assert.throws(() => new PollPromise(() => {}, { timeout }), /TypeError/);
+  }
+  for (let timeout of [1.2, -1]) {
+    Assert.throws(() => new PollPromise(() => {}, { timeout }), /RangeError/);
+  }
+  for (let timeout of [null, undefined, 42]) {
+    new PollPromise(resolve => resolve(1), { timeout });
+  }
+});
+
+add_task(function test_PollPromise_intervalTypes() {
+  for (let interval of ["foo", null, true, [], {}]) {
+    Assert.throws(() => new PollPromise(() => {}, { interval }), /TypeError/);
+  }
+  for (let interval of [1.2, -1]) {
+    Assert.throws(() => new PollPromise(() => {}, { interval }), /RangeError/);
+  }
+  new PollPromise(() => {}, { interval: 42 });
+});
+
+add_task(async function test_PollPromise_retvalTypes() {
+  for (let typ of [true, false, "foo", 42, [], {}]) {
+    strictEqual(typ, await new PollPromise(resolve => resolve(typ)));
+  }
+});
+
+add_task(async function test_PollPromise_rethrowError() {
+  let nevals = 0;
+  let err;
+  try {
+    await PollPromise(() => {
+      ++nevals;
+      throw new Error();
+    });
+  } catch (e) {
+    err = e;
+  }
+  equal(1, nevals);
+  ok(err instanceof Error);
+});
+
+add_task(async function test_PollPromise_noTimeout() {
+  let nevals = 0;
+  await new PollPromise((resolve, reject) => {
+    ++nevals;
+    nevals < 100 ? reject() : resolve();
+  });
+  equal(100, nevals);
+});
+
+add_task(async function test_PollPromise_zeroTimeout() {
+  // run at least once when timeout is 0
+  let nevals = 0;
+  let start = new Date().getTime();
+  await new PollPromise(
+    (resolve, reject) => {
+      ++nevals;
+      reject();
+    },
+    { timeout: 0 }
+  );
+  let end = new Date().getTime();
+  equal(1, nevals);
+  less(end - start, 500);
+});
+
+add_task(async function test_PollPromise_timeoutElapse() {
+  let nevals = 0;
+  let start = new Date().getTime();
+  await new PollPromise(
+    (resolve, reject) => {
+      ++nevals;
+      reject();
+    },
+    { timeout: 100 }
+  );
+  let end = new Date().getTime();
+  lessOrEqual(nevals, 11);
+  greaterOrEqual(end - start, 100);
+});
+
+add_task(async function test_PollPromise_interval() {
+  let nevals = 0;
+  await new PollPromise(
+    (resolve, reject) => {
+      ++nevals;
+      reject();
+    },
+    { timeout: 100, interval: 100 }
+  );
+  equal(2, nevals);
+});
diff --git a/remote/shared/test/xpcshell/test_TabManager.js b/remote/shared/test/xpcshell/test_TabManager.js
new file mode 100644
index 0000000000..e9da02c861
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_TabManager.js
@@ -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/. */
+
+const { TabManager } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/TabManager.sys.mjs"
+);
+
+class MockTopBrowsingContext {
+  constructor() {
+    this.embedderElement = { permanentKey: {} };
+    this.id = 1;
+    this.top = this;
+  }
+}
+
+class MockBrowsingContext {
+  constructor() {
+    this.id = 2;
+
+    const topContext = new MockTopBrowsingContext();
+    this.parent = topContext;
+    this.top = topContext;
+  }
+}
+
+const mockTopBrowsingContext = new MockTopBrowsingContext();
+const mockBrowsingContext = new MockBrowsingContext();
+
+add_task(async function test_getIdForBrowsingContext() {
+  // Browsing context not set.
+  equal(TabManager.getIdForBrowsingContext(null), null);
+  equal(TabManager.getIdForBrowsingContext(undefined), null);
+
+  // Child browsing context.
+  equal(
+    TabManager.getIdForBrowsingContext(mockBrowsingContext),
+    mockBrowsingContext.id
+  );
+
+  const browser = mockTopBrowsingContext.embedderElement;
+  equal(
+    TabManager.getIdForBrowsingContext(mockTopBrowsingContext),
+    TabManager.getIdForBrowser(browser)
+  );
+});
+
+add_task(async function test_removeTab() {
+  // Tab not defined.
+  await TabManager.removeTab(null);
+});
+
+add_task(async function test_selectTab() {
+  // Tab not defined.
+  await TabManager.selectTab(null);
+});
diff --git a/remote/shared/test/xpcshell/xpcshell.ini b/remote/shared/test/xpcshell/xpcshell.ini
new file mode 100644
index 0000000000..050b26ec20
--- /dev/null
+++ b/remote/shared/test/xpcshell/xpcshell.ini
@@ -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/.
+
+[test_AppInfo.js]
+[test_Format.js]
+[test_Navigate.js]
+[test_RecommendedPreferences.js]
+[test_Stack.js]
+[test_Sync.js]
+[test_TabManager.js]