Adding upstream version 86.0.1.upstream/86.0.1upstream

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

157 files changed, 21215 insertions, 0 deletions

diff --git a/accessible/tests/browser/.eslintrc.js b/accessible/tests/browser/.eslintrc.js
new file mode 100644
index 0000000000..528797cb91
--- /dev/null
+++ b/accessible/tests/browser/.eslintrc.js
@@ -0,0 +1,28 @@
+"use strict";
+
+module.exports = {
+  rules: {
+    "mozilla/no-aArgs": "error",
+    "mozilla/reject-importGlobalProperties": ["error", "everything"],
+    "mozilla/var-only-at-top-level": "error",
+
+    "block-scoped-var": "error",
+    camelcase: ["error", { properties: "never" }],
+    complexity: ["error", 20],
+
+    "handle-callback-err": ["error", "er"],
+    "max-nested-callbacks": ["error", 4],
+    "new-cap": ["error", { capIsNew: false }],
+    "no-fallthrough": "error",
+    "no-multi-str": "error",
+    "no-proto": "error",
+    "no-return-assign": "error",
+    "no-shadow": "error",
+    "no-unused-vars": ["error", { vars: "all", args: "none" }],
+    "one-var": ["error", "never"],
+    radix: "error",
+    strict: ["error", "global"],
+    yoda: "error",
+    "no-undef-init": "error",
+  },
+};
diff --git a/accessible/tests/browser/Common.jsm b/accessible/tests/browser/Common.jsm
new file mode 100644
index 0000000000..527e301be9
--- /dev/null
+++ b/accessible/tests/browser/Common.jsm
@@ -0,0 +1,456 @@
+/* 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 EXPORTED_SYMBOLS = ["CommonUtils"];
+
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+const { Assert } = ChromeUtils.import("resource://testing-common/Assert.jsm");
+
+const MAX_TRIM_LENGTH = 100;
+
+const CommonUtils = {
+  /**
+   * Constant passed to getAccessible to indicate that it shouldn't fail if
+   * there is no accessible.
+   */
+  DONOTFAIL_IF_NO_ACC: 1,
+
+  /**
+   * Constant passed to getAccessible to indicate that it shouldn't fail if it
+   * does not support an interface.
+   */
+  DONOTFAIL_IF_NO_INTERFACE: 2,
+
+  /**
+   * nsIAccessibilityService service.
+   */
+  get accService() {
+    if (!this._accService) {
+      this._accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+        Ci.nsIAccessibilityService
+      );
+    }
+
+    return this._accService;
+  },
+
+  clearAccService() {
+    this._accService = null;
+    Cu.forceGC();
+  },
+
+  /**
+   * Adds an observer for an 'a11y-consumers-changed' event.
+   */
+  addAccConsumersChangedObserver() {
+    const deferred = {};
+    this._accConsumersChanged = new Promise(resolve => {
+      deferred.resolve = resolve;
+    });
+    const observe = (subject, topic, data) => {
+      Services.obs.removeObserver(observe, "a11y-consumers-changed");
+      deferred.resolve(JSON.parse(data));
+    };
+    Services.obs.addObserver(observe, "a11y-consumers-changed");
+  },
+
+  /**
+   * Returns a promise that resolves when 'a11y-consumers-changed' event is
+   * fired.
+   *
+   * @return {Promise}
+   *         event promise evaluating to event's data
+   */
+  observeAccConsumersChanged() {
+    return this._accConsumersChanged;
+  },
+
+  /**
+   * Adds an observer for an 'a11y-init-or-shutdown' event with a value of "1"
+   * which indicates that an accessibility service is initialized in the current
+   * process.
+   */
+  addAccServiceInitializedObserver() {
+    const deferred = {};
+    this._accServiceInitialized = new Promise((resolve, reject) => {
+      deferred.resolve = resolve;
+      deferred.reject = reject;
+    });
+    const observe = (subject, topic, data) => {
+      if (data === "1") {
+        Services.obs.removeObserver(observe, "a11y-init-or-shutdown");
+        deferred.resolve();
+      } else {
+        deferred.reject("Accessibility service is shutdown unexpectedly.");
+      }
+    };
+    Services.obs.addObserver(observe, "a11y-init-or-shutdown");
+  },
+
+  /**
+   * Returns a promise that resolves when an accessibility service is
+   * initialized in the current process. Otherwise (if the service is shutdown)
+   * the promise is rejected.
+   */
+  observeAccServiceInitialized() {
+    return this._accServiceInitialized;
+  },
+
+  /**
+   * Adds an observer for an 'a11y-init-or-shutdown' event with a value of "0"
+   * which indicates that an accessibility service is shutdown in the current
+   * process.
+   */
+  addAccServiceShutdownObserver() {
+    const deferred = {};
+    this._accServiceShutdown = new Promise((resolve, reject) => {
+      deferred.resolve = resolve;
+      deferred.reject = reject;
+    });
+    const observe = (subject, topic, data) => {
+      if (data === "0") {
+        Services.obs.removeObserver(observe, "a11y-init-or-shutdown");
+        deferred.resolve();
+      } else {
+        deferred.reject("Accessibility service is initialized unexpectedly.");
+      }
+    };
+    Services.obs.addObserver(observe, "a11y-init-or-shutdown");
+  },
+
+  /**
+   * Returns a promise that resolves when an accessibility service is shutdown
+   * in the current process. Otherwise (if the service is initialized) the
+   * promise is rejected.
+   */
+  observeAccServiceShutdown() {
+    return this._accServiceShutdown;
+  },
+
+  /**
+   * Extract DOMNode id from an accessible. If the accessible is in the remote
+   * process, DOMNode is not present in parent process. However, if specified by
+   * the author, DOMNode id will be attached to an accessible object.
+   *
+   * @param  {nsIAccessible} accessible  accessible
+   * @return {String?}                   DOMNode id if available
+   */
+  getAccessibleDOMNodeID(accessible) {
+    if (accessible instanceof Ci.nsIAccessibleDocument) {
+      // If accessible is a document, trying to find its document body id.
+      try {
+        return accessible.DOMNode.body.id;
+      } catch (e) {
+        /* This only works if accessible is not a proxy. */
+      }
+    }
+    try {
+      return accessible.DOMNode.id;
+    } catch (e) {
+      /* This will fail if DOMNode is in different process. */
+    }
+    try {
+      // When e10s is enabled, accessible will have an "id" property if its
+      // corresponding DOMNode has an id. If accessible is a document, its "id"
+      // property corresponds to the "id" of its body element.
+      return accessible.id;
+    } catch (e) {
+      /* This will fail if accessible is not a proxy. */
+    }
+
+    return null;
+  },
+
+  getObjAddress(obj) {
+    const exp = /native\s*@\s*(0x[a-f0-9]+)/g;
+    const match = exp.exec(obj.toString());
+    if (match) {
+      return match[1];
+    }
+
+    return obj.toString();
+  },
+
+  getNodePrettyName(node) {
+    try {
+      let tag = "";
+      if (node.nodeType == Node.DOCUMENT_NODE) {
+        tag = "document";
+      } else {
+        tag = node.localName;
+        if (node.nodeType == Node.ELEMENT_NODE && node.hasAttribute("id")) {
+          tag += `@id="${node.getAttribute("id")}"`;
+        }
+      }
+
+      return `"${tag} node", address: ${this.getObjAddress(node)}`;
+    } catch (e) {
+      return `" no node info "`;
+    }
+  },
+
+  /**
+   * Convert role to human readable string.
+   */
+  roleToString(role) {
+    return this.accService.getStringRole(role);
+  },
+
+  /**
+   * Shorten a long string if it exceeds MAX_TRIM_LENGTH.
+   *
+   * @param aString the string to shorten.
+   *
+   * @returns the shortened string.
+   */
+  shortenString(str) {
+    if (str.length <= MAX_TRIM_LENGTH) {
+      return str;
+    }
+
+    // Trim the string if its length is > MAX_TRIM_LENGTH characters.
+    const trimOffset = MAX_TRIM_LENGTH / 2;
+
+    return `${str.substring(0, trimOffset - 1)}…${str.substring(
+      str.length - trimOffset,
+      str.length
+    )}`;
+  },
+
+  normalizeAccTreeObj(obj) {
+    const key = Object.keys(obj)[0];
+    const roleName = `ROLE_${key}`;
+    if (roleName in Ci.nsIAccessibleRole) {
+      return {
+        role: Ci.nsIAccessibleRole[roleName],
+        children: obj[key],
+      };
+    }
+
+    return obj;
+  },
+
+  stringifyTree(obj) {
+    let text = this.roleToString(obj.role) + ": [ ";
+    if ("children" in obj) {
+      for (let i = 0; i < obj.children.length; i++) {
+        const c = this.normalizeAccTreeObj(obj.children[i]);
+        text += this.stringifyTree(c);
+        if (i < obj.children.length - 1) {
+          text += ", ";
+        }
+      }
+    }
+
+    return `${text}] `;
+  },
+
+  /**
+   * Return pretty name for identifier, it may be ID, DOM node or accessible.
+   */
+  prettyName(identifier) {
+    if (identifier instanceof Array) {
+      let msg = "";
+      for (let idx = 0; idx < identifier.length; idx++) {
+        if (msg != "") {
+          msg += ", ";
+        }
+
+        msg += this.prettyName(identifier[idx]);
+      }
+      return msg;
+    }
+
+    if (identifier instanceof Ci.nsIAccessible) {
+      const acc = this.getAccessible(identifier);
+      const domID = this.getAccessibleDOMNodeID(acc);
+      let msg = "[";
+      try {
+        if (Services.appinfo.browserTabsRemoteAutostart) {
+          if (domID) {
+            msg += `DOM node id: ${domID}, `;
+          }
+        } else {
+          msg += `${this.getNodePrettyName(acc.DOMNode)}, `;
+        }
+        msg += `role: ${this.roleToString(acc.role)}`;
+        if (acc.name) {
+          msg += `, name: "${this.shortenString(acc.name)}"`;
+        }
+      } catch (e) {
+        msg += "defunct";
+      }
+
+      if (acc) {
+        msg += `, address: ${this.getObjAddress(acc)}`;
+      }
+      msg += "]";
+
+      return msg;
+    }
+
+    if (Node.isInstance(identifier)) {
+      return `[ ${this.getNodePrettyName(identifier)} ]`;
+    }
+
+    if (identifier && typeof identifier === "object") {
+      const treeObj = this.normalizeAccTreeObj(identifier);
+      if ("role" in treeObj) {
+        return `{ ${this.stringifyTree(treeObj)} }`;
+      }
+
+      return JSON.stringify(identifier);
+    }
+
+    return ` "${identifier}" `;
+  },
+
+  /**
+   * Return accessible for the given identifier (may be ID attribute or DOM
+   * element or accessible object) or null.
+   *
+   * @param accOrElmOrID
+   *        identifier to get an accessible implementing the given interfaces
+   * @param aInterfaces
+   *        [optional] the interface or an array interfaces to query it/them
+   *        from obtained accessible
+   * @param elmObj
+   *        [optional] object to store DOM element which accessible is obtained
+   *        for
+   * @param doNotFailIf
+   *        [optional] no error for special cases (see DONOTFAIL_IF_NO_ACC,
+   *        DONOTFAIL_IF_NO_INTERFACE)
+   * @param doc
+   *        [optional] document for when accOrElmOrID is an ID.
+   */
+  getAccessible(accOrElmOrID, interfaces, elmObj, doNotFailIf, doc) {
+    if (!accOrElmOrID) {
+      return null;
+    }
+
+    let elm = null;
+    if (accOrElmOrID instanceof Ci.nsIAccessible) {
+      try {
+        elm = accOrElmOrID.DOMNode;
+      } catch (e) {}
+    } else if (Node.isInstance(accOrElmOrID)) {
+      elm = accOrElmOrID;
+    } else {
+      elm = doc.getElementById(accOrElmOrID);
+      if (!elm) {
+        Assert.ok(false, `Can't get DOM element for ${accOrElmOrID}`);
+        return null;
+      }
+    }
+
+    if (elmObj && typeof elmObj == "object") {
+      elmObj.value = elm;
+    }
+
+    let acc = accOrElmOrID instanceof Ci.nsIAccessible ? accOrElmOrID : null;
+    if (!acc) {
+      try {
+        acc = this.accService.getAccessibleFor(elm);
+      } catch (e) {}
+
+      if (!acc) {
+        if (!(doNotFailIf & this.DONOTFAIL_IF_NO_ACC)) {
+          Assert.ok(
+            false,
+            `Can't get accessible for ${this.prettyName(accOrElmOrID)}`
+          );
+        }
+
+        return null;
+      }
+    }
+
+    if (!interfaces) {
+      return acc;
+    }
+
+    if (!(interfaces instanceof Array)) {
+      interfaces = [interfaces];
+    }
+
+    for (let index = 0; index < interfaces.length; index++) {
+      if (acc instanceof interfaces[index]) {
+        continue;
+      }
+
+      try {
+        acc.QueryInterface(interfaces[index]);
+      } catch (e) {
+        if (!(doNotFailIf & this.DONOTFAIL_IF_NO_INTERFACE)) {
+          Assert.ok(
+            false,
+            `Can't query ${interfaces[index]} for ${accOrElmOrID}`
+          );
+        }
+
+        return null;
+      }
+    }
+
+    return acc;
+  },
+
+  /**
+   * Return the DOM node by identifier (may be accessible, DOM node or ID).
+   */
+  getNode(accOrNodeOrID, doc) {
+    if (!accOrNodeOrID) {
+      return null;
+    }
+
+    if (Node.isInstance(accOrNodeOrID)) {
+      return accOrNodeOrID;
+    }
+
+    if (accOrNodeOrID instanceof Ci.nsIAccessible) {
+      return accOrNodeOrID.DOMNode;
+    }
+
+    const node = doc.getElementById(accOrNodeOrID);
+    if (!node) {
+      Assert.ok(false, `Can't get DOM element for ${accOrNodeOrID}`);
+      return null;
+    }
+
+    return node;
+  },
+
+  /**
+   * Return root accessible.
+   *
+   * @param  {DOMNode} doc
+   *         Chrome document.
+   *
+   * @return {nsIAccessible}
+   *         Accessible object for chrome window.
+   */
+  getRootAccessible(doc) {
+    const acc = this.getAccessible(doc);
+    return acc ? acc.rootDocument.QueryInterface(Ci.nsIAccessible) : null;
+  },
+
+  /**
+   * Analogy of SimpleTest.is function used to compare objects.
+   */
+  isObject(obj, expectedObj, msg) {
+    if (obj == expectedObj) {
+      Assert.ok(true, msg);
+      return;
+    }
+
+    Assert.ok(
+      false,
+      `${msg} - got "${this.prettyName(obj)}", expected "${this.prettyName(
+        expectedObj
+      )}"`
+    );
+  },
+};
diff --git a/accessible/tests/browser/Layout.jsm b/accessible/tests/browser/Layout.jsm
new file mode 100644
index 0000000000..d51644ec57
--- /dev/null
+++ b/accessible/tests/browser/Layout.jsm
@@ -0,0 +1,181 @@
+/* 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 EXPORTED_SYMBOLS = ["Layout"];
+
+const { Assert } = ChromeUtils.import("resource://testing-common/Assert.jsm");
+const { CommonUtils } = ChromeUtils.import(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+);
+
+const Layout = {
+  /**
+   * Zoom the given document.
+   */
+  zoomDocument(doc, zoom) {
+    const bc = BrowsingContext.getFromWindow(doc.defaultView);
+    bc.fullZoom = zoom;
+  },
+
+  /**
+   * Set the relative resolution of this document. This is what apz does.
+   * On non-mobile platforms you won't see a visible change.
+   */
+  setResolution(doc, zoom) {
+    const windowUtils = doc.defaultView.windowUtils;
+    windowUtils.setResolutionAndScaleTo(zoom);
+  },
+
+  /**
+   * Assert.is() function checking the expected value is within the range.
+   */
+  isWithin(expected, got, within, msg) {
+    if (Math.abs(got - expected) <= within) {
+      Assert.ok(true, `${msg} - Got ${got}`);
+    } else {
+      Assert.ok(
+        false,
+        `${msg} - Got ${got}, expected ${expected} with error of ${within}`
+      );
+    }
+  },
+
+  /**
+   * Return the accessible coordinates relative to the screen in device pixels.
+   */
+  getPos(id) {
+    const accessible = CommonUtils.getAccessible(id);
+    const x = {};
+    const y = {};
+    accessible.getBounds(x, y, {}, {});
+
+    return [x.value, y.value];
+  },
+
+  /**
+   * Return the accessible coordinates and size relative to the screen in device
+   * pixels. This methods also retrieves coordinates in CSS pixels and ensures that they
+   * match Dev pixels with a given device pixel ratio.
+   */
+  getBounds(id, dpr) {
+    const accessible = CommonUtils.getAccessible(id);
+    const x = {};
+    const y = {};
+    const width = {};
+    const height = {};
+    const xInCSS = {};
+    const yInCSS = {};
+    const widthInCSS = {};
+    const heightInCSS = {};
+    accessible.getBounds(x, y, width, height);
+    accessible.getBoundsInCSSPixels(xInCSS, yInCSS, widthInCSS, heightInCSS);
+
+    this.isWithin(
+      x.value / dpr,
+      xInCSS.value,
+      1,
+      "X in CSS pixels is calculated correctly"
+    );
+    this.isWithin(
+      y.value / dpr,
+      yInCSS.value,
+      1,
+      "Y in CSS pixels is calculated correctly"
+    );
+    this.isWithin(
+      width.value / dpr,
+      widthInCSS.value,
+      1,
+      "Width in CSS pixels is calculated correctly"
+    );
+    this.isWithin(
+      height.value / dpr,
+      heightInCSS.value,
+      1,
+      "Height in CSS pixels is calculated correctly"
+    );
+
+    return [x.value, y.value, width.value, height.value];
+  },
+
+  getRangeExtents(id, startOffset, endOffset, coordOrigin) {
+    const hyperText = CommonUtils.getAccessible(id, [Ci.nsIAccessibleText]);
+    const x = {};
+    const y = {};
+    const width = {};
+    const height = {};
+    hyperText.getRangeExtents(
+      startOffset,
+      endOffset,
+      x,
+      y,
+      width,
+      height,
+      coordOrigin
+    );
+
+    return [x.value, y.value, width.value, height.value];
+  },
+
+  CSSToDevicePixels(win, x, y, width, height) {
+    const winUtil = win.windowUtils;
+    const ratio = winUtil.screenPixelsPerCSSPixel;
+
+    // CSS pixels and ratio can be not integer. Device pixels are always integer.
+    // Do our best and hope it works.
+    return [
+      Math.round(x * ratio),
+      Math.round(y * ratio),
+      Math.round(width * ratio),
+      Math.round(height * ratio),
+    ];
+  },
+
+  /**
+   * Return DOM node coordinates relative the screen and its size in device
+   * pixels.
+   */
+  getBoundsForDOMElm(id, doc) {
+    let x = 0;
+    let y = 0;
+    let width = 0;
+    let height = 0;
+
+    const elm = CommonUtils.getNode(id, doc);
+    const elmWindow = elm.ownerGlobal;
+    if (elm.localName == "area") {
+      const mapName = elm.parentNode.getAttribute("name");
+      const selector = `[usemap="#${mapName}"]`;
+      const img = elm.ownerDocument.querySelector(selector);
+
+      const areaCoords = elm.coords.split(",");
+      const areaX = parseInt(areaCoords[0], 10);
+      const areaY = parseInt(areaCoords[1], 10);
+      const areaWidth = parseInt(areaCoords[2], 10) - areaX;
+      const areaHeight = parseInt(areaCoords[3], 10) - areaY;
+
+      const rect = img.getBoundingClientRect();
+      x = rect.left + areaX;
+      y = rect.top + areaY;
+      width = areaWidth;
+      height = areaHeight;
+    } else {
+      const rect = elm.getBoundingClientRect();
+      x = rect.left;
+      y = rect.top;
+      width = rect.width;
+      height = rect.height;
+    }
+
+    return this.CSSToDevicePixels(
+      elmWindow,
+      x + elmWindow.mozInnerScreenX,
+      y + elmWindow.mozInnerScreenY,
+      width,
+      height
+    );
+  },
+};
diff --git a/accessible/tests/browser/bounds/browser.ini b/accessible/tests/browser/bounds/browser.ini
new file mode 100644
index 0000000000..1997e92ff1
--- /dev/null
+++ b/accessible/tests/browser/bounds/browser.ini
@@ -0,0 +1,13 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+
+[browser_test_resolution.js]
+skip-if = e10s && os == 'win' # bug 1372296
+[browser_test_zoom.js]
+[browser_test_zoom_text.js]
+skip-if = e10s && os == 'win' # bug 1372296
diff --git a/accessible/tests/browser/bounds/browser_test_resolution.js b/accessible/tests/browser/bounds/browser_test_resolution.js
new file mode 100644
index 0000000000..bdcb3e1792
--- /dev/null
+++ b/accessible/tests/browser/bounds/browser_test_resolution.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/layout.js */
+
+async function testScaledBounds(browser, accDoc, scale, id, type = "object") {
+  let acc = findAccessibleChildByID(accDoc, id);
+
+  // Get document offset
+  let [docX, docY] = getBounds(accDoc);
+
+  // Get the unscaled bounds of the accessible
+  let [x, y, width, height] =
+    type == "text"
+      ? getRangeExtents(acc, 0, -1, COORDTYPE_SCREEN_RELATIVE)
+      : getBounds(acc);
+
+  await invokeContentTask(browser, [scale], _scale => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+    Layout.setResolution(content.document, _scale);
+  });
+
+  let [scaledX, scaledY, scaledWidth, scaledHeight] =
+    type == "text"
+      ? getRangeExtents(acc, 0, -1, COORDTYPE_SCREEN_RELATIVE)
+      : getBounds(acc);
+
+  let name = prettyName(acc);
+  isWithin(scaledWidth, width * scale, 2, "Wrong scaled width of " + name);
+  isWithin(scaledHeight, height * scale, 2, "Wrong scaled height of " + name);
+  isWithin(scaledX - docX, (x - docX) * scale, 2, "Wrong scaled x of " + name);
+  isWithin(scaledY - docY, (y - docY) * scale, 2, "Wrong scaled y of " + name);
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+    Layout.setResolution(content.document, 1.0);
+  });
+}
+
+async function runTests(browser, accDoc) {
+  // The scrollbars get in the way of container bounds calculation.
+  await SpecialPowers.pushPrefEnv({
+    set: [["ui.useOverlayScrollbars", 1]],
+  });
+
+  await testScaledBounds(browser, accDoc, 2.0, "p1");
+  await testScaledBounds(browser, accDoc, 0.5, "p2");
+  await testScaledBounds(browser, accDoc, 3.5, "b1");
+
+  await testScaledBounds(browser, accDoc, 2.0, "p1", "text");
+  await testScaledBounds(browser, accDoc, 0.75, "p2", "text");
+}
+
+/**
+ * Test accessible boundaries when page is zoomed
+ */
+addAccessibleTask(
+  `
+<p id='p1' style='font-family: monospace;'>Tilimilitryamdiya</p>
+<p id="p2">para 2</p>
+<button id="b1">Hello</button>
+`,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/bounds/browser_test_zoom.js b/accessible/tests/browser/bounds/browser_test_zoom.js
new file mode 100644
index 0000000000..6600a17130
--- /dev/null
+++ b/accessible/tests/browser/bounds/browser_test_zoom.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/layout.js */
+
+async function testContentBounds(browser, acc) {
+  let [
+    expectedX,
+    expectedY,
+    expectedWidth,
+    expectedHeight,
+  ] = await getContentBoundsForDOMElm(browser, getAccessibleDOMNodeID(acc));
+
+  let contentDPR = await getContentDPR(browser);
+  let [x, y, width, height] = getBounds(acc, contentDPR);
+  let prettyAccName = prettyName(acc);
+  is(x, expectedX, "Wrong x coordinate of " + prettyAccName);
+  is(y, expectedY, "Wrong y coordinate of " + prettyAccName);
+  is(width, expectedWidth, "Wrong width of " + prettyAccName);
+  ok(height >= expectedHeight, "Wrong height of " + prettyAccName);
+}
+
+async function runTests(browser, accDoc) {
+  let p1 = findAccessibleChildByID(accDoc, "p1");
+  let p2 = findAccessibleChildByID(accDoc, "p2");
+  let imgmap = findAccessibleChildByID(accDoc, "imgmap");
+  if (!imgmap.childCount) {
+    // An image map may not be available even after the doc and image load
+    // is complete. We don't recieve any DOM events for this change either,
+    // so we need to wait for a REORDER.
+    await waitForEvent(EVENT_REORDER, "imgmap");
+  }
+  let area = imgmap.firstChild;
+
+  await testContentBounds(browser, p1);
+  await testContentBounds(browser, p2);
+  await testContentBounds(browser, area);
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+    Layout.zoomDocument(content.document, 2.0);
+  });
+
+  await testContentBounds(browser, p1);
+  await testContentBounds(browser, p2);
+  await testContentBounds(browser, area);
+}
+
+/**
+ * Test accessible boundaries when page is zoomed
+ */
+addAccessibleTask(
+  `
+<p id="p1">para 1</p><p id="p2">para 2</p>
+<map name="atoz_map" id="map">
+  <area id="area1" href="http://mozilla.org"
+        coords=17,0,30,14" alt="mozilla.org" shape="rect">
+</map>
+<img id="imgmap" width="447" height="15"
+     usemap="#atoz_map"
+     src="http://example.com/a11y/accessible/tests/mochitest/letters.gif">`,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/bounds/browser_test_zoom_text.js b/accessible/tests/browser/bounds/browser_test_zoom_text.js
new file mode 100644
index 0000000000..8abbff025d
--- /dev/null
+++ b/accessible/tests/browser/bounds/browser_test_zoom_text.js
@@ -0,0 +1,76 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/layout.js */
+
+async function runTests(browser, accDoc) {
+  async function testTextNode(id) {
+    let hyperTextNode = findAccessibleChildByID(accDoc, id);
+    let textNode = hyperTextNode.firstChild;
+
+    let contentDPR = await getContentDPR(browser);
+    let [x, y, width, height] = getBounds(textNode, contentDPR);
+    testTextBounds(
+      hyperTextNode,
+      0,
+      -1,
+      [x, y, width, height],
+      COORDTYPE_SCREEN_RELATIVE
+    );
+  }
+
+  async function testEmptyInputNode(id) {
+    let inputNode = findAccessibleChildByID(accDoc, id);
+
+    let [x, y, width, height] = getBounds(inputNode);
+    testTextBounds(
+      inputNode,
+      0,
+      -1,
+      [x, y, width, height],
+      COORDTYPE_SCREEN_RELATIVE
+    );
+    testTextBounds(
+      inputNode,
+      0,
+      0,
+      [x, y, width, height],
+      COORDTYPE_SCREEN_RELATIVE
+    );
+  }
+
+  await testTextNode("p1");
+  await testTextNode("p2");
+  await testEmptyInputNode("i1");
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+    Layout.zoomDocument(content.document, 2.0);
+  });
+
+  await testTextNode("p1");
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+    Layout.zoomDocument(content.document, 1.0);
+  });
+}
+
+/**
+ * Test the text range boundary when page is zoomed
+ */
+addAccessibleTask(
+  `
+  <p id='p1' style='font-family: monospace;'>Tilimilitryamdiya</p>
+  <p id='p2'>ل</p>
+  <form><input id='i1' /></form>`,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/bounds/head.js b/accessible/tests/browser/bounds/head.js
new file mode 100644
index 0000000000..f4d20e636c
--- /dev/null
+++ b/accessible/tests/browser/bounds/head.js
@@ -0,0 +1,21 @@
+/* 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";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "layout.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
diff --git a/accessible/tests/browser/browser.ini b/accessible/tests/browser/browser.ini
new file mode 100644
index 0000000000..99acf3c0b0
--- /dev/null
+++ b/accessible/tests/browser/browser.ini
@@ -0,0 +1,34 @@
+[DEFAULT]
+skip-if = a11y_checks || (os == 'win' && processor == 'aarch64') # 1534855
+support-files =
+  !/accessible/tests/mochitest/*.js
+  *.jsm
+  head.js
+  shared-head.js
+
+[browser_shutdown_acc_reference.js]
+skip-if = (os == 'linux' && debug && bits == 64) #Bug 1421307
+[browser_shutdown_doc_acc_reference.js]
+[browser_shutdown_multi_acc_reference_obj.js]
+[browser_shutdown_multi_acc_reference_doc.js]
+[browser_shutdown_multi_reference.js]
+[browser_shutdown_parent_own_reference.js]
+skip-if = !e10s || (verify && debug && (os == 'win')) # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_pref.js]
+[browser_shutdown_proxy_acc_reference.js]
+skip-if = !e10s || (os == 'win') # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_proxy_doc_acc_reference.js]
+skip-if = !e10s || (os == 'win') || (verify && debug) # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_multi_proxy_acc_reference_doc.js]
+skip-if = !e10s || (os == 'win') || (verify && debug && (os == 'linux')) # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_multi_proxy_acc_reference_obj.js]
+skip-if = !e10s || (os == 'win') || (verify && debug && (os == 'linux')) # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_remote_no_reference.js]
+skip-if = !e10s || (verify && debug && (os == 'win')) # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_remote_only.js]
+skip-if = !e10s # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_remote_own_reference.js]
+skip-if = !e10s # e10s specific test for a11y start/shutdown between parent and content.
+[browser_shutdown_scope_lifecycle.js]
+[browser_shutdown_start_restart.js]
+skip-if = (verify && debug)
diff --git a/accessible/tests/browser/browser_shutdown_acc_reference.js b/accessible/tests/browser/browser_shutdown_acc_reference.js
new file mode 100644
index 0000000000..68c07ba2b6
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_acc_reference.js
@@ -0,0 +1,64 @@
+/* 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";
+
+add_task(async function() {
+  // Create a11y service.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+
+  await a11yInit;
+  ok(accService, "Service initialized");
+
+  // Accessible object reference will live longer than the scope of this
+  // function.
+  let acc = await new Promise(resolve => {
+    let intervalId = setInterval(() => {
+      let tabAcc = accService.getAccessibleFor(gBrowser.selectedTab);
+      if (tabAcc) {
+        clearInterval(intervalId);
+        resolve(tabAcc);
+      }
+    }, 10);
+  });
+  ok(acc, "Accessible object is created");
+
+  let canShutdown = false;
+  // This promise will resolve only if canShutdown flag is set to true. If
+  // 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
+  // down, the promise will reject.
+  const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+  await a11yShutdownObserver;
+  const a11yShutdown = new Promise((resolve, reject) =>
+    a11yShutdownPromise.then(flag =>
+      canShutdown
+        ? resolve()
+        : reject("Accessible service was shut down incorrectly")
+    )
+  );
+
+  accService = null;
+  ok(!accService, "Service is removed");
+
+  // Force garbage collection that should not trigger shutdown because there is
+  // a reference to an accessible object.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Now allow a11y service to shutdown.
+  canShutdown = true;
+  // Remove a reference to an accessible object.
+  acc = null;
+  ok(!acc, "Accessible object is removed");
+
+  // Force garbage collection that should now trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_doc_acc_reference.js b/accessible/tests/browser/browser_shutdown_doc_acc_reference.js
new file mode 100644
index 0000000000..baf2b898e5
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_doc_acc_reference.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/. */
+
+"use strict";
+
+add_task(async function() {
+  // Create a11y service.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+
+  await a11yInit;
+  ok(accService, "Service initialized");
+
+  // Accessible document reference will live longer than the scope of this
+  // function.
+  let docAcc = accService.getAccessibleFor(document);
+  ok(docAcc, "Accessible document is created");
+
+  let canShutdown = false;
+  // This promise will resolve only if canShutdown flag is set to true. If
+  // 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
+  // down, the promise will reject.
+  const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+  await a11yShutdownObserver;
+  const a11yShutdown = new Promise((resolve, reject) =>
+    a11yShutdownPromise.then(flag =>
+      canShutdown
+        ? resolve()
+        : reject("Accessible service was shut down incorrectly")
+    )
+  );
+
+  accService = null;
+  ok(!accService, "Service is removed");
+
+  // Force garbage collection that should not trigger shutdown because there is
+  // a reference to an accessible document.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Now allow a11y service to shutdown.
+  canShutdown = true;
+  // Remove a reference to an accessible document.
+  docAcc = null;
+  ok(!docAcc, "Accessible document is removed");
+
+  // Force garbage collection that should now trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_multi_acc_reference_doc.js b/accessible/tests/browser/browser_shutdown_multi_acc_reference_doc.js
new file mode 100644
index 0000000000..b67b2f46f7
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_multi_acc_reference_doc.js
@@ -0,0 +1,76 @@
+/* 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";
+
+add_task(async function() {
+  // Create a11y service.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+
+  await a11yInit;
+  ok(accService, "Service initialized");
+
+  let docAcc = accService.getAccessibleFor(document);
+  ok(docAcc, "Accessible document is created");
+
+  // Accessible object reference will live longer than the scope of this
+  // function.
+  let acc = await new Promise(resolve => {
+    let intervalId = setInterval(() => {
+      let tabAcc = accService.getAccessibleFor(gBrowser.selectedTab);
+      if (tabAcc) {
+        clearInterval(intervalId);
+        resolve(tabAcc);
+      }
+    }, 10);
+  });
+  ok(acc, "Accessible object is created");
+
+  let canShutdown = false;
+  // This promise will resolve only if canShutdown flag is set to true. If
+  // 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
+  // down, the promise will reject.
+  const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+  await a11yShutdownObserver;
+  const a11yShutdown = new Promise((resolve, reject) =>
+    a11yShutdownPromise.then(flag =>
+      canShutdown
+        ? resolve()
+        : reject("Accessible service was shut down incorrectly")
+    )
+  );
+
+  accService = null;
+  ok(!accService, "Service is removed");
+
+  // Force garbage collection that should not trigger shutdown because there are
+  // references to accessible objects.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Remove a reference to an accessible object.
+  acc = null;
+  ok(!acc, "Accessible object is removed");
+  // Force garbage collection that should not trigger shutdown because there is
+  // a reference to an accessible document.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Now allow a11y service to shutdown.
+  canShutdown = true;
+  // Remove a reference to an accessible document.
+  docAcc = null;
+  ok(!docAcc, "Accessible document is removed");
+
+  // Force garbage collection that should now trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_multi_acc_reference_obj.js b/accessible/tests/browser/browser_shutdown_multi_acc_reference_obj.js
new file mode 100644
index 0000000000..18160a8db7
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_multi_acc_reference_obj.js
@@ -0,0 +1,76 @@
+/* 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";
+
+add_task(async function() {
+  // Create a11y service.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+
+  await a11yInit;
+  ok(accService, "Service initialized");
+
+  let docAcc = accService.getAccessibleFor(document);
+  ok(docAcc, "Accessible document is created");
+
+  // Accessible object reference will live longer than the scope of this
+  // function.
+  let acc = await new Promise(resolve => {
+    let intervalId = setInterval(() => {
+      let tabAcc = accService.getAccessibleFor(gBrowser.selectedTab);
+      if (tabAcc) {
+        clearInterval(intervalId);
+        resolve(tabAcc);
+      }
+    }, 10);
+  });
+  ok(acc, "Accessible object is created");
+
+  let canShutdown = false;
+  // This promise will resolve only if canShutdown flag is set to true. If
+  // 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
+  // down, the promise will reject.
+  const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+  await a11yShutdownObserver;
+  const a11yShutdown = new Promise((resolve, reject) =>
+    a11yShutdownPromise.then(flag =>
+      canShutdown
+        ? resolve()
+        : reject("Accessible service was shut down incorrectly")
+    )
+  );
+
+  accService = null;
+  ok(!accService, "Service is removed");
+
+  // Force garbage collection that should not trigger shutdown because there are
+  // references to accessible objects.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Remove a reference to an accessible document.
+  docAcc = null;
+  ok(!docAcc, "Accessible document is removed");
+  // Force garbage collection that should not trigger shutdown because there is
+  // a reference to an accessible object.
+  forceGC();
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Now allow a11y service to shutdown.
+  canShutdown = true;
+  // Remove a reference to an accessible object.
+  acc = null;
+  ok(!acc, "Accessible object is removed");
+
+  // Force garbage collection that should now trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_doc.js b/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_doc.js
new file mode 100644
index 0000000000..8763327bae
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_doc.js
@@ -0,0 +1,90 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  let docLoaded = waitForEvent(
+    Ci.nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_COMPLETE,
+    "body"
+  );
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  ok(accService, "Service initialized");
+  await a11yInit;
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body id="body"><div id="div"></div></body>
+      </html>`,
+    },
+    async function(browser) {
+      let docLoadedEvent = await docLoaded;
+      let docAcc = docLoadedEvent.accessibleDocument;
+      ok(docAcc, "Accessible document proxy is created");
+      // Remove unnecessary dangling references
+      docLoaded = null;
+      docLoadedEvent = null;
+      forceGC();
+
+      let acc = docAcc.getChildAt(0);
+      ok(acc, "Accessible proxy is created");
+
+      let canShutdown = false;
+      const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+      await a11yShutdownObserver;
+      const a11yShutdown = new Promise((resolve, reject) =>
+        a11yShutdownPromise.then(flag =>
+          canShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+
+      accService = null;
+      ok(!accService, "Service is removed");
+      // Force garbage collection that should not trigger shutdown because there
+      // is a reference to an accessible proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Remove a reference to an accessible proxy.
+      acc = null;
+      ok(!acc, "Accessible proxy is removed");
+      // Force garbage collection that should not trigger shutdown because there is
+      // a reference to an accessible document proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Now allow a11y service to shutdown.
+      canShutdown = true;
+      // Remove a last reference to an accessible document proxy.
+      docAcc = null;
+      ok(!docAcc, "Accessible document proxy is removed");
+
+      // Force garbage collection that should now trigger shutdown.
+      forceGC();
+      await a11yShutdown;
+    }
+  );
+
+  // Unsetting e10s related preferences.
+  await unsetE10sPrefs();
+});
diff --git a/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_obj.js b/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_obj.js
new file mode 100644
index 0000000000..5134901355
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_multi_proxy_acc_reference_obj.js
@@ -0,0 +1,90 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  let docLoaded = waitForEvent(
+    Ci.nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_COMPLETE,
+    "body"
+  );
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  ok(accService, "Service initialized");
+  await a11yInit;
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body id="body"><div id="div"></div></body>
+      </html>`,
+    },
+    async function(browser) {
+      let docLoadedEvent = await docLoaded;
+      let docAcc = docLoadedEvent.accessibleDocument;
+      ok(docAcc, "Accessible document proxy is created");
+      // Remove unnecessary dangling references
+      docLoaded = null;
+      docLoadedEvent = null;
+      forceGC();
+
+      let acc = docAcc.getChildAt(0);
+      ok(acc, "Accessible proxy is created");
+
+      let canShutdown = false;
+      const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+      await a11yShutdownObserver;
+      const a11yShutdown = new Promise((resolve, reject) =>
+        a11yShutdownPromise.then(flag =>
+          canShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+
+      accService = null;
+      ok(!accService, "Service is removed");
+      // Force garbage collection that should not trigger shutdown because there
+      // is a reference to an accessible proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Remove a reference to an accessible document proxy.
+      docAcc = null;
+      ok(!docAcc, "Accessible document proxy is removed");
+      // Force garbage collection that should not trigger shutdown because there is
+      // a reference to an accessible proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Now allow a11y service to shutdown.
+      canShutdown = true;
+      // Remove a last reference to an accessible proxy.
+      acc = null;
+      ok(!acc, "Accessible proxy is removed");
+
+      // Force garbage collection that should now trigger shutdown.
+      forceGC();
+      await a11yShutdown;
+    }
+  );
+
+  // Unsetting e10s related preferences.
+  await unsetE10sPrefs();
+});
diff --git a/accessible/tests/browser/browser_shutdown_multi_reference.js b/accessible/tests/browser/browser_shutdown_multi_reference.js
new file mode 100644
index 0000000000..cd0bc0d103
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_multi_reference.js
@@ -0,0 +1,58 @@
+/* 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";
+
+add_task(async function() {
+  info("Creating a service");
+  // Create a11y service.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService1 = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  await a11yInit;
+  ok(accService1, "Service initialized");
+
+  // Add another reference to a11y service. This will not trigger
+  // 'a11y-init-or-shutdown' event
+  let accService2 = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  ok(accService2, "Service initialized");
+
+  info("Removing all service references");
+  let canShutdown = false;
+  // This promise will resolve only if canShutdown flag is set to true. If
+  // 'a11y-init-or-shutdown' event with '0' flag comes before it can be shut
+  // down, the promise will reject.
+  const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+  await a11yShutdownObserver;
+  const a11yShutdown = new Promise((resolve, reject) =>
+    a11yShutdownPromise.then(flag =>
+      canShutdown
+        ? resolve()
+        : reject("Accessible service was shut down incorrectly")
+    )
+  );
+  // Remove first a11y service reference.
+  accService1 = null;
+  ok(!accService1, "Service is removed");
+  // Force garbage collection that should not trigger shutdown because there is
+  // another reference.
+  forceGC();
+
+  // Have some breathing room when removing a11y service references.
+  await TestUtils.waitForTick();
+
+  // Now allow a11y service to shutdown.
+  canShutdown = true;
+  // Remove last a11y service reference.
+  accService2 = null;
+  ok(!accService2, "Service is removed");
+  // Force garbage collection that should trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_parent_own_reference.js b/accessible/tests/browser/browser_shutdown_parent_own_reference.js
new file mode 100644
index 0000000000..86115fdaad
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_parent_own_reference.js
@@ -0,0 +1,104 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body></body>
+      </html>`,
+    },
+    async function(browser) {
+      info(
+        "Creating a service in parent and waiting for service to be created " +
+          "in content"
+      );
+      await loadContentScripts(browser, "Common.jsm");
+      // Create a11y service in the main process. This will trigger creating of
+      // the a11y service in parent as well.
+      const [parentA11yInitObserver, parentA11yInit] = initAccService();
+      const [contentA11yInitObserver, contentA11yInit] = initAccService(
+        browser
+      );
+
+      await Promise.all([parentA11yInitObserver, contentA11yInitObserver]);
+
+      let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+        Ci.nsIAccessibilityService
+      );
+      ok(accService, "Service initialized in parent");
+      await Promise.all([parentA11yInit, contentA11yInit]);
+
+      info(
+        "Adding additional reference to accessibility service in content " +
+          "process"
+      );
+      // Add a new reference to the a11y service inside the content process.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.accService;
+      });
+
+      info(
+        "Trying to shut down a service in content and making sure it stays " +
+          "alive as it was started by parent"
+      );
+      let contentCanShutdown = false;
+      // This promise will resolve only if contentCanShutdown flag is set to true.
+      // If 'a11y-init-or-shutdown' event with '0' flag (in content) comes before
+      // it can be shut down, the promise will reject.
+      const [
+        contentA11yShutdownObserver,
+        contentA11yShutdownPromise,
+      ] = shutdownAccService(browser);
+      await contentA11yShutdownObserver;
+      const contentA11yShutdown = new Promise((resolve, reject) =>
+        contentA11yShutdownPromise.then(flag =>
+          contentCanShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+      // Remove a11y service reference in content and force garbage collection.
+      // This should not trigger shutdown since a11y was originally initialized by
+      // the main process.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.clearAccService();
+      });
+
+      // Have some breathing room between a11y service shutdowns.
+      await TestUtils.waitForTick();
+
+      info("Removing a service in parent");
+      // Now allow a11y service to shutdown in content.
+      contentCanShutdown = true;
+      // Remove the a11y service reference in the main process.
+      const [
+        parentA11yShutdownObserver,
+        parentA11yShutdown,
+      ] = shutdownAccService();
+      await parentA11yShutdownObserver;
+
+      accService = null;
+      ok(!accService, "Service is removed in parent");
+      // Force garbage collection that should trigger shutdown in both parent and
+      // content.
+      forceGC();
+      await Promise.all([parentA11yShutdown, contentA11yShutdown]);
+
+      // Unsetting e10s related preferences.
+      await unsetE10sPrefs();
+    }
+  );
+});
diff --git a/accessible/tests/browser/browser_shutdown_pref.js b/accessible/tests/browser/browser_shutdown_pref.js
new file mode 100644
index 0000000000..74cef28b03
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_pref.js
@@ -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/. */
+
+"use strict";
+
+const PREF_ACCESSIBILITY_FORCE_DISABLED = "accessibility.force_disabled";
+
+add_task(async function testForceDisable() {
+  ok(
+    !Services.appinfo.accessibilityEnabled,
+    "Accessibility is disabled by default"
+  );
+
+  info("Reset force disabled preference");
+  Services.prefs.clearUserPref(PREF_ACCESSIBILITY_FORCE_DISABLED);
+
+  info("Enable accessibility service via XPCOM");
+  let [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  await a11yInit;
+  ok(Services.appinfo.accessibilityEnabled, "Accessibility is enabled");
+
+  info("Force disable a11y service via preference");
+  let [a11yShutdownObserver, a11yShutdown] = shutdownAccService();
+  await a11yShutdownObserver;
+
+  Services.prefs.setIntPref(PREF_ACCESSIBILITY_FORCE_DISABLED, 1);
+  await a11yShutdown;
+  ok(!Services.appinfo.accessibilityEnabled, "Accessibility is disabled");
+
+  info("Attempt to get an instance of a11y service and call its method.");
+  accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  try {
+    accService.getAccesssibleFor(document);
+    ok(false, "getAccesssibleFor should've triggered an exception.");
+  } catch (e) {
+    ok(
+      true,
+      "getAccesssibleFor triggers an exception as a11y service is shutdown."
+    );
+  }
+  ok(!Services.appinfo.accessibilityEnabled, "Accessibility is disabled");
+
+  info("Reset force disabled preference");
+  Services.prefs.clearUserPref(PREF_ACCESSIBILITY_FORCE_DISABLED);
+
+  info("Create a11y service again");
+  [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  await a11yInit;
+  ok(Services.appinfo.accessibilityEnabled, "Accessibility is enabled");
+
+  info("Remove all references to a11y service");
+  [a11yShutdownObserver, a11yShutdown] = shutdownAccService();
+  await a11yShutdownObserver;
+
+  accService = null;
+  forceGC();
+  await a11yShutdown;
+  ok(!Services.appinfo.accessibilityEnabled, "Accessibility is disabled");
+});
diff --git a/accessible/tests/browser/browser_shutdown_proxy_acc_reference.js b/accessible/tests/browser/browser_shutdown_proxy_acc_reference.js
new file mode 100644
index 0000000000..d6fa715cf3
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_proxy_acc_reference.js
@@ -0,0 +1,76 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  ok(accService, "Service initialized");
+  await a11yInit;
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body><div id="div" style="visibility: hidden;"></div></body>
+      </html>`,
+    },
+    async function(browser) {
+      let onShow = waitForEvent(Ci.nsIAccessibleEvent.EVENT_SHOW, "div");
+      await invokeSetStyle(browser, "div", "visibility", "visible");
+      let showEvent = await onShow;
+      let divAcc = showEvent.accessible;
+      ok(divAcc, "Accessible proxy is created");
+      // Remove unnecessary dangling references
+      onShow = null;
+      showEvent = null;
+      forceGC();
+
+      let canShutdown = false;
+      const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+      await a11yShutdownObserver;
+      const a11yShutdown = new Promise((resolve, reject) =>
+        a11yShutdownPromise.then(flag =>
+          canShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+
+      accService = null;
+      ok(!accService, "Service is removed");
+      // Force garbage collection that should not trigger shutdown because there
+      // is a reference to an accessible proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Now allow a11y service to shutdown.
+      canShutdown = true;
+      // Remove a last reference to an accessible proxy.
+      divAcc = null;
+      ok(!divAcc, "Accessible proxy is removed");
+
+      // Force garbage collection that should now trigger shutdown.
+      forceGC();
+      await a11yShutdown;
+    }
+  );
+
+  // Unsetting e10s related preferences.
+  await unsetE10sPrefs();
+});
diff --git a/accessible/tests/browser/browser_shutdown_proxy_doc_acc_reference.js b/accessible/tests/browser/browser_shutdown_proxy_doc_acc_reference.js
new file mode 100644
index 0000000000..1dc2344acb
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_proxy_doc_acc_reference.js
@@ -0,0 +1,78 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  let docLoaded = waitForEvent(
+    Ci.nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_COMPLETE,
+    "body"
+  );
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  ok(accService, "Service initialized");
+  await a11yInit;
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body id="body"></body>
+      </html>`,
+    },
+    async function(browser) {
+      let docLoadedEvent = await docLoaded;
+      let docAcc = docLoadedEvent.accessibleDocument;
+      ok(docAcc, "Accessible document proxy is created");
+      // Remove unnecessary dangling references
+      docLoaded = null;
+      docLoadedEvent = null;
+      forceGC();
+
+      let canShutdown = false;
+      const [a11yShutdownObserver, a11yShutdownPromise] = shutdownAccService();
+      await a11yShutdownObserver;
+      const a11yShutdown = new Promise((resolve, reject) =>
+        a11yShutdownPromise.then(flag =>
+          canShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+
+      accService = null;
+      ok(!accService, "Service is removed");
+      // Force garbage collection that should not trigger shutdown because there
+      // is a reference to an accessible proxy.
+      forceGC();
+      // Have some breathing room when removing a11y service references.
+      await TestUtils.waitForTick();
+
+      // Now allow a11y service to shutdown.
+      canShutdown = true;
+      // Remove a last reference to an accessible document proxy.
+      docAcc = null;
+      ok(!docAcc, "Accessible document proxy is removed");
+
+      // Force garbage collection that should now trigger shutdown.
+      forceGC();
+      await a11yShutdown;
+    }
+  );
+
+  // Unsetting e10s related preferences.
+  await unsetE10sPrefs();
+});
diff --git a/accessible/tests/browser/browser_shutdown_remote_no_reference.js b/accessible/tests/browser/browser_shutdown_remote_no_reference.js
new file mode 100644
index 0000000000..cce695579d
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_remote_no_reference.js
@@ -0,0 +1,151 @@
+/* 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";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body></body>
+      </html>`,
+    },
+    async function(browser) {
+      info(
+        "Creating a service in parent and waiting for service to be created " +
+          "in content"
+      );
+      await loadContentScripts(browser, "Common.jsm");
+      // Create a11y service in the main process. This will trigger creating of
+      // the a11y service in parent as well.
+      const [parentA11yInitObserver, parentA11yInit] = initAccService();
+      const [contentA11yInitObserver, contentA11yInit] = initAccService(
+        browser
+      );
+      let [
+        parentConsumersChangedObserver,
+        parentConsumersChanged,
+      ] = accConsumersChanged();
+      let [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+
+      await Promise.all([
+        parentA11yInitObserver,
+        contentA11yInitObserver,
+        parentConsumersChangedObserver,
+        contentConsumersChangedObserver,
+      ]);
+
+      let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+        Ci.nsIAccessibilityService
+      );
+      ok(accService, "Service initialized in parent");
+      await Promise.all([parentA11yInit, contentA11yInit]);
+      await parentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: true,
+            MainProcess: false,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in parent are correct."
+        )
+      );
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: false,
+            MainProcess: true,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in content are correct."
+        )
+      );
+
+      Assert.deepEqual(
+        JSON.parse(accService.getConsumers()),
+        {
+          XPCOM: true,
+          MainProcess: false,
+          PlatformAPI: false,
+        },
+        "Accessibility service consumers in parent are correct."
+      );
+
+      info(
+        "Removing a service in parent and waiting for service to be shut " +
+          "down in content"
+      );
+      // Remove a11y service reference in the main process.
+      const [
+        parentA11yShutdownObserver,
+        parentA11yShutdown,
+      ] = shutdownAccService();
+      const [
+        contentA11yShutdownObserver,
+        contentA11yShutdown,
+      ] = shutdownAccService(browser);
+      [
+        parentConsumersChangedObserver,
+        parentConsumersChanged,
+      ] = accConsumersChanged();
+      [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+
+      await Promise.all([
+        parentA11yShutdownObserver,
+        contentA11yShutdownObserver,
+        parentConsumersChangedObserver,
+        contentConsumersChangedObserver,
+      ]);
+
+      accService = null;
+      ok(!accService, "Service is removed in parent");
+      // Force garbage collection that should trigger shutdown in both main and
+      // content process.
+      forceGC();
+      await Promise.all([parentA11yShutdown, contentA11yShutdown]);
+      await parentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: false,
+            MainProcess: false,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers are correct."
+        )
+      );
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: false,
+            MainProcess: false,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers are correct."
+        )
+      );
+    }
+  );
+
+  // Unsetting e10s related preferences.
+  await unsetE10sPrefs();
+});
diff --git a/accessible/tests/browser/browser_shutdown_remote_only.js b/accessible/tests/browser/browser_shutdown_remote_only.js
new file mode 100644
index 0000000000..8798170c05
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_remote_only.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/. */
+
+"use strict";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body></body>
+      </html>`,
+    },
+    async function(browser) {
+      info("Creating a service in content");
+      await loadContentScripts(browser, "Common.jsm");
+      // Create a11y service in the content process.
+      const [a11yInitObserver, a11yInit] = initAccService(browser);
+      await a11yInitObserver;
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.accService;
+      });
+      await a11yInit;
+      ok(
+        true,
+        "Accessibility service is started in content process correctly."
+      );
+
+      info("Removing a service in content");
+      // Remove a11y service reference from the content process.
+      const [a11yShutdownObserver, a11yShutdown] = shutdownAccService(browser);
+      await a11yShutdownObserver;
+      // Force garbage collection that should trigger shutdown.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.clearAccService();
+      });
+      await a11yShutdown;
+      ok(
+        true,
+        "Accessibility service is shutdown in content process correctly."
+      );
+
+      // Unsetting e10s related preferences.
+      await unsetE10sPrefs();
+    }
+  );
+});
diff --git a/accessible/tests/browser/browser_shutdown_remote_own_reference.js b/accessible/tests/browser/browser_shutdown_remote_own_reference.js
new file mode 100644
index 0000000000..2d88e5ed85
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_remote_own_reference.js
@@ -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/. */
+
+"use strict";
+
+add_task(async function() {
+  // Making sure that the e10s is enabled on Windows for testing.
+  await setE10sPrefs();
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: `data:text/html,
+      <html>
+        <head>
+          <meta charset="utf-8"/>
+          <title>Accessibility Test</title>
+        </head>
+        <body></body>
+      </html>`,
+    },
+    async function(browser) {
+      info(
+        "Creating a service in parent and waiting for service to be created " +
+          "in content"
+      );
+      await loadContentScripts(browser, "Common.jsm");
+      // Create a11y service in the main process. This will trigger creating of
+      // the a11y service in parent as well.
+      const [parentA11yInitObserver, parentA11yInit] = initAccService();
+      const [contentA11yInitObserver, contentA11yInit] = initAccService(
+        browser
+      );
+      let [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+
+      await Promise.all([
+        parentA11yInitObserver,
+        contentA11yInitObserver,
+        contentConsumersChangedObserver,
+      ]);
+
+      let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+        Ci.nsIAccessibilityService
+      );
+      ok(accService, "Service initialized in parent");
+      await Promise.all([parentA11yInit, contentA11yInit]);
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: false,
+            MainProcess: true,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in content are correct."
+        )
+      );
+
+      info(
+        "Adding additional reference to accessibility service in content " +
+          "process"
+      );
+      [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+      await contentConsumersChangedObserver;
+      // Add a new reference to the a11y service inside the content process.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.accService;
+      });
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: true,
+            MainProcess: true,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in content are correct."
+        )
+      );
+
+      const contentConsumers = await SpecialPowers.spawn(browser, [], () =>
+        content.CommonUtils.accService.getConsumers()
+      );
+      Assert.deepEqual(
+        JSON.parse(contentConsumers),
+        {
+          XPCOM: true,
+          MainProcess: true,
+          PlatformAPI: false,
+        },
+        "Accessibility service consumers in parent are correct."
+      );
+
+      info(
+        "Shutting down a service in parent and making sure the one in " +
+          "content stays alive"
+      );
+      let contentCanShutdown = false;
+      const [
+        parentA11yShutdownObserver,
+        parentA11yShutdown,
+      ] = shutdownAccService();
+      [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+      // This promise will resolve only if contentCanShutdown flag is set to true.
+      // If 'a11y-init-or-shutdown' event with '0' flag (in content) comes before
+      // it can be shut down, the promise will reject.
+      const [
+        contentA11yShutdownObserver,
+        contentA11yShutdownPromise,
+      ] = shutdownAccService(browser);
+      const contentA11yShutdown = new Promise((resolve, reject) =>
+        contentA11yShutdownPromise.then(flag =>
+          contentCanShutdown
+            ? resolve()
+            : reject("Accessible service was shut down incorrectly")
+        )
+      );
+
+      await Promise.all([
+        parentA11yShutdownObserver,
+        contentA11yShutdownObserver,
+        contentConsumersChangedObserver,
+      ]);
+      // Remove a11y service reference in the main process and force garbage
+      // collection. This should not trigger shutdown in content since a11y
+      // service is used by XPCOM.
+      accService = null;
+      ok(!accService, "Service is removed in parent");
+      // Force garbage collection that should not trigger shutdown because there
+      // is a reference in a content process.
+      forceGC();
+      await SpecialPowers.spawn(browser, [], () => {
+        SpecialPowers.Cu.forceGC();
+      });
+      await parentA11yShutdown;
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: true,
+            MainProcess: false,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in content are correct."
+        )
+      );
+
+      // Have some breathing room between a11y service shutdowns.
+      await TestUtils.waitForTick();
+
+      info("Removing a service in content");
+      // Now allow a11y service to shutdown in content.
+      contentCanShutdown = true;
+      [
+        contentConsumersChangedObserver,
+        contentConsumersChanged,
+      ] = accConsumersChanged(browser);
+      await contentConsumersChangedObserver;
+      // Remove last reference to a11y service in content and force garbage
+      // collection that should trigger shutdown.
+      await SpecialPowers.spawn(browser, [], () => {
+        content.CommonUtils.clearAccService();
+      });
+      await contentA11yShutdown;
+      await contentConsumersChanged.then(data =>
+        Assert.deepEqual(
+          data,
+          {
+            XPCOM: false,
+            MainProcess: false,
+            PlatformAPI: false,
+          },
+          "Accessibility service consumers in content are correct."
+        )
+      );
+
+      // Unsetting e10s related preferences.
+      await unsetE10sPrefs();
+    }
+  );
+});
diff --git a/accessible/tests/browser/browser_shutdown_scope_lifecycle.js b/accessible/tests/browser/browser_shutdown_scope_lifecycle.js
new file mode 100644
index 0000000000..b4dad44de8
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_scope_lifecycle.js
@@ -0,0 +1,28 @@
+/* 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";
+
+add_task(async function() {
+  // Create a11y service inside of the function scope. Its reference should be
+  // released once the anonimous function is called.
+  const [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+  const a11yInitThenShutdown = a11yInit.then(async () => {
+    const [a11yShutdownObserver, a11yShutdown] = shutdownAccService();
+    await a11yShutdownObserver;
+    return a11yShutdown;
+  });
+
+  (function() {
+    let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+      Ci.nsIAccessibilityService
+    );
+    ok(accService, "Service initialized");
+  })();
+
+  // Force garbage collection that should trigger shutdown.
+  forceGC();
+  await a11yInitThenShutdown;
+});
diff --git a/accessible/tests/browser/browser_shutdown_start_restart.js b/accessible/tests/browser/browser_shutdown_start_restart.js
new file mode 100644
index 0000000000..bac7a61da7
--- /dev/null
+++ b/accessible/tests/browser/browser_shutdown_start_restart.js
@@ -0,0 +1,51 @@
+/* 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";
+
+add_task(async function() {
+  info("Creating a service");
+  // Create a11y service.
+  let [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  await a11yInit;
+  ok(accService, "Service initialized");
+
+  info("Removing a service");
+  // Remove the only reference to an a11y service.
+  let [a11yShutdownObserver, a11yShutdown] = shutdownAccService();
+  await a11yShutdownObserver;
+
+  accService = null;
+  ok(!accService, "Service is removed");
+  // Force garbage collection that should trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+
+  info("Recreating a service");
+  // Re-create a11y service.
+  [a11yInitObserver, a11yInit] = initAccService();
+  await a11yInitObserver;
+
+  accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+  await a11yInit;
+  ok(accService, "Service initialized again");
+
+  info("Removing a service again");
+  // Remove the only reference to an a11y service again.
+  [a11yShutdownObserver, a11yShutdown] = shutdownAccService();
+  await a11yShutdownObserver;
+
+  accService = null;
+  ok(!accService, "Service is removed again");
+  // Force garbage collection that should trigger shutdown.
+  forceGC();
+  await a11yShutdown;
+});
diff --git a/accessible/tests/browser/e10s/browser.ini b/accessible/tests/browser/e10s/browser.ini
new file mode 100644
index 0000000000..a582b9b8bb
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser.ini
@@ -0,0 +1,60 @@
+[DEFAULT]
+support-files =
+  head.js
+  doc_treeupdate_ariadialog.html
+  doc_treeupdate_ariaowns.html
+  doc_treeupdate_imagemap.html
+  doc_treeupdate_removal.xhtml
+  doc_treeupdate_visibility.html
+  doc_treeupdate_whitespace.html
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+  !/accessible/tests/mochitest/moz.png
+
+# Caching tests
+[browser_caching_attributes.js]
+[browser_caching_description.js]
+[browser_caching_name.js]
+skip-if = (os == "linux" && bits == 64) || (debug && os == "mac") || (debug && os == "win") #Bug 1388256
+[browser_caching_relations.js]
+[browser_caching_states.js]
+[browser_caching_value.js]
+[browser_caching_uniqueid.js]
+
+# Events tests
+[browser_events_announcement.js]
+skip-if = e10s && os == 'win' # Bug 1288839
+[browser_events_caretmove.js]
+[browser_events_hide.js]
+[browser_events_show.js]
+[browser_events_statechange.js]
+[browser_events_textchange.js]
+[browser_events_vcchange.js]
+
+# Text tests
+[browser_text_paragraph_boundary.js]
+
+# Tree update tests
+[browser_treeupdate_ariadialog.js]
+[browser_treeupdate_ariaowns.js]
+[browser_treeupdate_canvas.js]
+skip-if = (os == 'win' && os_version == '10.0' && bits == 64 && !debug) #Bug 1462638 - Disabled on Win10 opt/pgo for frequent failures
+[browser_treeupdate_cssoverflow.js]
+[browser_treeupdate_doc.js]
+skip-if = e10s && os == 'win' # Bug 1288839
+[browser_treeupdate_gencontent.js]
+[browser_treeupdate_hidden.js]
+[browser_treeupdate_imagemap.js]
+[browser_treeupdate_list.js]
+[browser_treeupdate_list_editabledoc.js]
+[browser_treeupdate_listener.js]
+[browser_treeupdate_optgroup.js]
+[browser_treeupdate_removal.js]
+[browser_treeupdate_select_dropdown.js]
+[browser_treeupdate_table.js]
+[browser_treeupdate_textleaf.js]
+[browser_treeupdate_visibility.js]
+[browser_treeupdate_whitespace.js]
+skip-if = true # Failing due to incorrect index of test container children on document load.
diff --git a/accessible/tests/browser/e10s/browser_caching_attributes.js b/accessible/tests/browser/e10s/browser_caching_attributes.js
new file mode 100644
index 0000000000..b8e157b068
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_attributes.js
@@ -0,0 +1,134 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/attributes.js */
+loadScripts({ name: "attributes.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Default textbox accessible attributes.
+ */
+const defaultAttributes = {
+  "margin-top": "0px",
+  "margin-right": "0px",
+  "margin-bottom": "0px",
+  "margin-left": "0px",
+  "text-align": "start",
+  "text-indent": "0px",
+  id: "textbox",
+  tag: "input",
+  display: "inline-block",
+};
+
+/**
+ * Test data has the format of:
+ * {
+ *   desc        {String}         description for better logging
+ *   expected    {Object}         expected attributes for given accessibles
+ *   unexpected  {Object}         unexpected attributes for given accessibles
+ *
+ *   action      {?AsyncFunction} an optional action that awaits a change in
+ *                                attributes
+ *   attrs       {?Array}         an optional list of attributes to update
+ *   waitFor     {?Number}        an optional event to wait for
+ * }
+ */
+const attributesTests = [
+  {
+    desc: "Initiall accessible attributes",
+    expected: defaultAttributes,
+    unexpected: {
+      "line-number": "1",
+      "explicit-name": "true",
+      "container-live": "polite",
+      live: "polite",
+    },
+  },
+  {
+    desc: "@line-number attribute is present when textbox is focused",
+    async action(browser) {
+      await invokeFocus(browser, "textbox");
+    },
+    waitFor: EVENT_FOCUS,
+    expected: Object.assign({}, defaultAttributes, { "line-number": "1" }),
+    unexpected: {
+      "explicit-name": "true",
+      "container-live": "polite",
+      live: "polite",
+    },
+  },
+  {
+    desc: "@aria-live sets container-live and live attributes",
+    attrs: [
+      {
+        attr: "aria-live",
+        value: "polite",
+      },
+    ],
+    expected: Object.assign({}, defaultAttributes, {
+      "line-number": "1",
+      "container-live": "polite",
+      live: "polite",
+    }),
+    unexpected: {
+      "explicit-name": "true",
+    },
+  },
+  {
+    desc: "@title attribute sets explicit-name attribute to true",
+    attrs: [
+      {
+        attr: "title",
+        value: "textbox",
+      },
+    ],
+    expected: Object.assign({}, defaultAttributes, {
+      "line-number": "1",
+      "explicit-name": "true",
+      "container-live": "polite",
+      live: "polite",
+    }),
+    unexpected: {},
+  },
+];
+
+/**
+ * Test caching of accessible object attributes
+ */
+addAccessibleTask(
+  `
+  <input id="textbox" value="hello">`,
+  async function(browser, accDoc) {
+    let textbox = findAccessibleChildByID(accDoc, "textbox");
+    for (let {
+      desc,
+      action,
+      attrs,
+      expected,
+      waitFor,
+      unexpected,
+    } of attributesTests) {
+      info(desc);
+      let onUpdate;
+
+      if (waitFor) {
+        onUpdate = waitForEvent(waitFor, "textbox");
+      }
+
+      if (action) {
+        await action(browser);
+      } else if (attrs) {
+        for (let { attr, value } of attrs) {
+          await invokeSetAttribute(browser, "textbox", attr, value);
+        }
+      }
+
+      await onUpdate;
+      testAttrs(textbox, expected);
+      testAbsentAttrs(textbox, unexpected);
+    }
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_description.js b/accessible/tests/browser/e10s/browser_caching_description.js
new file mode 100644
index 0000000000..5b9e70ce07
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_description.js
@@ -0,0 +1,214 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/name.js */
+loadScripts({ name: "name.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Test data has the format of:
+ * {
+ *   desc      {String}   description for better logging
+ *   expected  {String}   expected description value for a given accessible
+ *   attrs     {?Array}   an optional list of attributes to update
+ *   waitFor   {?Array}   an optional list of accessible events to wait for when
+ *                        attributes are updated
+ * }
+ */
+const tests = [
+  {
+    desc: "No description when there are no @alt, @title and @aria-describedby",
+    expected: "",
+  },
+  {
+    desc: "Description from @aria-describedby attribute",
+    attrs: [
+      {
+        attr: "aria-describedby",
+        value: "description",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "aria description",
+  },
+  {
+    desc:
+      "No description from @aria-describedby since it is the same as the " +
+      "@alt attribute which is used as the name",
+    attrs: [
+      {
+        attr: "alt",
+        value: "aria description",
+      },
+    ],
+    waitFor: [[EVENT_REORDER, matchContentDoc]],
+    expected: "",
+  },
+  {
+    desc:
+      "Description from @aria-describedby attribute when @alt and " +
+      "@aria-describedby are not the same",
+    attrs: [
+      {
+        attr: "aria-describedby",
+        value: "description2",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "another description",
+  },
+  {
+    desc:
+      "Description from @aria-describedby attribute when @title (used for " +
+      "name) and @aria-describedby are not the same",
+    attrs: [
+      {
+        attr: "alt",
+      },
+      {
+        attr: "title",
+        value: "title",
+      },
+    ],
+    waitFor: [[EVENT_REORDER, matchContentDoc]],
+    expected: "another description",
+  },
+  {
+    desc:
+      "No description from @aria-describedby since it is the same as the " +
+      "@title attribute which is used as the name",
+    attrs: [
+      {
+        attr: "title",
+        value: "another description",
+      },
+    ],
+    waitFor: [[EVENT_NAME_CHANGE, "image"]],
+    expected: "",
+  },
+  {
+    desc: "No description with only @title attribute which is used as the name",
+    attrs: [
+      {
+        attr: "aria-describedby",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "",
+  },
+  {
+    desc:
+      "Description from @title attribute when @alt and @atitle are not the " +
+      "same",
+    attrs: [
+      {
+        attr: "alt",
+        value: "aria description",
+      },
+    ],
+    waitFor: [[EVENT_REORDER, matchContentDoc]],
+    expected: "another description",
+  },
+  {
+    desc:
+      "No description from @title since it is the same as the @alt " +
+      "attribute which is used as the name",
+    attrs: [
+      {
+        attr: "alt",
+        value: "another description",
+      },
+    ],
+    waitFor: [[EVENT_NAME_CHANGE, "image"]],
+    expected: "",
+  },
+  {
+    desc:
+      "No description from @aria-describedby since it is the same as the " +
+      "@alt (used for name) and @title attributes",
+    attrs: [
+      {
+        attr: "aria-describedby",
+        value: "description2",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "",
+  },
+  {
+    desc:
+      "Description from @aria-describedby attribute when it is different " +
+      "from @alt (used for name) and @title attributes",
+    attrs: [
+      {
+        attr: "aria-describedby",
+        value: "description",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "aria description",
+  },
+  {
+    desc:
+      "No description from @aria-describedby since it is the same as the " +
+      "@alt attribute (used for name) but different from title",
+    attrs: [
+      {
+        attr: "alt",
+        value: "aria description",
+      },
+    ],
+    waitFor: [[EVENT_NAME_CHANGE, "image"]],
+    expected: "",
+  },
+  {
+    desc:
+      "Description from @aria-describedby attribute when @alt (used for " +
+      "name) and @aria-describedby are not the same but @title and " +
+      "aria-describedby are",
+    attrs: [
+      {
+        attr: "aria-describedby",
+        value: "description2",
+      },
+    ],
+    waitFor: [[EVENT_DESCRIPTION_CHANGE, "image"]],
+    expected: "another description",
+  },
+];
+
+/**
+ * Test caching of accessible object description
+ */
+addAccessibleTask(
+  `
+  <p id="description">aria description</p>
+  <p id="description2">another description</p>
+  <img id="image" />`,
+  async function(browser, accDoc) {
+    let imgAcc = findAccessibleChildByID(accDoc, "image");
+
+    for (let { desc, waitFor, attrs, expected } of tests) {
+      info(desc);
+      let onUpdate;
+      if (waitFor) {
+        onUpdate = waitForOrderedEvents(waitFor);
+      }
+      if (attrs) {
+        for (let { attr, value } of attrs) {
+          await invokeSetAttribute(browser, "image", attr, value);
+        }
+      }
+      await onUpdate;
+      // When attribute change (alt) triggers reorder event, accessible will
+      // become defunct.
+      if (isDefunct(imgAcc)) {
+        imgAcc = findAccessibleChildByID(accDoc, "image");
+      }
+      testDescr(imgAcc, expected);
+    }
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_name.js b/accessible/tests/browser/e10s/browser_caching_name.js
new file mode 100644
index 0000000000..cac05a04de
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_name.js
@@ -0,0 +1,539 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/name.js */
+loadScripts({ name: "name.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Rules for name tests that are inspired by
+ *   accessible/tests/mochitest/name/markuprules.xul
+ *
+ * Each element in the list of rules represents a name calculation rule for a
+ * particular test case.
+ *
+ * The rules have the following format:
+ *   { attr } - calculated from attribute
+ *   { elm } - calculated from another element
+ *   { fromsubtree } - calculated from element's subtree
+ *
+ *
+ * Options include:
+ *   * waitFor - changes in the subtree will result in an accessible event
+ *                     being fired, the test must only continue after the event
+ *                     is receieved.
+ */
+const ARIARule = [
+  { attr: "aria-labelledby" },
+  { attr: "aria-label", waitFor: EVENT_NAME_CHANGE },
+];
+const HTMLControlHeadRule = [...ARIARule, { elm: "label", isSibling: true }];
+const rules = {
+  CSSContent: [{ elm: "style", isSibling: true }, { fromsubtree: true }],
+  HTMLARIAGridCell: [...ARIARule, { fromsubtree: true }, { attr: "title" }],
+  HTMLControl: [
+    ...HTMLControlHeadRule,
+    { fromsubtree: true },
+    { attr: "title" },
+  ],
+  HTMLElm: [...ARIARule, { attr: "title" }],
+  HTMLImg: [
+    ...ARIARule,
+    { attr: "alt", waitFor: EVENT_NAME_CHANGE },
+    { attr: "title" },
+  ],
+  HTMLImgEmptyAlt: [...ARIARule, { attr: "title" }, { attr: "alt" }],
+  HTMLInputButton: [
+    ...HTMLControlHeadRule,
+    { attr: "value" },
+    { attr: "title" },
+  ],
+  HTMLInputImage: [
+    ...HTMLControlHeadRule,
+    { attr: "alt", waitFor: EVENT_NAME_CHANGE },
+    { attr: "value" },
+    { attr: "title" },
+  ],
+  HTMLInputImageNoValidSrc: [
+    ...HTMLControlHeadRule,
+    { attr: "alt", waitFor: EVENT_NAME_CHANGE },
+    { attr: "value" },
+  ],
+  HTMLInputReset: [
+    ...HTMLControlHeadRule,
+    { attr: "value", waitFor: EVENT_TEXT_INSERTED },
+  ],
+  HTMLInputSubmit: [
+    ...HTMLControlHeadRule,
+    { attr: "value", waitFor: EVENT_TEXT_INSERTED },
+  ],
+  HTMLLink: [...ARIARule, { fromsubtree: true }, { attr: "title" }],
+  HTMLLinkImage: [...ARIARule, { elm: "img" }, { attr: "title" }],
+  HTMLOption: [
+    ...ARIARule,
+    { attr: "label" },
+    { fromsubtree: true },
+    { attr: "title" },
+  ],
+  HTMLTable: [
+    ...ARIARule,
+    { elm: "caption" },
+    { attr: "summary" },
+    { attr: "title" },
+  ],
+};
+
+const markupTests = [
+  {
+    id: "btn",
+    ruleset: "HTMLControl",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn">test4</label>
+    <button id="btn"
+            aria-label="test1"
+            aria-labelledby="l1 l2"
+            title="test5">press me</button>`,
+    expected: ["test2 test3", "test1", "test4", "press me", "test5"],
+  },
+  {
+    id: "btn",
+    ruleset: "HTMLInputButton",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn">test4</label>
+    <input id="btn"
+           type="button"
+           aria-label="test1"
+           aria-labelledby="l1 l2"
+           value="name from value"
+           alt="no name from al"
+           src="no name from src"
+           data="no name from data"
+           title="name from title"/>`,
+    expected: [
+      "test2 test3",
+      "test1",
+      "test4",
+      "name from value",
+      "name from title",
+    ],
+  },
+  {
+    id: "btn-submit",
+    ruleset: "HTMLInputSubmit",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn-submit">test4</label>
+    <input id="btn-submit"
+           type="submit"
+           aria-label="test1"
+           aria-labelledby="l1 l2"
+           value="name from value"
+           alt="no name from atl"
+           src="no name from src"
+           data="no name from data"
+           title="no name from title"/>`,
+    expected: ["test2 test3", "test1", "test4", "name from value"],
+  },
+  {
+    id: "btn-reset",
+    ruleset: "HTMLInputReset",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn-reset">test4</label>
+    <input id="btn-reset"
+           type="reset"
+           aria-label="test1"
+           aria-labelledby="l1 l2"
+           value="name from value"
+           alt="no name from alt"
+           src="no name from src"
+           data="no name from data"
+           title="no name from title"/>`,
+    expected: ["test2 test3", "test1", "test4", "name from value"],
+  },
+  {
+    id: "btn-image",
+    ruleset: "HTMLInputImage",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn-image">test4</label>
+    <input id="btn-image"
+           type="image"
+           aria-label="test1"
+           aria-labelledby="l1 l2"
+           alt="name from alt"
+           value="name from value"
+           src="http://example.com/a11y/accessible/tests/mochitest/moz.png"
+           data="no name from data"
+           title="name from title"/>`,
+    expected: [
+      "test2 test3",
+      "test1",
+      "test4",
+      "name from alt",
+      "name from value",
+      "name from title",
+    ],
+  },
+  {
+    id: "btn-image",
+    ruleset: "HTMLInputImageNoValidSrc",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="btn-image">test4</label>
+    <input id="btn-image"
+           type="image"
+           aria-label="test1"
+           aria-labelledby="l1 l2"
+           alt="name from alt"
+           value="name from value"
+           data="no name from data"
+           title="no name from title"/>`,
+    expected: [
+      "test2 test3",
+      "test1",
+      "test4",
+      "name from alt",
+      "name from value",
+    ],
+  },
+  {
+    id: "opt",
+    ruleset: "HTMLOption",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <select>
+      <option id="opt"
+              aria-label="test1"
+              aria-labelledby="l1 l2"
+              label="test4"
+              title="test5">option1</option>
+      <option>option2</option>
+    </select>`,
+    expected: ["test2 test3", "test1", "test4", "option1", "test5"],
+  },
+  {
+    id: "img",
+    ruleset: "HTMLImg",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <img id="img"
+         aria-label="Logo of Mozilla"
+         aria-labelledby="l1 l2"
+         alt="Mozilla logo"
+         title="This is a logo"
+         src="http://example.com/a11y/accessible/tests/mochitest/moz.png"/>`,
+    expected: [
+      "test2 test3",
+      "Logo of Mozilla",
+      "Mozilla logo",
+      "This is a logo",
+    ],
+  },
+  {
+    id: "imgemptyalt",
+    ruleset: "HTMLImgEmptyAlt",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <img id="imgemptyalt"
+         aria-label="Logo of Mozilla"
+         aria-labelledby="l1 l2"
+         title="This is a logo"
+         alt=""
+         src="http://example.com/a11y/accessible/tests/mochitest/moz.png"/>`,
+    expected: ["test2 test3", "Logo of Mozilla", "This is a logo", ""],
+  },
+  {
+    id: "tc",
+    ruleset: "HTMLElm",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="tc">test4</label>
+    <table>
+      <tr>
+        <td id="tc"
+            aria-label="test1"
+            aria-labelledby="l1 l2"
+            title="test5">
+          <p>This is a paragraph</p>
+          <a href="#">This is a link</a>
+          <ul>
+            <li>This is a list</li>
+          </ul>
+        </td>
+      </tr>
+    </table>`,
+    expected: ["test2 test3", "test1", "test5"],
+  },
+  {
+    id: "gc",
+    ruleset: "HTMLARIAGridCell",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <label for="gc">test4</label>
+    <table>
+      <tr>
+        <td id="gc"
+            role="gridcell"
+            aria-label="test1"
+            aria-labelledby="l1 l2"
+            title="This is a paragraph This is a link This is a list">
+          <p>This is a paragraph</p>
+          <a href="#">This is a link</a>
+          <ul>
+            <li>Listitem1</li>
+            <li>Listitem2</li>
+          </ul>
+        </td>
+      </tr>
+    </table>`,
+    expected: [
+      "test2 test3",
+      "test1",
+      "This is a paragraph This is a link \u2022 Listitem1 \u2022 Listitem2",
+      "This is a paragraph This is a link This is a list",
+    ],
+  },
+  {
+    id: "t",
+    ruleset: "HTMLTable",
+    markup: `
+    <span id="l1">lby_tst6_1</span>
+    <span id="l2">lby_tst6_2</span>
+    <label for="t">label_tst6</label>
+    <table id="t"
+           aria-label="arialabel_tst6"
+           aria-labelledby="l1 l2"
+           summary="summary_tst6"
+           title="title_tst6">
+      <caption>caption_tst6</caption>
+      <tr>
+        <td>cell1</td>
+        <td>cell2</td>
+      </tr>
+    </table>`,
+    expected: [
+      "lby_tst6_1 lby_tst6_2",
+      "arialabel_tst6",
+      "caption_tst6",
+      "summary_tst6",
+      "title_tst6",
+    ],
+  },
+  {
+    id: "btn",
+    ruleset: "CSSContent",
+    markup: `
+    <div role="main">
+      <style>
+        button::before {
+          content: "do not ";
+        }
+      </style>
+      <button id="btn">press me</button>
+    </div>`,
+    expected: ["do not press me", "press me"],
+  },
+  {
+    // TODO: uncomment when Bug-1256382 is resoved.
+    // id: 'li',
+    // ruleset: 'CSSContent',
+    // markup: `
+    //   <style>
+    //     ul {
+    //       list-style-type: decimal;
+    //     }
+    //   </style>
+    //   <ul id="ul">
+    //     <li id="li">Listitem</li>
+    //   </ul>`,
+    // expected: ['1. Listitem', `${String.fromCharCode(0x2022)} Listitem`]
+    // }, {
+    id: "a",
+    ruleset: "HTMLLink",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <a id="a"
+       aria-label="test1"
+       aria-labelledby="l1 l2"
+       title="test4">test5</a>`,
+    expected: ["test2 test3", "test1", "test5", "test4"],
+  },
+  {
+    id: "a-img",
+    ruleset: "HTMLLinkImage",
+    markup: `
+    <span id="l1">test2</span>
+    <span id="l2">test3</span>
+    <a id="a-img"
+       aria-label="test1"
+       aria-labelledby="l1 l2"
+       title="test4"><img alt="test5"/></a>`,
+    expected: ["test2 test3", "test1", "test5", "test4"],
+  },
+];
+
+/**
+ * Test accessible name that is calculated from an attribute, remove the
+ * attribute before proceeding to the next name test. If attribute removal
+ * results in a reorder or text inserted event - wait for it. If accessible
+ * becomes defunct, update its reference using the one that is attached to one
+ * of the above events.
+ * @param {Object} browser      current "tabbrowser" element
+ * @param {Object} target       { acc, parent, id } structure that contains an
+ *                               accessible, its parent and its content element
+ *                               id.
+ * @param {Object} rule         current attr rule for name calculation
+ * @param {[type]} expected     expected name value
+ */
+async function testAttrRule(browser, target, rule, expected) {
+  let { id, parent, acc } = target;
+  let { waitFor, attr } = rule;
+
+  testName(acc, expected);
+
+  if (waitFor) {
+    let [event] = await contentSpawnMutation(
+      browser,
+      {
+        expected: [[waitFor, waitFor === EVENT_REORDER ? parent : id]],
+      },
+      (contentId, contentAttr) =>
+        content.document.getElementById(contentId).removeAttribute(contentAttr),
+      [id, attr]
+    );
+
+    // Update accessible just in case it is now defunct.
+    target.acc = findAccessibleChildByID(event.accessible, id);
+  } else {
+    await invokeSetAttribute(browser, id, attr);
+  }
+}
+
+/**
+ * Test accessible name that is calculated from an element name, remove the
+ * element before proceeding to the next name test. If element removal results
+ * in a reorder event - wait for it. If accessible becomes defunct, update its
+ * reference using the one that is attached to a possible reorder event.
+ * @param {Object} browser      current "tabbrowser" element
+ * @param {Object} target       { acc, parent, id } structure that contains an
+ *                               accessible, its parent and its content element
+ *                               id.
+ * @param {Object} rule         current elm rule for name calculation
+ * @param {[type]} expected     expected name value
+ */
+async function testElmRule(browser, target, rule, expected) {
+  let { id, parent, acc } = target;
+  let { isSibling, elm } = rule;
+
+  testName(acc, expected);
+  let [event] = await contentSpawnMutation(
+    browser,
+    {
+      expected: [[EVENT_REORDER, isSibling ? parent : id]],
+    },
+    contentElm => content.document.querySelector(`${contentElm}`).remove(),
+    [elm]
+  );
+
+  // Update accessible just in case it is now defunct.
+  target.acc = findAccessibleChildByID(event.accessible, id);
+}
+
+/**
+ * Test accessible name that is calculated from its subtree, remove the subtree
+ * and wait for a reorder event before proceeding to the next name test. If
+ * accessible becomes defunct, update its reference using the one that is
+ * attached to a reorder event.
+ * @param {Object} browser      current "tabbrowser" element
+ * @param {Object} target       { acc, parent, id } structure that contains an
+ *                               accessible, its parent and its content element
+ *                               id.
+ * @param {Object} rule         current subtree rule for name calculation
+ * @param {[type]} expected     expected name value
+ */
+async function testSubtreeRule(browser, target, rule, expected) {
+  let { id, acc } = target;
+
+  testName(acc, expected);
+  let [event] = await contentSpawnMutation(
+    browser,
+    {
+      expected: [[EVENT_REORDER, id]],
+    },
+    contentId => {
+      let elm = content.document.getElementById(contentId);
+      while (elm.firstChild) {
+        elm.firstChild.remove();
+      }
+    },
+    [id]
+  );
+
+  // Update accessible just in case it is now defunct.
+  target.acc = findAccessibleChildByID(event.accessible, id);
+}
+
+/**
+ * Iterate over a list of rules and test accessible names for each one of the
+ * rules.
+ * @param {Object} browser      current "tabbrowser" element
+ * @param {Object} target       { acc, parent, id } structure that contains an
+ *                               accessible, its parent and its content element
+ *                               id.
+ * @param {Array}  ruleset      A list of rules to test a target with
+ * @param {Array}  expected     A list of expected name value for each rule
+ */
+async function testNameRule(browser, target, ruleset, expected) {
+  for (let i = 0; i < ruleset.length; ++i) {
+    let rule = ruleset[i];
+    let testFn;
+    if (rule.attr) {
+      testFn = testAttrRule;
+    } else if (rule.elm) {
+      testFn = testElmRule;
+    } else if (rule.fromsubtree) {
+      testFn = testSubtreeRule;
+    }
+    await testFn(browser, target, rule, expected[i]);
+  }
+}
+
+markupTests.forEach(({ id, ruleset, markup, expected }) =>
+  addAccessibleTask(
+    markup,
+    async function(browser, accDoc) {
+      const observer = {
+        observe(subject, topic, data) {
+          const event = subject.QueryInterface(nsIAccessibleEvent);
+          console.log(eventToString(event));
+        },
+      };
+      Services.obs.addObserver(observer, "accessible-event");
+      // Find a target accessible from an accessible subtree.
+      let acc = findAccessibleChildByID(accDoc, id);
+      // Find target's parent accessible from an accessible subtree.
+      let parent = getAccessibleDOMNodeID(acc.parent);
+      let target = { id, parent, acc };
+      await testNameRule(browser, target, rules[ruleset], expected);
+      Services.obs.removeObserver(observer, "accessible-event");
+    },
+    { iframe: true, remoteIframe: true }
+  )
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_relations.js b/accessible/tests/browser/e10s/browser_caching_relations.js
new file mode 100644
index 0000000000..38d3a0c63b
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_relations.js
@@ -0,0 +1,96 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/relations.js */
+loadScripts({ name: "relations.js", dir: MOCHITESTS_DIR });
+
+/**
+ * A test specification that has the following format:
+ * [
+ *   attr                 relevant aria attribute
+ *   hostRelation         corresponding host relation type
+ *   dependantRelation    corresponding dependant relation type
+ * ]
+ */
+const attrRelationsSpec = [
+  ["aria-labelledby", RELATION_LABELLED_BY, RELATION_LABEL_FOR],
+  ["aria-describedby", RELATION_DESCRIBED_BY, RELATION_DESCRIPTION_FOR],
+  ["aria-controls", RELATION_CONTROLLER_FOR, RELATION_CONTROLLED_BY],
+  ["aria-flowto", RELATION_FLOWS_TO, RELATION_FLOWS_FROM],
+];
+
+async function testRelated(
+  browser,
+  accDoc,
+  attr,
+  hostRelation,
+  dependantRelation
+) {
+  let host = findAccessibleChildByID(accDoc, "host");
+  let dependant1 = findAccessibleChildByID(accDoc, "dependant1");
+  let dependant2 = findAccessibleChildByID(accDoc, "dependant2");
+
+  /**
+   * Test data has the format of:
+   * {
+   *   desc      {String}   description for better logging
+   *   attrs     {?Array}   an optional list of attributes to update
+   *   expected  {Array}    expected relation values for dependant1, dependant2
+   *                        and host respectively.
+   * }
+   */
+  const tests = [
+    {
+      desc: "No attribute",
+      expected: [null, null, null],
+    },
+    {
+      desc: "Set attribute",
+      attrs: [{ key: attr, value: "dependant1" }],
+      expected: [host, null, dependant1],
+    },
+    {
+      desc: "Change attribute",
+      attrs: [{ key: attr, value: "dependant2" }],
+      expected: [null, host, dependant2],
+    },
+    {
+      desc: "Remove attribute",
+      attrs: [{ key: attr }],
+      expected: [null, null, null],
+    },
+  ];
+
+  for (let { desc, attrs, expected } of tests) {
+    info(desc);
+
+    if (attrs) {
+      for (let { key, value } of attrs) {
+        await invokeSetAttribute(browser, "host", key, value);
+      }
+    }
+
+    testRelation(dependant1, dependantRelation, expected[0]);
+    testRelation(dependant2, dependantRelation, expected[1]);
+    testRelation(host, hostRelation, expected[2]);
+  }
+}
+
+/**
+ * Test caching of relations between accessible objects.
+ */
+addAccessibleTask(
+  `
+  <div id="dependant1">label</div>
+  <div id="dependant2">label2</div>
+  <div role="checkbox" id="host"></div>`,
+  async function(browser, accDoc) {
+    for (let spec of attrRelationsSpec) {
+      await testRelated(browser, accDoc, ...spec);
+    }
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_states.js b/accessible/tests/browser/e10s/browser_caching_states.js
new file mode 100644
index 0000000000..e6dbc33d65
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_states.js
@@ -0,0 +1,154 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test data has the format of:
+ * {
+ *   desc      {String}   description for better logging
+ *   expected  {Array}    expected states for a given accessible that have the
+ *                        following format:
+ *                          [
+ *                            expected state,
+ *                            expected extra state,
+ *                            absent state,
+ *                            absent extra state
+ *                          ]
+ *   attrs     {?Array}   an optional list of attributes to update
+ * }
+ */
+
+// State caching tests for attribute changes
+const attributeTests = [
+  {
+    desc:
+      "Checkbox with @checked attribute set to true should have checked " +
+      "state",
+    attrs: [
+      {
+        attr: "checked",
+        value: "true",
+      },
+    ],
+    expected: [STATE_CHECKED, 0],
+  },
+  {
+    desc: "Checkbox with no @checked attribute should not have checked state",
+    attrs: [
+      {
+        attr: "checked",
+      },
+    ],
+    expected: [0, 0, STATE_CHECKED],
+  },
+];
+
+// State caching tests for ARIA changes
+const ariaTests = [
+  {
+    desc: "File input has busy state when @aria-busy attribute is set to true",
+    attrs: [
+      {
+        attr: "aria-busy",
+        value: "true",
+      },
+    ],
+    expected: [STATE_BUSY, 0, STATE_REQUIRED | STATE_INVALID],
+  },
+  {
+    desc:
+      "File input has required state when @aria-required attribute is set " +
+      "to true",
+    attrs: [
+      {
+        attr: "aria-required",
+        value: "true",
+      },
+    ],
+    expected: [STATE_REQUIRED, 0, STATE_INVALID],
+  },
+  {
+    desc:
+      "File input has invalid state when @aria-invalid attribute is set to " +
+      "true",
+    attrs: [
+      {
+        attr: "aria-invalid",
+        value: "true",
+      },
+    ],
+    expected: [STATE_INVALID, 0],
+  },
+];
+
+// Extra state caching tests
+const extraStateTests = [
+  {
+    desc:
+      "Input has no extra enabled state when aria and native disabled " +
+      "attributes are set at once",
+    attrs: [
+      {
+        attr: "aria-disabled",
+        value: "true",
+      },
+      {
+        attr: "disabled",
+        value: "true",
+      },
+    ],
+    expected: [0, 0, 0, EXT_STATE_ENABLED],
+  },
+  {
+    desc:
+      "Input has an extra enabled state when aria and native disabled " +
+      "attributes are unset at once",
+    attrs: [
+      {
+        attr: "aria-disabled",
+      },
+      {
+        attr: "disabled",
+      },
+    ],
+    expected: [0, EXT_STATE_ENABLED],
+  },
+];
+
+async function runStateTests(browser, accDoc, id, tests) {
+  let acc = findAccessibleChildByID(accDoc, id);
+  for (let { desc, attrs, expected } of tests) {
+    info(desc);
+    let onUpdate = waitForEvent(EVENT_STATE_CHANGE, id);
+    for (let { attr, value } of attrs) {
+      await invokeSetAttribute(browser, id, attr, value);
+    }
+    await onUpdate;
+    testStates(acc, ...expected);
+  }
+}
+
+/**
+ * Test caching of accessible object states
+ */
+addAccessibleTask(
+  `
+  <input id="checkbox" type="checkbox">
+  <input id="file" type="file">
+  <input id="text">`,
+  async function(browser, accDoc) {
+    await runStateTests(browser, accDoc, "checkbox", attributeTests);
+    await runStateTests(browser, accDoc, "file", ariaTests);
+    await runStateTests(browser, accDoc, "text", extraStateTests);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_uniqueid.js b/accessible/tests/browser/e10s/browser_caching_uniqueid.js
new file mode 100644
index 0000000000..287f896c36
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_uniqueid.js
@@ -0,0 +1,30 @@
+/* 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";
+
+/**
+ * Test UniqueID property.
+ */
+addAccessibleTask(
+  '<div id="div"></div>',
+  async function(browser, accDoc) {
+    const div = findAccessibleChildByID(accDoc, "div");
+    const accUniqueID = await invokeContentTask(browser, [], () => {
+      const accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+        Ci.nsIAccessibilityService
+      );
+
+      return accService.getAccessibleFor(content.document.getElementById("div"))
+        .uniqueID;
+    });
+
+    is(
+      accUniqueID,
+      div.uniqueID,
+      "Both proxy and the accessible return correct unique ID."
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_caching_value.js b/accessible/tests/browser/e10s/browser_caching_value.js
new file mode 100644
index 0000000000..c727fc5252
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_caching_value.js
@@ -0,0 +1,195 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/value.js */
+loadScripts({ name: "value.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Test data has the format of:
+ * {
+ *   desc      {String}            description for better logging
+ *   id        {String}            given accessible DOMNode ID
+ *   expected  {String}            expected value for a given accessible
+ *   action    {?AsyncFunction}    an optional action that awaits a value change
+ *   attrs     {?Array}            an optional list of attributes to update
+ *   waitFor   {?Number}           an optional value change event to wait for
+ * }
+ */
+const valueTests = [
+  {
+    desc: "Initially value is set to 1st element of select",
+    id: "select",
+    expected: "1st",
+  },
+  {
+    desc: "Value should update to 3rd when 3 is pressed",
+    id: "select",
+    async action(browser) {
+      await invokeFocus(browser, "select");
+      await invokeContentTask(browser, [], () => {
+        const { ContentTaskUtils } = ChromeUtils.import(
+          "resource://testing-common/ContentTaskUtils.jsm"
+        );
+        const EventUtils = ContentTaskUtils.getEventUtils(content);
+        EventUtils.synthesizeKey("3", {}, content);
+      });
+    },
+    waitFor: EVENT_TEXT_VALUE_CHANGE,
+    expected: "3rd",
+  },
+  {
+    desc: "Initially value is set to @aria-valuenow for slider",
+    id: "slider",
+    expected: ["5", 5, 0, 7, 0],
+  },
+  {
+    desc: "Value should change when @aria-valuenow is updated",
+    id: "slider",
+    attrs: [
+      {
+        attr: "aria-valuenow",
+        value: "6",
+      },
+    ],
+    waitFor: EVENT_VALUE_CHANGE,
+    expected: ["6", 6, 0, 7, 0],
+  },
+  {
+    desc: "Value should change when @aria-valuetext is set",
+    id: "slider",
+    attrs: [
+      {
+        attr: "aria-valuetext",
+        value: "plain",
+      },
+    ],
+    waitFor: EVENT_TEXT_VALUE_CHANGE,
+    expected: ["plain", 6, 0, 7, 0],
+  },
+  {
+    desc: "Value should change when @aria-valuetext is updated",
+    id: "slider",
+    attrs: [
+      {
+        attr: "aria-valuetext",
+        value: "hey!",
+      },
+    ],
+    waitFor: EVENT_TEXT_VALUE_CHANGE,
+    expected: ["hey!", 6, 0, 7, 0],
+  },
+  {
+    desc:
+      "Value should change to @aria-valuetext when @aria-valuenow is removed",
+    id: "slider",
+    attrs: [
+      {
+        attr: "aria-valuenow",
+      },
+    ],
+    expected: ["hey!", 3.5, 0, 7, 0],
+  },
+  {
+    desc: "Initially value is not set for combobox",
+    id: "combobox",
+    expected: "",
+  },
+  {
+    desc: "Value should change when @value attribute is updated",
+    id: "combobox",
+    attrs: [
+      {
+        attr: "value",
+        value: "hello",
+      },
+    ],
+    waitFor: EVENT_TEXT_VALUE_CHANGE,
+    expected: "hello",
+  },
+  {
+    desc: "Initially value corresponds to @value attribute for progress",
+    id: "progress",
+    expected: "22%",
+  },
+  {
+    desc: "Value should change when @value attribute is updated",
+    id: "progress",
+    attrs: [
+      {
+        attr: "value",
+        value: "50",
+      },
+    ],
+    waitFor: EVENT_VALUE_CHANGE,
+    expected: "50%",
+  },
+  {
+    desc: "Initially value corresponds to @value attribute for range",
+    id: "range",
+    expected: "6",
+  },
+  {
+    desc: "Value should change when slider is moved",
+    id: "range",
+    async action(browser) {
+      await invokeFocus(browser, "range");
+      await invokeContentTask(browser, [], () => {
+        const { ContentTaskUtils } = ChromeUtils.import(
+          "resource://testing-common/ContentTaskUtils.jsm"
+        );
+        const EventUtils = ContentTaskUtils.getEventUtils(content);
+        EventUtils.synthesizeKey("VK_LEFT", {}, content);
+      });
+    },
+    waitFor: EVENT_VALUE_CHANGE,
+    expected: "5",
+  },
+];
+
+/**
+ * Test caching of accessible object values
+ */
+addAccessibleTask(
+  `
+  <div id="slider" role="slider" aria-valuenow="5"
+       aria-valuemin="0" aria-valuemax="7">slider</div>
+  <select id="select">
+    <option>1st</option>
+    <option>2nd</option>
+    <option>3rd</option>
+  </select>
+  <input id="combobox" role="combobox" aria-autocomplete="inline">
+  <progress id="progress" value="22" max="100"></progress>
+  <input type="range" id="range" min="0" max="10" value="6">`,
+  async function(browser, accDoc) {
+    for (let { desc, id, action, attrs, expected, waitFor } of valueTests) {
+      info(desc);
+      let acc = findAccessibleChildByID(accDoc, id);
+      let onUpdate;
+
+      if (waitFor) {
+        onUpdate = waitForEvent(waitFor, id);
+      }
+
+      if (action) {
+        await action(browser);
+      } else if (attrs) {
+        for (let { attr, value } of attrs) {
+          await invokeSetAttribute(browser, id, attr, value);
+        }
+      }
+
+      await onUpdate;
+      if (Array.isArray(expected)) {
+        acc.QueryInterface(nsIAccessibleValue);
+        testValue(acc, ...expected);
+      } else {
+        is(acc.value, expected, `Correct value for ${prettyName(acc)}`);
+      }
+    }
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_announcement.js b/accessible/tests/browser/e10s/browser_events_announcement.js
new file mode 100644
index 0000000000..2de6d4b005
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_announcement.js
@@ -0,0 +1,30 @@
+/* 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";
+
+addAccessibleTask(
+  `<p id="p">abc</p>`,
+  async function(browser, accDoc) {
+    let acc = findAccessibleChildByID(accDoc, "p");
+    let onAnnounce = waitForEvent(EVENT_ANNOUNCEMENT, acc);
+    acc.announce("please", nsIAccessibleAnnouncementEvent.POLITE);
+    let evt = await onAnnounce;
+    evt.QueryInterface(nsIAccessibleAnnouncementEvent);
+    is(evt.announcement, "please", "announcement matches.");
+    is(evt.priority, nsIAccessibleAnnouncementEvent.POLITE, "priority matches");
+
+    onAnnounce = waitForEvent(EVENT_ANNOUNCEMENT, acc);
+    acc.announce("do it", nsIAccessibleAnnouncementEvent.ASSERTIVE);
+    evt = await onAnnounce;
+    evt.QueryInterface(nsIAccessibleAnnouncementEvent);
+    is(evt.announcement, "do it", "announcement matches.");
+    is(
+      evt.priority,
+      nsIAccessibleAnnouncementEvent.ASSERTIVE,
+      "priority matches"
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_caretmove.js b/accessible/tests/browser/e10s/browser_events_caretmove.js
new file mode 100644
index 0000000000..a39d16e710
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_caretmove.js
@@ -0,0 +1,22 @@
+/* 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";
+
+/**
+ * Test caret move event and its interface:
+ *   - caretOffset
+ */
+addAccessibleTask(
+  '<input id="textbox" value="hello"/>',
+  async function(browser) {
+    let onCaretMoved = waitForEvent(EVENT_TEXT_CARET_MOVED, "textbox");
+    await invokeFocus(browser, "textbox");
+    let event = await onCaretMoved;
+
+    let caretMovedEvent = event.QueryInterface(nsIAccessibleCaretMoveEvent);
+    is(caretMovedEvent.caretOffset, 5, "Correct caret offset.");
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_hide.js b/accessible/tests/browser/e10s/browser_events_hide.js
new file mode 100644
index 0000000000..d46921d051
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_hide.js
@@ -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/. */
+
+"use strict";
+
+/**
+ * Test hide event and its interface:
+ *   - targetParent
+ *   - targetNextSibling
+ *   - targetPrevSibling
+ */
+addAccessibleTask(
+  `
+  <div id="parent">
+    <div id="previous"></div>
+    <div id="to-hide"></div>
+    <div id="next"></div>
+  </div>`,
+  async function(browser, accDoc) {
+    let acc = findAccessibleChildByID(accDoc, "to-hide");
+    let onHide = waitForEvent(EVENT_HIDE, acc);
+    await invokeSetStyle(browser, "to-hide", "visibility", "hidden");
+    let event = await onHide;
+    let hideEvent = event.QueryInterface(Ci.nsIAccessibleHideEvent);
+
+    is(
+      getAccessibleDOMNodeID(hideEvent.targetParent),
+      "parent",
+      "Correct target parent."
+    );
+    is(
+      getAccessibleDOMNodeID(hideEvent.targetNextSibling),
+      "next",
+      "Correct target next sibling."
+    );
+    is(
+      getAccessibleDOMNodeID(hideEvent.targetPrevSibling),
+      "previous",
+      "Correct target previous sibling."
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_show.js b/accessible/tests/browser/e10s/browser_events_show.js
new file mode 100644
index 0000000000..d464d8fb9d
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_show.js
@@ -0,0 +1,22 @@
+/* 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";
+
+/**
+ * Test show event
+ */
+addAccessibleTask(
+  '<div id="div" style="visibility: hidden;"></div>',
+  async function(browser) {
+    let onShow = waitForEvent(EVENT_SHOW, "div");
+    await invokeSetStyle(browser, "div", "visibility", "visible");
+    let showEvent = await onShow;
+    ok(
+      showEvent.accessibleDocument instanceof nsIAccessibleDocument,
+      "Accessible document not present."
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_statechange.js b/accessible/tests/browser/e10s/browser_events_statechange.js
new file mode 100644
index 0000000000..a027a974e4
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_statechange.js
@@ -0,0 +1,71 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+function checkStateChangeEvent(event, state, isExtraState, isEnabled) {
+  let scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+  is(scEvent.state, state, "Correct state of the statechange event.");
+  is(
+    scEvent.isExtraState,
+    isExtraState,
+    "Correct extra state bit of the statechange event."
+  );
+  is(scEvent.isEnabled, isEnabled, "Correct state of statechange event state");
+}
+
+// Insert mock source into the iframe to be able to verify the right document
+// body id.
+let iframeSrc = `data:text/html,
+  <html>
+    <head>
+      <meta charset='utf-8'/>
+      <title>Inner Iframe</title>
+    </head>
+    <body id='iframe'></body>
+  </html>`;
+
+/**
+ * Test state change event and its interface:
+ *   - state
+ *   - isExtraState
+ *   - isEnabled
+ */
+addAccessibleTask(
+  `
+  <iframe id="iframe" src="${iframeSrc}"></iframe>
+  <input id="checkbox" type="checkbox" />`,
+  async function(browser) {
+    // Test state change
+    let onStateChange = waitForEvent(EVENT_STATE_CHANGE, "checkbox");
+    // Set checked for a checkbox.
+    await invokeContentTask(browser, [], () => {
+      content.document.getElementById("checkbox").checked = true;
+    });
+    let event = await onStateChange;
+
+    checkStateChangeEvent(event, STATE_CHECKED, false, true);
+    testStates(event.accessible, STATE_CHECKED, 0);
+
+    // Test extra state
+    onStateChange = waitForEvent(EVENT_STATE_CHANGE, "iframe");
+    // Set design mode on.
+    await invokeContentTask(browser, [], () => {
+      content.document.getElementById("iframe").contentDocument.designMode =
+        "on";
+    });
+    event = await onStateChange;
+
+    checkStateChangeEvent(event, EXT_STATE_EDITABLE, true, true);
+    testStates(event.accessible, 0, EXT_STATE_EDITABLE);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_textchange.js b/accessible/tests/browser/e10s/browser_events_textchange.js
new file mode 100644
index 0000000000..1e822dc65a
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_textchange.js
@@ -0,0 +1,114 @@
+/* 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";
+
+function checkTextChangeEvent(
+  event,
+  id,
+  text,
+  start,
+  end,
+  isInserted,
+  isFromUserInput
+) {
+  let tcEvent = event.QueryInterface(nsIAccessibleTextChangeEvent);
+  is(tcEvent.start, start, `Correct start offset for ${prettyName(id)}`);
+  is(tcEvent.length, end - start, `Correct length for ${prettyName(id)}`);
+  is(
+    tcEvent.isInserted,
+    isInserted,
+    `Correct isInserted flag for ${prettyName(id)}`
+  );
+  is(tcEvent.modifiedText, text, `Correct text for ${prettyName(id)}`);
+  is(
+    tcEvent.isFromUserInput,
+    isFromUserInput,
+    `Correct value of isFromUserInput for ${prettyName(id)}`
+  );
+  ok(
+    tcEvent.accessibleDocument instanceof nsIAccessibleDocument,
+    "Accessible document not present."
+  );
+}
+
+async function changeText(browser, id, value, events) {
+  let onEvents = waitForOrderedEvents(
+    events.map(({ isInserted }) => {
+      let eventType = isInserted ? EVENT_TEXT_INSERTED : EVENT_TEXT_REMOVED;
+      return [eventType, id];
+    })
+  );
+  // Change text in the subtree.
+  await invokeContentTask(browser, [id, value], (contentId, contentValue) => {
+    content.document.getElementById(
+      contentId
+    ).firstChild.textContent = contentValue;
+  });
+  let resolvedEvents = await onEvents;
+
+  events.forEach(({ isInserted, str, offset }, idx) =>
+    checkTextChangeEvent(
+      resolvedEvents[idx],
+      id,
+      str,
+      offset,
+      offset + str.length,
+      isInserted,
+      false
+    )
+  );
+}
+
+async function removeTextFromInput(browser, id, value, start, end) {
+  let onTextRemoved = waitForEvent(EVENT_TEXT_REMOVED, id);
+  // Select text and delete it.
+  await invokeContentTask(
+    browser,
+    [id, start, end],
+    (contentId, contentStart, contentEnd) => {
+      let el = content.document.getElementById(contentId);
+      el.focus();
+      el.setSelectionRange(contentStart, contentEnd);
+    }
+  );
+  await invokeContentTask(browser, [], () => {
+    const { ContentTaskUtils } = ChromeUtils.import(
+      "resource://testing-common/ContentTaskUtils.jsm"
+    );
+    const EventUtils = ContentTaskUtils.getEventUtils(content);
+    EventUtils.sendChar("VK_DELETE", content);
+  });
+
+  let event = await onTextRemoved;
+  checkTextChangeEvent(event, id, value, start, end, false, true);
+}
+
+/**
+ * Test text change event and its interface:
+ *   - start
+ *   - length
+ *   - isInserted
+ *   - modifiedText
+ *   - isFromUserInput
+ */
+addAccessibleTask(
+  `
+  <p id="p">abc</p>
+  <input id="input" value="input" />`,
+  async function(browser) {
+    let events = [
+      { isInserted: false, str: "abc", offset: 0 },
+      { isInserted: true, str: "def", offset: 0 },
+    ];
+    await changeText(browser, "p", "def", events);
+
+    events = [{ isInserted: true, str: "DEF", offset: 2 }];
+    await changeText(browser, "p", "deDEFf", events);
+
+    // Test isFromUserInput property.
+    await removeTextFromInput(browser, "input", "n", 1, 2);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_events_vcchange.js b/accessible/tests/browser/e10s/browser_events_vcchange.js
new file mode 100644
index 0000000000..bf649fe045
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_vcchange.js
@@ -0,0 +1,87 @@
+/* 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";
+
+addAccessibleTask(
+  `
+  <p id="p1">abc</p>
+  <input id="input1" value="input" />`,
+  async function(browser) {
+    let onVCChanged = waitForEvent(
+      EVENT_VIRTUALCURSOR_CHANGED,
+      matchContentDoc
+    );
+    await invokeContentTask(browser, [], () => {
+      const { CommonUtils } = ChromeUtils.import(
+        "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+      );
+      let vc = CommonUtils.getAccessible(
+        content.document,
+        Ci.nsIAccessibleDocument
+      ).virtualCursor;
+      vc.position = CommonUtils.getAccessible(
+        "p1",
+        null,
+        null,
+        null,
+        content.document
+      );
+    });
+    let vccEvent = (await onVCChanged).QueryInterface(
+      nsIAccessibleVirtualCursorChangeEvent
+    );
+    is(vccEvent.newAccessible.id, "p1", "New position is correct");
+    is(vccEvent.newStartOffset, -1, "New start offset is correct");
+    is(vccEvent.newEndOffset, -1, "New end offset is correct");
+    ok(!vccEvent.isFromUserInput, "not user initiated");
+
+    onVCChanged = waitForEvent(EVENT_VIRTUALCURSOR_CHANGED, matchContentDoc);
+    await invokeContentTask(browser, [], () => {
+      const { CommonUtils } = ChromeUtils.import(
+        "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+      );
+      let vc = CommonUtils.getAccessible(
+        content.document,
+        Ci.nsIAccessibleDocument
+      ).virtualCursor;
+      vc.moveNextByText(Ci.nsIAccessiblePivot.CHAR_BOUNDARY);
+    });
+    vccEvent = (await onVCChanged).QueryInterface(
+      nsIAccessibleVirtualCursorChangeEvent
+    );
+    is(vccEvent.newAccessible.id, vccEvent.oldAccessible.id, "Same position");
+    is(vccEvent.newStartOffset, 0, "New start offset is correct");
+    is(vccEvent.newEndOffset, 1, "New end offset is correct");
+    ok(vccEvent.isFromUserInput, "user initiated");
+
+    onVCChanged = waitForEvent(EVENT_VIRTUALCURSOR_CHANGED, matchContentDoc);
+    await invokeContentTask(browser, [], () => {
+      const { CommonUtils } = ChromeUtils.import(
+        "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+      );
+      let vc = CommonUtils.getAccessible(
+        content.document,
+        Ci.nsIAccessibleDocument
+      ).virtualCursor;
+      vc.position = CommonUtils.getAccessible(
+        "input1",
+        null,
+        null,
+        null,
+        content.document
+      );
+    });
+    vccEvent = (await onVCChanged).QueryInterface(
+      nsIAccessibleVirtualCursorChangeEvent
+    );
+    isnot(vccEvent.oldAccessible, vccEvent.newAccessible, "positions differ");
+    is(vccEvent.oldAccessible.id, "p1", "Old position is correct");
+    is(vccEvent.newAccessible.id, "input1", "New position is correct");
+    is(vccEvent.newStartOffset, -1, "New start offset is correct");
+    is(vccEvent.newEndOffset, -1, "New end offset is correct");
+    ok(!vccEvent.isFromUserInput, "not user initiated");
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_text_paragraph_boundary.js b/accessible/tests/browser/e10s/browser_text_paragraph_boundary.js
new file mode 100644
index 0000000000..04e64520e8
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_text_paragraph_boundary.js
@@ -0,0 +1,22 @@
+/* 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";
+
+// Test that we don't crash the parent process when querying the paragraph
+// boundary on an Accessible which has remote ProxyAccessible descendants.
+addAccessibleTask(
+  `test`,
+  async function testParagraphBoundaryWithRemoteDescendants(browser, accDoc) {
+    const root = getRootAccessible(document).QueryInterface(
+      Ci.nsIAccessibleText
+    );
+    let start = {};
+    let end = {};
+    // The offsets will change as the Firefox UI changes. We don't really care
+    // what they are, just that we don't crash.
+    root.getTextAtOffset(0, nsIAccessibleText.BOUNDARY_PARAGRAPH, start, end);
+    ok(true, "Getting paragraph boundary succeeded");
+  }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_ariadialog.js b/accessible/tests/browser/e10s/browser_treeupdate_ariadialog.js
new file mode 100644
index 0000000000..8b4a575d75
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_ariadialog.js
@@ -0,0 +1,45 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// Test ARIA Dialog
+addAccessibleTask(
+  "e10s/doc_treeupdate_ariadialog.html",
+  async function(browser, accDoc) {
+    testAccessibleTree(accDoc, {
+      role: ROLE_DOCUMENT,
+      children: [],
+    });
+
+    // Make dialog visible and update its inner content.
+    let onShow = waitForEvent(EVENT_SHOW, "dialog");
+    await invokeContentTask(browser, [], () => {
+      content.document.getElementById("dialog").style.display = "block";
+    });
+    await onShow;
+
+    testAccessibleTree(accDoc, {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_DIALOG,
+          children: [
+            {
+              role: ROLE_PUSHBUTTON,
+              children: [{ role: ROLE_TEXT_LEAF }],
+            },
+            {
+              role: ROLE_ENTRY,
+            },
+          ],
+        },
+      ],
+    });
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_ariaowns.js b/accessible/tests/browser/e10s/browser_treeupdate_ariaowns.js
new file mode 100644
index 0000000000..dfd6401c48
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_ariaowns.js
@@ -0,0 +1,294 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function testContainer1(browser, accDoc) {
+  const id = "t1_container";
+  const docID = getAccessibleDOMNodeID(accDoc);
+  const acc = findAccessibleChildByID(accDoc, id);
+
+  /* ================= Initial tree test ==================================== */
+  // children are swapped by ARIA owns
+  let tree = {
+    SECTION: [{ CHECKBUTTON: [{ SECTION: [] }] }, { PUSHBUTTON: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Change ARIA owns ====================================== */
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetAttribute(browser, id, "aria-owns", "t1_button t1_subdiv");
+  await onReorder;
+
+  // children are swapped again, button and subdiv are appended to
+  // the children.
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // checkbox, native order
+      { PUSHBUTTON: [] }, // button, rearranged by ARIA own
+      { SECTION: [] }, // subdiv from the subtree, ARIA owned
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Remove ARIA owns ====================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetAttribute(browser, id, "aria-owns");
+  await onReorder;
+
+  // children follow the DOM order
+  tree = {
+    SECTION: [{ PUSHBUTTON: [] }, { CHECKBUTTON: [{ SECTION: [] }] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Set ARIA owns ========================================= */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetAttribute(browser, id, "aria-owns", "t1_button t1_subdiv");
+  await onReorder;
+
+  // children are swapped again, button and subdiv are appended to
+  // the children.
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // checkbox
+      { PUSHBUTTON: [] }, // button, rearranged by ARIA own
+      { SECTION: [] }, // subdiv from the subtree, ARIA owned
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Add ID to ARIA owns =================================== */
+  onReorder = waitForEvent(EVENT_REORDER, docID);
+  await invokeSetAttribute(
+    browser,
+    id,
+    "aria-owns",
+    "t1_button t1_subdiv t1_group"
+  );
+  await onReorder;
+
+  // children are swapped again, button and subdiv are appended to
+  // the children.
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // t1_checkbox
+      { PUSHBUTTON: [] }, // button, t1_button
+      { SECTION: [] }, // subdiv from the subtree, t1_subdiv
+      { GROUPING: [] }, // group from outside, t1_group
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Append element ======================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [id], contentId => {
+    let div = content.document.createElement("div");
+    div.setAttribute("id", "t1_child3");
+    div.setAttribute("role", "radio");
+    content.document.getElementById(contentId).appendChild(div);
+  });
+  await onReorder;
+
+  // children are invalidated, they includes aria-owns swapped kids and
+  // newly inserted child.
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // existing explicit, t1_checkbox
+      { RADIOBUTTON: [] }, // new explicit, t1_child3
+      { PUSHBUTTON: [] }, // ARIA owned, t1_button
+      { SECTION: [] }, // ARIA owned, t1_subdiv
+      { GROUPING: [] }, // ARIA owned, t1_group
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Remove element ======================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    content.document.getElementById("t1_span").remove();
+  });
+  await onReorder;
+
+  // subdiv should go away
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // explicit, t1_checkbox
+      { RADIOBUTTON: [] }, // explicit, t1_child3
+      { PUSHBUTTON: [] }, // ARIA owned, t1_button
+      { GROUPING: [] }, // ARIA owned, t1_group
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Remove ID ============================================= */
+  onReorder = waitForEvent(EVENT_REORDER, docID);
+  await invokeSetAttribute(browser, "t1_group", "id");
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] },
+      { RADIOBUTTON: [] },
+      { PUSHBUTTON: [] }, // ARIA owned, t1_button
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================ Set ID ================================================ */
+  onReorder = waitForEvent(EVENT_REORDER, docID);
+  await invokeSetAttribute(browser, "t1_grouptmp", "id", "t1_group");
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      { CHECKBUTTON: [] },
+      { RADIOBUTTON: [] },
+      { PUSHBUTTON: [] }, // ARIA owned, t1_button
+      { GROUPING: [] }, // ARIA owned, t1_group, previously t1_grouptmp
+    ],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+async function removeContainer(browser, accDoc) {
+  const id = "t2_container1";
+  const acc = findAccessibleChildByID(accDoc, id);
+
+  let tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // ARIA owned, 't2_owned'
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    content.document
+      .getElementById("t2_container2")
+      .removeChild(content.document.getElementById("t2_container3"));
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+async function stealAndRecacheChildren(browser, accDoc) {
+  const id1 = "t3_container1";
+  const id2 = "t3_container2";
+  const acc1 = findAccessibleChildByID(accDoc, id1);
+  const acc2 = findAccessibleChildByID(accDoc, id2);
+
+  /* ================ Attempt to steal from other ARIA owns ================= */
+  let onReorder = waitForEvent(EVENT_REORDER, id2);
+  await invokeSetAttribute(browser, id2, "aria-owns", "t3_child");
+  await invokeContentTask(browser, [id2], id => {
+    let div = content.document.createElement("div");
+    div.setAttribute("role", "radio");
+    content.document.getElementById(id).appendChild(div);
+  });
+  await onReorder;
+
+  let tree = {
+    SECTION: [
+      { CHECKBUTTON: [] }, // ARIA owned
+    ],
+  };
+  testAccessibleTree(acc1, tree);
+
+  tree = {
+    SECTION: [{ RADIOBUTTON: [] }],
+  };
+  testAccessibleTree(acc2, tree);
+}
+
+async function showHiddenElement(browser, accDoc) {
+  const id = "t4_container1";
+  const acc = findAccessibleChildByID(accDoc, id);
+
+  let tree = {
+    SECTION: [{ RADIOBUTTON: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetStyle(browser, "t4_child1", "display", "block");
+  await onReorder;
+
+  tree = {
+    SECTION: [{ CHECKBUTTON: [] }, { RADIOBUTTON: [] }],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+async function rearrangeARIAOwns(browser, accDoc) {
+  const id = "t5_container";
+  const acc = findAccessibleChildByID(accDoc, id);
+  const tests = [
+    {
+      val: "t5_checkbox t5_radio t5_button",
+      roleList: ["CHECKBUTTON", "RADIOBUTTON", "PUSHBUTTON"],
+    },
+    {
+      val: "t5_radio t5_button t5_checkbox",
+      roleList: ["RADIOBUTTON", "PUSHBUTTON", "CHECKBUTTON"],
+    },
+  ];
+
+  for (let { val, roleList } of tests) {
+    let onReorder = waitForEvent(EVENT_REORDER, id);
+    await invokeSetAttribute(browser, id, "aria-owns", val);
+    await onReorder;
+
+    let tree = { SECTION: [] };
+    for (let role of roleList) {
+      let ch = {};
+      ch[role] = [];
+      tree.SECTION.push(ch);
+    }
+    testAccessibleTree(acc, tree);
+  }
+}
+
+async function removeNotARIAOwnedEl(browser, accDoc) {
+  const id = "t6_container";
+  const acc = findAccessibleChildByID(accDoc, id);
+
+  let tree = {
+    SECTION: [{ TEXT_LEAF: [] }, { GROUPING: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [id], contentId => {
+    content.document
+      .getElementById(contentId)
+      .removeChild(content.document.getElementById("t6_span"));
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [{ GROUPING: [] }],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+addAccessibleTask(
+  "e10s/doc_treeupdate_ariaowns.html",
+  async function(browser, accDoc) {
+    await testContainer1(browser, accDoc);
+    await removeContainer(browser, accDoc);
+    await stealAndRecacheChildren(browser, accDoc);
+    await showHiddenElement(browser, accDoc);
+    await rearrangeARIAOwns(browser, accDoc);
+    await removeNotARIAOwnedEl(browser, accDoc);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_canvas.js b/accessible/tests/browser/e10s/browser_treeupdate_canvas.js
new file mode 100644
index 0000000000..5fcd1eb773
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_canvas.js
@@ -0,0 +1,28 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `
+  <canvas id="canvas">
+    <div id="dialog" role="dialog" style="display: none;"></div>
+  </canvas>`,
+  async function(browser, accDoc) {
+    let canvas = findAccessibleChildByID(accDoc, "canvas");
+    let dialog = findAccessibleChildByID(accDoc, "dialog");
+
+    testAccessibleTree(canvas, { CANVAS: [] });
+
+    let onShow = waitForEvent(EVENT_SHOW, "dialog");
+    await invokeSetStyle(browser, "dialog", "display", "block");
+    await onShow;
+
+    testAccessibleTree(dialog, { DIALOG: [] });
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_cssoverflow.js b/accessible/tests/browser/e10s/browser_treeupdate_cssoverflow.js
new file mode 100644
index 0000000000..629f9fb89f
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_cssoverflow.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `
+  <div id="container"><div id="scrollarea" style="overflow:auto;"><input>`,
+  async function(browser, accDoc) {
+    const id1 = "container";
+    const container = findAccessibleChildByID(accDoc, id1);
+
+    /* ================= Change scroll range ================================== */
+    let tree = {
+      SECTION: [
+        {
+          // container
+          SECTION: [
+            {
+              // scroll area
+              ENTRY: [], // child content
+            },
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(container, tree);
+
+    let onReorder = waitForEvent(EVENT_REORDER, id1);
+    await invokeContentTask(browser, [id1], id => {
+      let doc = content.document;
+      doc.getElementById("scrollarea").style.width = "20px";
+      doc.getElementById(id).appendChild(doc.createElement("input"));
+    });
+    await onReorder;
+
+    tree = {
+      SECTION: [
+        {
+          // container
+          SECTION: [
+            {
+              // scroll area
+              ENTRY: [], // child content
+            },
+          ],
+        },
+        {
+          ENTRY: [], // inserted input
+        },
+      ],
+    };
+    testAccessibleTree(container, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_doc.js b/accessible/tests/browser/e10s/browser_treeupdate_doc.js
new file mode 100644
index 0000000000..98f399695c
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_doc.js
@@ -0,0 +1,320 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+const iframeSrc = `data:text/html,
+  <html>
+    <head>
+      <meta charset='utf-8'/>
+      <title>Inner Iframe</title>
+    </head>
+    <body id='inner-iframe'></body>
+  </html>`;
+
+addAccessibleTask(
+  `
+  <iframe id="iframe" src="${iframeSrc}"></iframe>`,
+  async function(browser, accDoc) {
+    // ID of the iframe that is being tested
+    const id = "inner-iframe";
+
+    let iframe = findAccessibleChildByID(accDoc, id);
+
+    /* ================= Initial tree check =================================== */
+    let tree = {
+      role: ROLE_DOCUMENT,
+      children: [],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Write iframe document ================================ */
+    let reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let newHTMLNode = docNode.createElement("html");
+      let newBodyNode = docNode.createElement("body");
+      let newTextNode = docNode.createTextNode("New Wave");
+      newBodyNode.id = contentId;
+      newBodyNode.appendChild(newTextNode);
+      newHTMLNode.appendChild(newBodyNode);
+      docNode.replaceChild(newHTMLNode, docNode.documentElement);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "New Wave",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Replace iframe HTML element ========================== */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      // We can't use open/write/close outside of iframe document because of
+      // security error.
+      let script = docNode.createElement("script");
+      script.textContent = `
+      document.open();
+      document.write('<body id="${contentId}">hello</body>');
+      document.close();`;
+      docNode.body.appendChild(script);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "hello",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Replace iframe body ================================== */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let newBodyNode = docNode.createElement("body");
+      let newTextNode = docNode.createTextNode("New Hello");
+      newBodyNode.id = contentId;
+      newBodyNode.appendChild(newTextNode);
+      newBodyNode.setAttribute("role", "application");
+      docNode.documentElement.replaceChild(newBodyNode, docNode.body);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_APPLICATION,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "New Hello",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Open iframe document ================================= */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      // Open document.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let script = docNode.createElement("script");
+      script.textContent = `
+      function closeMe() {
+        document.write('Works?');
+        document.close();
+      }
+      window.closeMe = closeMe;
+      document.open();
+      document.write('<body id="${contentId}"></body>');`;
+      docNode.body.appendChild(script);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Close iframe document ================================ */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [], () => {
+      // Write and close document.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      docNode.write("Works?");
+      docNode.close();
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "Works?",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Remove HTML from iframe document ===================== */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, iframe);
+    await invokeContentTask(browser, [], () => {
+      // Remove HTML element.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      docNode.firstChild.remove();
+    });
+    let event = await reorderEventPromise;
+
+    ok(
+      event.accessible instanceof nsIAccessibleDocument,
+      "Reorder should happen on the document"
+    );
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Insert HTML to iframe document ======================= */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      // Insert HTML element.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let html = docNode.createElement("html");
+      let body = docNode.createElement("body");
+      let text = docNode.createTextNode("Haha");
+      body.appendChild(text);
+      body.id = contentId;
+      html.appendChild(body);
+      docNode.appendChild(html);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "Haha",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Remove body from iframe document ===================== */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, iframe);
+    await invokeContentTask(browser, [], () => {
+      // Remove body element.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      docNode.documentElement.removeChild(docNode.body);
+    });
+    event = await reorderEventPromise;
+
+    ok(
+      event.accessible instanceof nsIAccessibleDocument,
+      "Reorder should happen on the document"
+    );
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================ Insert element under document element while body missed */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, iframe);
+    await invokeContentTask(browser, [], () => {
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let inputNode = (content.window.inputNode = docNode.createElement(
+        "input"
+      ));
+      docNode.documentElement.appendChild(inputNode);
+    });
+    event = await reorderEventPromise;
+
+    ok(
+      event.accessible instanceof nsIAccessibleDocument,
+      "Reorder should happen on the document"
+    );
+    tree = {
+      DOCUMENT: [{ ENTRY: [] }],
+    };
+    testAccessibleTree(iframe, tree);
+
+    reorderEventPromise = waitForEvent(EVENT_REORDER, iframe);
+    await invokeContentTask(browser, [], () => {
+      let docEl = content.document.getElementById("iframe").contentDocument
+        .documentElement;
+      // Remove aftermath of this test before next test starts.
+      docEl.firstChild.remove();
+    });
+    // Make sure reorder event was fired and that the input was removed.
+    await reorderEventPromise;
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Insert body to iframe document ======================= */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      // Write and close document.
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      // Insert body element.
+      let body = docNode.createElement("body");
+      let text = docNode.createTextNode("Yo ho ho i butylka roma!");
+      body.appendChild(text);
+      body.id = contentId;
+      docNode.documentElement.appendChild(body);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_DOCUMENT,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "Yo ho ho i butylka roma!",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+
+    /* ================= Change source ======================================== */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, "iframe");
+    await invokeSetAttribute(
+      browser,
+      "iframe",
+      "src",
+      `data:text/html,<html><body id="${id}"><input></body></html>`
+    );
+    event = await reorderEventPromise;
+
+    tree = {
+      INTERNAL_FRAME: [{ DOCUMENT: [{ ENTRY: [] }] }],
+    };
+    testAccessibleTree(event.accessible, tree);
+    iframe = findAccessibleChildByID(event.accessible, id);
+
+    /* ================= Replace iframe body on ARIA role body ================ */
+    reorderEventPromise = waitForEvent(EVENT_REORDER, id);
+    await invokeContentTask(browser, [id], contentId => {
+      let docNode = content.document.getElementById("iframe").contentDocument;
+      let newBodyNode = docNode.createElement("body");
+      let newTextNode = docNode.createTextNode("New Hello");
+      newBodyNode.appendChild(newTextNode);
+      newBodyNode.setAttribute("role", "application");
+      newBodyNode.id = contentId;
+      docNode.documentElement.replaceChild(newBodyNode, docNode.body);
+    });
+    await reorderEventPromise;
+
+    tree = {
+      role: ROLE_APPLICATION,
+      children: [
+        {
+          role: ROLE_TEXT_LEAF,
+          name: "New Hello",
+        },
+      ],
+    };
+    testAccessibleTree(iframe, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_gencontent.js b/accessible/tests/browser/e10s/browser_treeupdate_gencontent.js
new file mode 100644
index 0000000000..ca1150f9dd
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_gencontent.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `
+  <style>
+    .gentext:before {
+      content: "START"
+    }
+    .gentext:after {
+      content: "END"
+    }
+  </style>
+  <div id="container1"></div>
+  <div id="container2"><div id="container2_child">text</div></div>`,
+  async function(browser, accDoc) {
+    const id1 = "container1";
+    const id2 = "container2";
+    let container1 = findAccessibleChildByID(accDoc, id1);
+    let container2 = findAccessibleChildByID(accDoc, id2);
+
+    let tree = {
+      SECTION: [], // container
+    };
+    testAccessibleTree(container1, tree);
+
+    tree = {
+      SECTION: [
+        {
+          // container2
+          SECTION: [
+            {
+              // container2 child
+              TEXT_LEAF: [], // primary text
+            },
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(container2, tree);
+
+    let onReorder = waitForEvent(EVENT_REORDER, id1);
+    // Create and add an element with CSS generated content to container1
+    await invokeContentTask(browser, [id1], id => {
+      let node = content.document.createElement("div");
+      node.textContent = "text";
+      node.setAttribute("class", "gentext");
+      content.document.getElementById(id).appendChild(node);
+    });
+    await onReorder;
+
+    tree = {
+      SECTION: [
+        // container
+        {
+          SECTION: [
+            // inserted node
+            { STATICTEXT: [] }, // :before
+            { TEXT_LEAF: [] }, // primary text
+            { STATICTEXT: [] }, // :after
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(container1, tree);
+
+    onReorder = waitForEvent(EVENT_REORDER, "container2_child");
+    // Add CSS generated content to an element in container2's subtree
+    await invokeSetAttribute(browser, "container2_child", "class", "gentext");
+    await onReorder;
+
+    tree = {
+      SECTION: [
+        // container2
+        {
+          SECTION: [
+            // container2 child
+            { STATICTEXT: [] }, // :before
+            { TEXT_LEAF: [] }, // primary text
+            { STATICTEXT: [] }, // :after
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(container2, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_hidden.js b/accessible/tests/browser/e10s/browser_treeupdate_hidden.js
new file mode 100644
index 0000000000..725999db36
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_hidden.js
@@ -0,0 +1,32 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function setHidden(browser, value) {
+  let onReorder = waitForEvent(EVENT_REORDER, "container");
+  await invokeSetAttribute(browser, "child", "hidden", value);
+  await onReorder;
+}
+
+addAccessibleTask(
+  '<div id="container"><input id="child"></div>',
+  async function(browser, accDoc) {
+    let container = findAccessibleChildByID(accDoc, "container");
+
+    testAccessibleTree(container, { SECTION: [{ ENTRY: [] }] });
+
+    // Set @hidden attribute
+    await setHidden(browser, "true");
+    testAccessibleTree(container, { SECTION: [] });
+
+    // Remove @hidden attribute
+    await setHidden(browser);
+    testAccessibleTree(container, { SECTION: [{ ENTRY: [] }] });
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_imagemap.js b/accessible/tests/browser/e10s/browser_treeupdate_imagemap.js
new file mode 100644
index 0000000000..e206b83276
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_imagemap.js
@@ -0,0 +1,187 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function testImageMap(browser, accDoc) {
+  const id = "imgmap";
+  const acc = findAccessibleChildByID(accDoc, id);
+
+  /* ================= Initial tree test ==================================== */
+  let tree = {
+    IMAGE_MAP: [{ role: ROLE_LINK, name: "b", children: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Insert area ========================================== */
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    let areaElm = content.document.createElement("area");
+    let mapNode = content.document.getElementById("map");
+    areaElm.setAttribute(
+      "href",
+      "http://www.bbc.co.uk/radio4/atoz/index.shtml#a"
+    );
+    areaElm.setAttribute("coords", "0,0,13,14");
+    areaElm.setAttribute("alt", "a");
+    areaElm.setAttribute("shape", "rect");
+    mapNode.insertBefore(areaElm, mapNode.firstChild);
+  });
+  await onReorder;
+
+  tree = {
+    IMAGE_MAP: [
+      { role: ROLE_LINK, name: "a", children: [] },
+      { role: ROLE_LINK, name: "b", children: [] },
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Append area ========================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    let areaElm = content.document.createElement("area");
+    let mapNode = content.document.getElementById("map");
+    areaElm.setAttribute(
+      "href",
+      "http://www.bbc.co.uk/radio4/atoz/index.shtml#c"
+    );
+    areaElm.setAttribute("coords", "34,0,47,14");
+    areaElm.setAttribute("alt", "c");
+    areaElm.setAttribute("shape", "rect");
+    mapNode.appendChild(areaElm);
+  });
+  await onReorder;
+
+  tree = {
+    IMAGE_MAP: [
+      { role: ROLE_LINK, name: "a", children: [] },
+      { role: ROLE_LINK, name: "b", children: [] },
+      { role: ROLE_LINK, name: "c", children: [] },
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Remove area ========================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    let mapNode = content.document.getElementById("map");
+    mapNode.removeChild(mapNode.firstElementChild);
+  });
+  await onReorder;
+
+  tree = {
+    IMAGE_MAP: [
+      { role: ROLE_LINK, name: "b", children: [] },
+      { role: ROLE_LINK, name: "c", children: [] },
+    ],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+async function testContainer(browser) {
+  const id = "container";
+  /* ================= Remove name on map =================================== */
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetAttribute(browser, "map", "name");
+  let event = await onReorder;
+  const acc = event.accessible;
+
+  let tree = {
+    SECTION: [{ GRAPHIC: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Restore name on map ================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetAttribute(browser, "map", "name", "atoz_map");
+  // XXX: force repainting of the image (see bug 745788 for details).
+  await invokeContentTask(browser, [], () => {
+    const { ContentTaskUtils } = ChromeUtils.import(
+      "resource://testing-common/ContentTaskUtils.jsm"
+    );
+    const EventUtils = ContentTaskUtils.getEventUtils(content);
+    EventUtils.synthesizeMouse(
+      content.document.getElementById("imgmap"),
+      10,
+      10,
+      { type: "mousemove" },
+      content
+    );
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      {
+        IMAGE_MAP: [{ LINK: [] }, { LINK: [] }],
+      },
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Remove map =========================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [], () => {
+    let mapNode = content.document.getElementById("map");
+    mapNode.remove();
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [{ GRAPHIC: [] }],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Insert map =========================================== */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [id], contentId => {
+    let map = content.document.createElement("map");
+    let area = content.document.createElement("area");
+
+    map.setAttribute("name", "atoz_map");
+    map.setAttribute("id", "map");
+
+    area.setAttribute("href", "http://www.bbc.co.uk/radio4/atoz/index.shtml#b");
+    area.setAttribute("coords", "17,0,30,14");
+    area.setAttribute("alt", "b");
+    area.setAttribute("shape", "rect");
+
+    map.appendChild(area);
+    content.document.getElementById(contentId).appendChild(map);
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      {
+        IMAGE_MAP: [{ LINK: [] }],
+      },
+    ],
+  };
+  testAccessibleTree(acc, tree);
+
+  /* ================= Hide image map ======================================= */
+  onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeSetStyle(browser, "imgmap", "display", "none");
+  await onReorder;
+
+  tree = {
+    SECTION: [],
+  };
+  testAccessibleTree(acc, tree);
+}
+
+addAccessibleTask(
+  "e10s/doc_treeupdate_imagemap.html",
+  async function(browser, accDoc) {
+    await waitForImageMap(browser, accDoc);
+    await testImageMap(browser, accDoc);
+    await testContainer(browser);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_list.js b/accessible/tests/browser/e10s/browser_treeupdate_list.js
new file mode 100644
index 0000000000..d14b983c10
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_list.js
@@ -0,0 +1,52 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function setDisplayAndWaitForReorder(browser, value) {
+  let onReorder = waitForEvent(EVENT_REORDER, "ul");
+  await invokeSetStyle(browser, "li", "display", value);
+  return onReorder;
+}
+
+addAccessibleTask(
+  `
+  <ul id="ul">
+    <li id="li">item1</li>
+  </ul>`,
+  async function(browser, accDoc) {
+    let li = findAccessibleChildByID(accDoc, "li");
+    let bullet = li.firstChild;
+    let accTree = {
+      role: ROLE_LISTITEM,
+      children: [
+        {
+          role: ROLE_LISTITEM_MARKER,
+          children: [],
+        },
+        {
+          role: ROLE_TEXT_LEAF,
+          children: [],
+        },
+      ],
+    };
+    testAccessibleTree(li, accTree);
+
+    await setDisplayAndWaitForReorder(browser, "none");
+
+    ok(isDefunct(li), "Check that li is defunct.");
+    ok(isDefunct(bullet), "Check that bullet is defunct.");
+
+    let event = await setDisplayAndWaitForReorder(browser, "list-item");
+
+    testAccessibleTree(
+      findAccessibleChildByID(event.accessible, "li"),
+      accTree
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_list_editabledoc.js b/accessible/tests/browser/e10s/browser_treeupdate_list_editabledoc.js
new file mode 100644
index 0000000000..9c672f3c7c
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_list_editabledoc.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  '<ol id="list"></ol>',
+  async function(browser, accDoc) {
+    let list = findAccessibleChildByID(accDoc, "list");
+
+    testAccessibleTree(list, {
+      role: ROLE_LIST,
+      children: [],
+    });
+
+    await invokeSetAttribute(
+      browser,
+      currentContentDoc(),
+      "contentEditable",
+      "true"
+    );
+    let onReorder = waitForEvent(EVENT_REORDER, "list");
+    await invokeContentTask(browser, [], () => {
+      let li = content.document.createElement("li");
+      li.textContent = "item";
+      content.document.getElementById("list").appendChild(li);
+    });
+    await onReorder;
+
+    testAccessibleTree(list, {
+      role: ROLE_LIST,
+      children: [
+        {
+          role: ROLE_LISTITEM,
+          children: [
+            { role: ROLE_LISTITEM_MARKER, name: "1. ", children: [] },
+            { role: ROLE_TEXT_LEAF, children: [] },
+          ],
+        },
+      ],
+    });
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_listener.js b/accessible/tests/browser/e10s/browser_treeupdate_listener.js
new file mode 100644
index 0000000000..35baf28667
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_listener.js
@@ -0,0 +1,38 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  '<span id="parent"><span id="child"></span></span>',
+  async function(browser, accDoc) {
+    is(
+      findAccessibleChildByID(accDoc, "parent"),
+      null,
+      "Check that parent is not accessible."
+    );
+    is(
+      findAccessibleChildByID(accDoc, "child"),
+      null,
+      "Check that child is not accessible."
+    );
+
+    let onReorder = waitForEvent(EVENT_REORDER, matchContentDoc);
+    // Add an event listener to parent.
+    await invokeContentTask(browser, [], () => {
+      content.window.dummyListener = () => {};
+      content.document
+        .getElementById("parent")
+        .addEventListener("click", content.window.dummyListener);
+    });
+    await onReorder;
+
+    let tree = { TEXT: [] };
+    testAccessibleTree(findAccessibleChildByID(accDoc, "parent"), tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_optgroup.js b/accessible/tests/browser/e10s/browser_treeupdate_optgroup.js
new file mode 100644
index 0000000000..15fed8112d
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_optgroup.js
@@ -0,0 +1,103 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  '<select id="select"></select>',
+  async function(browser, accDoc) {
+    let select = findAccessibleChildByID(accDoc, "select");
+
+    let onEvent = waitForEvent(EVENT_REORDER, "select");
+    // Create a combobox with grouping and 2 standalone options
+    await invokeContentTask(browser, [], () => {
+      let doc = content.document;
+      let contentSelect = doc.getElementById("select");
+      let optGroup = doc.createElement("optgroup");
+
+      for (let i = 0; i < 2; i++) {
+        let opt = doc.createElement("option");
+        opt.value = i;
+        opt.text = "Option: Value " + i;
+        optGroup.appendChild(opt);
+      }
+      contentSelect.add(optGroup, null);
+
+      for (let i = 0; i < 2; i++) {
+        let opt = doc.createElement("option");
+        contentSelect.add(opt, null);
+      }
+      contentSelect.firstChild.firstChild.id = "option1Node";
+    });
+    let event = await onEvent;
+    let option1Node = findAccessibleChildByID(event.accessible, "option1Node");
+
+    let tree = {
+      COMBOBOX: [
+        {
+          COMBOBOX_LIST: [
+            {
+              GROUPING: [
+                { COMBOBOX_OPTION: [{ TEXT_LEAF: [] }] },
+                { COMBOBOX_OPTION: [{ TEXT_LEAF: [] }] },
+              ],
+            },
+            {
+              COMBOBOX_OPTION: [],
+            },
+            {
+              COMBOBOX_OPTION: [],
+            },
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(select, tree);
+    ok(!isDefunct(option1Node), "option shouldn't be defunct");
+
+    onEvent = waitForEvent(EVENT_REORDER, "select");
+    // Remove grouping from combobox
+    await invokeContentTask(browser, [], () => {
+      let contentSelect = content.document.getElementById("select");
+      contentSelect.firstChild.remove();
+    });
+    await onEvent;
+
+    tree = {
+      COMBOBOX: [
+        {
+          COMBOBOX_LIST: [{ COMBOBOX_OPTION: [] }, { COMBOBOX_OPTION: [] }],
+        },
+      ],
+    };
+    testAccessibleTree(select, tree);
+    ok(
+      isDefunct(option1Node),
+      "removed option shouldn't be accessible anymore!"
+    );
+
+    onEvent = waitForEvent(EVENT_REORDER, "select");
+    // Remove all options from combobox
+    await invokeContentTask(browser, [], () => {
+      let contentSelect = content.document.getElementById("select");
+      while (contentSelect.length) {
+        contentSelect.remove(0);
+      }
+    });
+    await onEvent;
+
+    tree = {
+      COMBOBOX: [
+        {
+          COMBOBOX_LIST: [],
+        },
+      ],
+    };
+    testAccessibleTree(select, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_removal.js b/accessible/tests/browser/e10s/browser_treeupdate_removal.js
new file mode 100644
index 0000000000..eb791525b3
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_removal.js
@@ -0,0 +1,58 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  "e10s/doc_treeupdate_removal.xhtml",
+  async function(browser, accDoc) {
+    ok(
+      isAccessible(findAccessibleChildByID(accDoc, "the_table")),
+      "table should be accessible"
+    );
+
+    // Move the_table element into hidden subtree.
+    let onReorder = waitForEvent(EVENT_REORDER, matchContentDoc);
+    await invokeContentTask(browser, [], () => {
+      content.document
+        .getElementById("the_displaynone")
+        .appendChild(content.document.getElementById("the_table"));
+    });
+    await onReorder;
+
+    ok(
+      !isAccessible(findAccessibleChildByID(accDoc, "the_table")),
+      "table in display none tree shouldn't be accessible"
+    );
+    ok(
+      !isAccessible(findAccessibleChildByID(accDoc, "the_row")),
+      "row shouldn't be accessible"
+    );
+
+    // Remove the_row element (since it did not have accessible, no event needed).
+    await invokeContentTask(browser, [], () => {
+      content.document.body.removeChild(
+        content.document.getElementById("the_row")
+      );
+    });
+
+    // make sure no accessibles have stuck around.
+    ok(
+      !isAccessible(findAccessibleChildByID(accDoc, "the_row")),
+      "row shouldn't be accessible"
+    );
+    ok(
+      !isAccessible(findAccessibleChildByID(accDoc, "the_table")),
+      "table shouldn't be accessible"
+    );
+    ok(
+      !isAccessible(findAccessibleChildByID(accDoc, "the_displayNone")),
+      "display none things shouldn't be accessible"
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_select_dropdown.js b/accessible/tests/browser/e10s/browser_treeupdate_select_dropdown.js
new file mode 100644
index 0000000000..add454ceac
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_select_dropdown.js
@@ -0,0 +1,77 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+const snippet = `
+<select id="select">
+  <option>o1</option>
+  <optgroup label="g1">
+    <option>g1o1</option>
+    <option>g1o2</option>
+  </optgroup>
+  <optgroup label="g2">
+    <option>g2o1</option>
+    <option>g2o2</option>
+  </optgroup>
+  <option>o2</option>
+</select>
+`;
+
+addAccessibleTask(
+  snippet,
+  async function(browser, accDoc) {
+    await invokeFocus(browser, "select");
+    // Expand the select. A dropdown item should get focus.
+    // Note that the dropdown is rendered in the parent process.
+    let focused = waitForEvent(
+      EVENT_FOCUS,
+      event => event.accessible.role == ROLE_COMBOBOX_OPTION,
+      "Dropdown item focused after select expanded"
+    );
+    await invokeContentTask(browser, [], () => {
+      const { ContentTaskUtils } = ChromeUtils.import(
+        "resource://testing-common/ContentTaskUtils.jsm"
+      );
+      const EventUtils = ContentTaskUtils.getEventUtils(content);
+      EventUtils.synthesizeKey("VK_DOWN", { altKey: true }, content);
+    });
+    let event = await focused;
+    let dropdown = event.accessible.parent;
+
+    let selectedOptionChildren = [];
+    if (MAC) {
+      // Checkmark is part of the Mac menu styling.
+      selectedOptionChildren = [{ STATICTEXT: [] }];
+    }
+    let tree = {
+      COMBOBOX_LIST: [
+        { COMBOBOX_OPTION: selectedOptionChildren },
+        { GROUPING: [{ COMBOBOX_OPTION: [] }, { COMBOBOX_OPTION: [] }] },
+        { GROUPING: [{ COMBOBOX_OPTION: [] }, { COMBOBOX_OPTION: [] }] },
+        { COMBOBOX_OPTION: [] },
+      ],
+    };
+    testAccessibleTree(dropdown, tree);
+
+    // Collapse the select. Focus should return to the select.
+    focused = waitForEvent(
+      EVENT_FOCUS,
+      "select",
+      "select focused after collapsed"
+    );
+    await invokeContentTask(browser, [], () => {
+      const { ContentTaskUtils } = ChromeUtils.import(
+        "resource://testing-common/ContentTaskUtils.jsm"
+      );
+      const EventUtils = ContentTaskUtils.getEventUtils(content);
+      EventUtils.synthesizeKey("VK_ESCAPE", {}, content);
+    });
+    await focused;
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_table.js b/accessible/tests/browser/e10s/browser_treeupdate_table.js
new file mode 100644
index 0000000000..5c2903225a
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_table.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `
+  <table id="table">
+    <tr>
+      <td>cell1</td>
+      <td>cell2</td>
+    </tr>
+  </table>`,
+  async function(browser, accDoc) {
+    let table = findAccessibleChildByID(accDoc, "table");
+
+    let tree = {
+      TABLE: [
+        { ROW: [{ CELL: [{ TEXT_LEAF: [] }] }, { CELL: [{ TEXT_LEAF: [] }] }] },
+      ],
+    };
+    testAccessibleTree(table, tree);
+
+    let onReorder = waitForEvent(EVENT_REORDER, "table");
+    await invokeContentTask(browser, [], () => {
+      // append a caption, it should appear as a first element in the
+      // accessible tree.
+      let doc = content.document;
+      let caption = doc.createElement("caption");
+      caption.textContent = "table caption";
+      doc.getElementById("table").appendChild(caption);
+    });
+    await onReorder;
+
+    tree = {
+      TABLE: [
+        { CAPTION: [{ TEXT_LEAF: [] }] },
+        { ROW: [{ CELL: [{ TEXT_LEAF: [] }] }, { CELL: [{ TEXT_LEAF: [] }] }] },
+      ],
+    };
+    testAccessibleTree(table, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_textleaf.js b/accessible/tests/browser/e10s/browser_treeupdate_textleaf.js
new file mode 100644
index 0000000000..6f89105b86
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_textleaf.js
@@ -0,0 +1,38 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function removeTextData(browser, accessible, id, role) {
+  let tree = {
+    role,
+    children: [{ role: ROLE_TEXT_LEAF, name: "text" }],
+  };
+  testAccessibleTree(accessible, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, id);
+  await invokeContentTask(browser, [id], contentId => {
+    content.document.getElementById(contentId).firstChild.textContent = "";
+  });
+  await onReorder;
+
+  tree = { role, children: [] };
+  testAccessibleTree(accessible, tree);
+}
+
+addAccessibleTask(
+  `
+  <p id="p">text</p>
+  <pre id="pre">text</pre>`,
+  async function(browser, accDoc) {
+    let p = findAccessibleChildByID(accDoc, "p");
+    let pre = findAccessibleChildByID(accDoc, "pre");
+    await removeTextData(browser, p, "p", ROLE_PARAGRAPH);
+    await removeTextData(browser, pre, "pre", ROLE_TEXT_CONTAINER);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_visibility.js b/accessible/tests/browser/e10s/browser_treeupdate_visibility.js
new file mode 100644
index 0000000000..4583056586
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_visibility.js
@@ -0,0 +1,342 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function testTreeOnHide(browser, accDoc, containerID, id, before, after) {
+  let acc = findAccessibleChildByID(accDoc, containerID);
+  testAccessibleTree(acc, before);
+
+  let onReorder = waitForEvent(EVENT_REORDER, containerID);
+  await invokeSetStyle(browser, id, "visibility", "hidden");
+  await onReorder;
+
+  testAccessibleTree(acc, after);
+}
+
+async function test3(browser, accessible) {
+  let tree = {
+    SECTION: [
+      // container
+      {
+        SECTION: [
+          // parent
+          {
+            SECTION: [
+              // child
+              { TEXT_LEAF: [] },
+            ],
+          },
+        ],
+      },
+      {
+        SECTION: [
+          // parent2
+          {
+            SECTION: [
+              // child2
+              { TEXT_LEAF: [] },
+            ],
+          },
+        ],
+      },
+    ],
+  };
+  testAccessibleTree(accessible, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, "t3_container");
+  await invokeContentTask(browser, [], () => {
+    let doc = content.document;
+    doc.getElementById("t3_container").style.color = "red";
+    doc.getElementById("t3_parent").style.visibility = "hidden";
+    doc.getElementById("t3_parent2").style.visibility = "hidden";
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      // container
+      {
+        SECTION: [
+          // child
+          { TEXT_LEAF: [] },
+        ],
+      },
+      {
+        SECTION: [
+          // child2
+          { TEXT_LEAF: [] },
+        ],
+      },
+    ],
+  };
+  testAccessibleTree(accessible, tree);
+}
+
+async function test4(browser, accessible) {
+  let tree = {
+    SECTION: [{ TABLE: [{ ROW: [{ CELL: [] }] }] }],
+  };
+  testAccessibleTree(accessible, tree);
+
+  let onReorder = waitForEvent(EVENT_REORDER, "t4_parent");
+  await invokeContentTask(browser, [], () => {
+    let doc = content.document;
+    doc.getElementById("t4_container").style.color = "red";
+    doc.getElementById("t4_child").style.visibility = "visible";
+  });
+  await onReorder;
+
+  tree = {
+    SECTION: [
+      {
+        TABLE: [
+          {
+            ROW: [
+              {
+                CELL: [
+                  {
+                    SECTION: [
+                      {
+                        TEXT_LEAF: [],
+                      },
+                    ],
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+    ],
+  };
+  testAccessibleTree(accessible, tree);
+}
+
+addAccessibleTask(
+  "e10s/doc_treeupdate_visibility.html",
+  async function(browser, accDoc) {
+    let t3Container = findAccessibleChildByID(accDoc, "t3_container");
+    let t4Container = findAccessibleChildByID(accDoc, "t4_container");
+
+    await testTreeOnHide(
+      browser,
+      accDoc,
+      "t1_container",
+      "t1_parent",
+      {
+        SECTION: [
+          {
+            SECTION: [
+              {
+                SECTION: [{ TEXT_LEAF: [] }],
+              },
+            ],
+          },
+        ],
+      },
+      {
+        SECTION: [
+          {
+            SECTION: [{ TEXT_LEAF: [] }],
+          },
+        ],
+      }
+    );
+
+    await testTreeOnHide(
+      browser,
+      accDoc,
+      "t2_container",
+      "t2_grandparent",
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // grand parent
+                SECTION: [
+                  {
+                    SECTION: [
+                      {
+                        // child
+                        TEXT_LEAF: [],
+                      },
+                    ],
+                  },
+                  {
+                    SECTION: [
+                      {
+                        // child2
+                        TEXT_LEAF: [],
+                      },
+                    ],
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // child
+                TEXT_LEAF: [],
+              },
+            ],
+          },
+          {
+            SECTION: [
+              {
+                // child2
+                TEXT_LEAF: [],
+              },
+            ],
+          },
+        ],
+      }
+    );
+
+    await test3(browser, t3Container);
+    await test4(browser, t4Container);
+
+    await testTreeOnHide(
+      browser,
+      accDoc,
+      "t5_container",
+      "t5_subcontainer",
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // subcontainer
+                TABLE: [
+                  {
+                    ROW: [
+                      {
+                        CELL: [
+                          {
+                            SECTION: [
+                              {
+                                // child
+                                TEXT_LEAF: [],
+                              },
+                            ],
+                          },
+                        ],
+                      },
+                    ],
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // child
+                TEXT_LEAF: [],
+              },
+            ],
+          },
+        ],
+      }
+    );
+
+    await testTreeOnHide(
+      browser,
+      accDoc,
+      "t6_container",
+      "t6_subcontainer",
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // subcontainer
+                TABLE: [
+                  {
+                    ROW: [
+                      {
+                        CELL: [
+                          {
+                            TABLE: [
+                              {
+                                // nested table
+                                ROW: [
+                                  {
+                                    CELL: [
+                                      {
+                                        SECTION: [
+                                          {
+                                            // child
+                                            TEXT_LEAF: [],
+                                          },
+                                        ],
+                                      },
+                                    ],
+                                  },
+                                ],
+                              },
+                            ],
+                          },
+                        ],
+                      },
+                    ],
+                  },
+                ],
+              },
+              {
+                SECTION: [
+                  {
+                    // child2
+                    TEXT_LEAF: [],
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+      {
+        SECTION: [
+          {
+            // container
+            SECTION: [
+              {
+                // child
+                TEXT_LEAF: [],
+              },
+            ],
+          },
+          {
+            SECTION: [
+              {
+                // child2
+                TEXT_LEAF: [],
+              },
+            ],
+          },
+        ],
+      }
+    );
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/browser_treeupdate_whitespace.js b/accessible/tests/browser/e10s/browser_treeupdate_whitespace.js
new file mode 100644
index 0000000000..7f7e4ba97d
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_treeupdate_whitespace.js
@@ -0,0 +1,68 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  "e10s/doc_treeupdate_whitespace.html",
+  async function(browser, accDoc) {
+    let container1 = findAccessibleChildByID(accDoc, "container1");
+    let container2Parent = findAccessibleChildByID(accDoc, "container2-parent");
+
+    let tree = {
+      SECTION: [
+        { GRAPHIC: [] },
+        { TEXT_LEAF: [] },
+        { GRAPHIC: [] },
+        { TEXT_LEAF: [] },
+        { GRAPHIC: [] },
+      ],
+    };
+    testAccessibleTree(container1, tree);
+
+    let onReorder = waitForEvent(EVENT_REORDER, "container1");
+    // Remove img1 from container1
+    await invokeContentTask(browser, [], () => {
+      let doc = content.document;
+      doc.getElementById("container1").removeChild(doc.getElementById("img1"));
+    });
+    await onReorder;
+
+    tree = {
+      SECTION: [{ GRAPHIC: [] }, { TEXT_LEAF: [] }, { GRAPHIC: [] }],
+    };
+    testAccessibleTree(container1, tree);
+
+    tree = {
+      SECTION: [{ LINK: [] }, { LINK: [{ GRAPHIC: [] }] }],
+    };
+    testAccessibleTree(container2Parent, tree);
+
+    onReorder = waitForEvent(EVENT_REORDER, "container2-parent");
+    // Append an img with valid src to container2
+    await invokeContentTask(browser, [], () => {
+      let doc = content.document;
+      let img = doc.createElement("img");
+      img.setAttribute(
+        "src",
+        "http://example.com/a11y/accessible/tests/mochitest/moz.png"
+      );
+      doc.getElementById("container2").appendChild(img);
+    });
+    await onReorder;
+
+    tree = {
+      SECTION: [
+        { LINK: [{ GRAPHIC: [] }] },
+        { TEXT_LEAF: [] },
+        { LINK: [{ GRAPHIC: [] }] },
+      ],
+    };
+    testAccessibleTree(container2Parent, tree);
+  },
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_ariadialog.html b/accessible/tests/browser/e10s/doc_treeupdate_ariadialog.html
new file mode 100644
index 0000000000..9d08854b9a
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_ariadialog.html
@@ -0,0 +1,23 @@
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Tree Update ARIA Dialog Test</title>
+  </head>
+  <body id="body">
+    <div id="dialog" role="dialog" style="display: none;">
+      <table id="table" role="presentation"
+             style="display: block; position: fixed; top: 88px; left: 312.5px; z-index: 10010;">
+        <tbody>
+          <tr>
+            <td role="presentation">
+              <div role="presentation">
+                <a id="a" role="button">text</a>
+              </div>
+              <input id="input">
+            </td>
+          </tr>
+        </tbody>
+      </table>
+    </div>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_ariaowns.html b/accessible/tests/browser/e10s/doc_treeupdate_ariaowns.html
new file mode 100644
index 0000000000..38b5c333a1
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_ariaowns.html
@@ -0,0 +1,44 @@
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Tree Update ARIA Owns Test</title>
+  </head>
+  <body id="body">
+    <div id="t1_container" aria-owns="t1_checkbox t1_button">
+      <div role="button" id="t1_button"></div>
+      <div role="checkbox" id="t1_checkbox">
+        <span id="t1_span">
+          <div id="t1_subdiv"></div>
+        </span>
+      </div>
+    </div>
+    <div id="t1_group" role="group"></div>
+    <div id="t1_grouptmp" role="group"></div>
+
+    <div id="t2_container1" aria-owns="t2_owned"></div>
+    <div id="t2_container2">
+      <div id="t2_container3"><div id="t2_owned" role="checkbox"></div></div>
+    </div>
+
+    <div id="t3_container1" aria-owns="t3_child"></div>
+    <div id="t3_child" role="checkbox"></div>
+    <div id="t3_container2"></div>
+
+    <div id="t4_container1" aria-owns="t4_child1 t4_child2"></div>
+    <div id="t4_container2">
+      <div id="t4_child1" style="display:none" role="checkbox"></div>
+      <div id="t4_child2" role="radio"></div>
+    </div>
+
+    <div id="t5_container">
+      <div role="button" id="t5_button"></div>
+      <div role="checkbox" id="t5_checkbox"></div>
+      <div role="radio" id="t5_radio"></div>
+    </div>
+
+    <div id="t6_container" aria-owns="t6_fake">
+      <span id="t6_span">hey</span>
+    </div>
+    <div id="t6_fake" role="group"></div>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_imagemap.html b/accessible/tests/browser/e10s/doc_treeupdate_imagemap.html
new file mode 100644
index 0000000000..4dd230fc28
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_imagemap.html
@@ -0,0 +1,21 @@
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Tree Update Imagemap Test</title>
+  </head>
+  <body id="body">
+    <map name="atoz_map" id="map">
+      <area href="http://www.bbc.co.uk/radio4/atoz/index.shtml#b"
+            coords="17,0,30,14" alt="b" shape="rect">
+    </map>
+
+    <div id="container">
+      <img id="imgmap" width="447" height="15"
+           usemap="#atoz_map"
+           src="http://example.com/a11y/accessible/tests/mochitest/letters.gif"><!--
+      Important: no whitespace between the <img> and the </div>, so we
+      don't end up with textframes there, because those would be reflected
+      in our accessible tree in some cases.
+      --></div>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_removal.xhtml b/accessible/tests/browser/e10s/doc_treeupdate_removal.xhtml
new file mode 100644
index 0000000000..9c59fb9d11
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_removal.xhtml
@@ -0,0 +1,11 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta charset="utf-8"/>
+    <title>Tree Update Removal Test</title>
+  </head>
+  <body id="body">
+    <div id="the_displaynone" style="display: none;"></div>
+    <table id="the_table"></table>
+    <tr id="the_row"></tr>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_visibility.html b/accessible/tests/browser/e10s/doc_treeupdate_visibility.html
new file mode 100644
index 0000000000..00213b2b70
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_visibility.html
@@ -0,0 +1,78 @@
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Tree Update Visibility Test</title>
+  </head>
+  <body id="body">
+    <!-- hide parent while child stays visible -->
+    <div id="t1_container">
+      <div id="t1_parent">
+        <div id="t1_child" style="visibility: visible">text</div>
+      </div>
+    </div>
+
+    <!-- hide grandparent while its children stay visible -->
+    <div id="t2_container">
+      <div id="t2_grandparent">
+        <div id="t2_parent">
+          <div id="t2_child" style="visibility: visible">text</div>
+          <div id="t2_child2" style="visibility: visible">text</div>
+        </div>
+      </div>
+    </div>
+
+    <!-- change container style, hide parents while their children stay visible -->
+    <div id="t3_container">
+      <div id="t3_parent">
+        <div id="t3_child" style="visibility: visible">text</div>
+      </div>
+      <div id="t3_parent2">
+        <div id="t3_child2" style="visibility: visible">text</div>
+      </div>
+    </div>
+
+    <!-- change container style, show child inside the table -->
+    <div id="t4_container">
+      <table>
+        <tr>
+          <td id="t4_parent">
+            <div id="t4_child" style="visibility: hidden;">text</div>
+          </td>
+        </tr>
+      </table>
+    </div>
+
+    <!-- hide subcontainer while child inside the table stays visible -->
+    <div id="t5_container">
+      <div id="t5_subcontainer">
+        <table>
+          <tr>
+            <td>
+              <div id="t5_child" style="visibility: visible;">text</div>
+            </td>
+          </tr>
+        </table>
+      </div>
+    </div>
+
+    <!-- hide subcontainer while its child and child inside the nested table stays visible -->
+    <div id="t6_container">
+      <div id="t6_subcontainer">
+        <table>
+          <tr>
+            <td>
+              <table>
+                <tr>
+                  <td>
+                    <div id="t6_child" style="visibility: visible;">text</div>
+                  </td>
+                </tr>
+              </table>
+            </td>
+          </tr>
+        </table>
+        <div id="t6_child2" style="visibility: visible">text</div>
+      </div>
+    </div>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/doc_treeupdate_whitespace.html b/accessible/tests/browser/e10s/doc_treeupdate_whitespace.html
new file mode 100644
index 0000000000..f17dbbd60e
--- /dev/null
+++ b/accessible/tests/browser/e10s/doc_treeupdate_whitespace.html
@@ -0,0 +1,10 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta charset="utf-8"/>
+    <title>Whitespace text accessible creation/destruction</title>
+  </head>
+  <body id="body">
+    <div id="container1">  <img src="http://example.com/a11y/accessible/tests/mochitest/moz.png">  <img id="img1" src="http://example.com/a11y/accessible/tests/mochitest/moz.png">  <img src="http://example.com/a11y/accessible/tests/mochitest/moz.png">  </div>
+    <div id="container2-parent"> <a id="container2"></a> <a><img src="http://example.com/a11y/accessible/tests/mochitest/moz.png"></a> </div>
+  </body>
+</html>
diff --git a/accessible/tests/browser/e10s/head.js b/accessible/tests/browser/e10s/head.js
new file mode 100644
index 0000000000..672aa46171
--- /dev/null
+++ b/accessible/tests/browser/e10s/head.js
@@ -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/. */
+
+"use strict";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
diff --git a/accessible/tests/browser/events/browser.ini b/accessible/tests/browser/events/browser.ini
new file mode 100644
index 0000000000..fe1d15917d
--- /dev/null
+++ b/accessible/tests/browser/events/browser.ini
@@ -0,0 +1,17 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/browser/*.jsm
+
+[browser_test_docload.js]
+skip-if = e10s
+[browser_test_scrolling.js]
+[browser_test_textcaret.js]
+[browser_test_focus_browserui.js]
+skip-if = sessionHistoryInParent
+[browser_test_focus_dialog.js]
+[browser_test_focus_urlbar.js]
+[browser_test_A11yUtils_announce.js]
+[browser_test_selection_urlbar.js]
diff --git a/accessible/tests/browser/events/browser_test_A11yUtils_announce.js b/accessible/tests/browser/events/browser_test_A11yUtils_announce.js
new file mode 100644
index 0000000000..b2848f35c2
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_A11yUtils_announce.js
@@ -0,0 +1,57 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// Check that the browser A11yUtils.announce() function works correctly.
+// Note that this does not use mozilla::a11y::Accessible::Announce and a11y
+// announcement events, as these aren't yet supported on desktop.
+async function runTests() {
+  const alert = document.getElementById("a11y-announcement");
+  let alerted = waitForEvent(EVENT_ALERT, alert);
+  A11yUtils.announce({ raw: "first" });
+  let event = await alerted;
+  const alertAcc = event.accessible;
+  is(alertAcc.role, ROLE_ALERT);
+  ok(!alertAcc.name);
+  is(alertAcc.childCount, 1);
+  is(alertAcc.firstChild.name, "first");
+
+  alerted = waitForEvent(EVENT_ALERT, alertAcc);
+  A11yUtils.announce({ raw: "second" });
+  event = await alerted;
+  ok(!alertAcc.name);
+  is(alertAcc.childCount, 1);
+  is(alertAcc.firstChild.name, "second");
+
+  info("Testing Fluent message");
+  // We need a simple Fluent message here without arguments or attributes.
+  const fluentId = "search-one-offs-with-title";
+  const fluentMessage = await document.l10n.formatValue(fluentId);
+  alerted = waitForEvent(EVENT_ALERT, alertAcc);
+  A11yUtils.announce({ id: fluentId });
+  event = await alerted;
+  ok(!alertAcc.name);
+  is(alertAcc.childCount, 1);
+  is(alertAcc.firstChild.name, fluentMessage);
+
+  info("Ensuring Fluent message is cancelled if announce is re-entered");
+  alerted = waitForEvent(EVENT_ALERT, alertAcc);
+  // This call runs async.
+  let asyncAnnounce = A11yUtils.announce({ id: fluentId });
+  // Before the async call finishes, call announce again.
+  A11yUtils.announce({ raw: "third" });
+  // Wait for the async call to complete.
+  await asyncAnnounce;
+  event = await alerted;
+  ok(!alertAcc.name);
+  is(alertAcc.childCount, 1);
+  // The async call should have been cancelled. If it wasn't, we would get
+  // fluentMessage here instead of "third".
+  is(alertAcc.firstChild.name, "third");
+}
+
+addAccessibleTask(``, runTests);
diff --git a/accessible/tests/browser/events/browser_test_docload.js b/accessible/tests/browser/events/browser_test_docload.js
new file mode 100644
index 0000000000..53722a582a
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_docload.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/. */
+
+"use strict";
+
+function busyChecker(isBusy) {
+  return function(event) {
+    let scEvent;
+    try {
+      scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+    } catch (e) {
+      return false;
+    }
+
+    return scEvent.state == STATE_BUSY && scEvent.isEnabled == isBusy;
+  };
+}
+
+function inIframeChecker(iframeId) {
+  return function(event) {
+    return getAccessibleDOMNodeID(event.accessibleDocument.parent) == iframeId;
+  };
+}
+
+function urlChecker(url) {
+  return function(event) {
+    info(`${event.accessibleDocument.URL} == ${url}`);
+    return event.accessibleDocument.URL == url;
+  };
+}
+
+async function runTests(browser, accDoc) {
+  let onLoadEvents = waitForEvents({
+    expected: [
+      [EVENT_REORDER, getAccessible(browser)],
+      [EVENT_DOCUMENT_LOAD_COMPLETE, "body2"],
+      [EVENT_STATE_CHANGE, busyChecker(false)],
+    ],
+    unexpected: [
+      [EVENT_DOCUMENT_LOAD_COMPLETE, inIframeChecker("iframe1")],
+      [EVENT_STATE_CHANGE, inIframeChecker("iframe1")],
+    ],
+  });
+
+  BrowserTestUtils.loadURI(
+    browser,
+    `data:text/html;charset=utf-8,
+    <html><body id="body2">
+      <iframe id="iframe1" src="http://example.com"></iframe>
+    </body></html>`
+  );
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_LOAD_COMPLETE, urlChecker("about:about")],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+    [EVENT_REORDER, getAccessible(browser)],
+  ]);
+
+  BrowserTestUtils.loadURI(browser, "about:about");
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_RELOAD, evt => evt.isFromUserInput],
+    [EVENT_REORDER, getAccessible(browser)],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+  ]);
+
+  EventUtils.synthesizeKey("VK_F5", {}, browser.ownerGlobal);
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_LOAD_COMPLETE, urlChecker("about:mozilla")],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+    [EVENT_REORDER, getAccessible(browser)],
+  ]);
+
+  BrowserTestUtils.loadURI(browser, "about:mozilla");
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_RELOAD, evt => !evt.isFromUserInput],
+    [EVENT_REORDER, getAccessible(browser)],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+  ]);
+
+  browser.reload();
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_LOAD_COMPLETE, urlChecker("http://www.wronguri.wronguri/")],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+    [EVENT_REORDER, getAccessible(browser)],
+  ]);
+
+  BrowserTestUtils.loadURI(browser, "http://www.wronguri.wronguri/");
+
+  await onLoadEvents;
+
+  onLoadEvents = waitForEvents([
+    [EVENT_DOCUMENT_LOAD_COMPLETE, urlChecker("https://nocert.example.com/")],
+    [EVENT_STATE_CHANGE, busyChecker(false)],
+    [EVENT_REORDER, getAccessible(browser)],
+  ]);
+
+  BrowserTestUtils.loadURI(browser, "https://nocert.example.com:443/");
+
+  await onLoadEvents;
+}
+
+/**
+ * Test caching of accessible object states
+ */
+addAccessibleTask("", runTests);
diff --git a/accessible/tests/browser/events/browser_test_focus_browserui.js b/accessible/tests/browser/events/browser_test_focus_browserui.js
new file mode 100644
index 0000000000..98fc735269
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_focus_browserui.js
@@ -0,0 +1,52 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts(
+  { name: "states.js", dir: MOCHITESTS_DIR },
+  { name: "role.js", dir: MOCHITESTS_DIR }
+);
+
+async function runTests(browser, accDoc) {
+  let onFocus = waitForEvent(EVENT_FOCUS, "input");
+  EventUtils.synthesizeKey("VK_TAB", {}, browser.ownerGlobal);
+  let evt = await onFocus;
+  testStates(evt.accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "buttonInputDoc");
+  let url = snippetToURL(`<input id="input" type="button" value="button">`, {
+    contentDocBodyAttrs: { id: "buttonInputDoc" },
+  });
+  browser.loadURI(url, {
+    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+  });
+  evt = await onFocus;
+  testStates(evt.accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "input");
+  browser.goBack();
+  evt = await onFocus;
+  testStates(evt.accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(
+    EVENT_FOCUS,
+    event => event.accessible.DOMNode == gURLBar.inputField
+  );
+  EventUtils.synthesizeKey("t", { accelKey: true }, browser.ownerGlobal);
+  evt = await onFocus;
+  testStates(evt.accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "input");
+  EventUtils.synthesizeKey("w", { accelKey: true }, browser.ownerGlobal);
+  evt = await onFocus;
+  testStates(evt.accessible, STATE_FOCUSED);
+}
+
+/**
+ * Accessibility loading document events test.
+ */
+addAccessibleTask(`<input id="input">`, runTests);
diff --git a/accessible/tests/browser/events/browser_test_focus_dialog.js b/accessible/tests/browser/events/browser_test_focus_dialog.js
new file mode 100644
index 0000000000..71485a678d
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_focus_dialog.js
@@ -0,0 +1,76 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts(
+  { name: "states.js", dir: MOCHITESTS_DIR },
+  { name: "role.js", dir: MOCHITESTS_DIR }
+);
+
+async function runTests(browser, accDoc) {
+  let onFocus = waitForEvent(EVENT_FOCUS, "button");
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("button").focus();
+  });
+  let button = (await onFocus).accessible;
+  testStates(button, STATE_FOCUSED);
+
+  // Bug 1377942 - The target of the focus event changes under different
+  // circumstances.
+  // In e10s the focus event is the new window, in non-e10s it's the doc.
+  onFocus = waitForEvent(EVENT_FOCUS, () => true);
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+  // button should be blurred
+  await onFocus;
+  testStates(button, 0, 0, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "button");
+  await BrowserTestUtils.closeWindow(newWin);
+  testStates((await onFocus).accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "body2");
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document
+      .getElementById("editabledoc")
+      .contentWindow.document.body.focus();
+  });
+  testStates((await onFocus).accessible, STATE_FOCUSED);
+
+  onFocus = waitForEvent(EVENT_FOCUS, "body2");
+  newWin = await BrowserTestUtils.openNewBrowserWindow();
+  await BrowserTestUtils.closeWindow(newWin);
+  testStates((await onFocus).accessible, STATE_FOCUSED);
+
+  let onShow = waitForEvent(EVENT_SHOW, "alertdialog");
+  onFocus = waitForEvent(EVENT_FOCUS, "alertdialog");
+  await SpecialPowers.spawn(browser, [], () => {
+    let alertDialog = content.document.getElementById("alertdialog");
+    alertDialog.style.display = "block";
+    alertDialog.focus();
+  });
+  await onShow;
+  testStates((await onFocus).accessible, STATE_FOCUSED);
+}
+
+/**
+ * Accessible dialog focus testing
+ */
+addAccessibleTask(
+  `
+  <button id="button">button</button>
+  <iframe id="editabledoc"
+          src="${snippetToURL("", {
+            contentDocBodyAttrs: { id: "body2", contentEditable: "true" },
+          })}">
+  </iframe>
+  <div id="alertdialog" style="display: none" tabindex="-1" role="alertdialog" aria-labelledby="title2" aria-describedby="desc2">
+    <div id="title2">Blah blah</div>
+    <div id="desc2">Woof woof woof.</div>
+    <button>Close</button>
+  </div>`,
+  runTests
+);
diff --git a/accessible/tests/browser/events/browser_test_focus_urlbar.js b/accessible/tests/browser/events/browser_test_focus_urlbar.js
new file mode 100644
index 0000000000..874a0e239b
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_focus_urlbar.js
@@ -0,0 +1,410 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts(
+  { name: "states.js", dir: MOCHITESTS_DIR },
+  { name: "role.js", dir: MOCHITESTS_DIR }
+);
+
+XPCOMUtils.defineLazyModuleGetters(this, {
+  PlacesTestUtils: "resource://testing-common/PlacesTestUtils.jsm",
+  PlacesUtils: "resource://gre/modules/PlacesUtils.jsm",
+  UrlbarProvider: "resource:///modules/UrlbarUtils.jsm",
+  UrlbarProvidersManager: "resource:///modules/UrlbarProvidersManager.jsm",
+  UrlbarResult: "resource:///modules/UrlbarResult.jsm",
+  UrlbarTestUtils: "resource://testing-common/UrlbarTestUtils.jsm",
+  UrlbarUtils: "resource:///modules/UrlbarUtils.jsm",
+});
+
+function isEventForAutocompleteItem(event) {
+  return event.accessible.role == ROLE_COMBOBOX_OPTION;
+}
+
+function isEventForButton(event) {
+  return event.accessible.role == ROLE_PUSHBUTTON;
+}
+
+function isEventForOneOffEngine(event) {
+  let parent = event.accessible.parent;
+  return (
+    event.accessible.role == ROLE_PUSHBUTTON &&
+    parent &&
+    parent.role == ROLE_GROUPING &&
+    parent.name
+  );
+}
+
+function isEventForMenuPopup(event) {
+  return event.accessible.role == ROLE_MENUPOPUP;
+}
+
+function isEventForMenuItem(event) {
+  return event.accessible.role == ROLE_MENUITEM;
+}
+
+function isEventForTipButton(event) {
+  let parent = event.accessible.parent;
+  return (
+    event.accessible.role == ROLE_PUSHBUTTON &&
+    parent &&
+    parent.role == ROLE_GROUPING &&
+    parent.name
+  );
+}
+
+/**
+ * A test provider.
+ */
+class TipTestProvider extends UrlbarProvider {
+  constructor(matches) {
+    super();
+    this._matches = matches;
+  }
+  get name() {
+    return "TipTestProvider";
+  }
+  get type() {
+    return UrlbarUtils.PROVIDER_TYPE.PROFILE;
+  }
+  isActive(context) {
+    return true;
+  }
+  isRestricting(context) {
+    return true;
+  }
+  async startQuery(context, addCallback) {
+    this._context = context;
+    for (const match of this._matches) {
+      addCallback(this, match);
+    }
+  }
+}
+
+// Check that the URL bar manages accessibility focus appropriately.
+async function runTests() {
+  registerCleanupFunction(async function() {
+    await UrlbarTestUtils.promisePopupClose(window);
+    await PlacesUtils.history.clear();
+  });
+
+  await PlacesTestUtils.addVisits([
+    "http://example1.com/blah",
+    "http://example2.com/blah",
+    "http://example1.com/",
+    "http://example2.com/",
+  ]);
+
+  // Ensure initial state.
+  await UrlbarTestUtils.promisePopupClose(window);
+
+  let focused = waitForEvent(
+    EVENT_FOCUS,
+    event => event.accessible.role == ROLE_ENTRY
+  );
+  gURLBar.focus();
+  let event = await focused;
+  let textBox = event.accessible;
+  // Ensure the URL bar is ready for a new URL to be typed.
+  // Sometimes, when this test runs, the existing text isn't selected when the
+  // URL bar is focused. Pressing escape twice ensures that the popup is
+  // closed and that the existing text is selected.
+  EventUtils.synthesizeKey("KEY_Escape");
+  EventUtils.synthesizeKey("KEY_Escape");
+
+  info("Ensuring no focus change when first text is typed");
+  await UrlbarTestUtils.promiseAutocompleteResultPopup({
+    window,
+    waitForFocus,
+    value: "example",
+    fireInputEvent: true,
+  });
+  // Wait a tick for a11y events to fire.
+  await TestUtils.waitForTick();
+  testStates(textBox, STATE_FOCUSED);
+
+  info("Ensuring no focus change on backspace");
+  EventUtils.synthesizeKey("KEY_Backspace");
+  await UrlbarTestUtils.promiseSearchComplete(window);
+  // Wait a tick for a11y events to fire.
+  await TestUtils.waitForTick();
+  testStates(textBox, STATE_FOCUSED);
+
+  info("Ensuring no focus change on text selection and delete");
+  EventUtils.synthesizeKey("KEY_ArrowLeft", { shiftKey: true });
+  EventUtils.synthesizeKey("KEY_Delete");
+  await UrlbarTestUtils.promiseSearchComplete(window);
+  // Wait a tick for a11y events to fire.
+  await TestUtils.waitForTick();
+  testStates(textBox, STATE_FOCUSED);
+
+  info("Ensuring autocomplete focus on down arrow (1)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring focus of another autocomplete item on down arrow");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring previous arrow selection state doesn't get stale on input");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.sendString("z");
+  await focused;
+  EventUtils.synthesizeKey("KEY_Backspace");
+  await UrlbarTestUtils.promiseSearchComplete(window);
+  testStates(textBox, STATE_FOCUSED);
+
+  info("Ensuring focus of another autocomplete item on down arrow");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  if (AppConstants.platform == "macosx") {
+    info("Ensuring focus of another autocomplete item on ctrl-n");
+    focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+    EventUtils.synthesizeKey("n", { ctrlKey: true });
+    event = await focused;
+    testStates(event.accessible, STATE_FOCUSED);
+
+    info("Ensuring focus of another autocomplete item on ctrl-p");
+    focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+    EventUtils.synthesizeKey("p", { ctrlKey: true });
+    event = await focused;
+    testStates(event.accessible, STATE_FOCUSED);
+  }
+
+  info("Ensuring focus of another autocomplete item on up arrow");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowUp");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring text box focus on left arrow");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.synthesizeKey("KEY_ArrowLeft");
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+
+  gURLBar.view.close();
+  // On Mac, down arrow when not at the end of the field moves to the end.
+  // Move back to the end so the next press of down arrow opens the popup.
+  EventUtils.synthesizeKey("KEY_ArrowRight");
+
+  info("Ensuring autocomplete focus on down arrow (2)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring autocomplete focus on arrow up for search settings button");
+  focused = waitForEvent(EVENT_FOCUS, isEventForButton);
+  EventUtils.synthesizeKey("KEY_ArrowUp");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring text box focus when text is typed");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.sendString("z");
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+  EventUtils.synthesizeKey("KEY_Backspace");
+  await UrlbarTestUtils.promiseSearchComplete(window);
+
+  info("Ensuring autocomplete focus on down arrow (3)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring text box focus on backspace");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.synthesizeKey("KEY_Backspace");
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+  await UrlbarTestUtils.promiseSearchComplete(window);
+
+  info("Ensuring autocomplete focus on arrow down (4)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  // Arrow down to the last result.
+  const resultCount = UrlbarTestUtils.getResultCount(window);
+  while (UrlbarTestUtils.getSelectedRowIndex(window) != resultCount - 1) {
+    EventUtils.synthesizeKey("KEY_ArrowDown");
+  }
+
+  info("Ensuring one-off search button focus on arrow down");
+  focused = waitForEvent(EVENT_FOCUS, isEventForOneOffEngine);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring autocomplete focus on arrow up");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowUp");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring text box focus on text selection");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.synthesizeKey("KEY_ArrowLeft", { shiftKey: true });
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+
+  if (AppConstants.platform == "macosx") {
+    // On Mac, ctrl-n after arrow left/right does not re-open the popup.
+    // Type some text so the next press of ctrl-n opens the popup.
+    EventUtils.sendString("ple");
+
+    info("Ensuring autocomplete focus on ctrl-n");
+    focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+    EventUtils.synthesizeKey("n", { ctrlKey: true });
+    event = await focused;
+    testStates(event.accessible, STATE_FOCUSED);
+  }
+
+  info(
+    "Ensuring context menu gets menu event on launch, item focus on down, and address bar focus on escape."
+  );
+  let menuEvent = waitForEvent(
+    nsIAccessibleEvent.EVENT_MENUPOPUP_START,
+    isEventForMenuPopup
+  );
+  await EventUtils.sendMouseEvent(
+    { type: "contextmenu" },
+    gURLBar.querySelector("moz-input-box")
+  );
+  await menuEvent;
+
+  focused = waitForEvent(EVENT_FOCUS, isEventForMenuItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  let closed = waitForEvent(
+    nsIAccessibleEvent.EVENT_MENUPOPUP_END,
+    isEventForMenuPopup
+  );
+  EventUtils.synthesizeKey("KEY_Escape");
+  await closed;
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+}
+
+// We test TIP results in their own test so the spoofed results don't interfere
+// with the main test.
+async function runTipTests() {
+  let matches = [
+    new UrlbarResult(
+      UrlbarUtils.RESULT_TYPE.URL,
+      UrlbarUtils.RESULT_SOURCE.HISTORY,
+      { url: "http://mozilla.org/a" }
+    ),
+    new UrlbarResult(
+      UrlbarUtils.RESULT_TYPE.TIP,
+      UrlbarUtils.RESULT_SOURCE.OTHER_LOCAL,
+      {
+        icon: "",
+        text: "This is a test intervention.",
+        buttonText: "Done",
+        type: "test",
+        helpUrl: "about:blank",
+        buttonUrl: "about:mozilla",
+      }
+    ),
+    new UrlbarResult(
+      UrlbarUtils.RESULT_TYPE.URL,
+      UrlbarUtils.RESULT_SOURCE.HISTORY,
+      { url: "http://mozilla.org/b" }
+    ),
+    new UrlbarResult(
+      UrlbarUtils.RESULT_TYPE.URL,
+      UrlbarUtils.RESULT_SOURCE.HISTORY,
+      { url: "http://mozilla.org/c" }
+    ),
+  ];
+
+  // Ensure the tip appears in the expected position.
+  matches[1].suggestedIndex = 2;
+
+  let provider = new TipTestProvider(matches);
+  UrlbarProvidersManager.registerProvider(provider);
+
+  registerCleanupFunction(async function() {
+    UrlbarProvidersManager.unregisterProvider(provider);
+  });
+
+  let focused = waitForEvent(
+    EVENT_FOCUS,
+    event => event.accessible.role == ROLE_ENTRY
+  );
+  gURLBar.focus();
+  let event = await focused;
+  let textBox = event.accessible;
+
+  EventUtils.synthesizeKey("KEY_Escape");
+  EventUtils.synthesizeKey("KEY_Escape");
+
+  info("Ensuring no focus change when first text is typed");
+  await UrlbarTestUtils.promiseAutocompleteResultPopup({
+    window,
+    waitForFocus,
+    value: "example",
+    fireInputEvent: true,
+  });
+  // Wait a tick for a11y events to fire.
+  await TestUtils.waitForTick();
+  testStates(textBox, STATE_FOCUSED);
+
+  info("Ensuring autocomplete focus on down arrow (1)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring the tip button is focused on down arrow");
+  info("Also ensuring that the tip button is a part of a labelled group");
+  focused = waitForEvent(EVENT_FOCUS, isEventForTipButton);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring the help button is focused on down arrow");
+  info("Also ensuring that the help button is a part of a labelled group");
+  focused = waitForEvent(EVENT_FOCUS, isEventForTipButton);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring autocomplete focus on down arrow (2)");
+  focused = waitForEvent(EVENT_FOCUS, isEventForAutocompleteItem);
+  EventUtils.synthesizeKey("KEY_ArrowDown");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring the help button is focused on up arrow");
+  focused = waitForEvent(EVENT_FOCUS, isEventForTipButton);
+  EventUtils.synthesizeKey("KEY_ArrowUp");
+  event = await focused;
+  testStates(event.accessible, STATE_FOCUSED);
+
+  info("Ensuring text box focus on left arrow, and not back to the tip button");
+  focused = waitForEvent(EVENT_FOCUS, textBox);
+  EventUtils.synthesizeKey("KEY_ArrowLeft");
+  await focused;
+  testStates(textBox, STATE_FOCUSED);
+}
+
+addAccessibleTask(``, runTests);
+addAccessibleTask(``, runTipTests);
diff --git a/accessible/tests/browser/events/browser_test_scrolling.js b/accessible/tests/browser/events/browser_test_scrolling.js
new file mode 100644
index 0000000000..d9a4a0a73f
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_scrolling.js
@@ -0,0 +1,96 @@
+/* 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";
+
+addAccessibleTask(
+  `
+    <div style="height: 100vh" id="one">one</div>
+    <div style="height: 100vh" id="two">two</div>
+    <div style="height: 100vh; width: 200vw; overflow: auto;" id="three">
+      <div style="height: 300%;">three</div>
+    </div>`,
+  async function(browser, accDoc) {
+    let onScrolling = waitForEvents([
+      [EVENT_SCROLLING, accDoc],
+      [EVENT_SCROLLING_END, accDoc],
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.location.hash = "#two";
+    });
+    let [scrollEvent1, scrollEndEvent1] = await onScrolling;
+    scrollEvent1.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEvent1.maxScrollY >= scrollEvent1.scrollY,
+      "scrollY is within max"
+    );
+    scrollEndEvent1.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEndEvent1.maxScrollY >= scrollEndEvent1.scrollY,
+      "scrollY is within max"
+    );
+
+    onScrolling = waitForEvents([
+      [EVENT_SCROLLING, accDoc],
+      [EVENT_SCROLLING_END, accDoc],
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.location.hash = "#three";
+    });
+    let [scrollEvent2, scrollEndEvent2] = await onScrolling;
+    scrollEvent2.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEvent2.scrollY > scrollEvent1.scrollY,
+      `${scrollEvent2.scrollY} > ${scrollEvent1.scrollY}`
+    );
+    scrollEndEvent2.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEndEvent2.maxScrollY >= scrollEndEvent2.scrollY,
+      "scrollY is within max"
+    );
+
+    onScrolling = waitForEvents([
+      [EVENT_SCROLLING, accDoc],
+      [EVENT_SCROLLING_END, accDoc],
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.scrollTo(10, 0);
+    });
+    let [scrollEvent3, scrollEndEvent3] = await onScrolling;
+    scrollEvent3.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEvent3.maxScrollX >= scrollEvent3.scrollX,
+      "scrollX is within max"
+    );
+    scrollEndEvent3.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEndEvent3.maxScrollX >= scrollEndEvent3.scrollX,
+      "scrollY is within max"
+    );
+    ok(
+      scrollEvent3.scrollX > scrollEvent2.scrollX,
+      `${scrollEvent3.scrollX} > ${scrollEvent2.scrollX}`
+    );
+
+    // non-doc scrolling
+    onScrolling = waitForEvents([
+      [EVENT_SCROLLING, "three"],
+      [EVENT_SCROLLING_END, "three"],
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.querySelector("#three").scrollTo(0, 10);
+    });
+    let [scrollEvent4, scrollEndEvent4] = await onScrolling;
+    scrollEvent4.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEvent4.maxScrollY >= scrollEvent4.scrollY,
+      "scrollY is within max"
+    );
+    scrollEndEvent4.QueryInterface(nsIAccessibleScrollingEvent);
+    ok(
+      scrollEndEvent4.maxScrollY >= scrollEndEvent4.scrollY,
+      "scrollY is within max"
+    );
+  }
+);
diff --git a/accessible/tests/browser/events/browser_test_selection_urlbar.js b/accessible/tests/browser/events/browser_test_selection_urlbar.js
new file mode 100644
index 0000000000..0a773ce896
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_selection_urlbar.js
@@ -0,0 +1,58 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+XPCOMUtils.defineLazyModuleGetters(this, {
+  BrowserTestUtils: "resource://testing-common/BrowserTestUtils.jsm",
+  PlacesTestUtils: "resource://testing-common/PlacesTestUtils.jsm",
+  UrlbarTestUtils: "resource://testing-common/UrlbarTestUtils.jsm",
+});
+
+// Check that the URL bar manages accessibility
+// selection notifications appropriately on startup (new window).
+async function runTests() {
+  let focused = waitForEvent(
+    EVENT_FOCUS,
+    event => event.accessible.role == ROLE_ENTRY
+  );
+  info("Creating new window");
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+  await PlacesTestUtils.addVisits("http://addons.mozilla.org");
+
+  registerCleanupFunction(async function() {
+    await BrowserTestUtils.closeWindow(newWin);
+    await PlacesUtils.history.clear();
+  });
+  info("Focusing window");
+  newWin.focus();
+  await focused;
+
+  // Ensure the URL bar is ready for a new URL to be typed.
+  // Sometimes, when this test runs, the existing text isn't selected when the
+  // URL bar is focused. Pressing escape twice ensures that the popup is
+  // closed and that the existing text is selected.
+  EventUtils.synthesizeKey("KEY_Escape", {}, newWin);
+  EventUtils.synthesizeKey("KEY_Escape", {}, newWin);
+  let caretMoved = waitForEvent(
+    EVENT_TEXT_CARET_MOVED,
+    event => event.accessible.role == ROLE_ENTRY
+  );
+
+  info("Autofilling after typing `a` in new window URL bar.");
+  EventUtils.synthesizeKey("a", {}, newWin);
+  await UrlbarTestUtils.promiseSearchComplete(newWin);
+  Assert.equal(
+    newWin.gURLBar.inputField.value,
+    "addons.mozilla.org/",
+    "autofilled value as expected"
+  );
+
+  info("Ensuring caret moved on text selection");
+  await caretMoved;
+}
+
+addAccessibleTask(``, runTests);
diff --git a/accessible/tests/browser/events/browser_test_textcaret.js b/accessible/tests/browser/events/browser_test_textcaret.js
new file mode 100644
index 0000000000..d4e0f11a0f
--- /dev/null
+++ b/accessible/tests/browser/events/browser_test_textcaret.js
@@ -0,0 +1,58 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Caret move events checker.
+ */
+function caretMoveChecker(target, caretOffset) {
+  return function(event) {
+    let cmEvent = event.QueryInterface(nsIAccessibleCaretMoveEvent);
+    return (
+      cmEvent.accessible == getAccessible(target) &&
+      cmEvent.caretOffset == caretOffset
+    );
+  };
+}
+
+async function checkURLBarCaretEvents() {
+  const kURL = "about:mozilla";
+  let newWin = await BrowserTestUtils.openNewBrowserWindow();
+  BrowserTestUtils.loadURI(newWin.gBrowser.selectedBrowser, kURL);
+  newWin.gBrowser.selectedBrowser.focus();
+
+  await waitForEvent(EVENT_DOCUMENT_LOAD_COMPLETE, event => {
+    try {
+      return event.accessible.QueryInterface(nsIAccessibleDocument).URL == kURL;
+    } catch (e) {
+      return false;
+    }
+  });
+  info("Loaded " + kURL);
+
+  let urlbarInputEl = newWin.gURLBar.inputField;
+  let urlbarInput = getAccessible(urlbarInputEl, [nsIAccessibleText]);
+
+  let onCaretMove = waitForEvents([
+    [EVENT_TEXT_CARET_MOVED, caretMoveChecker(urlbarInput, kURL.length)],
+    [EVENT_FOCUS, urlbarInput],
+  ]);
+
+  urlbarInput.caretOffset = -1;
+  await onCaretMove;
+  ok(true, "Caret move in URL bar #1");
+
+  onCaretMove = waitForEvent(
+    EVENT_TEXT_CARET_MOVED,
+    caretMoveChecker(urlbarInput, 0)
+  );
+
+  urlbarInput.caretOffset = 0;
+  await onCaretMove;
+  ok(true, "Caret move in URL bar #2");
+
+  await BrowserTestUtils.closeWindow(newWin);
+}
+
+add_task(checkURLBarCaretEvents);
diff --git a/accessible/tests/browser/events/head.js b/accessible/tests/browser/events/head.js
new file mode 100644
index 0000000000..672aa46171
--- /dev/null
+++ b/accessible/tests/browser/events/head.js
@@ -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/. */
+
+"use strict";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
diff --git a/accessible/tests/browser/fission/browser.ini b/accessible/tests/browser/fission/browser.ini
new file mode 100644
index 0000000000..a3fc7aa839
--- /dev/null
+++ b/accessible/tests/browser/fission/browser.ini
@@ -0,0 +1,14 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+
+[browser_content_tree.js]
+[browser_hidden_iframe.js]
+[browser_nested_iframe.js]
+[browser_reframe_root.js]
+[browser_reframe_visibility.js]
+[browser_src_change.js]
+[browser_take_focus.js]
diff --git a/accessible/tests/browser/fission/browser_content_tree.js b/accessible/tests/browser/fission/browser_content_tree.js
new file mode 100644
index 0000000000..54df06c7f4
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_content_tree.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `<table id="table">
+    <tr>
+      <td>cell1</td>
+      <td>cell2</td>
+    </tr>
+  </table>
+  <ul id="ul">
+    <li id="li">item1</li>
+  </ul>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    ok(iframeDocAcc, "IFRAME document accessible is present");
+    (gIsRemoteIframe ? isnot : is)(
+      browser.browsingContext.currentWindowGlobal.osPid,
+      browser.browsingContext.children[0].currentWindowGlobal.osPid,
+      `Content and IFRAME documents are in ${
+        gIsRemoteIframe ? "separate processes" : "same process"
+      }.`
+    );
+
+    const tree = {
+      DOCUMENT: [
+        {
+          INTERNAL_FRAME: [
+            {
+              DOCUMENT: [
+                {
+                  TABLE: [
+                    {
+                      ROW: [
+                        { CELL: [{ TEXT_LEAF: [] }] },
+                        { CELL: [{ TEXT_LEAF: [] }] },
+                      ],
+                    },
+                  ],
+                },
+                {
+                  LIST: [
+                    {
+                      LISTITEM: [{ LISTITEM_MARKER: [] }, { TEXT_LEAF: [] }],
+                    },
+                  ],
+                },
+              ],
+            },
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(contentDocAcc, tree);
+
+    const iframeAcc = contentDocAcc.getChildAt(0);
+    is(
+      iframeAcc.getChildAt(0),
+      iframeDocAcc,
+      "Document for the IFRAME matches IFRAME's first child."
+    );
+
+    is(
+      iframeDocAcc.parent,
+      iframeAcc,
+      "IFRAME document's parent matches the IFRAME."
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/browser_hidden_iframe.js b/accessible/tests/browser/fission/browser_hidden_iframe.js
new file mode 100644
index 0000000000..94b3015424
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_hidden_iframe.js
@@ -0,0 +1,81 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "states.js", dir: MOCHITESTS_DIR });
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function(browser, contentDocAcc) {
+    info(
+      "Check that the IFRAME and the IFRAME document are not accessible initially."
+    );
+    let iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    let iframeDocAcc = findAccessibleChildByID(
+      contentDocAcc,
+      DEFAULT_IFRAME_DOC_BODY_ID
+    );
+    ok(!iframeAcc, "IFRAME is hidden and should not be accessible");
+    ok(!iframeDocAcc, "IFRAME document is hidden and should be accessible");
+
+    info(
+      "Show the IFRAME and check that it's now available in the accessibility tree."
+    );
+
+    const events = [[EVENT_REORDER, contentDocAcc]];
+    // Until this event is fired, IFRAME accessible has no children attached.
+    events.push([
+      EVENT_STATE_CHANGE,
+      event => {
+        const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+        const id = getAccessibleDOMNodeID(event.accessible);
+        return (
+          id === DEFAULT_IFRAME_DOC_BODY_ID &&
+          scEvent.state === STATE_BUSY &&
+          scEvent.isEnabled === false
+        );
+      },
+    ]);
+
+    const onEvents = waitForEvents(events);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], contentId => {
+      content.document.getElementById(contentId).style.display = "";
+    });
+    await onEvents;
+
+    iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    iframeDocAcc = findAccessibleChildByID(
+      contentDocAcc,
+      DEFAULT_IFRAME_DOC_BODY_ID
+    );
+
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+    is(iframeAcc.childCount, 1, "IFRAME accessible should have a single child");
+    ok(iframeDocAcc, "IFRAME document exists");
+    ok(!isDefunct(iframeDocAcc), "IFRAME document should be accessible");
+    is(
+      iframeAcc.firstChild,
+      iframeDocAcc,
+      "An accessible for a IFRAME document is the child of the IFRAME accessible"
+    );
+    is(
+      iframeDocAcc.parent,
+      iframeAcc,
+      "IFRAME document's parent matches the IFRAME."
+    );
+  },
+  {
+    topLevel: false,
+    iframe: true,
+    remoteIframe: true,
+    iframeAttrs: {
+      style: "display: none;",
+    },
+    skipFissionDocLoad: true,
+  }
+);
diff --git a/accessible/tests/browser/fission/browser_nested_iframe.js b/accessible/tests/browser/fission/browser_nested_iframe.js
new file mode 100644
index 0000000000..0e48d767f8
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_nested_iframe.js
@@ -0,0 +1,153 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+const NESTED_IFRAME_DOC_BODY_ID = "nested-iframe-body";
+const NESTED_IFRAME_ID = "nested-iframe";
+const nestedURL = new URL(`http://example.com/document-builder.sjs`);
+nestedURL.searchParams.append(
+  "html",
+  `<html>
+      <head>
+        <meta charset="utf-8"/>
+        <title>Accessibility Nested Iframe Frame Test</title>
+      </head>
+      <body id="${NESTED_IFRAME_DOC_BODY_ID}">
+        <table id="table">
+          <tr>
+            <td>cell1</td>
+            <td>cell2</td>
+          </tr>
+        </table>
+        <ul id="ul">
+          <li id="li">item1</li>
+        </ul>
+      </body>
+    </html>`
+);
+
+function getOsPid(browsingContext) {
+  return browsingContext.currentWindowGlobal.osPid;
+}
+
+addAccessibleTask(
+  `<iframe id="${NESTED_IFRAME_ID}" src="${nestedURL.href}"/>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    let nestedDocAcc = findAccessibleChildByID(
+      iframeDocAcc,
+      NESTED_IFRAME_DOC_BODY_ID
+    );
+
+    ok(iframeDocAcc, "IFRAME document accessible is present");
+    ok(nestedDocAcc, "Nested IFRAME document accessible is present");
+
+    const state = {};
+    nestedDocAcc.getState(state, {});
+    if (state.value & STATE_BUSY) {
+      nestedDocAcc = (
+        await waitForEvent(
+          EVENT_DOCUMENT_LOAD_COMPLETE,
+          NESTED_IFRAME_DOC_BODY_ID
+        )
+      ).accessible;
+    }
+
+    if (gIsRemoteIframe) {
+      isnot(
+        getOsPid(browser.browsingContext),
+        getOsPid(browser.browsingContext.children[0]),
+        `Content and IFRAME documents are in separate processes.`
+      );
+      isnot(
+        getOsPid(browser.browsingContext),
+        getOsPid(browser.browsingContext.children[0].children[0]),
+        `Content and nested IFRAME documents are in separate processes.`
+      );
+      isnot(
+        getOsPid(browser.browsingContext.children[0]),
+        getOsPid(browser.browsingContext.children[0].children[0]),
+        `IFRAME and nested IFRAME documents are in separate processes.`
+      );
+    } else {
+      is(
+        getOsPid(browser.browsingContext),
+        getOsPid(browser.browsingContext.children[0]),
+        `Content and IFRAME documents are in same processes.`
+      );
+      if (gFissionBrowser) {
+        isnot(
+          getOsPid(browser.browsingContext.children[0]),
+          getOsPid(browser.browsingContext.children[0].children[0]),
+          `IFRAME and nested IFRAME documents are in separate processes.`
+        );
+      } else {
+        is(
+          getOsPid(browser.browsingContext),
+          getOsPid(browser.browsingContext.children[0].children[0]),
+          `Content and nested IFRAME documents are in same processes.`
+        );
+      }
+    }
+
+    const tree = {
+      DOCUMENT: [
+        {
+          INTERNAL_FRAME: [
+            {
+              DOCUMENT: [
+                {
+                  INTERNAL_FRAME: [
+                    {
+                      DOCUMENT: [
+                        {
+                          TABLE: [
+                            {
+                              ROW: [
+                                { CELL: [{ TEXT_LEAF: [] }] },
+                                { CELL: [{ TEXT_LEAF: [] }] },
+                              ],
+                            },
+                          ],
+                        },
+                        {
+                          LIST: [
+                            {
+                              LISTITEM: [
+                                { LISTITEM_MARKER: [] },
+                                { TEXT_LEAF: [] },
+                              ],
+                            },
+                          ],
+                        },
+                      ],
+                    },
+                  ],
+                },
+              ],
+            },
+          ],
+        },
+      ],
+    };
+    testAccessibleTree(contentDocAcc, tree);
+
+    const nestedIframeAcc = iframeDocAcc.getChildAt(0);
+    is(
+      nestedIframeAcc.getChildAt(0),
+      nestedDocAcc,
+      "Document for nested IFRAME matches."
+    );
+
+    is(
+      nestedDocAcc.parent,
+      nestedIframeAcc,
+      "Nested IFRAME document's parent matches the nested IFRAME."
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/browser_reframe_root.js b/accessible/tests/browser/fission/browser_reframe_root.js
new file mode 100644
index 0000000000..66dcf249bf
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_reframe_root.js
@@ -0,0 +1,95 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    info(
+      "Check that the IFRAME and the IFRAME document are accessible initially."
+    );
+    let iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+    ok(!isDefunct(iframeDocAcc), "IFRAME document should be accessible");
+
+    info("Move the IFRAME under a new hidden root.");
+    let onEvents = waitForEvent(EVENT_REORDER, contentDocAcc);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], id => {
+      const doc = content.document;
+      const root = doc.createElement("div");
+      root.style.display = "none";
+      doc.body.appendChild(root);
+      root.appendChild(doc.getElementById(id));
+    });
+    await onEvents;
+
+    ok(
+      isDefunct(iframeAcc),
+      "IFRAME accessible should be defunct when hidden."
+    );
+    ok(
+      isDefunct(iframeDocAcc),
+      "IFRAME document's accessible should be defunct when the IFRAME is hidden."
+    );
+    ok(
+      !findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID),
+      "No accessible for an IFRAME present."
+    );
+    ok(
+      !findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_DOC_BODY_ID),
+      "No accessible for the IFRAME document present."
+    );
+
+    info("Move the IFRAME back under the content document's body.");
+    onEvents = waitForEvents([
+      [EVENT_REORDER, contentDocAcc],
+      [
+        EVENT_STATE_CHANGE,
+        event => {
+          const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+          const id = getAccessibleDOMNodeID(event.accessible);
+          return (
+            id === DEFAULT_IFRAME_DOC_BODY_ID &&
+            scEvent.state === STATE_BUSY &&
+            scEvent.isEnabled === false
+          );
+        },
+      ],
+    ]);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], id => {
+      content.document.body.appendChild(content.document.getElementById(id));
+    });
+    await onEvents;
+
+    iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    const newiframeDocAcc = iframeAcc.firstChild;
+
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+    is(iframeAcc.childCount, 1, "IFRAME accessible should have a single child");
+    ok(!isDefunct(newiframeDocAcc), "IFRAME document should be accessible");
+    ok(
+      isDefunct(iframeDocAcc),
+      "Original IFRAME document accessible should be defunct."
+    );
+    isnot(
+      iframeAcc.firstChild,
+      iframeDocAcc,
+      "A new accessible is created for a IFRAME document."
+    );
+    is(
+      iframeAcc.firstChild,
+      newiframeDocAcc,
+      "A new accessible for a IFRAME document is the child of the IFRAME accessible"
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/browser_reframe_visibility.js b/accessible/tests/browser/fission/browser_reframe_visibility.js
new file mode 100644
index 0000000000..bddb651f91
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_reframe_visibility.js
@@ -0,0 +1,116 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "states.js", dir: MOCHITESTS_DIR });
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    info(
+      "Check that the IFRAME and the IFRAME document are accessible initially."
+    );
+    let iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+    ok(!isDefunct(iframeDocAcc), "IFRAME document should be accessible");
+
+    info(
+      "Hide the IFRAME and check that it's gone along with the IFRAME document."
+    );
+    let onEvents = waitForEvent(EVENT_REORDER, contentDocAcc);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], contentId => {
+      content.document.getElementById(contentId).style.display = "none";
+    });
+    await onEvents;
+
+    ok(
+      isDefunct(iframeAcc),
+      "IFRAME accessible should be defunct when hidden."
+    );
+    if (gIsRemoteIframe) {
+      ok(
+        !isDefunct(iframeDocAcc),
+        "IFRAME document's accessible is not defunct when the IFRAME is hidden and fission is enabled."
+      );
+    } else {
+      ok(
+        isDefunct(iframeDocAcc),
+        "IFRAME document's accessible is defunct when the IFRAME is hidden and fission is not enabled."
+      );
+    }
+    ok(
+      !findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID),
+      "No accessible for an IFRAME present."
+    );
+    ok(
+      !findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_DOC_BODY_ID),
+      "No accessible for the IFRAME document present."
+    );
+
+    info(
+      "Show the IFRAME and check that a new accessible is created for it as " +
+        "well as the IFRAME document."
+    );
+
+    const events = [[EVENT_REORDER, contentDocAcc]];
+    if (!gIsRemoteIframe) {
+      events.push([
+        EVENT_STATE_CHANGE,
+        event => {
+          const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+          const id = getAccessibleDOMNodeID(event.accessible);
+          return (
+            id === DEFAULT_IFRAME_DOC_BODY_ID &&
+            scEvent.state === STATE_BUSY &&
+            scEvent.isEnabled === false
+          );
+        },
+      ]);
+    }
+    onEvents = waitForEvents(events);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], contentId => {
+      content.document.getElementById(contentId).style.display = "block";
+    });
+    await onEvents;
+
+    iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    const newiframeDocAcc = iframeAcc.firstChild;
+
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+    is(iframeAcc.childCount, 1, "IFRAME accessible should have a single child");
+    ok(newiframeDocAcc, "IFRAME document exists");
+    ok(!isDefunct(newiframeDocAcc), "IFRAME document should be accessible");
+    if (gIsRemoteIframe) {
+      ok(
+        !isDefunct(iframeDocAcc),
+        "Original IFRAME document accessible should not be defunct when fission is enabled."
+      );
+      is(
+        iframeAcc.firstChild,
+        iframeDocAcc,
+        "Existing accessible is used for a IFRAME document."
+      );
+    } else {
+      ok(
+        isDefunct(iframeDocAcc),
+        "Original IFRAME document accessible should be defunct when fission is not enabled."
+      );
+      isnot(
+        iframeAcc.firstChild,
+        iframeDocAcc,
+        "A new accessible is created for a IFRAME document."
+      );
+    }
+    is(
+      iframeAcc.firstChild,
+      newiframeDocAcc,
+      "A new accessible for a IFRAME document is the child of the IFRAME accessible"
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/browser_src_change.js b/accessible/tests/browser/fission/browser_src_change.js
new file mode 100644
index 0000000000..c490468b15
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_src_change.js
@@ -0,0 +1,61 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    info(
+      "Check that the IFRAME and the IFRAME document are accessible initially."
+    );
+    let iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    ok(isAccessible(iframeAcc), "IFRAME should be accessible");
+    ok(isAccessible(iframeDocAcc), "IFRAME document should be accessible");
+
+    info("Replace src URL for the IFRAME with one with different origin.");
+    const onDocLoad = waitForEvent(
+      EVENT_DOCUMENT_LOAD_COMPLETE,
+      DEFAULT_IFRAME_DOC_BODY_ID
+    );
+
+    await SpecialPowers.spawn(
+      browser,
+      [DEFAULT_IFRAME_ID, CURRENT_CONTENT_DIR],
+      (id, olddir) => {
+        const { src } = content.document.getElementById(id);
+        content.document.getElementById(id).src = src.replace(
+          olddir,
+          "http://example.net/browser/accessible/tests/browser/"
+        );
+      }
+    );
+    const newiframeDocAcc = (await onDocLoad).accessible;
+
+    ok(isAccessible(iframeAcc), "IFRAME should be accessible");
+    ok(
+      isAccessible(newiframeDocAcc),
+      "new IFRAME document should be accessible"
+    );
+    isnot(
+      iframeDocAcc,
+      newiframeDocAcc,
+      "A new accessible is created for a IFRAME document."
+    );
+    is(
+      iframeAcc.firstChild,
+      newiframeDocAcc,
+      "An IFRAME has a new accessible for a IFRAME document as a child."
+    );
+    is(
+      newiframeDocAcc.parent,
+      iframeAcc,
+      "A new accessible for a IFRAME document has an IFRAME as a parent."
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/browser_take_focus.js b/accessible/tests/browser/fission/browser_take_focus.js
new file mode 100644
index 0000000000..6e6eba662e
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_take_focus.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function(browser, iframeDocAcc, contentDocAcc) {
+    const textbox = findAccessibleChildByID(iframeDocAcc, "textbox");
+    testStates(textbox, STATE_FOCUSABLE, 0, STATE_FOCUSED);
+
+    let onFocus = waitForEvent(EVENT_FOCUS, textbox);
+    textbox.takeFocus();
+    await onFocus;
+
+    testStates(textbox, STATE_FOCUSABLE | STATE_FOCUSED, 0);
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/fission/head.js b/accessible/tests/browser/fission/head.js
new file mode 100644
index 0000000000..672aa46171
--- /dev/null
+++ b/accessible/tests/browser/fission/head.js
@@ -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/. */
+
+"use strict";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
diff --git a/accessible/tests/browser/general/browser.ini b/accessible/tests/browser/general/browser.ini
new file mode 100644
index 0000000000..93ff094995
--- /dev/null
+++ b/accessible/tests/browser/general/browser.ini
@@ -0,0 +1,9 @@
+[DEFAULT]
+support-files =
+  !/accessible/tests/browser/shared-head.js
+  head.js
+  !/accessible/tests/mochitest/*.js
+skip-if = a11y_checks || (os == 'win' && processor == 'aarch64') # windows-aarch64, 1534811
+
+[browser_test_doc_creation.js]
+[browser_test_urlbar.js]
diff --git a/accessible/tests/browser/general/browser_test_doc_creation.js b/accessible/tests/browser/general/browser_test_doc_creation.js
new file mode 100644
index 0000000000..7ee07f63fd
--- /dev/null
+++ b/accessible/tests/browser/general/browser_test_doc_creation.js
@@ -0,0 +1,55 @@
+/* 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 tab1URL = `data:text/html,
+  <html xmlns="http://www.w3.org/1999/xhtml">
+    <head>
+      <meta charset="utf-8"/>
+      <title>First tab to be loaded</title>
+    </head>
+    <body>
+      <butotn>JUST A BUTTON</butotn>
+    </body>
+  </html>`;
+
+const tab2URL = `data:text/html,
+  <html xmlns="http://www.w3.org/1999/xhtml">
+    <head>
+      <meta charset="utf-8"/>
+      <title>Second tab to be loaded</title>
+    </head>
+    <body>
+      <butotn>JUST A BUTTON</butotn>
+    </body>
+  </html>`;
+
+// Checking that, if there are open windows before accessibility was started,
+// root accessibles for open windows are created so that all root accessibles
+// are stored in application accessible children array.
+add_task(async function testDocumentCreation() {
+  let tab1 = await openNewTab(tab1URL);
+  let tab2 = await openNewTab(tab2URL);
+  let accService = await initAccessibilityService();
+
+  info("Verifying that each tab content document is in accessible cache.");
+  for (const browser of [...gBrowser.browsers]) {
+    await SpecialPowers.spawn(browser, [], async () => {
+      let accServiceContent = Cc[
+        "@mozilla.org/accessibilityService;1"
+      ].getService(Ci.nsIAccessibilityService);
+      Assert.ok(
+        !!accServiceContent.getAccessibleFromCache(content.document),
+        "Document accessible is in cache."
+      );
+    });
+  }
+
+  BrowserTestUtils.removeTab(tab1);
+  BrowserTestUtils.removeTab(tab2);
+
+  accService = null; // eslint-disable-line no-unused-vars
+  await shutdownAccessibilityService();
+});
diff --git a/accessible/tests/browser/general/browser_test_urlbar.js b/accessible/tests/browser/general/browser_test_urlbar.js
new file mode 100644
index 0000000000..8c0c7797b5
--- /dev/null
+++ b/accessible/tests/browser/general/browser_test_urlbar.js
@@ -0,0 +1,40 @@
+/* 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 { UrlbarTestUtils } = ChromeUtils.import(
+  "resource://testing-common/UrlbarTestUtils.jsm"
+);
+
+// Checking that the awesomebar popup gets COMBOBOX_LIST role instead of
+// LISTBOX, since its parent is a <panel> (see Bug 1422465)
+add_task(async function testAutocompleteRichResult() {
+  let tab = await openNewTab("data:text/html;charset=utf-8,");
+  let accService = await initAccessibilityService();
+
+  info("Opening the URL bar and entering a key to show the urlbar panel");
+  await UrlbarTestUtils.promiseAutocompleteResultPopup({
+    window,
+    waitForFocus,
+    value: "a",
+  });
+
+  info("Waiting for accessibility to be created for the results list");
+  let resultsView;
+  resultsView = gURLBar.view.panel.querySelector(".urlbarView-results");
+  await TestUtils.waitForCondition(() =>
+    accService.getAccessibleFor(resultsView)
+  );
+
+  info("Confirming that the special case is handled in XULListboxAccessible");
+  let accessible = accService.getAccessibleFor(resultsView);
+  is(accessible.role, ROLE_COMBOBOX_LIST, "Right role");
+
+  BrowserTestUtils.removeTab(tab);
+});
+
+registerCleanupFunction(async function() {
+  await shutdownAccessibilityService();
+});
diff --git a/accessible/tests/browser/general/head.js b/accessible/tests/browser/general/head.js
new file mode 100644
index 0000000000..cd03a441f3
--- /dev/null
+++ b/accessible/tests/browser/general/head.js
@@ -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/. */
+
+"use strict";
+
+/* exported initAccessibilityService, openNewTab, shutdownAccessibilityService */
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+const nsIAccessibleRole = Ci.nsIAccessibleRole; // eslint-disable-line no-unused-vars
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+async function openNewTab(url) {
+  const forceNewProcess = true;
+
+  return BrowserTestUtils.openNewForegroundTab({
+    gBrowser,
+    url,
+    forceNewProcess,
+  });
+}
+
+async function initAccessibilityService() {
+  info("Create accessibility service.");
+  let accService = Cc["@mozilla.org/accessibilityService;1"].getService(
+    Ci.nsIAccessibilityService
+  );
+
+  await new Promise(resolve => {
+    if (Services.appinfo.accessibilityEnabled) {
+      resolve();
+      return;
+    }
+
+    let observe = (subject, topic, data) => {
+      if (data === "1") {
+        Services.obs.removeObserver(observe, "a11y-init-or-shutdown");
+        resolve();
+      }
+    };
+    Services.obs.addObserver(observe, "a11y-init-or-shutdown");
+  });
+
+  return accService;
+}
+
+function shutdownAccessibilityService() {
+  forceGC();
+
+  return new Promise(resolve => {
+    if (!Services.appinfo.accessibilityEnabled) {
+      resolve();
+      return;
+    }
+
+    let observe = (subject, topic, data) => {
+      if (data === "0") {
+        Services.obs.removeObserver(observe, "a11y-init-or-shutdown");
+        resolve();
+      }
+    };
+    Services.obs.addObserver(observe, "a11y-init-or-shutdown");
+  });
+}
diff --git a/accessible/tests/browser/head.js b/accessible/tests/browser/head.js
new file mode 100644
index 0000000000..915d502905
--- /dev/null
+++ b/accessible/tests/browser/head.js
@@ -0,0 +1,147 @@
+/* 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";
+
+/* exported initAccService, shutdownAccService, waitForEvent, setE10sPrefs,
+            unsetE10sPrefs, accConsumersChanged */
+
+// Load the shared-head file first.
+/* import-globals-from shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+const { CommonUtils } = ChromeUtils.import(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+);
+
+/**
+ * Set e10s related preferences in the test environment.
+ * @return {Promise} promise that resolves when preferences are set.
+ */
+function setE10sPrefs() {
+  return new Promise(resolve =>
+    SpecialPowers.pushPrefEnv(
+      {
+        set: [["browser.tabs.remote.autostart", true]],
+      },
+      resolve
+    )
+  );
+}
+
+/**
+ * Unset e10s related preferences in the test environment.
+ * @return {Promise} promise that resolves when preferences are unset.
+ */
+function unsetE10sPrefs() {
+  return new Promise(resolve => {
+    SpecialPowers.popPrefEnv(resolve);
+  });
+}
+
+/**
+ * Capture when 'a11y-consumers-changed' event is fired.
+ *
+ * @param  {?Object} target
+ *         [optional] browser object that indicates that accessibility service
+ *         is in content process.
+ * @return {Array}
+ *         List of promises where first one is the promise for when the event
+ *         observer is added and the second one for when the event is observed.
+ */
+function accConsumersChanged(target) {
+  return target
+    ? [
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.addAccConsumersChangedObserver()
+        ),
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.observeAccConsumersChanged()
+        ),
+      ]
+    : [
+        CommonUtils.addAccConsumersChangedObserver(),
+        CommonUtils.observeAccConsumersChanged(),
+      ];
+}
+
+/**
+ * Capture when accessibility service is initialized.
+ *
+ * @param  {?Object} target
+ *         [optional] browser object that indicates that accessibility service
+ *         is expected to be initialized in content process.
+ * @return {Array}
+ *         List of promises where first one is the promise for when the event
+ *         observer is added and the second one for when the event is observed.
+ */
+function initAccService(target) {
+  return target
+    ? [
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.addAccServiceInitializedObserver()
+        ),
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.observeAccServiceInitialized()
+        ),
+      ]
+    : [
+        CommonUtils.addAccServiceInitializedObserver(),
+        CommonUtils.observeAccServiceInitialized(),
+      ];
+}
+
+/**
+ * Capture when accessibility service is shutdown.
+ *
+ * @param  {?Object} target
+ *         [optional] browser object that indicates that accessibility service
+ *         is expected to be shutdown in content process.
+ * @return {Array}
+ *         List of promises where first one is the promise for when the event
+ *         observer is added and the second one for when the event is observed.
+ */
+function shutdownAccService(target) {
+  return target
+    ? [
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.addAccServiceShutdownObserver()
+        ),
+        SpecialPowers.spawn(target, [], () =>
+          content.CommonUtils.observeAccServiceShutdown()
+        ),
+      ]
+    : [
+        CommonUtils.addAccServiceShutdownObserver(),
+        CommonUtils.observeAccServiceShutdown(),
+      ];
+}
+
+/**
+ * Simpler verions of waitForEvent defined in
+ * accessible/tests/browser/events.js
+ */
+function waitForEvent(eventType, expectedId) {
+  return new Promise(resolve => {
+    let eventObserver = {
+      observe(subject) {
+        let event = subject.QueryInterface(Ci.nsIAccessibleEvent);
+        let id;
+        try {
+          id = event.accessible.id;
+        } catch (e) {
+          // This can throw NS_ERROR_FAILURE.
+        }
+        if (event.eventType === eventType && id === expectedId) {
+          Services.obs.removeObserver(this, "accessible-event");
+          resolve(event);
+        }
+      },
+    };
+    Services.obs.addObserver(eventObserver, "accessible-event");
+  });
+}
diff --git a/accessible/tests/browser/hittest/browser.ini b/accessible/tests/browser/hittest/browser.ini
new file mode 100644
index 0000000000..6b293b24bf
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser.ini
@@ -0,0 +1,15 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+
+[browser_test_browser.js]
+[browser_test_canvas_hitregion.js]
+skip-if = os == "android"
+[browser_test_general.js]
+[browser_test_shadowroot.js]
+[browser_test_zoom_text.js]
+[browser_test_zoom.js]
diff --git a/accessible/tests/browser/hittest/browser_test_browser.js b/accessible/tests/browser/hittest/browser_test_browser.js
new file mode 100644
index 0000000000..477af42fe9
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_browser.js
@@ -0,0 +1,68 @@
+/* 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";
+
+async function runTests(browser, accDoc) {
+  // Hit testing. See bug #726097
+  await invokeContentTask(browser, [], () =>
+    content.document.getElementById("hittest").scrollIntoView(true)
+  );
+
+  const dpr = await getContentDPR(browser);
+  const hititem = findAccessibleChildByID(accDoc, "hititem");
+  const hittest = findAccessibleChildByID(accDoc, "hittest");
+  const outerDocAcc = accDoc.parent;
+  const rootAcc = CommonUtils.getRootAccessible(document);
+
+  const [hitX, hitY, hitWidth, hitHeight] = Layout.getBounds(hititem, dpr);
+  // "hititem" node has the full screen width, so when we divide it by 2, we are
+  // still way outside the inline content.
+  const tgtX = hitX + hitWidth / 2;
+  const tgtY = hitY + hitHeight / 2;
+
+  let hitAcc = rootAcc.getDeepestChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hititem,
+    `Hit match at ${tgtX},${tgtY} (root doc deepest child). Found: ${prettyName(
+      hitAcc
+    )}`
+  );
+
+  const hitAcc2 = accDoc.getDeepestChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hitAcc2,
+    `Hit match at ${tgtX},${tgtY} (doc deepest child). Found: ${prettyName(
+      hitAcc2
+    )}`
+  );
+
+  hitAcc = outerDocAcc.getChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    accDoc,
+    `Hit match at ${tgtX},${tgtY} (outer doc child). Found: ${prettyName(
+      hitAcc
+    )}`
+  );
+
+  hitAcc = accDoc.getChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hittest,
+    `Hit match at ${tgtX},${tgtY} (doc child). Found: ${prettyName(hitAcc)}`
+  );
+}
+
+addAccessibleTask(
+  `
+  <div id="hittest">
+    <div id="hititem"><span role="img">img</span>item</div>
+  </div>
+ `,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_canvas_hitregion.js b/accessible/tests/browser/hittest/browser_test_canvas_hitregion.js
new file mode 100644
index 0000000000..dbd326f593
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_canvas_hitregion.js
@@ -0,0 +1,92 @@
+/* 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";
+
+function convertCSSToDevicePixels(browser, ...bounds) {
+  return invokeContentTask(browser, bounds, (x, y, width, height) => {
+    const { Layout: LayoutUtils } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+
+    return LayoutUtils.CSSToDevicePixels(content, x, y, width, height);
+  });
+}
+
+async function runTests(browser, accDoc) {
+  Services.prefs.setBoolPref("canvas.hitregions.enabled", true);
+
+  const offsetX = 20;
+  const offsetY = 40;
+  await invokeContentTask(browser, [], () =>
+    content.document.getElementById("hitcanvas").scrollIntoView(true)
+  );
+  const dpr = await getContentDPR(browser);
+
+  await invokeContentTask(browser, [offsetX, offsetY], (x, y) => {
+    const doc = content.document;
+    const element = doc.getElementById("hitcheck");
+    const context = doc.getElementById("hitcanvas").getContext("2d");
+    context.save();
+    context.font = "10px sans-serif";
+    context.textAlign = "left";
+    context.textBaseline = "middle";
+    const metrics = context.measureText(element.parentNode.textContent);
+    context.beginPath();
+    context.strokeStyle = "black";
+    context.rect(x - 5, y - 5, 10, 10);
+    context.stroke();
+    if (element.checked) {
+      context.fillStyle = "black";
+      context.fill();
+    }
+
+    context.fillText(element.parentNode.textContent, x + 5, y);
+    context.beginPath();
+    context.rect(x - 7, y - 7, 12 + metrics.width + 2, 14);
+
+    if (doc.activeElement == element) {
+      context.drawFocusIfNeeded(element);
+    }
+
+    context.addHitRegion({ control: element });
+    context.restore();
+  });
+
+  const hitcanvas = findAccessibleChildByID(accDoc, "hitcanvas");
+  const hitcheck = findAccessibleChildByID(accDoc, "hitcheck");
+  const [hitX, hitY /* hitWidth, hitHeight */] = Layout.getBounds(
+    hitcanvas,
+    dpr
+  );
+  const [deltaX, deltaY] = await convertCSSToDevicePixels(
+    browser,
+    offsetX,
+    offsetY
+  );
+
+  info("Test if we hit the region associated with the shadow dom checkbox.");
+  const tgtX = hitX + deltaX;
+  let tgtY = hitY + deltaY;
+  let hitAcc = accDoc.getDeepestChildAtPoint(tgtX, tgtY);
+  CommonUtils.isObject(hitAcc, hitcheck, `Hit match at (${tgtX}, ${tgtY}`);
+
+  info(
+    "Test that we don't hit the region associated with the shadow dom checkbox."
+  );
+  tgtY = hitY + deltaY * 2;
+  hitAcc = accDoc.getDeepestChildAtPoint(tgtX, tgtY);
+  CommonUtils.isObject(hitAcc, hitcanvas, `Hit match at (${tgtX}, ${tgtY}`);
+
+  Services.prefs.clearUserPref("canvas.hitregions.enabled");
+}
+
+addAccessibleTask(
+  `
+  <canvas id="hitcanvas">
+    <input id="hitcheck" type="checkbox"><label for="showA"> Show A </label>
+  </canvas>`,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_general.js b/accessible/tests/browser/hittest/browser_test_general.js
new file mode 100644
index 0000000000..08596529ee
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_general.js
@@ -0,0 +1,123 @@
+/* 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";
+
+async function runTests(browser, accDoc) {
+  await waitForImageMap(browser, accDoc);
+  const dpr = await getContentDPR(browser);
+
+  info("Not specific case, child and deepchild testing.");
+  testChildAtPoint(
+    dpr,
+    3,
+    3,
+    findAccessibleChildByID(accDoc, "list"),
+    findAccessibleChildByID(accDoc, "listitem"),
+    findAccessibleChildByID(accDoc, "inner").firstChild
+  );
+  todo(
+    false,
+    "Bug 746974 - children must match on all platforms. On Windows, " +
+      "ChildAtPoint with eDeepestChild is incorrectly ignoring MustPrune " +
+      "for the graphic."
+  );
+
+  info(
+    "::MustPrune case (in this case childAtPoint doesn't look inside a " +
+      "textbox), point is inside of textbox."
+  );
+  const txt = findAccessibleChildByID(accDoc, "txt");
+  testChildAtPoint(dpr, 1, 1, txt, txt, txt);
+
+  info(
+    "::MustPrune case, point is outside of textbox accessible but is in document."
+  );
+  testChildAtPoint(dpr, -1, -1, txt, null, null);
+
+  info("::MustPrune case, point is outside of root accessible.");
+  testChildAtPoint(dpr, -10000, -10000, txt, null, null);
+
+  info("Not specific case, point is inside of btn accessible.");
+  const btn = findAccessibleChildByID(accDoc, "btn");
+  testChildAtPoint(dpr, 1, 1, btn, btn, btn);
+
+  info("Not specific case, point is outside of btn accessible.");
+  testChildAtPoint(dpr, -1, -1, btn, null, null);
+
+  info(
+    "Out of flow accessible testing, do not return out of flow accessible " +
+      "because it's not a child of the accessible even though visually it is."
+  );
+  await invokeContentTask(browser, [], () => {
+    const { CommonUtils } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+    );
+
+    const doc = content.document;
+    const rectArea = CommonUtils.getNode("area", doc).getBoundingClientRect();
+    const outOfFlow = CommonUtils.getNode("outofflow", doc);
+    outOfFlow.style.left = rectArea.left + "px";
+    outOfFlow.style.top = rectArea.top + "px";
+  });
+
+  const area = findAccessibleChildByID(accDoc, "area");
+  testChildAtPoint(dpr, 1, 1, area, area, area);
+
+  info("Test image maps. Their children are not in the layout tree.");
+  const imgmap = findAccessibleChildByID(accDoc, "imgmap");
+  const theLetterA = imgmap.firstChild;
+  await hitTest(browser, imgmap, theLetterA, theLetterA);
+  await hitTest(
+    browser,
+    findAccessibleChildByID(accDoc, "container"),
+    imgmap,
+    theLetterA
+  );
+
+  info("hit testing for element contained by zero-width element");
+  const container2Input = findAccessibleChildByID(accDoc, "container2_input");
+  await hitTest(
+    browser,
+    findAccessibleChildByID(accDoc, "container2"),
+    container2Input,
+    container2Input
+  );
+}
+
+addAccessibleTask(
+  `
+  <div role="list" id="list">
+    <div role="listitem" id="listitem"><span title="foo" id="inner">inner</span>item</div>
+  </div>
+
+  <span role="button">button1</span><span role="button" id="btn">button2</span>
+
+  <span role="textbox">textbox1</span><span role="textbox" id="txt">textbox2</span>
+
+  <div id="outofflow" style="width: 10px; height: 10px; position: absolute; left: 0px; top: 0px; background-color: yellow;">
+  </div>
+  <div id="area" style="width: 100px; height: 100px; background-color: blue;"></div>
+
+  <map name="atoz_map">
+    <area id="thelettera" href="http://www.bbc.co.uk/radio4/atoz/index.shtml#a"
+          coords="0,0,15,15" alt="thelettera" shape="rect"/>
+  </map>
+
+  <div id="container">
+    <img id="imgmap" width="447" height="15" usemap="#atoz_map" src="http://example.com/a11y/accessible/tests/mochitest/letters.gif"/>
+  </div>
+
+  <div id="container2" style="width: 0px">
+    <input id="container2_input">
+  </div>
+  `,
+  runTests,
+  {
+    iframe: true,
+    remoteIframe: true,
+    // Ensure that all hittest elements are in view.
+    iframeAttrs: { style: "width: 600px; height: 600px;" },
+  }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_shadowroot.js b/accessible/tests/browser/hittest/browser_test_shadowroot.js
new file mode 100644
index 0000000000..cb499a4fd9
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_shadowroot.js
@@ -0,0 +1,61 @@
+/* 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";
+
+async function runTests(browser, accDoc) {
+  const dpr = await getContentDPR(browser);
+  let componentAcc = findAccessibleChildByID(accDoc, "component1");
+  testChildAtPoint(
+    dpr,
+    1,
+    1,
+    componentAcc,
+    componentAcc.firstChild,
+    componentAcc.firstChild
+  );
+
+  componentAcc = findAccessibleChildByID(accDoc, "component2");
+  testChildAtPoint(
+    dpr,
+    1,
+    1,
+    componentAcc,
+    componentAcc.firstChild,
+    componentAcc.firstChild
+  );
+}
+
+addAccessibleTask(
+  `
+  <div role="group" class="components" id="component1" style="display: inline-block;">
+  <!--
+    <div role="button" id="component-child"
+         style="width: 100px; height: 100px; background-color: pink;">
+    </div>
+  -->
+  </div>
+  <div role="group" class="components"  id="component2" style="display: inline-block;">
+  <!--
+    <button>Hello world</button>
+  -->
+  </div>
+  <script>
+    // This routine adds the comment children of each 'component' to its
+    // shadow root.
+    var components = document.querySelectorAll(".components");
+    for (var i = 0; i < components.length; i++) {
+      var component = components[i];
+      var shadow = component.attachShadow({mode: "open"});
+      for (var child = component.firstChild; child; child = child.nextSibling) {
+        if (child.nodeType === 8)
+          // eslint-disable-next-line no-unsanitized/property
+          shadow.innerHTML = child.data;
+      }
+    }
+  </script>
+  `,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_zoom.js b/accessible/tests/browser/hittest/browser_test_zoom.js
new file mode 100644
index 0000000000..2ea330fb74
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_zoom.js
@@ -0,0 +1,38 @@
+/* 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";
+
+async function runTests(browser, accDoc) {
+  if (Services.appinfo.OS !== "Darwin") {
+    const p1 = findAccessibleChildByID(accDoc, "p1");
+    const p2 = findAccessibleChildByID(accDoc, "p2");
+    await hitTest(browser, accDoc, p1, p1.firstChild);
+    await hitTest(browser, accDoc, p2, p2.firstChild);
+
+    await invokeContentTask(browser, [], () => {
+      const { Layout } = ChromeUtils.import(
+        "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+      );
+
+      Layout.zoomDocument(content.document, 2.0);
+      content.document.body.offsetTop; // getBounds doesn't flush layout on its own.
+    });
+
+    await hitTest(browser, accDoc, p1, p1.firstChild);
+    await hitTest(browser, accDoc, p2, p2.firstChild);
+  } else {
+    todo(
+      false,
+      "Bug 746974 - deepest child must be correct on all platforms, disabling on Mac!"
+    );
+  }
+}
+
+addAccessibleTask(`<p id="p1">para 1</p><p id="p2">para 2</p>`, runTests, {
+  iframe: true,
+  remoteIframe: true,
+  // Ensure that all hittest elements are in view.
+  iframeAttrs: { style: "left: 100px; top: 100px;" },
+});
diff --git a/accessible/tests/browser/hittest/browser_test_zoom_text.js b/accessible/tests/browser/hittest/browser_test_zoom_text.js
new file mode 100644
index 0000000000..0d7eb336ca
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_zoom_text.js
@@ -0,0 +1,76 @@
+/* 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";
+
+/**
+ * Test if getOffsetAtPoint returns the given text offset at given coordinates.
+ */
+function testOffsetAtPoint(hyperText, x, y, coordType, expectedOffset) {
+  is(
+    hyperText.getOffsetAtPoint(x, y, coordType),
+    expectedOffset,
+    `Wrong offset at given point (${x}, ${y}) for ${prettyName(hyperText)}`
+  );
+}
+
+async function runTests(browser, accDoc) {
+  const expectedLength = await invokeContentTask(browser, [], () => {
+    const { CommonUtils } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+    );
+    const hyperText = CommonUtils.getNode("paragraph", content.document);
+
+    return hyperText.textContent.length / 2;
+  });
+  const hyperText = findAccessibleChildByID(accDoc, "paragraph", [
+    Ci.nsIAccessibleText,
+  ]);
+  const textNode = hyperText.firstChild;
+
+  let [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+
+    Layout.zoomDocument(content.document, 2.0);
+    content.document.body.offsetTop; // getBounds doesn't flush layout on its own.
+  });
+
+  [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+}
+
+addAccessibleTask(
+  `<p id="paragraph" style="font-family: monospace;">Болтали две сороки</p>`,
+  runTests,
+  {
+    iframe: true,
+    remoteIframe: true,
+    iframeAttrs: { style: "width: 600px; height: 600px;" },
+  }
+);
diff --git a/accessible/tests/browser/hittest/head.js b/accessible/tests/browser/hittest/head.js
new file mode 100644
index 0000000000..f06467da7c
--- /dev/null
+++ b/accessible/tests/browser/hittest/head.js
@@ -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/. */
+
+"use strict";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+
+/* exported CommonUtils, testChildAtPoint, Layout, hitTest */
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+const { CommonUtils } = ChromeUtils.import(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
+);
+
+const { Layout } = ChromeUtils.import(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+);
+
+function getChildAtPoint(container, x, y, findDeepestChild) {
+  try {
+    return findDeepestChild
+      ? container.getDeepestChildAtPoint(x, y)
+      : container.getChildAtPoint(x, y);
+  } catch (e) {
+    // Failed to get child at point.
+  }
+
+  return null;
+}
+
+function testChildAtPoint(dpr, x, y, container, child, grandChild) {
+  const [containerX, containerY] = Layout.getBounds(container, dpr);
+  x += containerX;
+  y += containerY;
+
+  CommonUtils.isObject(
+    getChildAtPoint(container, x, y, false),
+    child,
+    `Wrong direct child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}`
+  );
+
+  CommonUtils.isObject(
+    getChildAtPoint(container, x, y, true),
+    grandChild,
+    `Wrong deepest child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}`
+  );
+}
+
+/**
+ * Test if getChildAtPoint returns the given child and grand child accessibles
+ * at coordinates of child accessible (direct and deep hit test).
+ */
+async function hitTest(browser, container, child, grandChild) {
+  const [childX, childY] = await getContentBoundsForDOMElm(
+    browser,
+    getAccessibleDOMNodeID(child)
+  );
+  const x = childX + 1;
+  const y = childY + 1;
+
+  CommonUtils.isObject(
+    getChildAtPoint(container, x, y, false),
+    child,
+    `Wrong direct child of ${prettyName(container)}`
+  );
+
+  CommonUtils.isObject(
+    getChildAtPoint(container, x, y, true),
+    grandChild,
+    `Wrong deepest child of ${prettyName(container)}`
+  );
+}
diff --git a/accessible/tests/browser/mac/browser.ini b/accessible/tests/browser/mac/browser.ini
new file mode 100644
index 0000000000..ddcfe0e081
--- /dev/null
+++ b/accessible/tests/browser/mac/browser.ini
@@ -0,0 +1,50 @@
+[DEFAULT]
+skip-if = os != 'mac'
+support-files =
+  head.js
+  doc_aria_tabs.html
+  doc_textmarker_test.html
+  doc_rich_listbox.xhtml
+  doc_menulist.xhtml
+  doc_tree.xhtml
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+  !/accessible/tests/mochitest/moz.png
+
+[browser_app.js]
+[browser_aria_current.js]
+[browser_details_summary.js]
+[browser_label_title.js]
+[browser_range.js]
+[browser_roles_elements.js]
+[browser_table.js]
+[browser_selectables.js]
+[browser_radio_position.js]
+[browser_toggle_radio_check.js]
+[browser_link.js]
+[browser_aria_haspopup.js]
+[browser_required.js]
+[browser_popupbutton.js]
+[browser_mathml.js]
+[browser_input.js]
+[browser_focus.js]
+[browser_text_leaf.js]
+[browser_webarea.js]
+skip-if = os == 'mac' && !debug #1648813
+[browser_text_basics.js]
+[browser_text_input.js]
+skip-if = os == 'mac' && debug # Bug 1664577
+[browser_rotor.js]
+[browser_rootgroup.js]
+[browser_text_selection.js]
+[browser_navigate.js]
+[browser_outline.js]
+[browser_outline_xul.js]
+[browser_hierarchy.js]
+[browser_menulist.js]
+[browser_rich_listbox.js]
+[browser_live_regions.js]
+[browser_aria_busy.js]
+[browser_aria_controls_flowto.js]
\ No newline at end of file
diff --git a/accessible/tests/browser/mac/browser_app.js b/accessible/tests/browser/mac/browser_app.js
new file mode 100644
index 0000000000..e57555b556
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_app.js
@@ -0,0 +1,292 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+function getMacAccessible(accOrElmOrID) {
+  return new Promise(resolve => {
+    let intervalId = setInterval(() => {
+      let acc = getAccessible(accOrElmOrID);
+      if (acc) {
+        clearInterval(intervalId);
+        resolve(
+          acc.nativeInterface.QueryInterface(Ci.nsIAccessibleMacInterface)
+        );
+      }
+    }, 10);
+  });
+}
+
+/**
+ * Test browser tabs
+ */
+add_task(async () => {
+  let newTabs = await Promise.all([
+    BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      "data:text/html,<title>Two</title>"
+    ),
+    BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      "data:text/html,<title>Three</title>"
+    ),
+    BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      "data:text/html,<title>Four</title>"
+    ),
+  ]);
+
+  // Mochitests spawn with a tab, and we've opened 3 more for a total of 4 tabs
+  is(gBrowser.tabs.length, 4, "We now have 4 open tabs");
+
+  let tablist = await getMacAccessible("tabbrowser-tabs");
+  is(
+    tablist.getAttributeValue("AXRole"),
+    "AXTabGroup",
+    "Correct role for tablist"
+  );
+
+  let tabMacAccs = tablist.getAttributeValue("AXTabs");
+  is(tabMacAccs.length, 4, "4 items in AXTabs");
+
+  let selectedTabs = tablist.getAttributeValue("AXSelectedChildren");
+  is(selectedTabs.length, 1, "one selected tab");
+
+  let tab = selectedTabs[0];
+  is(tab.getAttributeValue("AXRole"), "AXRadioButton", "Correct role for tab");
+  is(
+    tab.getAttributeValue("AXSubrole"),
+    "AXTabButton",
+    "Correct subrole for tab"
+  );
+  is(tab.getAttributeValue("AXTitle"), "Four", "Correct title for tab");
+
+  let tabToSelect = tabMacAccs[2];
+  is(
+    tabToSelect.getAttributeValue("AXTitle"),
+    "Three",
+    "Correct title for tab"
+  );
+
+  let actions = tabToSelect.actionNames;
+  ok(true, actions);
+  ok(actions.includes("AXPress"), "Has switch action");
+
+  // When tab is clicked selection of tab group changes,
+  // and focus goes to the web area. Wait for both.
+  let evt = Promise.all([
+    waitForMacEvent("AXSelectedChildrenChanged"),
+    waitForMacEvent(
+      "AXFocusedUIElementChanged",
+      iface => iface.getAttributeValue("AXRole") == "AXWebArea"
+    ),
+  ]);
+  tabToSelect.performAction("AXPress");
+  await evt;
+
+  selectedTabs = tablist.getAttributeValue("AXSelectedChildren");
+  is(selectedTabs.length, 1, "one selected tab");
+  is(
+    selectedTabs[0].getAttributeValue("AXTitle"),
+    "Three",
+    "Correct title for tab"
+  );
+
+  // Close all open tabs
+  await Promise.all(newTabs.map(t => BrowserTestUtils.removeTab(t)));
+});
+
+/**
+ * Test ignored invisible items in root
+ */
+add_task(async () => {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:license",
+    },
+    async browser => {
+      let root = await getMacAccessible(document);
+      let rootChildCount = () => root.getAttributeValue("AXChildren").length;
+
+      // With no popups, the root accessible has 5 visible children:
+      // 1. Tab bar (#TabsToolbar)
+      // 2. Navigation bar (#nav-bar)
+      // 3. Content area (#tabbrowser-tabpanels)
+      // 4. Some fullscreen pointer grabber (#fullscreen-and-pointerlock-wrapper)
+      // 5. Accessibility announcements dialog (#a11y-announcement)
+      is(rootChildCount(), 5, "Root with no popups has 5 children");
+
+      // Open a context menu
+      const menu = document.getElementById("contentAreaContextMenu");
+      EventUtils.synthesizeMouseAtCenter(document.body, {
+        type: "contextmenu",
+      });
+      await waitForMacEvent("AXMenuOpened");
+
+      // Now root has 6 children
+      is(rootChildCount(), 6, "Root has 6 children");
+
+      // Close context menu
+      let closed = waitForMacEvent("AXMenuClosed", "contentAreaContextMenu");
+      EventUtils.synthesizeKey("KEY_Escape");
+      await BrowserTestUtils.waitForPopupEvent(menu, "hidden");
+      await closed;
+
+      // We're back to 5
+      is(rootChildCount(), 5, "Root has 5 children");
+
+      // Open site identity popup
+      document.getElementById("identity-box").click();
+      const identityPopup = document.getElementById("identity-popup");
+      await BrowserTestUtils.waitForPopupEvent(identityPopup, "shown");
+
+      // Now root has 6 children
+      is(rootChildCount(), 6, "Root has 6 children");
+
+      // Close popup
+      EventUtils.synthesizeKey("KEY_Escape");
+      await BrowserTestUtils.waitForPopupEvent(identityPopup, "hidden");
+
+      // We're back to 5
+      is(rootChildCount(), 5, "Root has 5 children");
+    }
+  );
+});
+
+/**
+ * Tests for location bar
+ */
+add_task(async () => {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "http://example.com",
+    },
+    async browser => {
+      let input = await getMacAccessible("urlbar-input");
+      is(
+        input.getAttributeValue("AXValue"),
+        "example.com",
+        "Location bar has correct value"
+      );
+    }
+  );
+});
+
+/**
+ * Test context menu
+ */
+add_task(async () => {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url:
+        'data:text/html,<a id="exampleLink" href="https://example.com">link</a>',
+    },
+    async browser => {
+      if (!Services.search.isInitialized) {
+        let aStatus = await Services.search.init();
+        Assert.ok(Components.isSuccessCode(aStatus));
+        Assert.ok(Services.search.isInitialized);
+      }
+
+      const hasContainers =
+        Services.prefs.getBoolPref("privacy.userContext.enabled") &&
+        ContextualIdentityService.getPublicIdentities().length;
+
+      // synthesize a right click on the link to open the link context menu
+      let menu = document.getElementById("contentAreaContextMenu");
+      await BrowserTestUtils.synthesizeMouseAtCenter(
+        "#exampleLink",
+        { type: "contextmenu" },
+        browser
+      );
+      await waitForMacEvent("AXMenuOpened");
+
+      menu = await getMacAccessible(menu);
+      let menuChildren = menu.getAttributeValue("AXChildren");
+      // menu contains 14 items when containers disabled, 15 items otherwise
+      const expectedChildCount = hasContainers ? 15 : 14;
+      is(
+        menuChildren.length,
+        expectedChildCount,
+        "Context menu on link contains 14 or 15 items depending on release"
+      );
+      // items at indicies 4, 10, and 12 are the splitters when containers exist
+      // everything else should be a menu item, otherwise indicies of splitters are
+      // 3, 9, and 11
+      const splitterIndicies = hasContainers ? [4, 10, 12] : [3, 9, 11];
+      for (let i = 0; i < menuChildren.length; i++) {
+        if (splitterIndicies.includes(i)) {
+          is(
+            menuChildren[i].getAttributeValue("AXRole"),
+            "AXSplitter",
+            "found splitter in menu"
+          );
+        } else {
+          is(
+            menuChildren[i].getAttributeValue("AXRole"),
+            "AXMenuItem",
+            "found menu item in menu"
+          );
+        }
+      }
+
+      // check the containers sub menu in depth if it exists
+      if (hasContainers) {
+        is(
+          menuChildren[1].getAttributeValue("AXVisibleChildren"),
+          null,
+          "Submenu 1 has no visible chldren when hidden"
+        );
+
+        // focus the first submenu
+        EventUtils.synthesizeKey("KEY_ArrowDown");
+        EventUtils.synthesizeKey("KEY_ArrowDown");
+        EventUtils.synthesizeKey("KEY_ArrowRight");
+        await waitForMacEvent("AXMenuOpened");
+
+        // after the submenu is opened, refetch it
+        menu = document.getElementById("contentAreaContextMenu");
+        menu = await getMacAccessible(menu);
+        menuChildren = menu.getAttributeValue("AXChildren");
+
+        // verify submenu-menuitem's attributes
+        is(
+          menuChildren[1].getAttributeValue("AXChildren").length,
+          1,
+          "Submenu 1 has one child when open"
+        );
+        const subMenu = menuChildren[1].getAttributeValue("AXChildren")[0];
+        is(
+          subMenu.getAttributeValue("AXRole"),
+          "AXMenu",
+          "submenu has role of menu"
+        );
+        const subMenuChildren = subMenu.getAttributeValue("AXChildren");
+        is(subMenuChildren.length, 4, "sub menu has 4 children");
+        is(
+          subMenu.getAttributeValue("AXVisibleChildren").length,
+          4,
+          "submenu has 4 visible children"
+        );
+
+        // close context menu
+        EventUtils.synthesizeKey("KEY_Escape");
+        await waitForMacEvent("AXMenuClosed");
+      }
+
+      EventUtils.synthesizeKey("KEY_Escape");
+      await waitForMacEvent("AXMenuClosed");
+    }
+  );
+});
diff --git a/accessible/tests/browser/mac/browser_aria_busy.js b/accessible/tests/browser/mac/browser_aria_busy.js
new file mode 100644
index 0000000000..e75d334e29
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_aria_busy.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test aria-busy
+ */
+addAccessibleTask(
+  `<div id="section" role="group">Hello</div>`,
+  async (browser, accDoc) => {
+    let section = getNativeInterface(accDoc, "section");
+
+    ok(!section.getAttributeValue("AXElementBusy"), "section is not busy");
+
+    let busyChanged = waitForMacEvent("AXElementBusyChanged", "section");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("section")
+        .setAttribute("aria-busy", "true");
+    });
+    await busyChanged;
+
+    ok(section.getAttributeValue("AXElementBusy"), "section is busy");
+
+    busyChanged = waitForMacEvent("AXElementBusyChanged", "section");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("section")
+        .setAttribute("aria-busy", "false");
+    });
+    await busyChanged;
+
+    ok(!section.getAttributeValue("AXElementBusy"), "section is not busy");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_aria_controls_flowto.js b/accessible/tests/browser/mac/browser_aria_controls_flowto.js
new file mode 100644
index 0000000000..c1b75b8318
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_aria_controls_flowto.js
@@ -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/. */
+
+"use strict";
+
+/**
+ * Test aria-controls
+ */
+addAccessibleTask(
+  `<button aria-controls="info" id="info-button">Show info</button>
+   <div id="info">Information.</div>
+   <div id="more-info">More information.</div>`,
+  async (browser, accDoc) => {
+    const isARIAControls = (id, expectedIds) =>
+      Assert.deepEqual(
+        getNativeInterface(accDoc, id)
+          .getAttributeValue("AXARIAControls")
+          .map(e => e.getAttributeValue("AXDOMIdentifier")),
+        expectedIds,
+        `"${id}" has correct AXARIAControls`
+      );
+
+    isARIAControls("info-button", ["info"]);
+
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("info-button")
+        .setAttribute("aria-controls", "info more-info");
+    });
+
+    isARIAControls("info-button", ["info", "more-info"]);
+  }
+);
+
+/**
+ * Test aria-flowto
+ */
+addAccessibleTask(
+  `<button aria-flowto="info" id="info-button">Show info</button>
+   <div id="info">Information.</div>
+   <div id="more-info">More information.</div>`,
+  async (browser, accDoc) => {
+    const isLinkedUIElements = (id, expectedIds) =>
+      Assert.deepEqual(
+        getNativeInterface(accDoc, id)
+          .getAttributeValue("AXLinkedUIElements")
+          .map(e => e.getAttributeValue("AXDOMIdentifier")),
+        expectedIds,
+        `"${id}" has correct AXARIAControls`
+      );
+
+    isLinkedUIElements("info-button", ["info"]);
+
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("info-button")
+        .setAttribute("aria-flowto", "info more-info");
+    });
+
+    isLinkedUIElements("info-button", ["info", "more-info"]);
+  }
+);
+
+/**
+ * Test aria-controls
+ */
+addAccessibleTask(
+  `<input type="radio" id="cat-radio" name="animal"><label for="cat">Cat</label>
+   <input type="radio" id="dog-radio" name="animal" aria-flowto="info"><label for="dog">Dog</label>
+   <div id="info">Information.</div>`,
+  async (browser, accDoc) => {
+    const isLinkedUIElements = (id, expectedIds) =>
+      Assert.deepEqual(
+        getNativeInterface(accDoc, id)
+          .getAttributeValue("AXLinkedUIElements")
+          .map(e => e.getAttributeValue("AXDOMIdentifier")),
+        expectedIds,
+        `"${id}" has correct AXARIAControls`
+      );
+
+    isLinkedUIElements("dog-radio", ["cat-radio", "dog-radio", "info"]);
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_aria_current.js b/accessible/tests/browser/mac/browser_aria_current.js
new file mode 100644
index 0000000000..0c5ff08a0a
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_aria_current.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test aria-current
+ */
+addAccessibleTask(
+  `<a id="one" href="%23" aria-current="page">One</a><a id="two" href="%23">Two</a>`,
+  async (browser, accDoc) => {
+    let one = getNativeInterface(accDoc, "one");
+    let two = getNativeInterface(accDoc, "two");
+
+    is(
+      one.getAttributeValue("AXARIACurrent"),
+      "page",
+      "Correct aria-current for #one"
+    );
+    is(
+      two.getAttributeValue("AXARIACurrent"),
+      null,
+      "Correct aria-current for #two"
+    );
+
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "one");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("one")
+        .setAttribute("aria-current", "step");
+    });
+    await stateChanged;
+
+    is(
+      one.getAttributeValue("AXARIACurrent"),
+      "step",
+      "Correct aria-current for #one"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "one");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("one").removeAttribute("aria-current");
+    });
+    await stateChanged;
+
+    is(
+      one.getAttributeValue("AXARIACurrent"),
+      null,
+      "Correct aria-current for #one"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_aria_haspopup.js b/accessible/tests/browser/mac/browser_aria_haspopup.js
new file mode 100644
index 0000000000..36bff246db
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_aria_haspopup.js
@@ -0,0 +1,330 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test aria-haspopup
+ */
+addAccessibleTask(
+  `
+  <button aria-haspopup="false" id="false">action</button>
+
+  <button aria-haspopup="menu" id="menu">action</button>
+
+  <button aria-haspopup="listbox" id="listbox">action</button>
+
+  <button aria-haspopup="tree" id="tree">action</button>
+
+  <button aria-haspopup="grid" id="grid">action</button>
+
+  <button aria-haspopup="dialog" id="dialog">action</button>
+
+  `,
+  async (browser, accDoc) => {
+    // FALSE
+    let falseID = getNativeInterface(accDoc, "false");
+    is(
+      falseID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup val for button with false"
+    );
+    is(
+      falseID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue val for button with false"
+    );
+    let attrChanged = waitForEvent(EVENT_STATE_CHANGE, "false");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("false")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      falseID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for false"
+    );
+    is(
+      falseID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup val for button with true"
+    );
+
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "false");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("false").removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      falseID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for false"
+    );
+    is(
+      falseID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup val for button after remove"
+    );
+
+    // MENU
+    let menuID = getNativeInterface(accDoc, "menu");
+    is(
+      menuID.getAttributeValue("AXPopupValue"),
+      "menu",
+      "Correct AXPopupValue val for button with menu"
+    );
+    is(
+      menuID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup val for button with menu"
+    );
+
+    attrChanged = waitForEvent(EVENT_STATE_CHANGE, "menu");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("menu")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      menuID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for menu"
+    );
+    is(
+      menuID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup val for button with menu"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "menu");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("menu").removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      menuID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for menu"
+    );
+    is(
+      menuID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup val for button after remove"
+    );
+
+    // LISTBOX
+    let listboxID = getNativeInterface(accDoc, "listbox");
+    is(
+      listboxID.getAttributeValue("AXPopupValue"),
+      "listbox",
+      "Correct AXPopupValue for button with listbox"
+    );
+    is(
+      listboxID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with listbox"
+    );
+
+    attrChanged = waitForEvent(EVENT_STATE_CHANGE, "listbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("listbox")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      listboxID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for listbox"
+    );
+    is(
+      listboxID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with listbox"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "listbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("listbox")
+        .removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      listboxID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for listbox"
+    );
+    is(
+      listboxID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup for button with listbox"
+    );
+
+    // TREE
+    let treeID = getNativeInterface(accDoc, "tree");
+    is(
+      treeID.getAttributeValue("AXPopupValue"),
+      "tree",
+      "Correct AXPopupValue for button with tree"
+    );
+    is(
+      treeID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with tree"
+    );
+
+    attrChanged = waitForEvent(EVENT_STATE_CHANGE, "tree");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("tree")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      treeID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for tree"
+    );
+    is(
+      treeID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with tree"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "tree");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("tree").removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      treeID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for tree"
+    );
+    is(
+      treeID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup for button with tree after remove"
+    );
+
+    // GRID
+    let gridID = getNativeInterface(accDoc, "grid");
+    is(
+      gridID.getAttributeValue("AXPopupValue"),
+      "grid",
+      "Correct AXPopupValue for button with grid"
+    );
+    is(
+      gridID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with grid"
+    );
+
+    attrChanged = waitForEvent(EVENT_STATE_CHANGE, "grid");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("grid")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      gridID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for grid"
+    );
+    is(
+      gridID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with grid"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "grid");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("grid").removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      gridID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for grid"
+    );
+    is(
+      gridID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup for button with grid after remove"
+    );
+
+    // DIALOG
+    let dialogID = getNativeInterface(accDoc, "dialog");
+    is(
+      dialogID.getAttributeValue("AXPopupValue"),
+      "dialog",
+      "Correct AXPopupValue for button with dialog"
+    );
+    is(
+      dialogID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with dialog"
+    );
+
+    attrChanged = waitForEvent(EVENT_STATE_CHANGE, "dialog");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("dialog")
+        .setAttribute("aria-haspopup", "true");
+    });
+    await attrChanged;
+
+    is(
+      dialogID.getAttributeValue("AXPopupValue"),
+      "true",
+      "Correct AXPopupValue after change for dialog"
+    );
+    is(
+      dialogID.getAttributeValue("AXHasPopup"),
+      1,
+      "Correct AXHasPopup for button with dialog"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "dialog");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("dialog")
+        .removeAttribute("aria-haspopup");
+    });
+    await stateChanged;
+
+    is(
+      dialogID.getAttributeValue("AXPopupValue"),
+      null,
+      "Correct AXPopupValue after remove for dialog"
+    );
+    is(
+      dialogID.getAttributeValue("AXHasPopup"),
+      0,
+      "Correct AXHasPopup for button with dialog after remove"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_details_summary.js b/accessible/tests/browser/mac/browser_details_summary.js
new file mode 100644
index 0000000000..62183afef5
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_details_summary.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test details/summary
+ */
+addAccessibleTask(
+  `<details id="details"><summary>Foo</summary><p>Bar</p></details>`,
+  async (browser, accDoc) => {
+    let details = getNativeInterface(accDoc, "details");
+    is(
+      details.getAttributeValue("AXRole"),
+      "AXGroup",
+      "Correct role for details"
+    );
+    is(
+      details.getAttributeValue("AXSubrole"),
+      "AXDetails",
+      "Correct subrole for details"
+    );
+
+    let detailsChildren = details.getAttributeValue("AXChildren");
+    is(detailsChildren.length, 1, "collapsed details has only one child");
+
+    let summary = detailsChildren[0];
+    is(
+      summary.getAttributeValue("AXRole"),
+      "AXButton",
+      "Correct role for summary"
+    );
+    is(
+      summary.getAttributeValue("AXSubrole"),
+      "AXSummary",
+      "Correct subrole for summary"
+    );
+    is(summary.getAttributeValue("AXExpanded"), 0, "Summary is collapsed");
+
+    let actions = summary.actionNames;
+    ok(actions.includes("AXPress"), "Summary Has press action");
+
+    let reorder = waitForEvent(EVENT_REORDER, "details");
+    summary.performAction("AXPress");
+    is(summary.getAttributeValue("AXExpanded"), 1, "Summary is collapsed");
+    // The reorder gecko event notifies us of a tree change.
+    await reorder;
+
+    detailsChildren = details.getAttributeValue("AXChildren");
+    is(detailsChildren.length, 2, "collapsed details has only one child");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_focus.js b/accessible/tests/browser/mac/browser_focus.js
new file mode 100644
index 0000000000..6bceb06c6c
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_focus.js
@@ -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/. */
+
+"use strict";
+
+/**
+ * Test focusability
+ */
+addAccessibleTask(
+  `
+  <div role="button" id="ariabutton">hello</div> <button id="button">world</button>
+  `,
+  async (browser, accDoc) => {
+    let ariabutton = getNativeInterface(accDoc, "ariabutton");
+    let button = getNativeInterface(accDoc, "button");
+
+    is(
+      ariabutton.getAttributeValue("AXFocused"),
+      0,
+      "aria button is not focused"
+    );
+
+    is(button.getAttributeValue("AXFocused"), 0, "button is not focused");
+
+    ok(
+      !ariabutton.isAttributeSettable("AXFocused"),
+      "aria button should not be focusable"
+    );
+
+    ok(button.isAttributeSettable("AXFocused"), "button is focusable");
+
+    let evt = waitForMacEvent(
+      "AXFocusedUIElementChanged",
+      iface => iface.getAttributeValue("AXDOMIdentifier") == "button"
+    );
+
+    button.setAttributeValue("AXFocused", true);
+
+    await evt;
+
+    is(button.getAttributeValue("AXFocused"), 1, "button is focused");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_hierarchy.js b/accessible/tests/browser/mac/browser_hierarchy.js
new file mode 100644
index 0000000000..8a97e55c07
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_hierarchy.js
@@ -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/. */
+
+"use strict";
+
+/**
+ * Test AXIndexForChildUIElement
+ */
+addAccessibleTask(
+  `<p id="p">Hello <a href="#" id="link">strange</a> world`,
+  (browser, accDoc) => {
+    let p = getNativeInterface(accDoc, "p");
+
+    let children = p.getAttributeValue("AXChildren");
+    is(children.length, 3, "p has 3 children");
+    is(
+      children[1].getAttributeValue("AXDOMIdentifier"),
+      "link",
+      "second child is link"
+    );
+
+    let index = p.getParameterizedAttributeValue(
+      "AXIndexForChildUIElement",
+      children[1]
+    );
+    is(index, 1, "link is second child");
+  }
+);
+
+/**
+ * Test textbox with more than one child
+ */
+addAccessibleTask(
+  `<div id="textbox" role="textbox">Hello <a href="#">strange</a> world</div>`,
+  (browser, accDoc) => {
+    let textbox = getNativeInterface(accDoc, "textbox");
+
+    is(
+      textbox.getAttributeValue("AXChildren").length,
+      3,
+      "textbox has 3 children"
+    );
+  }
+);
+
+/**
+ * Test textbox with one child
+ */
+addAccessibleTask(
+  `<div id="textbox" role="textbox">Hello </div>`,
+  async (browser, accDoc) => {
+    let textbox = getNativeInterface(accDoc, "textbox");
+
+    is(
+      textbox.getAttributeValue("AXChildren").length,
+      0,
+      "textbox with one child is pruned"
+    );
+
+    let reorder = waitForEvent(EVENT_REORDER, "textbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      let link = content.document.createElement("a");
+      link.textContent = "World";
+      content.document.getElementById("textbox").appendChild(link);
+    });
+    await reorder;
+
+    is(
+      textbox.getAttributeValue("AXChildren").length,
+      2,
+      "textbox with two child is not pruned"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_input.js b/accessible/tests/browser/mac/browser_input.js
new file mode 100644
index 0000000000..7fa20a9d4b
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_input.js
@@ -0,0 +1,225 @@
+/* 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";
+
+function selectedTextEventPromises(stateChangeType) {
+  return [
+    waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+      return (
+        info.AXTextStateChangeType == stateChangeType &&
+        elem.getAttributeValue("AXDOMIdentifier") == "body"
+      );
+    }),
+    waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+      return (
+        info.AXTextStateChangeType == stateChangeType &&
+        elem.getAttributeValue("AXDOMIdentifier") == "input"
+      );
+    }),
+  ];
+}
+
+async function testInput(browser, accDoc) {
+  let input = getNativeInterface(accDoc, "input");
+
+  is(input.getAttributeValue("AXDescription"), "Name", "Correct input label");
+  is(input.getAttributeValue("AXTitle"), "", "Correct input title");
+  is(input.getAttributeValue("AXValue"), "Elmer Fudd", "Correct input value");
+  is(
+    input.getAttributeValue("AXNumberOfCharacters"),
+    10,
+    "Correct length of value"
+  );
+
+  ok(input.attributeNames.includes("AXSelectedText"), "Has AXSelectedText");
+  ok(
+    input.attributeNames.includes("AXSelectedTextRange"),
+    "Has AXSelectedTextRange"
+  );
+
+  let evt = Promise.all([
+    waitForMacEvent("AXFocusedUIElementChanged", "input"),
+    ...selectedTextEventPromises(AXTextStateChangeTypeSelectionMove),
+  ]);
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("input").focus();
+  });
+  await evt;
+
+  evt = Promise.all(
+    selectedTextEventPromises(AXTextStateChangeTypeSelectionExtend)
+  );
+  await SpecialPowers.spawn(browser, [], () => {
+    let elm = content.document.getElementById("input");
+    if (elm.setSelectionRange) {
+      elm.setSelectionRange(6, 9);
+    } else {
+      let r = new content.Range();
+      let textNode = elm.firstElementChild.firstChild;
+      r.setStart(textNode, 6);
+      r.setEnd(textNode, 9);
+
+      let s = content.getSelection();
+      s.removeAllRanges();
+      s.addRange(r);
+    }
+  });
+  await evt;
+
+  is(
+    input.getAttributeValue("AXSelectedText"),
+    "Fud",
+    "Correct text is selected"
+  );
+
+  Assert.deepEqual(
+    input.getAttributeValue("AXSelectedTextRange"),
+    [6, 3],
+    "correct range selected"
+  );
+
+  ok(
+    input.isAttributeSettable("AXSelectedTextRange"),
+    "AXSelectedTextRange is settable"
+  );
+
+  evt = Promise.all(
+    selectedTextEventPromises(AXTextStateChangeTypeSelectionExtend)
+  );
+  input.setAttributeValue("AXSelectedTextRange", NSRange(1, 7));
+  await evt;
+
+  Assert.deepEqual(
+    input.getAttributeValue("AXSelectedTextRange"),
+    [1, 7],
+    "correct range selected"
+  );
+
+  is(
+    input.getAttributeValue("AXSelectedText"),
+    "lmer Fu",
+    "Correct text is selected"
+  );
+
+  let domSelection = await SpecialPowers.spawn(browser, [], () => {
+    let elm = content.document.querySelector("input#input");
+    if (elm) {
+      return elm.value.substring(elm.selectionStart, elm.selectionEnd);
+    }
+
+    return content.getSelection().toString();
+  });
+
+  is(domSelection, "lmer Fu", "correct DOM selection");
+
+  is(
+    input.getParameterizedAttributeValue("AXStringForRange", NSRange(3, 5)),
+    "er Fu",
+    "AXStringForRange works"
+  );
+}
+
+/**
+ * Input selection test
+ */
+addAccessibleTask(
+  `<input aria-label="Name" id="input" value="Elmer Fudd">`,
+  testInput
+);
+
+/**
+ * contenteditable selection test
+ */
+addAccessibleTask(
+  `<div aria-label="Name" tabindex="0" role="textbox" aria-multiline="true" id="input" contenteditable>
+     <p>Elmer Fudd</p>
+   </div>`,
+  testInput
+);
+
+/**
+ * test contenteditable with selection that extends past editable part
+ */
+addAccessibleTask(
+  `<span aria-label="Name"
+         tabindex="0"
+         role="textbox"
+         id="input"
+         contenteditable>Elmer Fudd</span> <span id="notinput">is the name</span>`,
+  async (browser, accDoc) => {
+    let evt = Promise.all([
+      waitForMacEvent("AXFocusedUIElementChanged", "input"),
+      waitForMacEvent("AXSelectedTextChanged", "body"),
+      waitForMacEvent("AXSelectedTextChanged", "input"),
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("input").focus();
+    });
+    await evt;
+
+    evt = waitForEvent(EVENT_TEXT_CARET_MOVED);
+    await SpecialPowers.spawn(browser, [], () => {
+      let input = content.document.getElementById("input");
+      let notinput = content.document.getElementById("notinput");
+
+      let r = new content.Range();
+      r.setStart(input.firstChild, 4);
+      r.setEnd(notinput.firstChild, 6);
+
+      let s = content.getSelection();
+      s.removeAllRanges();
+      s.addRange(r);
+    });
+    await evt;
+
+    let input = getNativeInterface(accDoc, "input");
+
+    is(
+      input.getAttributeValue("AXSelectedText"),
+      "r Fudd",
+      "Correct text is selected in #input"
+    );
+
+    is(
+      stringForRange(
+        input,
+        input.getAttributeValue("AXSelectedTextMarkerRange")
+      ),
+      "r Fudd is the",
+      "Correct text is selected in document"
+    );
+  }
+);
+
+/**
+ * test nested content editables and their ancestor getters.
+ */
+addAccessibleTask(
+  `<div id="outer" role="textbox" contenteditable="true">
+     <p id="p">Bob <a href="#" id="link">Loblaw's</a></p>
+     <div id="inner" role="textbox" contenteditable="true">
+       Law <a href="#" id="inner_link">Blog</a>
+     </div>
+   </div>`,
+  (browser, accDoc) => {
+    let link = getNativeInterface(accDoc, "link");
+    let innerLink = getNativeInterface(accDoc, "inner_link");
+
+    let idmatches = (elem, id) => {
+      is(elem.getAttributeValue("AXDOMIdentifier"), id, "Matches ID");
+    };
+
+    idmatches(link.getAttributeValue("AXEditableAncestor"), "outer");
+    idmatches(link.getAttributeValue("AXFocusableAncestor"), "outer");
+    idmatches(link.getAttributeValue("AXHighestEditableAncestor"), "outer");
+
+    idmatches(innerLink.getAttributeValue("AXEditableAncestor"), "inner");
+    idmatches(innerLink.getAttributeValue("AXFocusableAncestor"), "inner");
+    idmatches(
+      innerLink.getAttributeValue("AXHighestEditableAncestor"),
+      "outer"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_label_title.js b/accessible/tests/browser/mac/browser_label_title.js
new file mode 100644
index 0000000000..0ed45391e9
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_label_title.js
@@ -0,0 +1,79 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test different labeling/titling schemes for text fields
+ */
+addAccessibleTask(
+  `<label for="n1">Label</label> <input id="n1">
+   <label for="n2">Two</label> <label for="n2">Labels</label> <input id="n2">
+   <input aria-label="ARIA Label" id="n3">`,
+  (browser, accDoc) => {
+    let n1 = getNativeInterface(accDoc, "n1");
+    let n1Label = n1.getAttributeValue("AXTitleUIElement");
+    // XXX: In Safari the label is an AXText with an AXValue,
+    // here it is an AXGroup witth an AXTitle
+    is(n1Label.getAttributeValue("AXTitle"), "Label");
+
+    let n2 = getNativeInterface(accDoc, "n2");
+    is(n2.getAttributeValue("AXDescription"), "TwoLabels");
+
+    let n3 = getNativeInterface(accDoc, "n3");
+    is(n3.getAttributeValue("AXDescription"), "ARIA Label");
+  }
+);
+
+/**
+ * Test to see that named groups get labels
+ */
+addAccessibleTask(
+  `<fieldset id="fieldset"><legend>Fields</legend><input aria-label="hello"></fieldset>`,
+  (browser, accDoc) => {
+    let fieldset = getNativeInterface(accDoc, "fieldset");
+    is(fieldset.getAttributeValue("AXDescription"), "Fields");
+  }
+);
+
+/**
+ * Test to see that list items don't get titled groups
+ */
+addAccessibleTask(
+  `<ul style="list-style: none;"><li id="unstyled-item">Hello</li></ul>
+   <ul><li id="styled-item">World</li></ul>`,
+  (browser, accDoc) => {
+    let unstyledItem = getNativeInterface(accDoc, "unstyled-item");
+    is(unstyledItem.getAttributeValue("AXTitle"), "");
+
+    let styledItem = getNativeInterface(accDoc, "unstyled-item");
+    is(styledItem.getAttributeValue("AXTitle"), "");
+  }
+);
+
+/**
+ * Test that we fire a title changed notification
+ */
+addAccessibleTask(
+  `<article id="article" aria-label="Hello world"></article>`,
+  async (browser, accDoc) => {
+    let article = getNativeInterface(accDoc, "article");
+    is(article.getAttributeValue("AXTitle"), "Hello world");
+    let evt = waitForMacEvent("AXTitleChanged", "article");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("article")
+        .setAttribute("aria-label", "Hello universe");
+    });
+    await evt;
+    is(article.getAttributeValue("AXTitle"), "Hello universe");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_link.js b/accessible/tests/browser/mac/browser_link.js
new file mode 100644
index 0000000000..4ae128fbf6
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_link.js
@@ -0,0 +1,125 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+ChromeUtils.defineModuleGetter(
+  this,
+  "PlacesTestUtils",
+  "resource://testing-common/PlacesTestUtils.jsm"
+);
+
+/**
+ * Test visited link properties.
+ */
+addAccessibleTask(
+  `
+  <a id="link" href="http://www.example.com/">I am a non-visited link</a><br>
+  `,
+  async (browser, accDoc) => {
+    let link = getNativeInterface(accDoc, "link");
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "link");
+
+    is(link.getAttributeValue("AXVisited"), 0, "Link has not been visited");
+
+    await PlacesTestUtils.addVisits(["http://www.example.com/"]);
+
+    await stateChanged;
+    is(link.getAttributeValue("AXVisited"), 1, "Link has been visited");
+
+    // Ensure history is cleared before running
+    await PlacesUtils.history.clear();
+  }
+);
+
+/**
+ * Test linked vs unlinked anchor tags
+ */
+addAccessibleTask(
+  `
+  <a id="link1" href="#">I am a link link</a>
+  <a id="link2" onclick="console.log('hi')">I am a link-ish link</a>
+  <a id="link3">I am a non-link link</a>
+  `,
+  async (browser, accDoc) => {
+    let link1 = getNativeInterface(accDoc, "link1");
+    is(
+      link1.getAttributeValue("AXRole"),
+      "AXLink",
+      "a[href] gets correct link role"
+    );
+    ok(
+      link1.attributeNames.includes("AXVisited"),
+      "Link has visited attribute"
+    );
+    ok(link1.attributeNames.includes("AXURL"), "Link has URL attribute");
+
+    let link2 = getNativeInterface(accDoc, "link2");
+    is(
+      link2.getAttributeValue("AXRole"),
+      "AXLink",
+      "a[onclick] gets correct link role"
+    );
+    ok(
+      link2.attributeNames.includes("AXVisited"),
+      "Link has visited attribute"
+    );
+    ok(link2.attributeNames.includes("AXURL"), "Link has URL attribute");
+
+    let link3 = getNativeInterface(accDoc, "link3");
+    is(
+      link3.getAttributeValue("AXRole"),
+      "AXGroup",
+      "bare <a> gets correct group role"
+    );
+
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "link1");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("link1").removeAttribute("href");
+    });
+    await stateChanged;
+    is(
+      link1.getAttributeValue("AXRole"),
+      "AXGroup",
+      "<a> stripped from href gets group role"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "link2");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("link2").removeAttribute("onclick");
+    });
+    await stateChanged;
+    is(
+      link2.getAttributeValue("AXRole"),
+      "AXGroup",
+      "<a> stripped from onclick gets group role"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "link3");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("link3")
+        .setAttribute("href", "http://example.com");
+    });
+    await stateChanged;
+    is(
+      link3.getAttributeValue("AXRole"),
+      "AXLink",
+      "href added to bare a gets link role"
+    );
+
+    ok(
+      link3.attributeNames.includes("AXVisited"),
+      "Link has visited attribute"
+    );
+    ok(link3.attributeNames.includes("AXURL"), "Link has URL attribute");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_live_regions.js b/accessible/tests/browser/mac/browser_live_regions.js
new file mode 100644
index 0000000000..10a03120f8
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_live_regions.js
@@ -0,0 +1,165 @@
+/* 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";
+
+/**
+ * Test live region creation and removal.
+ */
+addAccessibleTask(
+  `
+  <div id="polite" aria-relevant="removals">Polite region</div>
+  <div id="assertive" aria-live="assertive">Assertive region</div>
+  `,
+  async (browser, accDoc) => {
+    let politeRegion = getNativeInterface(accDoc, "polite");
+    ok(
+      !politeRegion.attributeNames.includes("AXARIALive"),
+      "region is not live"
+    );
+
+    let liveRegionAdded = waitForMacEvent("AXLiveRegionCreated", "polite");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("polite")
+        .setAttribute("aria-atomic", "true");
+      content.document
+        .getElementById("polite")
+        .setAttribute("aria-live", "polite");
+    });
+    await liveRegionAdded;
+    is(
+      politeRegion.getAttributeValue("AXARIALive"),
+      "polite",
+      "region is now live"
+    );
+    ok(politeRegion.getAttributeValue("AXARIAAtomic"), "region is atomic");
+    is(
+      politeRegion.getAttributeValue("AXARIARelevant"),
+      "removals",
+      "region has defined aria-relevant"
+    );
+
+    let assertiveRegion = getNativeInterface(accDoc, "assertive");
+    is(
+      assertiveRegion.getAttributeValue("AXARIALive"),
+      "assertive",
+      "region is assertive"
+    );
+    ok(
+      !assertiveRegion.getAttributeValue("AXARIAAtomic"),
+      "region is not atomic"
+    );
+    is(
+      assertiveRegion.getAttributeValue("AXARIARelevant"),
+      "additions text",
+      "region has default aria-relevant"
+    );
+
+    let liveRegionRemoved = waitForEvent(
+      EVENT_LIVE_REGION_REMOVED,
+      "assertive"
+    );
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("assertive").removeAttribute("aria-live");
+    });
+    await liveRegionRemoved;
+    ok(!assertiveRegion.getAttributeValue("AXARIALive"), "region is not live");
+
+    liveRegionAdded = waitForMacEvent("AXLiveRegionCreated", "new-region");
+    await SpecialPowers.spawn(browser, [], () => {
+      let newRegionElm = content.document.createElement("div");
+      newRegionElm.id = "new-region";
+      newRegionElm.setAttribute("aria-live", "assertive");
+      content.document.body.appendChild(newRegionElm);
+    });
+    await liveRegionAdded;
+
+    let newRegion = getNativeInterface(accDoc, "new-region");
+    is(
+      newRegion.getAttributeValue("AXARIALive"),
+      "assertive",
+      "region is assertive"
+    );
+
+    let loadComplete = Promise.all([
+      waitForMacEvent("AXLoadComplete"),
+      waitForMacEvent("AXLiveRegionCreated", "region-1"),
+      waitForMacEvent("AXLiveRegionCreated", "region-2"),
+      waitForMacEvent("AXLiveRegionCreated", "status"),
+      waitForMacEvent("AXLiveRegionCreated", "output"),
+    ]);
+
+    await SpecialPowers.spawn(browser, [], () => {
+      content.location = `data:text/html;charset=utf-8,
+        <div id="region-1" aria-live="polite"></div>
+        <div id="region-2" aria-live="assertive"></div>
+        <div id="region-3" aria-live="off"></div>
+        <div id="alert" role="alert"></div>
+        <div id="status" role="status"></div>
+        <output id="output"></output>`;
+    });
+    let webArea = (await loadComplete)[0];
+
+    is(webArea.getAttributeValue("AXRole"), "AXWebArea", "web area yeah");
+    const searchPred = {
+      AXSearchKey: "AXLiveRegionSearchKey",
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+    const liveRegions = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    Assert.deepEqual(
+      liveRegions.map(r => r.getAttributeValue("AXDOMIdentifier")),
+      ["region-1", "region-2", "alert", "status", "output"],
+      "SearchPredicate returned all live regions"
+    );
+  }
+);
+
+/**
+ * Test live region changes
+ */
+addAccessibleTask(
+  `
+  <div id="live" aria-live="polite">
+  The time is <span id="time">4:55pm</span>
+  <p id="p" style="display: none">Georgia on my mind</p>
+  <button id="button" aria-label="Start"></button>
+  </div>
+  `,
+  async (browser, accDoc) => {
+    let liveRegionChanged = waitForMacEvent("AXLiveRegionChanged", "live");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("time").textContent = "4:56pm";
+    });
+    await liveRegionChanged;
+    ok(true, "changed textContent");
+
+    liveRegionChanged = waitForMacEvent("AXLiveRegionChanged", "live");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("p").style.display = "block";
+    });
+    await liveRegionChanged;
+    ok(true, "changed display style to block");
+
+    liveRegionChanged = waitForMacEvent("AXLiveRegionChanged", "live");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("p").style.display = "none";
+    });
+    await liveRegionChanged;
+    ok(true, "changed display style to none");
+
+    liveRegionChanged = waitForMacEvent("AXLiveRegionChanged", "live");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("button")
+        .setAttribute("aria-label", "Stop");
+    });
+    await liveRegionChanged;
+    ok(true, "changed aria-label");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_mathml.js b/accessible/tests/browser/mac/browser_mathml.js
new file mode 100644
index 0000000000..1afaa8399f
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_mathml.js
@@ -0,0 +1,151 @@
+/* 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";
+
+function testMathAttr(iface, attr, subrole, textLeafValue) {
+  ok(iface.attributeNames.includes(attr), `Object has ${attr} attribute`);
+  let value = iface.getAttributeValue(attr);
+  is(
+    value.getAttributeValue("AXSubrole"),
+    subrole,
+    `${attr} value has correct subrole`
+  );
+
+  if (textLeafValue) {
+    let children = value.getAttributeValue("AXChildren");
+    is(children.length, 1, `${attr} value has one child`);
+
+    is(
+      children[0].getAttributeValue("AXRole"),
+      "AXStaticText",
+      `${attr} value's child is static text`
+    );
+    is(
+      children[0].getAttributeValue("AXValue"),
+      textLeafValue,
+      `${attr} value has correct text`
+    );
+  }
+}
+
+addAccessibleTask(
+  `<math id="math">
+     <msqrt id="sqrt">
+      <mi>-1</mi>
+    </msqrt>
+    </math>`,
+  async (browser, accDoc) => {
+    let math = getNativeInterface(accDoc, "math");
+    is(
+      math.getAttributeValue("AXSubrole"),
+      "AXDocumentMath",
+      "Math element has correct subrole"
+    );
+
+    let sqrt = getNativeInterface(accDoc, "sqrt");
+    is(
+      sqrt.getAttributeValue("AXSubrole"),
+      "AXMathSquareRoot",
+      "msqrt has correct subrole"
+    );
+
+    testMathAttr(sqrt, "AXMathRootRadicand", "AXMathIdentifier", "-1");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+    <mroot id="root">
+      <mi>x</mi>
+      <mn>3</mn>
+    </mroot>
+  </math>`,
+  async (browser, accDoc) => {
+    let root = getNativeInterface(accDoc, "root");
+    is(
+      root.getAttributeValue("AXSubrole"),
+      "AXMathRoot",
+      "mroot has correct subrole"
+    );
+
+    testMathAttr(root, "AXMathRootRadicand", "AXMathIdentifier", "x");
+    testMathAttr(root, "AXMathRootIndex", "AXMathNumber", "3");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+    <mfrac id="fraction">
+      <mi>a</mi>
+      <mi>b</mi>
+     </mfrac>
+  </math>`,
+  async (browser, accDoc) => {
+    let fraction = getNativeInterface(accDoc, "fraction");
+    is(
+      fraction.getAttributeValue("AXSubrole"),
+      "AXMathFraction",
+      "mfrac has correct subrole"
+    );
+    ok(fraction.attributeNames.includes("AXMathFractionNumerator"));
+    ok(fraction.attributeNames.includes("AXMathFractionDenominator"));
+    ok(fraction.attributeNames.includes("AXMathLineThickness"));
+
+    // Bug 1639745
+    todo_is(fraction.getAttributeValue("AXMathLineThickness"), 1);
+
+    testMathAttr(fraction, "AXMathFractionNumerator", "AXMathIdentifier", "a");
+    testMathAttr(
+      fraction,
+      "AXMathFractionDenominator",
+      "AXMathIdentifier",
+      "b"
+    );
+  }
+);
+
+addAccessibleTask(
+  `<math>
+  <msubsup id="subsup">
+    <mo>∫</mo>
+    <mn>0</mn>
+    <mn>1</mn>
+  </msubsup>
+  </math>`,
+  async (browser, accDoc) => {
+    let subsup = getNativeInterface(accDoc, "subsup");
+    is(
+      subsup.getAttributeValue("AXSubrole"),
+      "AXMathSubscriptSuperscript",
+      "msubsup has correct subrole"
+    );
+
+    testMathAttr(subsup, "AXMathSubscript", "AXMathNumber", "0");
+    testMathAttr(subsup, "AXMathSuperscript", "AXMathNumber", "1");
+    testMathAttr(subsup, "AXMathBase", "AXMathOperator", "∫");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+  <munderover id="underover">
+    <mo>∫</mo>
+    <mn>0</mn>
+    <mi>∞</mi>
+  </munderover>
+  </math>`,
+  async (browser, accDoc) => {
+    let underover = getNativeInterface(accDoc, "underover");
+    is(
+      underover.getAttributeValue("AXSubrole"),
+      "AXMathUnderOver",
+      "munderover has correct subrole"
+    );
+
+    testMathAttr(underover, "AXMathUnder", "AXMathNumber", "0");
+    testMathAttr(underover, "AXMathOver", "AXMathIdentifier", "∞");
+    testMathAttr(underover, "AXMathBase", "AXMathOperator", "∫");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_menulist.js b/accessible/tests/browser/mac/browser_menulist.js
new file mode 100644
index 0000000000..dd037c01ee
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_menulist.js
@@ -0,0 +1,52 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/attributes.js */
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR },
+  { name: "attributes.js", dir: MOCHITESTS_DIR }
+);
+
+addAccessibleTask(
+  "mac/doc_menulist.xhtml",
+  async (browser, accDoc) => {
+    const menulist = getNativeInterface(accDoc, "defaultZoom");
+
+    let actions = menulist.actionNames;
+    ok(actions.includes("AXPress"), "menu has press action");
+
+    let event = waitForMacEvent("AXMenuOpened");
+    menulist.performAction("AXPress");
+    const menupopup = await event;
+
+    const menuItems = menupopup.getAttributeValue("AXChildren");
+    is(menuItems.length, 4, "Found four children in menulist");
+    is(
+      menuItems[0].getAttributeValue("AXTitle"),
+      "50%",
+      "First item has correct title"
+    );
+    is(
+      menuItems[1].getAttributeValue("AXTitle"),
+      "100%",
+      "Second item has correct title"
+    );
+    is(
+      menuItems[2].getAttributeValue("AXTitle"),
+      "150%",
+      "Third item has correct title"
+    );
+    is(
+      menuItems[3].getAttributeValue("AXTitle"),
+      "200%",
+      "Fourth item has correct title"
+    );
+  },
+  { topLevel: false, chrome: true }
+);
diff --git a/accessible/tests/browser/mac/browser_navigate.js b/accessible/tests/browser/mac/browser_navigate.js
new file mode 100644
index 0000000000..69486676e4
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_navigate.js
@@ -0,0 +1,394 @@
+/* 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";
+
+/**
+ * Test navigation of same/different type content
+ */
+addAccessibleTask(
+  `<h1 id="hello">hello</h1>
+  world<br>
+  <a href="example.com" id="link">I am a link</a>
+  <h1 id="goodbye">goodbye</h1>`,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXSameTypeSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: 1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const hello = getNativeInterface(accDoc, "hello");
+    const goodbye = getNativeInterface(accDoc, "goodbye");
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    searchPred.AXStartElement = hello;
+
+    let sameItem = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(sameItem.length, 1, "Found one item");
+    is(
+      "goodbye",
+      sameItem[0].getAttributeValue("AXTitle"),
+      "Found correct item of same type"
+    );
+
+    searchPred.AXDirection = "AXDirectionPrevious";
+    searchPred.AXStartElement = goodbye;
+    sameItem = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(sameItem.length, 1, "Found one item");
+    is(
+      "hello",
+      sameItem[0].getAttributeValue("AXTitle"),
+      "Found correct item of same type"
+    );
+
+    searchPred.AXSearchKey = "AXDifferentTypeSearchKey";
+    let diffItem = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(diffItem.length, 1, "Found one item");
+    is(
+      "I am a link",
+      diffItem[0].getAttributeValue("AXValue"),
+      "Found correct item of different type"
+    );
+  }
+);
+
+/**
+ * Test navigation of heading levels
+ */
+addAccessibleTask(
+  `
+  <h1 id="a">a</h1>
+  <h2 id="b">b</h2>
+  <h3 id="c">c</h3>
+  <h4 id="d">d</h4>
+  <h5 id="e">e</h5>
+  <h6 id="f">f</h5>
+  <h1 id="g">g</h1>
+  <h2 id="h">h</h2>
+  <h3 id="i">i</h3>
+  <h4 id="j">j</h4>
+  <h5 id="k">k</h5>
+  <h6 id="l">l</h5>
+  this is some regular text that should be ignored
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXHeadingLevel1SearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    let h1Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h1Count, "Found two h1 items");
+
+    let h1s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const a = getNativeInterface(accDoc, "a");
+    const g = getNativeInterface(accDoc, "g");
+
+    is(
+      a.getAttributeValue("AXValue"),
+      h1s[0].getAttributeValue("AXValue"),
+      "Found correct h1 heading"
+    );
+
+    is(
+      g.getAttributeValue("AXValue"),
+      h1s[1].getAttributeValue("AXValue"),
+      "Found correct h1 heading"
+    );
+
+    searchPred.AXSearchKey = "AXHeadingLevel2SearchKey";
+
+    let h2Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h2Count, "Found two h2 items");
+
+    let h2s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const b = getNativeInterface(accDoc, "b");
+    const h = getNativeInterface(accDoc, "h");
+
+    is(
+      b.getAttributeValue("AXValue"),
+      h2s[0].getAttributeValue("AXValue"),
+      "Found correct h2 heading"
+    );
+
+    is(
+      h.getAttributeValue("AXValue"),
+      h2s[1].getAttributeValue("AXValue"),
+      "Found correct h2 heading"
+    );
+
+    searchPred.AXSearchKey = "AXHeadingLevel3SearchKey";
+
+    let h3Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h3Count, "Found two h3 items");
+
+    let h3s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const c = getNativeInterface(accDoc, "c");
+    const i = getNativeInterface(accDoc, "i");
+
+    is(
+      c.getAttributeValue("AXValue"),
+      h3s[0].getAttributeValue("AXValue"),
+      "Found correct h3 heading"
+    );
+
+    is(
+      i.getAttributeValue("AXValue"),
+      h3s[1].getAttributeValue("AXValue"),
+      "Found correct h3 heading"
+    );
+
+    searchPred.AXSearchKey = "AXHeadingLevel4SearchKey";
+
+    let h4Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h4Count, "Found two h4 items");
+
+    let h4s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const d = getNativeInterface(accDoc, "d");
+    const j = getNativeInterface(accDoc, "j");
+
+    is(
+      d.getAttributeValue("AXValue"),
+      h4s[0].getAttributeValue("AXValue"),
+      "Found correct h4 heading"
+    );
+
+    is(
+      j.getAttributeValue("AXValue"),
+      h4s[1].getAttributeValue("AXValue"),
+      "Found correct h4 heading"
+    );
+
+    searchPred.AXSearchKey = "AXHeadingLevel5SearchKey";
+
+    let h5Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h5Count, "Found two h5 items");
+
+    let h5s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const e = getNativeInterface(accDoc, "e");
+    const k = getNativeInterface(accDoc, "k");
+
+    is(
+      e.getAttributeValue("AXValue"),
+      h5s[0].getAttributeValue("AXValue"),
+      "Found correct h5 heading"
+    );
+
+    is(
+      k.getAttributeValue("AXValue"),
+      h5s[1].getAttributeValue("AXValue"),
+      "Found correct h5 heading"
+    );
+
+    searchPred.AXSearchKey = "AXHeadingLevel6SearchKey";
+
+    let h6Count = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, h6Count, "Found two h6 items");
+
+    let h6s = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const f = getNativeInterface(accDoc, "f");
+    const l = getNativeInterface(accDoc, "l");
+
+    is(
+      f.getAttributeValue("AXValue"),
+      h6s[0].getAttributeValue("AXValue"),
+      "Found correct h6 heading"
+    );
+
+    is(
+      l.getAttributeValue("AXValue"),
+      h6s[1].getAttributeValue("AXValue"),
+      "Found correct h6 heading"
+    );
+  }
+);
+
+/*
+ * Test rotor with blockquotes
+ */
+addAccessibleTask(
+  `
+  <blockquote id="first">hello I am a blockquote</blockquote>
+  <blockquote id="second">
+    I am also a blockquote of the same level
+    <br>
+    <blockquote id="third">but I have a different level</blockquote>
+  </blockquote>
+  `,
+  (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXBlockquoteSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    let bquotes = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(bquotes.length, 3, "Found three blockquotes");
+
+    const first = getNativeInterface(accDoc, "first");
+    const second = getNativeInterface(accDoc, "second");
+    const third = getNativeInterface(accDoc, "third");
+    console.log("values :");
+    console.log(first.getAttributeValue("AXValue"));
+    is(
+      first.getAttributeValue("AXValue"),
+      bquotes[0].getAttributeValue("AXValue"),
+      "Found correct first blockquote"
+    );
+
+    is(
+      second.getAttributeValue("AXValue"),
+      bquotes[1].getAttributeValue("AXValue"),
+      "Found correct second blockquote"
+    );
+
+    is(
+      third.getAttributeValue("AXValue"),
+      bquotes[2].getAttributeValue("AXValue"),
+      "Found correct third blockquote"
+    );
+  }
+);
+
+/*
+ * Test rotor with graphics
+ */
+addAccessibleTask(
+  `
+  <img id="img1" alt="image one" src="http://example.com/a11y/accessible/tests/mochitest/moz.png"><br>
+  <a href="http://example.com">
+    <img id="img2" alt="image two" src="http://example.com/a11y/accessible/tests/mochitest/moz.png">
+  </a>
+  <img src="" id="img3">
+  `,
+  (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXGraphicSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    let images = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(images.length, 3, "Found three images");
+
+    const img1 = getNativeInterface(accDoc, "img1");
+    const img2 = getNativeInterface(accDoc, "img2");
+    const img3 = getNativeInterface(accDoc, "img3");
+
+    is(
+      img1.getAttributeValue("AXDescription"),
+      images[0].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+
+    is(
+      img2.getAttributeValue("AXDescription"),
+      images[1].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+
+    is(
+      img3.getAttributeValue("AXDescription"),
+      images[2].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_outline.js b/accessible/tests/browser/mac/browser_outline.js
new file mode 100644
index 0000000000..1bb3c56bad
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_outline.js
@@ -0,0 +1,459 @@
+/* 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";
+
+/**
+ * Test outline, outline rows with computed properties
+ */
+addAccessibleTask(
+  `
+  <h3 id="tree1">
+    Foods
+  </h3>
+  <ul role="tree" aria-labelledby="tree1" id="outline">
+    <li role="treeitem" aria-expanded="false">
+      <span>
+        Fruits
+      </span>
+      <ul>
+        <li role="none">Oranges</li>
+        <li role="treeitem" aria-expanded="true">
+          <span>
+            Apples
+          </span>
+          <ul role="group">
+            <li role="none">Honeycrisp</li>
+            <li role="none">Granny Smith</li>
+          </ul>
+        </li>
+      </ul>
+    </li>
+    <li id="vegetables" role="treeitem" aria-expanded="false">
+      <span>
+        Vegetables
+      </span>
+      <ul role="group">
+        <li role="treeitem" aria-expanded="true">
+          <span>
+            Podded Vegetables
+          </span>
+          <ul role="group">
+            <li role="none">Lentil</li>
+            <li role="none">Pea</li>
+          </ul>
+        </li>
+      </ul>
+    </li>
+  </ul>
+  `,
+  async (browser, accDoc) => {
+    const outline = getNativeInterface(accDoc, "outline");
+    is(
+      outline.getAttributeValue("AXRole"),
+      "AXOutline",
+      "Correct role for outline"
+    );
+
+    const outChildren = outline.getAttributeValue("AXChildren");
+    is(outChildren.length, 2, "Outline has two direct children");
+    is(outChildren[0].getAttributeValue("AXSubrole"), "AXOutlineRow");
+    is(outChildren[1].getAttributeValue("AXSubrole"), "AXOutlineRow");
+
+    const outRows = outline.getAttributeValue("AXRows");
+    is(outRows.length, 4, "Outline has four rows");
+    is(
+      outRows[0].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of outline"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no row children, only group"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Row is level zero"
+    );
+
+    is(outRows[1].getAttributeValue("AXDisclosing"), 1, "Row is disclosing");
+    is(
+      outRows[1].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of group"
+    );
+    is(
+      outRows[1].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no row children"
+    );
+    is(
+      outRows[1].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Row is level zero"
+    );
+
+    is(
+      outRows[2].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[2].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of outline"
+    );
+    is(
+      outRows[2].getAttributeValue("AXDisclosedRows").length,
+      1,
+      "Row has one row child"
+    );
+    is(
+      outRows[2].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Row is level zero"
+    );
+
+    is(outRows[3].getAttributeValue("AXDisclosing"), 1, "Row is disclosing");
+    is(
+      outRows[3]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      outRows[2].getAttributeValue("AXDescription"),
+      "Row is direct child of row[2]"
+    );
+    is(
+      outRows[3].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no row children"
+    );
+    is(
+      outRows[3].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Row is level one"
+    );
+
+    let evt = waitForMacEvent("AXRowExpanded", "vegetables");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("vegetables")
+        .setAttribute("aria-expanded", "true");
+    });
+    await evt;
+    is(
+      outRows[2].getAttributeValue("AXDisclosing"),
+      1,
+      "Row is disclosing after being expanded"
+    );
+
+    evt = waitForMacEvent("AXRowCollapsed", "vegetables");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("vegetables")
+        .setAttribute("aria-expanded", "false");
+    });
+    await evt;
+    is(
+      outRows[2].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing after being collapsed again"
+    );
+  }
+);
+
+/**
+ * Test outline, outline rows with declared properties
+ */
+addAccessibleTask(
+  `
+  <h3 id="tree1">
+  Foods
+  </h3>
+  <ul role="tree" aria-labelledby="tree1" id="outline">
+    <li role="treeitem"
+        aria-level="1"
+        aria-setsize="2"
+        aria-posinset="1"
+        aria-expanded="false">
+      <span>
+        Fruits
+      </span>
+      <ul>
+        <li role="treeitem"
+             aria-level="3"
+             aria-setsize="2"
+             aria-posinset="1">
+            Oranges
+        </li>
+        <li role="treeitem"
+            aria-level="2"
+            aria-setsize="2"
+            aria-posinset="2"
+            aria-expanded="true">
+          <span>
+            Apples
+          </span>
+          <ul role="group">
+            <li role="treeitem"
+                 aria-level="3"
+                 aria-setsize="2"
+                 aria-posinset="1">
+                Honeycrisp
+            </li>
+            <li role="treeitem"
+                 aria-level="3"
+                 aria-setsize="2"
+                 aria-posinset="2">
+               Granny Smith
+            </li>
+          </ul>
+        </li>
+      </ul>
+    </li>
+    <li role="treeitem"
+        aria-level="1"
+        aria-setsize="2"
+        aria-posinset="2"
+        aria-expanded="false">
+      <span>
+        Vegetables
+      </span>
+      <ul role="group">
+        <li role="treeitem"
+            aria-level="2"
+            aria-setsize="1"
+            aria-posinset="1"
+            aria-expanded="true">
+          <span>
+            Podded Vegetables
+          </span>
+          <ul role="group">
+            <li role="treeitem"
+                 aria-level="3"
+                 aria-setsize="2"
+                 aria-posinset="1">
+               Lentil
+            </li>
+            <li role="treeitem"
+                 aria-level="3"
+                 aria-setsize="2"
+                 aria-posinset="2">
+                 Pea
+            </li>
+          </ul>
+        </li>
+      </ul>
+    </li>
+  </ul>
+  `,
+  async (browser, accDoc) => {
+    const outline = getNativeInterface(accDoc, "outline");
+    is(
+      outline.getAttributeValue("AXRole"),
+      "AXOutline",
+      "Correct role for outline"
+    );
+
+    const outChildren = outline.getAttributeValue("AXChildren");
+    is(outChildren.length, 2, "Outline has two direct children");
+    is(outChildren[0].getAttributeValue("AXSubrole"), "AXOutlineRow");
+    is(outChildren[1].getAttributeValue("AXSubrole"), "AXOutlineRow");
+
+    const outRows = outline.getAttributeValue("AXRows");
+    is(outRows.length, 9, "Outline has nine rows");
+    is(
+      outRows[0].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of outline"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no direct row children, has list"
+    );
+    is(
+      outRows[0].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Row is level zero"
+    );
+
+    is(outRows[2].getAttributeValue("AXDisclosing"), 1, "Row is disclosing");
+    is(
+      outRows[2].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of group"
+    );
+    is(
+      outRows[2].getAttributeValue("AXDisclosedRows").length,
+      2,
+      "Row has two row children"
+    );
+    is(
+      outRows[2].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Row is level one"
+    );
+
+    is(
+      outRows[3].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[3]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      outRows[2].getAttributeValue("AXDescription"),
+      "Row is direct child of row 2"
+    );
+
+    is(
+      outRows[3].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no row children"
+    );
+    is(
+      outRows[3].getAttributeValue("AXDisclosureLevel"),
+      2,
+      "Row is level two"
+    );
+
+    is(
+      outRows[5].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[5].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Row is direct child of outline"
+    );
+    is(
+      outRows[5].getAttributeValue("AXDisclosedRows").length,
+      1,
+      "Row has no one row child"
+    );
+    is(
+      outRows[5].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Row is level zero"
+    );
+
+    is(outRows[6].getAttributeValue("AXDisclosing"), 1, "Row is disclosing");
+    is(
+      outRows[6]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      outRows[5].getAttributeValue("AXDescription"),
+      "Row is direct child of row 5"
+    );
+    is(
+      outRows[6].getAttributeValue("AXDisclosedRows").length,
+      2,
+      "Row has two row children"
+    );
+    is(
+      outRows[6].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Row is level one"
+    );
+
+    is(
+      outRows[7].getAttributeValue("AXDisclosing"),
+      0,
+      "Row is not disclosing"
+    );
+    is(
+      outRows[7]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      outRows[6].getAttributeValue("AXDescription"),
+      "Row is direct child of row 6"
+    );
+    is(
+      outRows[7].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Row has no row children"
+    );
+    is(
+      outRows[7].getAttributeValue("AXDisclosureLevel"),
+      2,
+      "Row is level two"
+    );
+  }
+);
+
+// Test outline that isn't built with li/uls gets correct desc
+addAccessibleTask(
+  `
+  <div role="tree" id="tree" tabindex="0" aria-label="My drive" aria-activedescendant="myfiles">
+    <div id="myfiles" role="treeitem" aria-label="My files" aria-selected="true" aria-expanded="false">My files</div>
+    <div role="treeitem" aria-label="Shared items" aria-selected="false" aria-expanded="false">Shared items</div>
+  </div>
+  `,
+  async (browser, accDoc) => {
+    const tree = getNativeInterface(accDoc, "tree");
+    is(tree.getAttributeValue("AXRole"), "AXOutline", "Correct role for tree");
+
+    const treeItems = tree.getAttributeValue("AXChildren");
+    is(treeItems.length, 2, "Outline has two direct children");
+    is(treeItems[0].getAttributeValue("AXSubrole"), "AXOutlineRow");
+    is(treeItems[1].getAttributeValue("AXSubrole"), "AXOutlineRow");
+
+    const outRows = tree.getAttributeValue("AXRows");
+    is(outRows.length, 2, "Outline has two rows");
+
+    is(
+      outRows[0].getAttributeValue("AXDescription"),
+      "My files",
+      "files labelled correctly"
+    );
+    is(
+      outRows[1].getAttributeValue("AXDescription"),
+      "Shared items",
+      "shared items labelled correctly"
+    );
+  }
+);
+
+// Test outline registers AXDisclosed attr as settable
+addAccessibleTask(
+  `
+  <div role="tree" id="tree" tabindex="0" aria-label="My drive" aria-activedescendant="myfiles">
+    <div id="myfiles" role="treeitem" aria-label="My files" aria-selected="true" aria-expanded="false">My files</div>
+    <div role="treeitem" aria-label="Shared items" aria-selected="false" aria-expanded="true">Shared items</div>
+  </div>
+  `,
+  async (browser, accDoc) => {
+    const tree = getNativeInterface(accDoc, "tree");
+    const treeItems = tree.getAttributeValue("AXChildren");
+
+    is(treeItems.length, 2, "Outline has two direct children");
+    is(treeItems[0].getAttributeValue("AXDisclosing"), 0);
+    is(treeItems[1].getAttributeValue("AXDisclosing"), 1);
+
+    is(treeItems[0].isAttributeSettable("AXDisclosing"), true);
+    is(treeItems[1].isAttributeSettable("AXDisclosing"), true);
+
+    // attempt to change attribute values
+    treeItems[0].setAttributeValue("AXDisclosing", 1);
+    treeItems[0].setAttributeValue("AXDisclosing", 0);
+
+    // verify they're unchanged
+    is(treeItems[0].getAttributeValue("AXDisclosing"), 0);
+    is(treeItems[1].getAttributeValue("AXDisclosing"), 1);
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_outline_xul.js b/accessible/tests/browser/mac/browser_outline_xul.js
new file mode 100644
index 0000000000..66eebebf50
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_outline_xul.js
@@ -0,0 +1,274 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/attributes.js */
+loadScripts({ name: "attributes.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  "mac/doc_tree.xhtml",
+  async (browser, accDoc) => {
+    const tree = getNativeInterface(accDoc, "tree");
+    is(
+      tree.getAttributeValue("AXRole"),
+      "AXOutline",
+      "Found tree with role outline"
+    );
+    // XUL trees store all rows as direct children of the outline,
+    // so we should see nine here instead of just three:
+    // (Groceries, Fruits, Veggies)
+    const treeChildren = tree.getAttributeValue("AXChildren");
+    is(treeChildren.length, 9, "Found nine direct children");
+
+    const treeCols = tree.getAttributeValue("AXColumns");
+    is(treeCols.length, 1, "Found one column in tree");
+
+    // Here, we should get only outline rows, not the title
+    const treeRows = tree.getAttributeValue("AXRows");
+    is(treeRows.length, 8, "Found 8 total rows");
+
+    is(
+      treeRows[0].getAttributeValue("AXDescription"),
+      "Fruits",
+      "Located correct first row, row has correct desc"
+    );
+    is(
+      treeRows[0].getAttributeValue("AXDisclosing"),
+      1,
+      "Fruits is disclosing"
+    );
+    is(
+      treeRows[0].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Fruits is disclosed by outline"
+    );
+    is(
+      treeRows[0].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Fruits is level zero"
+    );
+    let disclosedRows = treeRows[0].getAttributeValue("AXDisclosedRows");
+    is(disclosedRows.length, 2, "Fruits discloses two rows");
+    is(
+      disclosedRows[0].getAttributeValue("AXDescription"),
+      "Apple",
+      "fruits discloses apple"
+    );
+    is(
+      disclosedRows[1].getAttributeValue("AXDescription"),
+      "Orange",
+      "fruits discloses orange"
+    );
+
+    is(
+      treeRows[1].getAttributeValue("AXDescription"),
+      "Apple",
+      "Located correct second row, row has correct desc"
+    );
+    is(
+      treeRows[1].getAttributeValue("AXDisclosing"),
+      0,
+      "Apple is not disclosing"
+    );
+    is(
+      treeRows[1]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Fruits",
+      "Apple is disclosed by fruits"
+    );
+    is(
+      treeRows[1].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Apple is level one"
+    );
+    is(
+      treeRows[1].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Apple does not disclose rows"
+    );
+
+    is(
+      treeRows[2].getAttributeValue("AXDescription"),
+      "Orange",
+      "Located correct third row, row has correct desc"
+    );
+    is(
+      treeRows[2].getAttributeValue("AXDisclosing"),
+      0,
+      "Orange is not disclosing"
+    );
+    is(
+      treeRows[2]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Fruits",
+      "Orange is disclosed by fruits"
+    );
+    is(
+      treeRows[2].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Orange is level one"
+    );
+    is(
+      treeRows[2].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Orange does not disclose rows"
+    );
+
+    is(
+      treeRows[3].getAttributeValue("AXDescription"),
+      "Veggies",
+      "Located correct fourth row, row has correct desc"
+    );
+    is(
+      treeRows[3].getAttributeValue("AXDisclosing"),
+      1,
+      "Veggies is disclosing"
+    );
+    is(
+      treeRows[3].getAttributeValue("AXDisclosedByRow"),
+      null,
+      "Veggies is disclosed by outline"
+    );
+    is(
+      treeRows[3].getAttributeValue("AXDisclosureLevel"),
+      0,
+      "Veggies is level zero"
+    );
+    disclosedRows = treeRows[3].getAttributeValue("AXDisclosedRows");
+    is(disclosedRows.length, 2, "Veggies discloses two rows");
+    is(
+      disclosedRows[0].getAttributeValue("AXDescription"),
+      "Green Veggies",
+      "Veggies discloses green veggies"
+    );
+    is(
+      disclosedRows[1].getAttributeValue("AXDescription"),
+      "Squash",
+      "Veggies discloses squash"
+    );
+
+    is(
+      treeRows[4].getAttributeValue("AXDescription"),
+      "Green Veggies",
+      "Located correct fifth row, row has correct desc"
+    );
+    is(
+      treeRows[4].getAttributeValue("AXDisclosing"),
+      1,
+      "Green veggies is disclosing"
+    );
+    is(
+      treeRows[4]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Veggies",
+      "Green Veggies is disclosed by veggies"
+    );
+    is(
+      treeRows[4].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Green veggies is level one"
+    );
+    disclosedRows = treeRows[4].getAttributeValue("AXDisclosedRows");
+    is(disclosedRows.length, 2, "Green veggies has two rows");
+    is(
+      disclosedRows[0].getAttributeValue("AXDescription"),
+      "Spinach",
+      "Green veggies discloses spinach"
+    );
+    is(
+      disclosedRows[1].getAttributeValue("AXDescription"),
+      "Peas",
+      "Green veggies discloses peas"
+    );
+
+    is(
+      treeRows[5].getAttributeValue("AXDescription"),
+      "Spinach",
+      "Located correct sixth row, row has correct desc"
+    );
+    is(
+      treeRows[5].getAttributeValue("AXDisclosing"),
+      0,
+      "Spinach is not disclosing"
+    );
+    is(
+      treeRows[5]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Green Veggies",
+      "Spinach is disclosed by green veggies"
+    );
+    is(
+      treeRows[5].getAttributeValue("AXDisclosureLevel"),
+      2,
+      "Spinach is level two"
+    );
+    is(
+      treeRows[5].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Spinach does not disclose rows"
+    );
+
+    is(
+      treeRows[6].getAttributeValue("AXDescription"),
+      "Peas",
+      "Located correct seventh row, row has correct desc"
+    );
+    is(
+      treeRows[6].getAttributeValue("AXDisclosing"),
+      0,
+      "Peas is not disclosing"
+    );
+    is(
+      treeRows[6]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Green Veggies",
+      "Peas is disclosed by green veggies"
+    );
+    is(
+      treeRows[6].getAttributeValue("AXDisclosureLevel"),
+      2,
+      "Peas is level two"
+    );
+    is(
+      treeRows[6].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Peas does not disclose rows"
+    );
+
+    is(
+      treeRows[7].getAttributeValue("AXDescription"),
+      "Squash",
+      "Located correct eighth row, row has correct desc"
+    );
+    is(
+      treeRows[7].getAttributeValue("AXDisclosing"),
+      0,
+      "Squash is not disclosing"
+    );
+    is(
+      treeRows[7]
+        .getAttributeValue("AXDisclosedByRow")
+        .getAttributeValue("AXDescription"),
+      "Veggies",
+      "Squash is disclosed by veggies"
+    );
+    is(
+      treeRows[7].getAttributeValue("AXDisclosureLevel"),
+      1,
+      "Squash is level one"
+    );
+    is(
+      treeRows[7].getAttributeValue("AXDisclosedRows").length,
+      0,
+      "Squash does not disclose rows"
+    );
+  },
+  { topLevel: false, chrome: true }
+);
diff --git a/accessible/tests/browser/mac/browser_popupbutton.js b/accessible/tests/browser/mac/browser_popupbutton.js
new file mode 100644
index 0000000000..9916a7cb12
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_popupbutton.js
@@ -0,0 +1,153 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+// Test dropdown select element
+addAccessibleTask(
+  `<select id="select" aria-label="Choose a number">
+    <option id="one" selected>One</option>
+    <option id="two">Two</option>
+    <option id="three">Three</option>
+    <option id="four" disabled>Four</option>
+  </select>`,
+  async (browser, accDoc) => {
+    // Test combobox
+    let select = getNativeInterface(accDoc, "select");
+    is(
+      select.getAttributeValue("AXRole"),
+      "AXPopUpButton",
+      "select has AXPopupButton role"
+    );
+    ok(select.attributeNames.includes("AXValue"), "select advertises AXValue");
+    is(
+      select.getAttributeValue("AXValue"),
+      "One",
+      "select has correctt initial value"
+    );
+    ok(
+      !select.attributeNames.includes("AXHasPopup"),
+      "select does not advertise AXHasPopup"
+    );
+    is(
+      select.getAttributeValue("AXHasPopup"),
+      null,
+      "select does not provide value for AXHasPopup"
+    );
+
+    ok(select.actionNames.includes("AXPress"), "Selectt has press action");
+    // These three events happen in quick succession when select is pressed
+    let events = Promise.all([
+      waitForMacEvent("AXMenuOpened"),
+      waitForMacEvent("AXSelectedChildrenChanged"),
+      waitForMacEvent("AXFocusedUIElementChanged"),
+    ]);
+    select.performAction("AXPress");
+    // Only capture the target of AXMenuOpened (first element)
+    let [menu] = await events;
+
+    is(menu.getAttributeValue("AXRole"), "AXMenu", "dropdown has AXMenu role");
+    is(
+      menu.getAttributeValue("AXSelectedChildren").length,
+      1,
+      "dropdown has single selected child"
+    );
+
+    let selectedChildren = menu.getAttributeValue("AXSelectedChildren");
+    is(selectedChildren.length, 1, "Only one child is selected");
+    is(selectedChildren[0].getAttributeValue("AXRole"), "AXMenuItem");
+    is(selectedChildren[0].getAttributeValue("AXTitle"), "One");
+
+    let menuParent = menu.getAttributeValue("AXParent");
+    is(
+      menuParent.getAttributeValue("AXRole"),
+      "AXPopUpButton",
+      "dropdown parent is a popup button"
+    );
+
+    let menuItems = menu.getAttributeValue("AXChildren").map(c => {
+      return [
+        c.getAttributeValue("AXMenuItemMarkChar"),
+        c.getAttributeValue("AXRole"),
+        c.getAttributeValue("AXTitle"),
+        c.getAttributeValue("AXEnabled"),
+      ];
+    });
+
+    Assert.deepEqual(
+      menuItems,
+      [
+        ["✓", "AXMenuItem", "One", true],
+        [null, "AXMenuItem", "Two", true],
+        [null, "AXMenuItem", "Three", true],
+        [null, "AXMenuItem", "Four", false],
+      ],
+      "Menu items have correct checkmark on current value, correctt roles, correct titles, and correct AXEnabled value"
+    );
+
+    events = Promise.all([
+      waitForMacEvent("AXSelectedChildrenChanged"),
+      waitForMacEvent("AXFocusedUIElementChanged"),
+    ]);
+    EventUtils.synthesizeKey("KEY_ArrowDown");
+    let [, menuItem] = await events;
+    is(
+      menuItem.getAttributeValue("AXTitle"),
+      "Two",
+      "Focused menu item has correct title"
+    );
+
+    selectedChildren = menu.getAttributeValue("AXSelectedChildren");
+    is(selectedChildren.length, 1, "Only one child is selected");
+    is(
+      selectedChildren[0].getAttributeValue("AXTitle"),
+      "Two",
+      "Selected child matches focused item"
+    );
+
+    events = Promise.all([
+      waitForMacEvent("AXSelectedChildrenChanged"),
+      waitForMacEvent("AXFocusedUIElementChanged"),
+    ]);
+    EventUtils.synthesizeKey("KEY_ArrowDown");
+    [, menuItem] = await events;
+    is(
+      menuItem.getAttributeValue("AXTitle"),
+      "Three",
+      "Focused menu item has correct title"
+    );
+
+    selectedChildren = menu.getAttributeValue("AXSelectedChildren");
+    is(selectedChildren.length, 1, "Only one child is selected");
+    is(
+      selectedChildren[0].getAttributeValue("AXTitle"),
+      "Three",
+      "Selected child matches focused item"
+    );
+
+    events = Promise.all([
+      waitForMacEvent("AXMenuClosed"),
+      waitForMacEvent("AXFocusedUIElementChanged"),
+    ]);
+    menuItem.performAction("AXPress");
+    let [, newFocus] = await events;
+    is(
+      newFocus.getAttributeValue("AXRole"),
+      "AXPopUpButton",
+      "Newly focused element is AXPopupButton"
+    );
+    is(
+      newFocus.getAttributeValue("AXValue"),
+      "Three",
+      "select has correct new value"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_radio_position.js b/accessible/tests/browser/mac/browser_radio_position.js
new file mode 100644
index 0000000000..76f518a91e
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_radio_position.js
@@ -0,0 +1,321 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+function getChildRoles(parent) {
+  return parent
+    .getAttributeValue("AXChildren")
+    .map(c => c.getAttributeValue("AXRole"));
+}
+
+function getLinkedTitles(element) {
+  return element
+    .getAttributeValue("AXLinkedUIElements")
+    .map(c => c.getAttributeValue("AXTitle"));
+}
+
+/**
+ * Test radio group
+ */
+addAccessibleTask(
+  `<div role="radiogroup" id="radioGroup">
+    <div role="radio"
+         id="radioGroupItem1">
+       Regular crust
+    </div>
+    <div role="radio"
+         id="radioGroupItem2">
+       Deep dish
+    </div>
+    <div role="radio"
+         id="radioGroupItem3">
+       Thin crust
+    </div>
+  </div>`,
+  async (browser, accDoc) => {
+    let item1 = getNativeInterface(accDoc, "radioGroupItem1");
+    let item2 = getNativeInterface(accDoc, "radioGroupItem2");
+    let item3 = getNativeInterface(accDoc, "radioGroupItem3");
+    let titleList = ["Regular crust", "Deep dish", "Thin crust"];
+
+    Assert.deepEqual(
+      titleList,
+      [item1, item2, item3].map(c => c.getAttributeValue("AXTitle")),
+      "Title list matches"
+    );
+
+    let linkedElems = item1.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Item 1 has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(item1),
+      titleList,
+      "Item one has correctly ordered linked elements"
+    );
+
+    linkedElems = item2.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Item 2 has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(item2),
+      titleList,
+      "Item two has correctly ordered linked elements"
+    );
+
+    linkedElems = item3.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Item 3 has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(item3),
+      titleList,
+      "Item three has correctly ordered linked elements"
+    );
+  }
+);
+
+/**
+ * Test dynamic add to a radio group
+ */
+addAccessibleTask(
+  `<div role="radiogroup" id="radioGroup">
+    <div role="radio"
+         id="radioGroupItem1">
+       Option One
+    </div>
+  </div>`,
+  async (browser, accDoc) => {
+    let item1 = getNativeInterface(accDoc, "radioGroupItem1");
+    let linkedElems = item1.getAttributeValue("AXLinkedUIElements");
+
+    is(linkedElems.length, 1, "Item 1 has one linked UI elem");
+    is(
+      linkedElems[0].getAttributeValue("AXTitle"),
+      item1.getAttributeValue("AXTitle"),
+      "Item 1 is first element"
+    );
+
+    let reorder = waitForEvent(EVENT_REORDER, "radioGroup");
+    await SpecialPowers.spawn(browser, [], () => {
+      let d = content.document.createElement("div");
+      d.setAttribute("role", "radio");
+      content.document.getElementById("radioGroup").appendChild(d);
+    });
+    await reorder;
+
+    let radioGroup = getNativeInterface(accDoc, "radioGroup");
+    let groupMembers = radioGroup.getAttributeValue("AXChildren");
+    is(groupMembers.length, 2, "Radio group has two members");
+    let item2 = groupMembers[1];
+    item1 = getNativeInterface(accDoc, "radioGroupItem1");
+    let titleList = ["Option One", ""];
+
+    Assert.deepEqual(
+      titleList,
+      [item1, item2].map(c => c.getAttributeValue("AXTitle")),
+      "Title list matches"
+    );
+
+    linkedElems = item1.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 2, "Item 1 has two linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(item1),
+      titleList,
+      "Item one has correctly ordered linked elements"
+    );
+
+    linkedElems = item2.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 2, "Item 2 has two linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(item2),
+      titleList,
+      "Item two has correctly ordered linked elements"
+    );
+  }
+);
+
+/**
+ * Test input[type=radio] for single group
+ */
+addAccessibleTask(
+  `<input type="radio" id="cat" name="animal"><label for="cat">Cat</label>
+   <input type="radio" id="dog" name="animal"><label for="dog">Dog</label>
+   <input type="radio" id="catdog" name="animal"><label for="catdog">CatDog</label>`,
+  async (browser, accDoc) => {
+    let cat = getNativeInterface(accDoc, "cat");
+    let dog = getNativeInterface(accDoc, "dog");
+    let catdog = getNativeInterface(accDoc, "catdog");
+    let titleList = ["Cat", "Dog", "CatDog"];
+
+    Assert.deepEqual(
+      titleList,
+      [cat, dog, catdog].map(x => x.getAttributeValue("AXTitle")),
+      "Title list matches"
+    );
+
+    let linkedElems = cat.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Cat has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(cat),
+      titleList,
+      "Cat has correctly ordered linked elements"
+    );
+
+    linkedElems = dog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Dog has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(dog),
+      titleList,
+      "Dog has correctly ordered linked elements"
+    );
+
+    linkedElems = catdog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Catdog has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(catdog),
+      titleList,
+      "catdog has correctly ordered linked elements"
+    );
+  }
+);
+
+/**
+ * Test input[type=radio] for different groups
+ */
+addAccessibleTask(
+  `<input type="radio" id="cat" name="one"><label for="cat">Cat</label>
+   <input type="radio" id="dog" name="two"><label for="dog">Dog</label>
+   <input type="radio" id="catdog"><label for="catdog">CatDog</label>`,
+  async (browser, accDoc) => {
+    let cat = getNativeInterface(accDoc, "cat");
+    let dog = getNativeInterface(accDoc, "dog");
+    let catdog = getNativeInterface(accDoc, "catdog");
+
+    let linkedElems = cat.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 1, "Cat has one linked UI elem");
+    is(
+      linkedElems[0].getAttributeValue("AXTitle"),
+      cat.getAttributeValue("AXTitle"),
+      "Cat is only element"
+    );
+
+    linkedElems = dog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 1, "Dog has one linked UI elem");
+    is(
+      linkedElems[0].getAttributeValue("AXTitle"),
+      dog.getAttributeValue("AXTitle"),
+      "Dog is only element"
+    );
+
+    linkedElems = catdog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 0, "Catdog has no linked UI elem");
+  }
+);
+
+/**
+ * Test input[type=radio] for single group across DOM
+ */
+addAccessibleTask(
+  `<input type="radio" id="cat" name="animal"><label for="cat">Cat</label>
+   <div>
+    <span>
+      <input type="radio" id="dog" name="animal"><label for="dog">Dog</label>
+    </span>
+   </div>
+   <div>
+   <input type="radio" id="catdog" name="animal"><label for="catdog">CatDog</label>
+   </div>`,
+  async (browser, accDoc) => {
+    let cat = getNativeInterface(accDoc, "cat");
+    let dog = getNativeInterface(accDoc, "dog");
+    let catdog = getNativeInterface(accDoc, "catdog");
+    let titleList = ["Cat", "Dog", "CatDog"];
+
+    Assert.deepEqual(
+      titleList,
+      [cat, dog, catdog].map(x => x.getAttributeValue("AXTitle")),
+      "Title list matches"
+    );
+
+    let linkedElems = cat.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Cat has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(cat),
+      titleList,
+      "cat has correctly ordered linked elements"
+    );
+
+    linkedElems = dog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Dog has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(dog),
+      titleList,
+      "dog has correctly ordered linked elements"
+    );
+
+    linkedElems = catdog.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 3, "Catdog has three linked UI elems");
+    Assert.deepEqual(
+      getLinkedTitles(catdog),
+      titleList,
+      "catdog has correctly ordered linked elements"
+    );
+  }
+);
+
+/**
+ * Test dynamic add of input[type=radio] in a single group
+ */
+addAccessibleTask(
+  `<div id="container"><input type="radio" id="cat" name="animal"></div>`,
+  async (browser, accDoc) => {
+    let cat = getNativeInterface(accDoc, "cat");
+    let container = getNativeInterface(accDoc, "container");
+
+    let containerChildren = container.getAttributeValue("AXChildren");
+    is(containerChildren.length, 1, "container has one button");
+    is(
+      containerChildren[0].getAttributeValue("AXRole"),
+      "AXRadioButton",
+      "Container child is radio button"
+    );
+
+    let linkedElems = cat.getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 1, "Cat has 1 linked UI elem");
+    is(
+      linkedElems[0].getAttributeValue("AXTitle"),
+      cat.getAttributeValue("AXTitle"),
+      "Cat is first element"
+    );
+    let reorder = waitForEvent(EVENT_REORDER, "container");
+    await SpecialPowers.spawn(browser, [], () => {
+      let input = content.document.createElement("input");
+      input.setAttribute("type", "radio");
+      input.setAttribute("name", "animal");
+      content.document.getElementById("container").appendChild(input);
+    });
+    await reorder;
+
+    container = getNativeInterface(accDoc, "container");
+    containerChildren = container.getAttributeValue("AXChildren");
+
+    is(containerChildren.length, 2, "container has two children");
+
+    Assert.deepEqual(
+      getChildRoles(container),
+      ["AXRadioButton", "AXRadioButton"],
+      "Both children are radio buttons"
+    );
+
+    linkedElems = containerChildren[0].getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 2, "Cat has 2 linked elements");
+
+    linkedElems = containerChildren[1].getAttributeValue("AXLinkedUIElements");
+    is(linkedElems.length, 2, "New button has 2 linked elements");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_range.js b/accessible/tests/browser/mac/browser_range.js
new file mode 100644
index 0000000000..7158dfcb30
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_range.js
@@ -0,0 +1,92 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test input[type=range]
+ */
+addAccessibleTask(
+  `<input id="range" type="range" min="1" max="100" value="1" step="10">`,
+  async (browser, accDoc) => {
+    let range = getNativeInterface(accDoc, "range");
+    is(range.getAttributeValue("AXRole"), "AXSlider", "Correct AXSlider role");
+    is(range.getAttributeValue("AXValue"), "1", "Correct initial value");
+
+    let actions = range.actionNames;
+    ok(actions.includes("AXDecrement"), "Has decrement action");
+    ok(actions.includes("AXIncrement"), "Has increment action");
+
+    let evt = waitForMacEvent("AXValueChanged");
+    range.performAction("AXIncrement");
+    await evt;
+    is(range.getAttributeValue("AXValue"), "11", "Correct increment value");
+
+    evt = waitForMacEvent("AXValueChanged");
+    range.performAction("AXDecrement");
+    await evt;
+    is(range.getAttributeValue("AXValue"), "1", "Correct decrement value");
+
+    evt = waitForMacEvent("AXValueChanged");
+    // Adjust value via script in content
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("range").value = 41;
+    });
+    await evt;
+    is(
+      range.getAttributeValue("AXValue"),
+      "41",
+      "Correct value from content change"
+    );
+  }
+);
+
+/**
+ * Test input[type=range]
+ */
+addAccessibleTask(
+  `<input type="number" value="11" id="number">`,
+  async (browser, accDoc) => {
+    let number = getNativeInterface(accDoc, "number");
+    is(
+      number.getAttributeValue("AXRole"),
+      "AXIncrementor",
+      "Correct AXIncrementor role"
+    );
+    is(number.getAttributeValue("AXValue"), "11", "Correct initial value");
+
+    let actions = number.actionNames;
+    ok(actions.includes("AXDecrement"), "Has decrement action");
+    ok(actions.includes("AXIncrement"), "Has increment action");
+
+    let evt = waitForMacEvent("AXValueChanged");
+    number.performAction("AXIncrement");
+    await evt;
+    is(number.getAttributeValue("AXValue"), "12", "Correct increment value");
+
+    evt = waitForMacEvent("AXValueChanged");
+    number.performAction("AXDecrement");
+    await evt;
+    is(number.getAttributeValue("AXValue"), "11", "Correct decrement value");
+
+    evt = waitForMacEvent("AXValueChanged");
+    // Adjust value via script in content
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("number").value = 42;
+    });
+    await evt;
+    is(
+      number.getAttributeValue("AXValue"),
+      "42",
+      "Correct value from content change"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_required.js b/accessible/tests/browser/mac/browser_required.js
new file mode 100644
index 0000000000..5f552d44c3
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_required.js
@@ -0,0 +1,145 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test required and aria-required attributes on checkboxes
+ * and radio buttons.
+ */
+addAccessibleTask(
+  `
+  <form>
+    <input type="checkbox" id="checkbox" required>
+   <br>
+    <input type="radio" id="radio" required>
+   <br>
+    <input type="checkbox" id="ariaCheckbox" aria-required="true">
+   <br>
+    <input type="radio" id="ariaRadio" aria-required="true">
+  </form>
+  `,
+  async (browser, accDoc) => {
+    // Check initial AXRequired values are correct
+    let radio = getNativeInterface(accDoc, "radio");
+    is(
+      radio.getAttributeValue("AXRequired"),
+      1,
+      "Correct required val for radio"
+    );
+
+    let ariaRadio = getNativeInterface(accDoc, "ariaRadio");
+    is(
+      ariaRadio.getAttributeValue("AXRequired"),
+      1,
+      "Correct required val for ariaRadio"
+    );
+
+    let checkbox = getNativeInterface(accDoc, "checkbox");
+    is(
+      checkbox.getAttributeValue("AXRequired"),
+      1,
+      "Correct required val for checkbox"
+    );
+
+    let ariaCheckbox = getNativeInterface(accDoc, "ariaCheckbox");
+    is(
+      ariaCheckbox.getAttributeValue("AXRequired"),
+      1,
+      "Correct required val for ariaCheckbox"
+    );
+
+    // Change aria-required, verify AXRequired is updated
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "ariaCheckbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("ariaCheckbox")
+        .setAttribute("aria-required", "false");
+    });
+    await stateChanged;
+
+    is(
+      ariaCheckbox.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after false set for ariaCheckbox"
+    );
+
+    // Remove aria-required, verify AXRequired is updated
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "ariaCheckbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("ariaCheckbox")
+        .removeAttribute("aria-required");
+    });
+    await stateChanged;
+
+    is(
+      ariaCheckbox.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after removal for ariaCheckbox"
+    );
+
+    // Change aria-required, verify AXRequired is updated
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "ariaRadio");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("ariaRadio")
+        .setAttribute("aria-required", "false");
+    });
+    await stateChanged;
+
+    is(
+      ariaRadio.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after false set for ariaRadio"
+    );
+
+    // Remove aria-required, verify AXRequired is updated
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "ariaRadio");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("ariaRadio")
+        .removeAttribute("aria-required");
+    });
+    await stateChanged;
+
+    is(
+      ariaRadio.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after removal for ariaRadio"
+    );
+
+    // Remove required, verify AXRequired is updated
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "checkbox");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("checkbox").removeAttribute("required");
+    });
+    await stateChanged;
+
+    is(
+      checkbox.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after removal for checkbox"
+    );
+
+    stateChanged = waitForEvent(EVENT_STATE_CHANGE, "radio");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("radio").removeAttribute("required");
+    });
+    await stateChanged;
+
+    is(
+      checkbox.getAttributeValue("AXRequired"),
+      0,
+      "Correct required after removal for radio"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_rich_listbox.js b/accessible/tests/browser/mac/browser_rich_listbox.js
new file mode 100644
index 0000000000..97dd6785bb
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_rich_listbox.js
@@ -0,0 +1,73 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/attributes.js */
+loadScripts({ name: "attributes.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  "mac/doc_rich_listbox.xhtml",
+  async (browser, accDoc) => {
+    const categories = getNativeInterface(accDoc, "categories");
+    const categoriesChildren = categories.getAttributeValue("AXChildren");
+    is(categoriesChildren.length, 4, "Found listbox and 4 items");
+
+    const general = getNativeInterface(accDoc, "general");
+    is(
+      general.getAttributeValue("AXTitle"),
+      "general",
+      "general has appropriate title"
+    );
+    is(
+      categoriesChildren[0].getAttributeValue("AXTitle"),
+      general.getAttributeValue("AXTitle"),
+      "Found general listitem"
+    );
+    is(
+      general.getAttributeValue("AXEnabled"),
+      1,
+      "general is enabled, not dimmed"
+    );
+
+    const home = getNativeInterface(accDoc, "home");
+    is(home.getAttributeValue("AXTitle"), "home", "home has appropriate title");
+    is(
+      categoriesChildren[1].getAttributeValue("AXTitle"),
+      home.getAttributeValue("AXTitle"),
+      "Found home listitem"
+    );
+    is(home.getAttributeValue("AXEnabled"), 1, "Home is enabled, not dimmed");
+
+    const search = getNativeInterface(accDoc, "search");
+    is(
+      search.getAttributeValue("AXTitle"),
+      "search",
+      "search has appropriate title"
+    );
+    is(
+      categoriesChildren[2].getAttributeValue("AXTitle"),
+      search.getAttributeValue("AXTitle"),
+      "Found search listitem"
+    );
+    is(
+      search.getAttributeValue("AXEnabled"),
+      1,
+      "search is enabled, not dimmed"
+    );
+
+    const privacy = getNativeInterface(accDoc, "privacy");
+    is(
+      privacy.getAttributeValue("AXTitle"),
+      "privacy",
+      "privacy has appropriate title"
+    );
+    is(
+      categoriesChildren[3].getAttributeValue("AXTitle"),
+      privacy.getAttributeValue("AXTitle"),
+      "Found privacy listitem"
+    );
+  },
+  { topLevel: false, chrome: true }
+);
diff --git a/accessible/tests/browser/mac/browser_roles_elements.js b/accessible/tests/browser/mac/browser_roles_elements.js
new file mode 100644
index 0000000000..5f07961486
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_roles_elements.js
@@ -0,0 +1,309 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test different HTML elements for their roles and subroles
+ */
+function testRoleAndSubRole(accDoc, id, axRole, axSubRole, axRoleDescription) {
+  let el = getNativeInterface(accDoc, id);
+  if (axRole) {
+    is(
+      el.getAttributeValue("AXRole"),
+      axRole,
+      "AXRole for " + id + " is " + axRole
+    );
+  }
+  if (axSubRole) {
+    is(
+      el.getAttributeValue("AXSubrole"),
+      axSubRole,
+      "Subrole for " + id + " is " + axSubRole
+    );
+  }
+  if (axRoleDescription) {
+    is(
+      el.getAttributeValue("AXRoleDescription"),
+      axRoleDescription,
+      "Subrole for " + id + " is " + axRoleDescription
+    );
+  }
+}
+
+addAccessibleTask(
+  `
+  <!-- WAI-ARIA landmark roles -->
+  <div id="application" role="application"></div>
+  <div id="banner" role="banner"></div>
+  <div id="complementary" role="complementary"></div>
+  <div id="contentinfo" role="contentinfo"></div>
+  <div id="form" role="form"></div>
+  <div id="main" role="main"></div>
+  <div id="navigation" role="navigation"></div>
+  <div id="search" role="search"></div>
+  <div id="searchbox" role="searchbox"></div>
+
+  <!-- DPub landmarks -->
+  <div id="dPubNavigation" role="doc-index"></div>
+  <div id="dPubRegion" role="doc-introduction"></div>
+
+  <!-- Other WAI-ARIA widget roles -->
+  <div id="alert" role="alert"></div>
+  <div id="alertdialog" role="alertdialog"></div>
+  <div id="article" role="article"></div>
+  <div id="code" role="code"></div>
+  <div id="dialog" role="dialog"></div>
+  <div id="ariaDocument" role="document"></div>
+  <div id="log" role="log"></div>
+  <div id="marquee" role="marquee"></div>
+  <div id="ariaMath" role="math"></div>
+  <div id="note" role="note"></div>
+  <div id="ariaRegion" aria-label="region" role="region"></div>
+  <div id="ariaStatus" role="status"></div>
+  <div id="switch" role="switch"></div>
+  <div id="timer" role="timer"></div>
+  <div id="tooltip" role="tooltip"></div>
+
+  <!-- text entries -->
+  <div id="textbox_multiline" role="textbox" aria-multiline="true"></div>
+  <div id="textbox_singleline" role="textbox" aria-multiline="false"></div>
+  <textarea id="textArea"></textarea>
+  <input id="textInput">
+
+  <!-- True HTML5 search box -->
+  <input type="search" id="htmlSearch" />
+
+  <!-- A button morphed into a toggle via ARIA -->
+  <button id="toggle" aria-pressed="false"></button>
+
+  <!-- A button with a 'banana' role description -->
+  <button id="banana" aria-roledescription="banana"></button>
+
+  <!-- Other elements -->
+  <del id="deletion">Deleted text</del>
+  <dl id="dl"><dt id="dt">term</dt><dd id="dd">definition</dd></dl>
+  <hr id="hr" />
+  <ins id="insertion">Inserted text</ins>
+
+  <!-- Some SVG stuff -->
+  <svg xmlns="http://www.w3.org/2000/svg" version="1.1" id="svg"
+       xmlns:xlink="http://www.w3.org/1999/xlink">
+    <g id="g">
+      <title>g</title>
+    </g>
+    <rect width="300" height="100" id="rect"
+          style="fill:rgb(0,0,255);stroke-width:1;stroke:rgb(0,0,0)">
+      <title>rect</title>
+    </rect>
+    <circle cx="100" cy="50" r="40" stroke="black" id="circle"
+            stroke-width="2" fill="red">
+      <title>circle</title>
+    </circle>
+    <ellipse cx="300" cy="80" rx="100" ry="50" id="ellipse"
+             style="fill:yellow;stroke:purple;stroke-width:2">
+      <title>ellipse</title>
+    </ellipse>
+    <line x1="0" y1="0" x2="200" y2="200" id="line"
+          style="stroke:rgb(255,0,0);stroke-width:2">
+      <title>line</title>
+    </line>
+    <polygon points="200,10 250,190 160,210" id="polygon"
+             style="fill:lime;stroke:purple;stroke-width:1">
+      <title>polygon</title>
+    </polygon>
+    <polyline points="20,20 40,25 60,40 80,120 120,140 200,180" id="polyline"
+              style="fill:none;stroke:black;stroke-width:3" >
+      <title>polyline</title>
+    </polyline>
+    <path d="M150 0 L75 200 L225 200 Z" id="path">
+      <title>path</title>
+    </path>
+    <image x1="25" y1="80" width="50" height="20" id="image"
+           xlink:href="../moz.png">
+      <title>image</title>
+    </image>
+  </svg>`,
+  (browser, accDoc) => {
+    // WAI-ARIA landmark subroles, regardless of AXRole
+    testRoleAndSubRole(accDoc, "application", null, "AXLandmarkApplication");
+    testRoleAndSubRole(accDoc, "banner", null, "AXLandmarkBanner");
+    testRoleAndSubRole(
+      accDoc,
+      "complementary",
+      null,
+      "AXLandmarkComplementary"
+    );
+    testRoleAndSubRole(accDoc, "contentinfo", null, "AXLandmarkContentInfo");
+    testRoleAndSubRole(accDoc, "form", null, "AXLandmarkForm");
+    testRoleAndSubRole(accDoc, "main", null, "AXLandmarkMain");
+    testRoleAndSubRole(accDoc, "navigation", null, "AXLandmarkNavigation");
+    testRoleAndSubRole(accDoc, "search", null, "AXLandmarkSearch");
+    testRoleAndSubRole(accDoc, "searchbox", null, "AXSearchField");
+
+    // DPub roles map into two categories, sample one of each
+    testRoleAndSubRole(
+      accDoc,
+      "dPubNavigation",
+      "AXGroup",
+      "AXLandmarkNavigation"
+    );
+    testRoleAndSubRole(accDoc, "dPubRegion", "AXGroup", "AXLandmarkRegion");
+
+    // ARIA widget roles
+    testRoleAndSubRole(accDoc, "alert", null, "AXApplicationAlert");
+    testRoleAndSubRole(
+      accDoc,
+      "alertdialog",
+      "AXGroup",
+      "AXApplicationAlertDialog",
+      "alert dialog"
+    );
+    testRoleAndSubRole(accDoc, "article", null, "AXDocumentArticle");
+    testRoleAndSubRole(accDoc, "code", "AXGroup", "AXCodeStyleGroup");
+    testRoleAndSubRole(accDoc, "dialog", null, "AXApplicationDialog", "dialog");
+    testRoleAndSubRole(accDoc, "ariaDocument", null, "AXDocument");
+    testRoleAndSubRole(accDoc, "log", null, "AXApplicationLog");
+    testRoleAndSubRole(accDoc, "marquee", null, "AXApplicationMarquee");
+    testRoleAndSubRole(accDoc, "ariaMath", null, "AXDocumentMath");
+    testRoleAndSubRole(accDoc, "note", null, "AXDocumentNote");
+    testRoleAndSubRole(accDoc, "ariaRegion", null, "AXLandmarkRegion");
+    testRoleAndSubRole(accDoc, "ariaStatus", "AXGroup", "AXApplicationStatus");
+    testRoleAndSubRole(accDoc, "switch", "AXCheckBox", "AXSwitch");
+    testRoleAndSubRole(accDoc, "timer", null, "AXApplicationTimer");
+    testRoleAndSubRole(accDoc, "tooltip", "AXGroup", "AXUserInterfaceTooltip");
+
+    // Text boxes
+    testRoleAndSubRole(accDoc, "textbox_multiline", "AXTextArea");
+    testRoleAndSubRole(accDoc, "textbox_singleline", "AXTextArea");
+    testRoleAndSubRole(accDoc, "textArea", "AXTextArea");
+    testRoleAndSubRole(accDoc, "textInput", "AXTextField");
+
+    // True HTML5 search field
+    testRoleAndSubRole(accDoc, "htmlSearch", "AXTextField", "AXSearchField");
+
+    // A button morphed into a toggle by ARIA
+    testRoleAndSubRole(accDoc, "toggle", "AXCheckBox", "AXToggle");
+
+    // A banana button
+    testRoleAndSubRole(accDoc, "banana", "AXButton", null, "banana");
+
+    // Other elements
+    testRoleAndSubRole(accDoc, "deletion", "AXGroup", "AXDeleteStyleGroup");
+    testRoleAndSubRole(accDoc, "dl", "AXList", "AXDescriptionList");
+    testRoleAndSubRole(accDoc, "dt", "AXGroup", "AXTerm");
+    testRoleAndSubRole(accDoc, "dd", "AXGroup", "AXDescription");
+    testRoleAndSubRole(accDoc, "hr", "AXSplitter", "AXContentSeparator");
+    testRoleAndSubRole(accDoc, "insertion", "AXGroup", "AXInsertStyleGroup");
+
+    // Some SVG stuff
+    testRoleAndSubRole(accDoc, "svg", "AXImage");
+    testRoleAndSubRole(accDoc, "g", "AXGroup");
+    testRoleAndSubRole(accDoc, "rect", "AXImage");
+    testRoleAndSubRole(accDoc, "circle", "AXImage");
+    testRoleAndSubRole(accDoc, "ellipse", "AXImage");
+    testRoleAndSubRole(accDoc, "line", "AXImage");
+    testRoleAndSubRole(accDoc, "polygon", "AXImage");
+    testRoleAndSubRole(accDoc, "polyline", "AXImage");
+    testRoleAndSubRole(accDoc, "path", "AXImage");
+    testRoleAndSubRole(accDoc, "image", "AXImage");
+  }
+);
+
+addAccessibleTask(
+  `
+  <figure id="figure">
+    <img id="img" src="http://example.com/a11y/accessible/tests/mochitest/moz.png" alt="Logo">
+    <p>Non-image figure content</p>
+    <figcaption id="figcaption">Old Mozilla logo</figcaption>
+  </figure>`,
+  (browser, accDoc) => {
+    let figure = getNativeInterface(accDoc, "figure");
+    ok(!figure.getAttributeValue("AXTitle"), "Figure should not have a title");
+    is(
+      figure.getAttributeValue("AXDescription"),
+      "Old Mozilla logo",
+      "Correct figure label"
+    );
+    is(figure.getAttributeValue("AXRole"), "AXGroup", "Correct figure role");
+    is(
+      figure.getAttributeValue("AXRoleDescription"),
+      "figure",
+      "Correct figure role description"
+    );
+
+    let img = getNativeInterface(accDoc, "img");
+    ok(!img.getAttributeValue("AXTitle"), "img should not have a title");
+    is(img.getAttributeValue("AXDescription"), "Logo", "Correct img label");
+    is(img.getAttributeValue("AXRole"), "AXImage", "Correct img role");
+    is(
+      img.getAttributeValue("AXRoleDescription"),
+      "image",
+      "Correct img role description"
+    );
+
+    let figcaption = getNativeInterface(accDoc, "figcaption");
+    ok(
+      !figcaption.getAttributeValue("AXTitle"),
+      "figcaption should not have a title"
+    );
+    ok(
+      !figcaption.getAttributeValue("AXDescription"),
+      "figcaption should not have a label"
+    );
+    is(
+      figcaption.getAttributeValue("AXRole"),
+      "AXGroup",
+      "Correct figcaption role"
+    );
+    is(
+      figcaption.getAttributeValue("AXRoleDescription"),
+      "group",
+      "Correct figcaption role description"
+    );
+  }
+);
+
+addAccessibleTask(`<button>hello world</button>`, async (browser, accDoc) => {
+  const webArea = accDoc.nativeInterface.QueryInterface(
+    Ci.nsIAccessibleMacInterface
+  );
+
+  is(
+    webArea.getAttributeValue("AXRole"),
+    "AXWebArea",
+    "web area should be an AXWebArea"
+  );
+  ok(
+    !webArea.attributeNames.includes("AXSubrole"),
+    "AXWebArea should not have a subrole"
+  );
+
+  let roleChanged = waitForMacEvent("AXMozRoleChanged");
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.body.setAttribute("role", "application");
+  });
+  await roleChanged;
+
+  is(
+    webArea.getAttributeValue("AXRole"),
+    "AXWebArea",
+    "web area should retain AXWebArea role"
+  );
+  ok(
+    !webArea.attributeNames.includes("AXSubrole"),
+    "AXWebArea should not have a subrole"
+  );
+
+  let rootGroup = webArea.getAttributeValue("AXChildren")[0];
+  is(rootGroup.getAttributeValue("AXRole"), "AXGroup");
+  is(rootGroup.getAttributeValue("AXSubrole"), "AXLandmarkApplication");
+});
diff --git a/accessible/tests/browser/mac/browser_rootgroup.js b/accessible/tests/browser/mac/browser_rootgroup.js
new file mode 100644
index 0000000000..87f5e6c04f
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_rootgroup.js
@@ -0,0 +1,196 @@
+/* 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";
+
+/**
+ * Test document with no single group child
+ */
+addAccessibleTask(
+  `<p id="p1">hello</p><p>world</p>`,
+  async (browser, accDoc) => {
+    let doc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    let docChildren = doc.getAttributeValue("AXChildren");
+    is(docChildren.length, 1, "The document contains a root group");
+
+    let rootGroup = docChildren[0];
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+
+    is(
+      rootGroup.getAttributeValue("AXChildren").length,
+      2,
+      "Root group has two children"
+    );
+
+    // From bottom-up
+    let p1 = getNativeInterface(accDoc, "p1");
+    rootGroup = p1.getAttributeValue("AXParent");
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+  }
+);
+
+/**
+ * Test document with a top-level group
+ */
+addAccessibleTask(
+  `<div role="grouping" id="group"><p>hello</p><p>world</p></div>`,
+  async (browser, accDoc) => {
+    let doc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    let docChildren = doc.getAttributeValue("AXChildren");
+    is(docChildren.length, 1, "The document contains a root group");
+
+    let rootGroup = docChildren[0];
+    is(
+      rootGroup.getAttributeValue("AXDOMIdentifier"),
+      "group",
+      "Root group is a document element"
+    );
+
+    // Adding an 'application' role to the body should
+    // create a root group with an application subrole.
+    let evt = waitForMacEvent("AXMozRoleChanged");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.body.setAttribute("role", "application");
+    });
+    await evt;
+
+    is(
+      doc.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "doc still has web area role"
+    );
+    is(
+      doc.getAttributeValue("AXRoleDescription"),
+      "HTML Content",
+      "doc has correct role description"
+    );
+    ok(
+      !doc.attributeNames.includes("AXSubrole"),
+      "sub role not available on web area"
+    );
+
+    rootGroup = doc.getAttributeValue("AXChildren")[0];
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+    is(
+      rootGroup.getAttributeValue("AXRole"),
+      "AXGroup",
+      "root group has AXGroup role"
+    );
+    is(
+      rootGroup.getAttributeValue("AXSubrole"),
+      "AXLandmarkApplication",
+      "root group has application subrole"
+    );
+    is(
+      rootGroup.getAttributeValue("AXRoleDescription"),
+      "application",
+      "root group has application role description"
+    );
+  }
+);
+
+/**
+ * Test document with body[role=application] and a top-level group
+ */
+addAccessibleTask(
+  `<div role="grouping" id="group"><p>hello</p><p>world</p></div>`,
+  async (browser, accDoc) => {
+    let doc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    is(
+      doc.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "doc still has web area role"
+    );
+    is(
+      doc.getAttributeValue("AXRoleDescription"),
+      "HTML Content",
+      "doc has correct role description"
+    );
+    ok(
+      !doc.attributeNames.includes("AXSubrole"),
+      "sub role not available on web area"
+    );
+
+    let rootGroup = doc.getAttributeValue("AXChildren")[0];
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+    is(
+      rootGroup.getAttributeValue("AXRole"),
+      "AXGroup",
+      "root group has AXGroup role"
+    );
+    is(
+      rootGroup.getAttributeValue("AXSubrole"),
+      "AXLandmarkApplication",
+      "root group has application subrole"
+    );
+    is(
+      rootGroup.getAttributeValue("AXRoleDescription"),
+      "application",
+      "root group has application role description"
+    );
+  },
+  { contentDocBodyAttrs: { role: "application" } }
+);
+
+/**
+ * Test document with a single button
+ */
+addAccessibleTask(
+  `<button id="button">I am a button</button>`,
+  async (browser, accDoc) => {
+    let doc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    let docChildren = doc.getAttributeValue("AXChildren");
+    is(docChildren.length, 1, "The document contains a root group");
+
+    let rootGroup = docChildren[0];
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+
+    let rootGroupChildren = rootGroup.getAttributeValue("AXChildren");
+    is(rootGroupChildren.length, 1, "Root group has one children");
+
+    is(
+      rootGroupChildren[0].getAttributeValue("AXRole"),
+      "AXButton",
+      "Button is child of root group"
+    );
+
+    // From bottom-up
+    let button = getNativeInterface(accDoc, "button");
+    rootGroup = button.getAttributeValue("AXParent");
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_rotor.js b/accessible/tests/browser/mac/browser_rotor.js
new file mode 100644
index 0000000000..8b0d12de9d
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_rotor.js
@@ -0,0 +1,1697 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/states.js */
+loadScripts({ name: "states.js", dir: MOCHITESTS_DIR });
+
+ChromeUtils.defineModuleGetter(
+  this,
+  "PlacesTestUtils",
+  "resource://testing-common/PlacesTestUtils.jsm"
+);
+
+/**
+ * Test rotor with heading
+ */
+addAccessibleTask(
+  `<h1 id="hello">hello</h1><br><h2 id="world">world</h2><br>goodbye`,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXHeadingSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const headingCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(2, headingCount, "Found two headings");
+
+    const headings = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const hello = getNativeInterface(accDoc, "hello");
+    const world = getNativeInterface(accDoc, "world");
+    is(
+      hello.getAttributeValue("AXTitle"),
+      headings[0].getAttributeValue("AXTitle"),
+      "Found correct first heading"
+    );
+    is(
+      world.getAttributeValue("AXTitle"),
+      headings[1].getAttributeValue("AXTitle"),
+      "Found correct second heading"
+    );
+  }
+);
+
+/**
+ * Test rotor with articles
+ */
+addAccessibleTask(
+  `<article id="google">
+  <h2>Google Chrome</h2>
+  <p>Google Chrome is a web browser developed by Google, released in 2008. Chrome is the world's most popular web browser today!</p>
+  </article>
+
+  <article id="moz">
+  <h2>Mozilla Firefox</h2>
+  <p>Mozilla Firefox is an open-source web browser developed by Mozilla. Firefox has been the second most popular web browser since January, 2018.</p>
+  </article>
+
+  <article id="microsoft">
+  <h2>Microsoft Edge</h2>
+  <p>Microsoft Edge is a web browser developed by Microsoft, released in 2015. Microsoft Edge replaced Internet Explorer.</p>
+  </article> `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXArticleSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const articleCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(3, articleCount, "Found three articles");
+
+    const articles = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const google = getNativeInterface(accDoc, "google");
+    const moz = getNativeInterface(accDoc, "moz");
+    const microsoft = getNativeInterface(accDoc, "microsoft");
+
+    is(
+      google.getAttributeValue("AXTitle"),
+      articles[0].getAttributeValue("AXTitle"),
+      "Found correct first article"
+    );
+    is(
+      moz.getAttributeValue("AXTitle"),
+      articles[1].getAttributeValue("AXTitle"),
+      "Found correct second article"
+    );
+    is(
+      microsoft.getAttributeValue("AXTitle"),
+      articles[2].getAttributeValue("AXTitle"),
+      "Found correct third article"
+    );
+  }
+);
+
+/**
+ * Test rotor with tables
+ */
+addAccessibleTask(
+  `
+  <table id="shapes">
+    <tr>
+      <th>Shape</th>
+      <th>Color</th>
+      <th>Do I like it?</th>
+    </tr>
+    <tr>
+      <td>Triangle</td>
+      <td>Green</td>
+      <td>No</td>
+    </tr>
+    <tr>
+      <td>Square</td>
+      <td>Red</td>
+      <td>Yes</td>
+    </tr>
+  </table>
+  <br>
+  <table id="food">
+    <tr>
+      <th>Grocery Item</th>
+      <th>Quantity</th>
+    </tr>
+    <tr>
+      <td>Onions</td>
+      <td>2</td>
+    </tr>
+    <tr>
+      <td>Yogurt</td>
+      <td>1</td>
+    </tr>
+    <tr>
+      <td>Spinach</td>
+      <td>1</td>
+    </tr>
+    <tr>
+      <td>Cherries</td>
+      <td>12</td>
+    </tr>
+    <tr>
+      <td>Carrots</td>
+      <td>5</td>
+    </tr>
+  </table>
+  <br>
+  <div role="table" id="ariaTable">
+    <div role="row">
+      <div role="cell">
+        I am a tiny aria table
+      </div>
+    </div>
+  </div>
+  <br>
+  <table role="grid" id="grid">
+    <tr>
+      <th>A</th>
+      <th>B</th>
+      <th>C</th>
+      <th>D</th>
+      <th>E</th>
+    </tr>
+    <tr>
+      <th>F</th>
+      <th>G</th>
+      <th>H</th>
+      <th>I</th>
+      <th>J</th>
+    </tr>
+  </table>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXTableSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const tableCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(4, tableCount, "Found four tables");
+
+    const tables = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const shapes = getNativeInterface(accDoc, "shapes");
+    const food = getNativeInterface(accDoc, "food");
+    const ariaTable = getNativeInterface(accDoc, "ariaTable");
+    const grid = getNativeInterface(accDoc, "grid");
+
+    is(
+      shapes.getAttributeValue("AXColumnCount"),
+      tables[0].getAttributeValue("AXColumnCount"),
+      "Found correct first table"
+    );
+    is(
+      food.getAttributeValue("AXColumnCount"),
+      tables[1].getAttributeValue("AXColumnCount"),
+      "Found correct second table"
+    );
+    is(
+      ariaTable.getAttributeValue("AXColumnCount"),
+      tables[2].getAttributeValue("AXColumnCount"),
+      "Found correct third table"
+    );
+    is(
+      grid.getAttributeValue("AXColumnCount"),
+      tables[3].getAttributeValue("AXColumnCount"),
+      "Found correct fourth table"
+    );
+  }
+);
+
+/**
+ * Test rotor with landmarks
+ */
+addAccessibleTask(
+  `
+  <header id="header">
+    <h1>This is a heading within a header</h1>
+  </header>
+
+  <nav id="nav">
+    <a href="example.com">I am a link in a nav</a>
+  </nav>
+
+  <main id="main">
+    I am some text in a main element
+  </main>
+
+  <footer id="footer">
+    <h2>Heading in footer</h2>
+  </footer>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXLandmarkSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const landmarkCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(4, landmarkCount, "Found four landmarks");
+
+    const landmarks = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const header = getNativeInterface(accDoc, "header");
+    const nav = getNativeInterface(accDoc, "nav");
+    const main = getNativeInterface(accDoc, "main");
+    const footer = getNativeInterface(accDoc, "footer");
+
+    is(
+      header.getAttributeValue("AXSubrole"),
+      landmarks[0].getAttributeValue("AXSubrole"),
+      "Found correct first landmark"
+    );
+    is(
+      nav.getAttributeValue("AXSubrole"),
+      landmarks[1].getAttributeValue("AXSubrole"),
+      "Found correct second landmark"
+    );
+    is(
+      main.getAttributeValue("AXSubrole"),
+      landmarks[2].getAttributeValue("AXSubrole"),
+      "Found correct third landmark"
+    );
+    is(
+      footer.getAttributeValue("AXSubrole"),
+      landmarks[3].getAttributeValue("AXSubrole"),
+      "Found correct fourth landmark"
+    );
+  }
+);
+
+/**
+ * Test rotor with aria landmarks
+ */
+addAccessibleTask(
+  `
+  <div id="banner" role="banner">
+    <h1>This is a heading within a banner</h1>
+  </div>
+
+  <div id="nav" role="navigation">
+    <a href="example.com">I am a link in a nav</a>
+  </div>
+
+  <div id="main" role="main">
+    I am some text in a main element
+  </div>
+
+  <div id="contentinfo" role="contentinfo">
+    <h2>Heading in contentinfo</h2>
+  </div>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXLandmarkSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const landmarkCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(4, landmarkCount, "Found four landmarks");
+
+    const landmarks = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const banner = getNativeInterface(accDoc, "banner");
+    const nav = getNativeInterface(accDoc, "nav");
+    const main = getNativeInterface(accDoc, "main");
+    const contentinfo = getNativeInterface(accDoc, "contentinfo");
+
+    is(
+      banner.getAttributeValue("AXSubrole"),
+      landmarks[0].getAttributeValue("AXSubrole"),
+      "Found correct first landmark"
+    );
+    is(
+      nav.getAttributeValue("AXSubrole"),
+      landmarks[1].getAttributeValue("AXSubrole"),
+      "Found correct second landmark"
+    );
+    is(
+      main.getAttributeValue("AXSubrole"),
+      landmarks[2].getAttributeValue("AXSubrole"),
+      "Found correct third landmark"
+    );
+    is(
+      contentinfo.getAttributeValue("AXSubrole"),
+      landmarks[3].getAttributeValue("AXSubrole"),
+      "Found correct fourth landmark"
+    );
+  }
+);
+
+/**
+ * Test rotor with buttons
+ */
+addAccessibleTask(
+  `
+  <button id="button">hello world</button><br>
+
+  <input type="button" value="another kinda button" id="input"><br>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXButtonSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const buttonCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(2, buttonCount, "Found two buttons");
+
+    const buttons = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const button = getNativeInterface(accDoc, "button");
+    const input = getNativeInterface(accDoc, "input");
+
+    is(
+      button.getAttributeValue("AXRole"),
+      buttons[0].getAttributeValue("AXRole"),
+      "Found correct button"
+    );
+    is(
+      input.getAttributeValue("AXRole"),
+      buttons[1].getAttributeValue("AXRole"),
+      "Found correct input button"
+    );
+  }
+);
+
+/**
+ * Test rotor with heading
+ */
+addAccessibleTask(
+  `<h1 id="hello">hello</h1><br><h2 id="world">world</h2><br>goodbye`,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXHeadingSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const headingCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(2, headingCount, "Found two headings");
+
+    const headings = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const hello = getNativeInterface(accDoc, "hello");
+    const world = getNativeInterface(accDoc, "world");
+    is(
+      hello.getAttributeValue("AXTitle"),
+      headings[0].getAttributeValue("AXTitle"),
+      "Found correct first heading"
+    );
+    is(
+      world.getAttributeValue("AXTitle"),
+      headings[1].getAttributeValue("AXTitle"),
+      "Found correct second heading"
+    );
+  }
+);
+
+/**
+ * Test rotor with buttons
+ */
+addAccessibleTask(
+  `
+  <form>
+    <h2>input[type=button]</h2>
+    <input type="button" value="apply" id="button1">
+
+    <h2>input[type=submit]</h2>
+    <input type="submit" value="submit now" id="submit">
+
+    <h2>input[type=image]</h2>
+    <input type="image" src="sample.jpg" alt="submit image" id="image">
+
+    <h2>input[type=reset]</h2>
+    <input type="reset" value="reset now" id="reset">
+
+    <h2>button element</h2>
+    <button id="button2">Submit button</button>
+  </form>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXControlSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const controlsCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(5, controlsCount, "Found 5 controls");
+
+    const controls = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const button1 = getNativeInterface(accDoc, "button1");
+    const submit = getNativeInterface(accDoc, "submit");
+    const image = getNativeInterface(accDoc, "image");
+    const reset = getNativeInterface(accDoc, "reset");
+    const button2 = getNativeInterface(accDoc, "button2");
+
+    is(
+      button1.getAttributeValue("AXTitle"),
+      controls[0].getAttributeValue("AXTitle"),
+      "Found correct first control"
+    );
+    is(
+      submit.getAttributeValue("AXTitle"),
+      controls[1].getAttributeValue("AXTitle"),
+      "Found correct second control"
+    );
+    is(
+      image.getAttributeValue("AXTitle"),
+      controls[2].getAttributeValue("AXTitle"),
+      "Found correct third control"
+    );
+    is(
+      reset.getAttributeValue("AXTitle"),
+      controls[3].getAttributeValue("AXTitle"),
+      "Found correct third control"
+    );
+    is(
+      button2.getAttributeValue("AXTitle"),
+      controls[4].getAttributeValue("AXTitle"),
+      "Found correct third control"
+    );
+  }
+);
+
+/**
+ * Test rotor with inputs
+ */
+addAccessibleTask(
+  `
+  <input type="text" value="I'm a text field." id="text"><br>
+  <input type="text" value="me too" id="implText"><br>
+  <textarea id="textarea">this is some text in a text area</textarea><br>
+  <input type="tel" value="0000000000" id="tel"><br>
+  <input type="url" value="https://example.com" id="url"><br>
+  <input type="email" value="hi@example.com" id="email"><br>
+  <input type="password" value="blah" id="password"><br>
+  <input type="month" value="2020-01" id="month"><br>
+  <input type="week" value="2020-W01" id="week"><br>
+  <input type="number" value="12" id="number"><br>
+  <input type="range" value="12" min="0" max="20" id="range"><br>
+  <input type="date" value="2020-01-01" id="date"><br>
+  <input type="time" value="10:10:10" id="time"><br>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXControlSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const controlsCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(13, controlsCount, "Found 13 controls");
+    // the extra controls here come from our time control
+    // we can't filter out its internal buttons/incrementors
+    // like we do with the date entry because the time entry
+    // doesn't have its own specific role -- its just a grouping.
+
+    const controls = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const text = getNativeInterface(accDoc, "text");
+    const implText = getNativeInterface(accDoc, "implText");
+    const textarea = getNativeInterface(accDoc, "textarea");
+    const tel = getNativeInterface(accDoc, "tel");
+    const url = getNativeInterface(accDoc, "url");
+    const email = getNativeInterface(accDoc, "email");
+    const password = getNativeInterface(accDoc, "password");
+    const month = getNativeInterface(accDoc, "month");
+    const week = getNativeInterface(accDoc, "week");
+    const number = getNativeInterface(accDoc, "number");
+    const range = getNativeInterface(accDoc, "range");
+
+    const toCheck = [
+      text,
+      implText,
+      textarea,
+      tel,
+      url,
+      email,
+      password,
+      month,
+      week,
+      number,
+      range,
+    ];
+
+    for (let i = 0; i < toCheck.length; i++) {
+      is(
+        toCheck[i].getAttributeValue("AXValue"),
+        controls[i].getAttributeValue("AXValue"),
+        "Found correct input control"
+      );
+    }
+
+    const date = getNativeInterface(accDoc, "date");
+    const time = getNativeInterface(accDoc, "time");
+
+    is(
+      date.getAttributeValue("AXRole"),
+      controls[11].getAttributeValue("AXRole"),
+      "Found corrent date editor"
+    );
+
+    is(
+      time.getAttributeValue("AXRole"),
+      controls[12].getAttributeValue("AXRole"),
+      "Found corrent time editor"
+    );
+  }
+);
+
+/**
+ * Test rotor with groupings
+ */
+addAccessibleTask(
+  `
+  <fieldset>
+    <legend>Radios</legend>
+    <div role="radiogroup" id="radios">
+      <input id="radio1" type="radio" name="g1" checked="checked"> Radio 1
+      <input id="radio2" type="radio" name="g1"> Radio 2
+    </div>
+  </fieldset>
+
+  <fieldset id="checkboxes">
+    <legend>Checkboxes</legend>
+      <input id="checkbox1" type="checkbox" name="g2"> Checkbox 1
+      <input id="checkbox2" type="checkbox" name="g2" checked="checked">Checkbox 2
+  </fieldset>
+
+  <fieldset id="switches">
+    <legend>Switches</legend>
+      <input id="switch1" name="g3" role="switch" type="checkbox">Switch 1
+      <input checked="checked" id="switch2" name="g3" role="switch" type="checkbox">Switch 2
+  </fieldset>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXControlSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const controlsCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(9, controlsCount, "Found 9 controls");
+
+    const controls = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const radios = getNativeInterface(accDoc, "radios");
+    const radio1 = getNativeInterface(accDoc, "radio1");
+    const radio2 = getNativeInterface(accDoc, "radio2");
+
+    is(
+      radios.getAttributeValue("AXRole"),
+      controls[0].getAttributeValue("AXRole"),
+      "Found correct group of radios"
+    );
+    is(
+      radio1.getAttributeValue("AXRole"),
+      controls[1].getAttributeValue("AXRole"),
+      "Found correct radio 1"
+    );
+    is(
+      radio2.getAttributeValue("AXRole"),
+      controls[2].getAttributeValue("AXRole"),
+      "Found correct radio 2"
+    );
+
+    const checkboxes = getNativeInterface(accDoc, "checkboxes");
+    const checkbox1 = getNativeInterface(accDoc, "checkbox1");
+    const checkbox2 = getNativeInterface(accDoc, "checkbox2");
+
+    is(
+      checkboxes.getAttributeValue("AXRole"),
+      controls[3].getAttributeValue("AXRole"),
+      "Found correct group of checkboxes"
+    );
+    is(
+      checkbox1.getAttributeValue("AXRole"),
+      controls[4].getAttributeValue("AXRole"),
+      "Found correct checkbox 1"
+    );
+    is(
+      checkbox2.getAttributeValue("AXRole"),
+      controls[5].getAttributeValue("AXRole"),
+      "Found correct checkbox 2"
+    );
+
+    const switches = getNativeInterface(accDoc, "switches");
+    const switch1 = getNativeInterface(accDoc, "switch1");
+    const switch2 = getNativeInterface(accDoc, "switch2");
+
+    is(
+      switches.getAttributeValue("AXRole"),
+      controls[6].getAttributeValue("AXRole"),
+      "Found correct group of switches"
+    );
+    is(
+      switch1.getAttributeValue("AXRole"),
+      controls[7].getAttributeValue("AXRole"),
+      "Found correct switch 1"
+    );
+    is(
+      switch2.getAttributeValue("AXRole"),
+      controls[8].getAttributeValue("AXRole"),
+      "Found correct switch 2"
+    );
+  }
+);
+
+/**
+ * Test rotor with misc controls
+ */
+addAccessibleTask(
+  `
+  <input role="spinbutton" id="spinbutton" type="number" value="25">
+
+  <details id="details">
+    <summary>Hello</summary>
+    world
+  </details>
+
+  <ul role="tree" id="tree">
+    <li role="treeitem">item1</li>
+    <li role="treeitem">item1</li>
+  </ul>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXControlSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const controlsCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(3, controlsCount, "Found 3 controls");
+
+    const controls = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const spin = getNativeInterface(accDoc, "spinbutton");
+    const details = getNativeInterface(accDoc, "details");
+    const tree = getNativeInterface(accDoc, "tree");
+
+    is(
+      spin.getAttributeValue("AXRole"),
+      controls[0].getAttributeValue("AXRole"),
+      "Found correct spinbutton"
+    );
+    is(
+      details.getAttributeValue("AXRole"),
+      controls[1].getAttributeValue("AXRole"),
+      "Found correct details element"
+    );
+    is(
+      tree.getAttributeValue("AXRole"),
+      controls[2].getAttributeValue("AXRole"),
+      "Found correct tree"
+    );
+  }
+);
+
+/**
+ * Test rotor with links
+ */
+addAccessibleTask(
+  `
+  <a href="" id="empty">empty link</a>
+  <a href="http://www.example.com/" id="href">Example link</a>
+  <a id="noHref">link without href</a>
+  `,
+  async (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXLinkSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    let linkCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(2, linkCount, "Found two links");
+
+    let links = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    const empty = getNativeInterface(accDoc, "empty");
+    const href = getNativeInterface(accDoc, "href");
+
+    is(
+      empty.getAttributeValue("AXTitle"),
+      links[0].getAttributeValue("AXTitle"),
+      "Found correct first link"
+    );
+    is(
+      href.getAttributeValue("AXTitle"),
+      links[1].getAttributeValue("AXTitle"),
+      "Found correct second link"
+    );
+
+    // unvisited links
+
+    searchPred = {
+      AXSearchKey: "AXUnvisitedLinkSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    linkCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, linkCount, "Found two links");
+
+    links = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(
+      empty.getAttributeValue("AXTitle"),
+      links[0].getAttributeValue("AXTitle"),
+      "Found correct first link"
+    );
+    is(
+      href.getAttributeValue("AXTitle"),
+      links[1].getAttributeValue("AXTitle"),
+      "Found correct second link"
+    );
+
+    // visited links
+
+    let stateChanged = waitForEvent(EVENT_STATE_CHANGE, "href");
+
+    await PlacesTestUtils.addVisits(["http://www.example.com/"]);
+
+    await stateChanged;
+
+    searchPred = {
+      AXSearchKey: "AXVisitedLinkSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    linkCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(1, linkCount, "Found one link");
+
+    links = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(
+      href.getAttributeValue("AXTitle"),
+      links[0].getAttributeValue("AXTitle"),
+      "Found correct visited link"
+    );
+
+    // Ensure history is cleared before running again
+    await PlacesUtils.history.clear();
+  }
+);
+
+/*
+ * Test AXAnyTypeSearchKey with root group
+ */
+addAccessibleTask(
+  `<h1 id="hello">hello</h1><br><h2 id="world">world</h2><br>goodbye`,
+  (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: 1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    let results = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(results.length, 1, "One result for root group");
+    is(
+      results[0].getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+
+    searchPred.AXStartElement = results[0];
+    results = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(results.length, 0, "No more results past root group");
+
+    searchPred.AXDirection = "AXDirectionPrevious";
+    results = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(
+      results.length,
+      0,
+      "Searching backwards from root group should yield no results"
+    );
+
+    const rootGroup = webArea.getAttributeValue("AXChildren")[0];
+    is(
+      rootGroup.getAttributeValue("AXIdentifier"),
+      "root-group",
+      "Is generated root group"
+    );
+
+    searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: 1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    results = rootGroup.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(
+      results[0].getAttributeValue("AXRole"),
+      "AXHeading",
+      "Is first heading child"
+    );
+  }
+);
+
+/**
+ * Test rotor with checkboxes
+ */
+addAccessibleTask(
+  `
+  <fieldset id="checkboxes">
+    <legend>Checkboxes</legend>
+      <input id="checkbox1" type="checkbox" name="g2"> Checkbox 1
+      <input id="checkbox2" type="checkbox" name="g2" checked="checked">Checkbox 2
+      <div id="checkbox3" role="checkbox">Checkbox 3</div>
+      <div id="checkbox4" role="checkbox" aria-checked="true">Checkbox 4</div>
+  </fieldset>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXCheckboxSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const checkboxCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(4, checkboxCount, "Found 4 checkboxes");
+
+    const checkboxes = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const checkbox1 = getNativeInterface(accDoc, "checkbox1");
+    const checkbox2 = getNativeInterface(accDoc, "checkbox2");
+    const checkbox3 = getNativeInterface(accDoc, "checkbox3");
+    const checkbox4 = getNativeInterface(accDoc, "checkbox4");
+
+    is(
+      checkbox1.getAttributeValue("AXValue"),
+      checkboxes[0].getAttributeValue("AXValue"),
+      "Found correct checkbox 1"
+    );
+    is(
+      checkbox2.getAttributeValue("AXValue"),
+      checkboxes[1].getAttributeValue("AXValue"),
+      "Found correct checkbox 2"
+    );
+    is(
+      checkbox3.getAttributeValue("AXValue"),
+      checkboxes[2].getAttributeValue("AXValue"),
+      "Found correct checkbox 3"
+    );
+    is(
+      checkbox4.getAttributeValue("AXValue"),
+      checkboxes[3].getAttributeValue("AXValue"),
+      "Found correct checkbox 4"
+    );
+  }
+);
+
+/**
+ * Test rotor with radiogroups
+ */
+addAccessibleTask(
+  `
+  <div role="radiogroup" id="radios" aria-labelledby="desc">
+    <h1 id="desc">some radio buttons</h1>
+    <div id="radio1" role="radio"> Radio 1</div>
+    <div id="radio2" role="radio"> Radio 2</div>
+  </div>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXRadioGroupSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const radiogroupCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(1, radiogroupCount, "Found 1 radio group");
+
+    const controls = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const radios = getNativeInterface(accDoc, "radios");
+
+    is(
+      radios.getAttributeValue("AXDescription"),
+      controls[0].getAttributeValue("AXDescription"),
+      "Found correct group of radios"
+    );
+  }
+);
+
+/*
+ * Test rotor with inputs
+ */
+addAccessibleTask(
+  `
+  <input type="text" value="I'm a text field." id="text"><br>
+  <input type="text" value="me too" id="implText"><br>
+  <textarea id="textarea">this is some text in a text area</textarea><br>
+  <input type="tel" value="0000000000" id="tel"><br>
+  <input type="url" value="https://example.com" id="url"><br>
+  <input type="email" value="hi@example.com" id="email"><br>
+  <input type="password" value="blah" id="password"><br>
+  <input type="month" value="2020-01" id="month"><br>
+  <input type="week" value="2020-W01" id="week"><br>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXTextFieldSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const textfieldCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(9, textfieldCount, "Found 9 fields");
+
+    const fields = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const text = getNativeInterface(accDoc, "text");
+    const implText = getNativeInterface(accDoc, "implText");
+    const textarea = getNativeInterface(accDoc, "textarea");
+    const tel = getNativeInterface(accDoc, "tel");
+    const url = getNativeInterface(accDoc, "url");
+    const email = getNativeInterface(accDoc, "email");
+    const password = getNativeInterface(accDoc, "password");
+    const month = getNativeInterface(accDoc, "month");
+    const week = getNativeInterface(accDoc, "week");
+
+    const toCheck = [
+      text,
+      implText,
+      textarea,
+      tel,
+      url,
+      email,
+      password,
+      month,
+      week,
+    ];
+
+    for (let i = 0; i < toCheck.length; i++) {
+      is(
+        toCheck[i].getAttributeValue("AXValue"),
+        fields[i].getAttributeValue("AXValue"),
+        "Found correct input control"
+      );
+    }
+  }
+);
+
+/**
+ * Test rotor with static text
+ */
+addAccessibleTask(
+  `
+  <h1>Hello I am a heading</h1>
+  This is some regular text.<p>this is some paragraph text</p><br>
+  This is a list:<ul>
+    <li>List item one</li>
+    <li>List item two</li>
+  </ul>
+
+  <a href="http://example.com">This is a link</a>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXStaticTextSearchKey",
+      AXImmediateDescendants: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const textCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(7, textCount, "Found 7 pieces of text");
+
+    const text = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(
+      "Hello I am a heading",
+      text[0].getAttributeValue("AXValue"),
+      "Found correct text node for heading"
+    );
+    is(
+      "This is some regular text.",
+      text[1].getAttributeValue("AXValue"),
+      "Found correct text node"
+    );
+    is(
+      "this is some paragraph text",
+      text[2].getAttributeValue("AXValue"),
+      "Found correct text node for paragraph"
+    );
+    is(
+      "This is a list:",
+      text[3].getAttributeValue("AXValue"),
+      "Found correct text node for pre-list text node"
+    );
+    is(
+      "List item one",
+      text[4].getAttributeValue("AXValue"),
+      "Found correct text node for list item one"
+    );
+    is(
+      "List item two",
+      text[5].getAttributeValue("AXValue"),
+      "Found correct text node for list item two"
+    );
+    is(
+      "This is a link",
+      text[6].getAttributeValue("AXValue"),
+      "Found correct text node for link"
+    );
+  }
+);
+
+/**
+ * Test rotor with lists
+ */
+addAccessibleTask(
+  `
+  <ul id="unordered">
+    <li>hello</li>
+    <li>world</li>
+  </ul>
+
+  <ol id="ordered">
+    <li>item one</li>
+    <li>item two</li>
+  </ol>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXListSearchKey",
+      AXImmediateDescendants: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const listCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(2, listCount, "Found 2 lists");
+
+    const lists = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    const ordered = getNativeInterface(accDoc, "ordered");
+    const unordered = getNativeInterface(accDoc, "unordered");
+
+    is(
+      unordered.getAttributeValue("AXChildren")[0].getAttributeValue("AXTitle"),
+      lists[0].getAttributeValue("AXChildren")[0].getAttributeValue("AXTitle"),
+      "Found correct unordered list"
+    );
+    is(
+      ordered.getAttributeValue("AXChildren")[0].getAttributeValue("AXTitle"),
+      lists[1].getAttributeValue("AXChildren")[0].getAttributeValue("AXTitle"),
+      "Found correct ordered list"
+    );
+  }
+);
+
+/*
+ * Test rotor with images
+ */
+addAccessibleTask(
+  `
+  <img id="img1" alt="image one" src="http://example.com/a11y/accessible/tests/mochitest/moz.png"><br>
+  <a href="http://example.com">
+    <img id="img2" alt="image two" src="http://example.com/a11y/accessible/tests/mochitest/moz.png">
+  </a>
+  <img src="" id="img3">
+  `,
+  (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXImageSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    let images = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(images.length, 3, "Found three images");
+
+    const img1 = getNativeInterface(accDoc, "img1");
+    const img2 = getNativeInterface(accDoc, "img2");
+    const img3 = getNativeInterface(accDoc, "img3");
+
+    is(
+      img1.getAttributeValue("AXDescription"),
+      images[0].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+
+    is(
+      img2.getAttributeValue("AXDescription"),
+      images[1].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+
+    is(
+      img3.getAttributeValue("AXDescription"),
+      images[2].getAttributeValue("AXDescription"),
+      "Found correct image"
+    );
+  }
+);
+
+/**
+ * Test rotor with frames
+ */
+addAccessibleTask(
+  `
+  <iframe id="frame1" src="data:text/html,<h1>hello</h1>world"></iframe>
+  <iframe id="frame2" src="data:text/html,<iframe id='frame3' src='data:text/html,<h1>goodbye</h1>'>"></iframe>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXFrameSearchKey",
+      AXImmediateDescendantsOnly: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const frameCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(3, frameCount, "Found 3 frames");
+  }
+);
+
+/**
+ * Test rotor with static text
+ */
+addAccessibleTask(
+  `
+  <h1>Hello I am a heading</h1>
+  This is some regular text.<p>this is some paragraph text</p><br>
+  This is a list:<ul>
+    <li>List item one</li>
+    <li>List item two</li>
+  </ul>
+
+  <a href="http://example.com">This is a link</a>
+  `,
+  async (browser, accDoc) => {
+    const searchPred = {
+      AXSearchKey: "AXStaticTextSearchKey",
+      AXImmediateDescendants: 0,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const textCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(7, textCount, "Found 7 pieces of text");
+
+    const text = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    is(
+      "Hello I am a heading",
+      text[0].getAttributeValue("AXValue"),
+      "Found correct text node for heading"
+    );
+    is(
+      "This is some regular text.",
+      text[1].getAttributeValue("AXValue"),
+      "Found correct text node"
+    );
+    is(
+      "this is some paragraph text",
+      text[2].getAttributeValue("AXValue"),
+      "Found correct text node for paragraph"
+    );
+    is(
+      "This is a list:",
+      text[3].getAttributeValue("AXValue"),
+      "Found correct text node for pre-list text node"
+    );
+    is(
+      "List item one",
+      text[4].getAttributeValue("AXValue"),
+      "Found correct text node for list item one"
+    );
+    is(
+      "List item two",
+      text[5].getAttributeValue("AXValue"),
+      "Found correct text node for list item two"
+    );
+    is(
+      "This is a link",
+      text[6].getAttributeValue("AXValue"),
+      "Found correct text node for link"
+    );
+  }
+);
+
+/**
+ * Test search with non-webarea root
+ */
+addAccessibleTask(
+  `
+  <div id="searchroot"><p id="p1">hello</p><p id="p2">world</p></div>
+  <div><p>goodybe</p></div>
+  `,
+  async (browser, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+    };
+
+    const searchRoot = getNativeInterface(accDoc, "searchroot");
+    const resultCount = searchRoot.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(resultCount, 2, "Found 2 items");
+
+    const p1 = getNativeInterface(accDoc, "p1");
+    searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+      AXStartElement: p1,
+    };
+
+    let results = searchRoot.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    Assert.deepEqual(
+      results.map(r => r.getAttributeValue("AXDOMIdentifier")),
+      ["p2"],
+      "Result is next group sibling"
+    );
+
+    searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXImmediateDescendantsOnly: 1,
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionPrevious",
+    };
+
+    results = searchRoot.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    Assert.deepEqual(
+      results.map(r => r.getAttributeValue("AXDOMIdentifier")),
+      ["p2", "p1"],
+      "A reverse search should return groups in reverse"
+    );
+  }
+);
+
+/**
+ * Test search text
+ */
+addAccessibleTask(
+  `
+  <p>It's about the future, isn't it?</p>
+  <p>Okay, alright, Saturday is good, Saturday's good, I could spend a week in 1955.</p>
+  <ul>
+    <li>I could hang out, you could show me around.</li>
+    <li>There's that word again, heavy.</li>
+  </ul>
+  `,
+  async (browser, f, accDoc) => {
+    let searchPred = {
+      AXSearchKey: "AXAnyTypeSearchKey",
+      AXResultsLimit: -1,
+      AXDirection: "AXDirectionNext",
+      AXSearchText: "could",
+    };
+
+    const webArea = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+    is(
+      webArea.getAttributeValue("AXRole"),
+      "AXWebArea",
+      "Got web area accessible"
+    );
+
+    const textSearchCount = webArea.getParameterizedAttributeValue(
+      "AXUIElementCountForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+    is(textSearchCount, 2, "Found 2 matching items in text search");
+
+    const results = webArea.getParameterizedAttributeValue(
+      "AXUIElementsForSearchPredicate",
+      NSDictionary(searchPred)
+    );
+
+    info(results.map(r => r.getAttributeValue("AXMozDebugDescription")));
+
+    Assert.deepEqual(
+      results.map(r => r.getAttributeValue("AXValue")),
+      [
+        "Okay, alright, Saturday is good, Saturday's good, I could spend a week in 1955.",
+        "I could hang out, you could show me around.",
+      ],
+      "Correct text search results"
+    );
+  },
+  { topLevel: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/mac/browser_selectables.js b/accessible/tests/browser/mac/browser_selectables.js
new file mode 100644
index 0000000000..29cd326bdd
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_selectables.js
@@ -0,0 +1,336 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+function getSelectedIds(selectable) {
+  return selectable
+    .getAttributeValue("AXSelectedChildren")
+    .map(c => c.getAttributeValue("AXDOMIdentifier"));
+}
+
+/**
+ * Test aria tabs
+ */
+addAccessibleTask("mac/doc_aria_tabs.html", async (browser, accDoc) => {
+  let tablist = getNativeInterface(accDoc, "tablist");
+  is(
+    tablist.getAttributeValue("AXRole"),
+    "AXTabGroup",
+    "Correct role for tablist"
+  );
+
+  let tabMacAccs = tablist.getAttributeValue("AXTabs");
+  is(tabMacAccs.length, 3, "3 items in AXTabs");
+
+  let selectedTabs = tablist.getAttributeValue("AXSelectedChildren");
+  is(selectedTabs.length, 1, "one selected tab");
+
+  let tab = selectedTabs[0];
+  is(tab.getAttributeValue("AXRole"), "AXRadioButton", "Correct role for tab");
+  is(
+    tab.getAttributeValue("AXSubrole"),
+    "AXTabButton",
+    "Correct subrole for tab"
+  );
+  is(tab.getAttributeValue("AXTitle"), "First Tab", "Correct title for tab");
+
+  let tabToSelect = tabMacAccs[1];
+  is(
+    tabToSelect.getAttributeValue("AXTitle"),
+    "Second Tab",
+    "Correct title for tab"
+  );
+
+  let actions = tabToSelect.actionNames;
+  ok(true, actions);
+  ok(actions.includes("AXPress"), "Has switch action");
+
+  let evt = waitForMacEvent("AXSelectedChildrenChanged");
+  tabToSelect.performAction("AXPress");
+  await evt;
+
+  selectedTabs = tablist.getAttributeValue("AXSelectedChildren");
+  is(selectedTabs.length, 1, "one selected tab");
+  is(
+    selectedTabs[0].getAttributeValue("AXTitle"),
+    "Second Tab",
+    "Correct title for tab"
+  );
+});
+
+addAccessibleTask('<p id="p">hello</p>', async (browser, accDoc) => {
+  let p = getNativeInterface(accDoc, "p");
+  ok(
+    p.attributeNames.includes("AXSelected"),
+    "html element includes 'AXSelected' attribute"
+  );
+  is(p.getAttributeValue("AXSelected"), 0, "AX selected is 'false'");
+});
+
+addAccessibleTask(
+  `<select id="select" aria-label="Choose a number" multiple>
+    <option id="one" selected>One</option>
+    <option id="two">Two</option>
+    <option id="three">Three</option>
+    <option id="four" disabled>Four</option>
+  </select>`,
+  async (browser, accDoc) => {
+    let select = getNativeInterface(accDoc, "select");
+    let one = getNativeInterface(accDoc, "one");
+    let two = getNativeInterface(accDoc, "two");
+    let three = getNativeInterface(accDoc, "three");
+    let four = getNativeInterface(accDoc, "four");
+
+    is(
+      select.getAttributeValue("AXTitle"),
+      "Choose a number",
+      "Select titled correctly"
+    );
+    ok(
+      select.attributeNames.includes("AXOrientation"),
+      "Have orientation attribute"
+    );
+    ok(
+      select.isAttributeSettable("AXSelectedChildren"),
+      "Select can have AXSelectedChildren set"
+    );
+
+    is(one.getAttributeValue("AXTitle"), "", "Option should not have a title");
+    is(
+      one.getAttributeValue("AXValue"),
+      "One",
+      "Option should have correct value"
+    );
+    is(
+      one.getAttributeValue("AXRole"),
+      "AXStaticText",
+      "Options should have AXStaticText role"
+    );
+    ok(one.isAttributeSettable("AXSelected"), "Option can have AXSelected set");
+
+    is(select.getAttributeValue("AXSelectedChildren").length, 1);
+    one.setAttributeValue("AXSelected", false);
+    is(select.getAttributeValue("AXSelectedChildren").length, 0);
+
+    three.setAttributeValue("AXSelected", true);
+    is(select.getAttributeValue("AXSelectedChildren").length, 1);
+    ok(getSelectedIds(select).includes("three"), "'three' is selected");
+
+    select.setAttributeValue("AXSelectedChildren", [one, two]);
+    Assert.deepEqual(
+      getSelectedIds(select),
+      ["one", "two"],
+      "one and two are selected"
+    );
+
+    select.setAttributeValue("AXSelectedChildren", [three, two, four]);
+    Assert.deepEqual(
+      getSelectedIds(select),
+      ["two", "three"],
+      "two and three are selected, four is disabled so it's not"
+    );
+
+    ok(!four.getAttributeValue("AXEnabled"), "Disabled option is disabled");
+  }
+);
+
+addAccessibleTask(
+  `<select id="select" aria-label="Choose a thing" multiple>
+    <optgroup label="Fruits">
+      <option id="banana" selected>Banana</option>
+      <option id="apple">Apple</option>
+      <option id="orange">Orange</option>
+    </optgroup>
+    <optgroup label="Vegetables">
+      <option id="lettuce" selected>Lettuce</option>
+      <option id="tomato">Tomato</option>
+      <option id="onion">Onion</option>
+    </optgroup>
+    <optgroup label="Spices">
+      <option id="cumin">Cumin</option>
+      <option id="coriander">Coriander</option>
+      <option id="allspice" selected>Allspice</option>
+    </optgroup>
+    <option id="everything">Everything</option>
+  </select>`,
+  async (browser, accDoc) => {
+    let select = getNativeInterface(accDoc, "select");
+
+    is(
+      select.getAttributeValue("AXTitle"),
+      "Choose a thing",
+      "Select titled correctly"
+    );
+    ok(
+      select.attributeNames.includes("AXOrientation"),
+      "Have orientation attribute"
+    );
+    ok(
+      select.isAttributeSettable("AXSelectedChildren"),
+      "Select can have AXSelectedChildren set"
+    );
+    let childValueSelectablePairs = select
+      .getAttributeValue("AXChildren")
+      .map(c => [
+        c.getAttributeValue("AXValue"),
+        c.isAttributeSettable("AXSelected"),
+        c.getAttributeValue("AXEnabled"),
+      ]);
+    Assert.deepEqual(
+      childValueSelectablePairs,
+      [
+        ["Fruits", false, false],
+        ["Banana", true, true],
+        ["Apple", true, true],
+        ["Orange", true, true],
+        ["Vegetables", false, false],
+        ["Lettuce", true, true],
+        ["Tomato", true, true],
+        ["Onion", true, true],
+        ["Spices", false, false],
+        ["Cumin", true, true],
+        ["Coriander", true, true],
+        ["Allspice", true, true],
+        ["Everything", true, true],
+      ],
+      "Options are selectable, group labels are not"
+    );
+
+    let allspice = getNativeInterface(accDoc, "allspice");
+    is(
+      allspice.getAttributeValue("AXTitle"),
+      "",
+      "Option should not have a title"
+    );
+    is(
+      allspice.getAttributeValue("AXValue"),
+      "Allspice",
+      "Option should have a value"
+    );
+    is(
+      allspice.getAttributeValue("AXRole"),
+      "AXStaticText",
+      "Options should have AXStaticText role"
+    );
+    ok(
+      allspice.isAttributeSettable("AXSelected"),
+      "Option can have AXSelected set"
+    );
+    is(
+      allspice
+        .getAttributeValue("AXParent")
+        .getAttributeValue("AXDOMIdentifier"),
+      "select",
+      "Select is direct parent of nested option"
+    );
+
+    let groupLabel = select.getAttributeValue("AXChildren")[0];
+    ok(
+      !groupLabel.isAttributeSettable("AXSelected"),
+      "Group label should not be selectable"
+    );
+    is(
+      groupLabel.getAttributeValue("AXValue"),
+      "Fruits",
+      "Group label should have a value"
+    );
+    is(
+      groupLabel.getAttributeValue("AXTitle"),
+      null,
+      "Group label should not have a title"
+    );
+    is(
+      groupLabel.getAttributeValue("AXRole"),
+      "AXStaticText",
+      "Group label should have AXStaticText role"
+    );
+    is(
+      groupLabel
+        .getAttributeValue("AXParent")
+        .getAttributeValue("AXDOMIdentifier"),
+      "select",
+      "Select is direct parent of group label"
+    );
+
+    Assert.deepEqual(getSelectedIds(select), ["banana", "lettuce", "allspice"]);
+  }
+);
+
+addAccessibleTask(
+  `<div role="listbox" id="select" aria-label="Choose a number" aria-multiselectable="true">
+    <div role="option" id="one" aria-selected="true">One</div>
+    <div role="option" id="two">Two</div>
+    <div role="option" id="three">Three</div>
+    <div role="option" id="four" aria-disabled="true">Four</div>
+</div>`,
+  async (browser, accDoc) => {
+    let select = getNativeInterface(accDoc, "select");
+    let one = getNativeInterface(accDoc, "one");
+    let two = getNativeInterface(accDoc, "two");
+    let three = getNativeInterface(accDoc, "three");
+    let four = getNativeInterface(accDoc, "four");
+
+    is(
+      select.getAttributeValue("AXTitle"),
+      "Choose a number",
+      "Select titled correctly"
+    );
+    ok(
+      select.attributeNames.includes("AXOrientation"),
+      "Have orientation attribute"
+    );
+    ok(
+      select.isAttributeSettable("AXSelectedChildren"),
+      "Select can have AXSelectedChildren set"
+    );
+
+    is(one.getAttributeValue("AXTitle"), "", "Option should not have a title");
+    is(
+      one.getAttributeValue("AXValue"),
+      "One",
+      "Option should have correct value"
+    );
+    is(
+      one.getAttributeValue("AXRole"),
+      "AXStaticText",
+      "Options should have AXStaticText role"
+    );
+    ok(one.isAttributeSettable("AXSelected"), "Option can have AXSelected set");
+
+    is(select.getAttributeValue("AXSelectedChildren").length, 1);
+    let evt = waitForMacEvent("AXSelectedChildrenChanged");
+    // Change selection from content.
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("one").removeAttribute("aria-selected");
+    });
+    await evt;
+    is(select.getAttributeValue("AXSelectedChildren").length, 0);
+
+    three.setAttributeValue("AXSelected", true);
+    is(select.getAttributeValue("AXSelectedChildren").length, 1);
+    ok(getSelectedIds(select).includes("three"), "'three' is selected");
+
+    select.setAttributeValue("AXSelectedChildren", [one, two]);
+    Assert.deepEqual(
+      getSelectedIds(select),
+      ["one", "two"],
+      "one and two are selected"
+    );
+
+    select.setAttributeValue("AXSelectedChildren", [three, two, four]);
+    Assert.deepEqual(
+      getSelectedIds(select),
+      ["two", "three"],
+      "two and three are selected, four is disabled so it's not"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_table.js b/accessible/tests/browser/mac/browser_table.js
new file mode 100644
index 0000000000..34aeb87a17
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_table.js
@@ -0,0 +1,281 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+/* import-globals-from ../../mochitest/attributes.js */
+loadScripts({ name: "attributes.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Helper function to test table consistency.
+ */
+function testTableConsistency(table, expectedRowCount, expectedColumnCount) {
+  is(table.getAttributeValue("AXRole"), "AXTable", "Correct role for table");
+
+  let tableChildren = table.getAttributeValue("AXChildren");
+  // XXX: Should be expectedRowCount+ExpectedColumnCount+1 children, rows (incl headers) + cols + headers
+  // if we're trying to match Safari.
+  is(
+    tableChildren.length,
+    expectedRowCount + expectedColumnCount,
+    "Table has children = rows (4) + cols (3)"
+  );
+  for (let i = 0; i < tableChildren.length; i++) {
+    let currChild = tableChildren[i];
+    if (i < expectedRowCount) {
+      is(
+        currChild.getAttributeValue("AXRole"),
+        "AXRow",
+        "Correct role for row"
+      );
+    } else {
+      is(
+        currChild.getAttributeValue("AXRole"),
+        "AXColumn",
+        "Correct role for col"
+      );
+      is(
+        currChild.getAttributeValue("AXRoleDescription"),
+        "column",
+        "Correct role desc for col"
+      );
+    }
+  }
+
+  is(
+    table.getAttributeValue("AXColumnCount"),
+    expectedColumnCount,
+    "Table has correct column count."
+  );
+  is(
+    table.getAttributeValue("AXRowCount"),
+    expectedRowCount,
+    "Table has correct row count."
+  );
+
+  let cols = table.getAttributeValue("AXColumns");
+  is(cols.length, expectedColumnCount, "Table has col list of correct length");
+  for (let i = 0; i < cols.length; i++) {
+    let currCol = cols[i];
+    let currChildren = currCol.getAttributeValue("AXChildren");
+    is(
+      currChildren.length,
+      expectedRowCount,
+      "Column has correct number of cells"
+    );
+    for (let j = 0; j < currChildren.length; j++) {
+      let currChild = currChildren[j];
+      is(
+        currChild.getAttributeValue("AXRole"),
+        "AXCell",
+        "Column child is cell"
+      );
+    }
+  }
+
+  let rows = table.getAttributeValue("AXRows");
+  is(rows.length, expectedRowCount, "Table has row list of correct length");
+  for (let i = 0; i < rows.length; i++) {
+    let currRow = rows[i];
+    let currChildren = currRow.getAttributeValue("AXChildren");
+    is(
+      currChildren.length,
+      expectedColumnCount,
+      "Row has correct number of cells"
+    );
+    for (let j = 0; j < currChildren.length; j++) {
+      let currChild = currChildren[j];
+      is(currChild.getAttributeValue("AXRole"), "AXCell", "Row child is cell");
+    }
+  }
+}
+
+/**
+ * Test table, columns, rows
+ */
+addAccessibleTask(
+  `<table id="customers">
+    <tbody>
+      <tr id="firstrow"><th>Company</th><th>Contact</th><th>Country</th></tr>
+      <tr><td>Alfreds Futterkiste</td><td>Maria Anders</td><td>Germany</td></tr>
+      <tr><td>Centro comercial Moctezuma</td><td>Francisco Chang</td><td>Mexico</td></tr>
+      <tr><td>Ernst Handel</td><td>Roland Mendel</td><td>Austria</td></tr>
+    </tbody>
+  </table>`,
+  async (browser, accDoc) => {
+    let table = getNativeInterface(accDoc, "customers");
+    testTableConsistency(table, 4, 3);
+
+    const rowText = [
+      "Madrigal Electromotive GmbH",
+      "Lydia Rodarte-Quayle",
+      "Germany",
+    ];
+    let reorder = waitForEvent(EVENT_REORDER, "customers");
+    await SpecialPowers.spawn(browser, [rowText], _rowText => {
+      let tr = content.document.createElement("tr");
+      for (let t of _rowText) {
+        let td = content.document.createElement("td");
+        td.textContent = t;
+        tr.appendChild(td);
+      }
+      content.document.getElementById("customers").appendChild(tr);
+    });
+    await reorder;
+
+    let cols = table.getAttributeValue("AXColumns");
+    is(cols.length, 3, "Table has col list of correct length");
+    for (let i = 0; i < cols.length; i++) {
+      let currCol = cols[i];
+      let currChildren = currCol.getAttributeValue("AXChildren");
+      is(currChildren.length, 5, "Column has correct number of cells");
+      let lastCell = currChildren[currChildren.length - 1];
+      let cellChildren = lastCell.getAttributeValue("AXChildren");
+      is(cellChildren.length, 1, "Cell has a single text child");
+      is(
+        cellChildren[0].getAttributeValue("AXRole"),
+        "AXStaticText",
+        "Correct role for cell child"
+      );
+      is(
+        cellChildren[0].getAttributeValue("AXValue"),
+        rowText[i],
+        "Correct text for cell"
+      );
+    }
+
+    reorder = waitForEvent(EVENT_REORDER, "firstrow");
+    await SpecialPowers.spawn(browser, [], () => {
+      let td = content.document.createElement("td");
+      td.textContent = "Ticker";
+      content.document.getElementById("firstrow").appendChild(td);
+    });
+    await reorder;
+
+    cols = table.getAttributeValue("AXColumns");
+    is(cols.length, 4, "Table has col list of correct length");
+    is(
+      cols[cols.length - 1].getAttributeValue("AXChildren").length,
+      1,
+      "Last column has single child"
+    );
+  }
+);
+
+addAccessibleTask(
+  `<table id="table">
+    <tr>
+      <th colspan="2" id="header1">Header 1</th>
+      <th id="header2">Header 2</th>
+    </tr>
+    <tr>
+      <td id="cell1">one</td>
+      <td id="cell2" rowspan="2">two</td>
+      <td id="cell3">three</td>
+    </tr>
+    <tr>
+    <td id="cell4">four</td>
+    <td id="cell5">five</td>
+  </tr>
+  </table>`,
+  (browser, accDoc) => {
+    let table = getNativeInterface(accDoc, "table");
+
+    let getCellAt = (col, row) =>
+      table.getParameterizedAttributeValue("AXCellForColumnAndRow", [col, row]);
+
+    function testCell(cell, expectedId, expectedColRange, expectedRowRange) {
+      is(
+        cell.getAttributeValue("AXDOMIdentifier"),
+        expectedId,
+        "Correct DOM Identifier"
+      );
+      Assert.deepEqual(
+        cell.getAttributeValue("AXColumnIndexRange"),
+        expectedColRange,
+        "Correct column range"
+      );
+      Assert.deepEqual(
+        cell.getAttributeValue("AXRowIndexRange"),
+        expectedRowRange,
+        "Correct row range"
+      );
+    }
+
+    testCell(getCellAt(0, 0), "header1", [0, 2], [0, 1]);
+    testCell(getCellAt(1, 0), "header1", [0, 2], [0, 1]);
+    testCell(getCellAt(2, 0), "header2", [2, 1], [0, 1]);
+
+    testCell(getCellAt(0, 1), "cell1", [0, 1], [1, 1]);
+    testCell(getCellAt(1, 1), "cell2", [1, 1], [1, 2]);
+    testCell(getCellAt(2, 1), "cell3", [2, 1], [1, 1]);
+
+    testCell(getCellAt(0, 2), "cell4", [0, 1], [2, 1]);
+    testCell(getCellAt(1, 2), "cell2", [1, 1], [1, 2]);
+    testCell(getCellAt(2, 2), "cell5", [2, 1], [2, 1]);
+
+    let colHeaders = table.getAttributeValue("AXColumnHeaderUIElements");
+    Assert.deepEqual(
+      colHeaders.map(c => c.getAttributeValue("AXDOMIdentifier")),
+      ["header1", "header1", "header2"],
+      "Correct column headers"
+    );
+  }
+);
+
+addAccessibleTask(
+  `<table id="table">
+    <tr>
+      <td>Foo</td>
+    </tr>
+  </table>`,
+  (browser, accDoc) => {
+    // Make sure we guess this table to be a layout table.
+    testAttrs(
+      findAccessibleChildByID(accDoc, "table"),
+      { "layout-guess": "true" },
+      true
+    );
+
+    let table = getNativeInterface(accDoc, "table");
+    is(
+      table.getAttributeValue("AXRole"),
+      "AXGroup",
+      "Correct role (AXGroup) for layout table"
+    );
+
+    let children = table.getAttributeValue("AXChildren");
+    is(
+      children.length,
+      1,
+      "Layout table has single child (no additional columns)"
+    );
+  }
+);
+
+addAccessibleTask(
+  `<div id="table" role="table">
+    <span style="display: block;">
+      <div role="row">
+        <div role="cell">Cell 1</div>
+        <div role="cell">Cell 2</div>
+      </div>
+    </span>
+    <span style="display: block;">
+      <div role="row">
+        <span style="display: block;">
+          <div role="cell">Cell 3</div>
+          <div role="cell">Cell 4</div>
+        </span>
+      </div>
+    </span>
+  </div>`,
+  async (browser, accDoc) => {
+    let table = getNativeInterface(accDoc, "table");
+    testTableConsistency(table, 2, 2);
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_text_basics.js b/accessible/tests/browser/mac/browser_text_basics.js
new file mode 100644
index 0000000000..de66ebf639
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_text_basics.js
@@ -0,0 +1,282 @@
+/* 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";
+
+function testRangeAtMarker(macDoc, marker, attribute, expected, msg) {
+  let range = macDoc.getParameterizedAttributeValue(attribute, marker);
+  is(stringForRange(macDoc, range), expected, msg);
+}
+
+function testUIElement(
+  macDoc,
+  marker,
+  msg,
+  expectedRole,
+  expectedValue,
+  expectedRange
+) {
+  let elem = macDoc.getParameterizedAttributeValue(
+    "AXUIElementForTextMarker",
+    marker
+  );
+  is(
+    elem.getAttributeValue("AXRole"),
+    expectedRole,
+    `${msg}: element role matches`
+  );
+  is(elem.getAttributeValue("AXValue"), expectedValue, `${msg}: element value`);
+  let elemRange = macDoc.getParameterizedAttributeValue(
+    "AXTextMarkerRangeForUIElement",
+    elem
+  );
+  is(
+    stringForRange(macDoc, elemRange),
+    expectedRange,
+    `${msg}: element range matches element value`
+  );
+}
+
+function testStyleRun(macDoc, marker, msg, expectedStyleRun) {
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXStyleTextMarkerRangeForTextMarker",
+    expectedStyleRun,
+    `${msg}: style run matches`
+  );
+}
+
+function testParagraph(macDoc, marker, msg, expectedParagraph) {
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXParagraphTextMarkerRangeForTextMarker",
+    expectedParagraph,
+    `${msg}: paragraph matches`
+  );
+}
+
+function testWords(macDoc, marker, msg, expectedLeft, expectedRight) {
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXLeftWordTextMarkerRangeForTextMarker",
+    expectedLeft,
+    `${msg}: left word matches`
+  );
+
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXRightWordTextMarkerRangeForTextMarker",
+    expectedRight,
+    `${msg}: right word matches`
+  );
+}
+
+function testLines(
+  macDoc,
+  marker,
+  msg,
+  expectedLine,
+  expectedLeft,
+  expectedRight
+) {
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXLineTextMarkerRangeForTextMarker",
+    expectedLine,
+    `${msg}: line matches`
+  );
+
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXLeftLineTextMarkerRangeForTextMarker",
+    expectedLeft,
+    `${msg}: left line matches`
+  );
+
+  testRangeAtMarker(
+    macDoc,
+    marker,
+    "AXRightLineTextMarkerRangeForTextMarker",
+    expectedRight,
+    `${msg}: right line matches`
+  );
+}
+
+// Tests consistency in text markers between:
+// 1. "Linked list" forward navagation
+// 2. Getting markers by index
+// 3. "Linked list" reverse navagation
+// For each iteration method check that the returned index is consistent
+function testMarkerIntegrity(accDoc, expectedMarkerValues) {
+  let macDoc = accDoc.nativeInterface.QueryInterface(
+    Ci.nsIAccessibleMacInterface
+  );
+
+  let count = 0;
+
+  // Iterate forward with "AXNextTextMarkerForTextMarker"
+  let marker = macDoc.getAttributeValue("AXStartTextMarker");
+  while (marker) {
+    let index = macDoc.getParameterizedAttributeValue(
+      "AXIndexForTextMarker",
+      marker
+    );
+    is(
+      index,
+      count,
+      `Correct index in "AXNextTextMarkerForTextMarker": ${count}`
+    );
+
+    testWords(
+      macDoc,
+      marker,
+      `At index ${count}`,
+      ...expectedMarkerValues[count].words
+    );
+    testLines(
+      macDoc,
+      marker,
+      `At index ${count}`,
+      ...expectedMarkerValues[count].lines
+    );
+    testUIElement(
+      macDoc,
+      marker,
+      `At index ${count}`,
+      ...expectedMarkerValues[count].element
+    );
+    testParagraph(
+      macDoc,
+      marker,
+      `At index ${count}`,
+      expectedMarkerValues[count].paragraph
+    );
+    testStyleRun(
+      macDoc,
+      marker,
+      `At index ${count}`,
+      expectedMarkerValues[count].style
+    );
+
+    let prevMarker = marker;
+    marker = macDoc.getParameterizedAttributeValue(
+      "AXNextTextMarkerForTextMarker",
+      marker
+    );
+
+    if (marker) {
+      let range = macDoc.getParameterizedAttributeValue(
+        "AXTextMarkerRangeForUnorderedTextMarkers",
+        [prevMarker, marker]
+      );
+      is(
+        macDoc.getParameterizedAttributeValue(
+          "AXLengthForTextMarkerRange",
+          range
+        ),
+        1,
+        "marker moved one character"
+      );
+    }
+
+    count++;
+  }
+
+  // Use "AXTextMarkerForIndex" to retrieve all text markers
+  for (let i = 0; i < count; i++) {
+    marker = macDoc.getParameterizedAttributeValue("AXTextMarkerForIndex", i);
+    let index = macDoc.getParameterizedAttributeValue(
+      "AXIndexForTextMarker",
+      marker
+    );
+    is(index, i, `Correct index in "AXTextMarkerForIndex": ${i}`);
+  }
+
+  ok(
+    !macDoc.getParameterizedAttributeValue(
+      "AXNextTextMarkerForTextMarker",
+      marker
+    ),
+    "Iterated through all markers"
+  );
+
+  // Iterate backward with "AXPreviousTextMarkerForTextMarker"
+  marker = macDoc.getAttributeValue("AXEndTextMarker");
+  while (marker) {
+    count--;
+    let index = macDoc.getParameterizedAttributeValue(
+      "AXIndexForTextMarker",
+      marker
+    );
+    is(
+      index,
+      count,
+      `Correct index in "AXPreviousTextMarkerForTextMarker": ${count}`
+    );
+    marker = macDoc.getParameterizedAttributeValue(
+      "AXPreviousTextMarkerForTextMarker",
+      marker
+    );
+  }
+
+  is(count, 0, "Iterated backward through all text markers");
+}
+
+addAccessibleTask("mac/doc_textmarker_test.html", async (browser, accDoc) => {
+  const expectedMarkerValues = await SpecialPowers.spawn(
+    browser,
+    [],
+    async () => {
+      return content.wrappedJSObject.EXPECTED;
+    }
+  );
+
+  testMarkerIntegrity(accDoc, expectedMarkerValues);
+});
+
+// Test text marker lesser-than operator
+addAccessibleTask(
+  `<p id="p">hello <a id="a" href="#">goodbye</a> world</p>`,
+  async (browser, accDoc) => {
+    let macDoc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    let start = macDoc.getParameterizedAttributeValue(
+      "AXTextMarkerForIndex",
+      1
+    );
+    let end = macDoc.getParameterizedAttributeValue("AXTextMarkerForIndex", 10);
+
+    let range = macDoc.getParameterizedAttributeValue(
+      "AXTextMarkerRangeForUnorderedTextMarkers",
+      [end, start]
+    );
+    is(stringForRange(macDoc, range), "ello good");
+  }
+);
+
+addAccessibleTask(
+  `<input id="input" value=""><a href="#">goodbye</a>`,
+  async (browser, accDoc) => {
+    let macDoc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    let input = getNativeInterface(accDoc, "input");
+
+    let range = macDoc.getParameterizedAttributeValue(
+      "AXTextMarkerRangeForUIElement",
+      input
+    );
+
+    is(stringForRange(macDoc, range), "", "string value is correct");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_text_input.js b/accessible/tests/browser/mac/browser_text_input.js
new file mode 100644
index 0000000000..b5aa9511a1
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_text_input.js
@@ -0,0 +1,412 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+function testValueChangedEventData(
+  macIface,
+  data,
+  expectedId,
+  expectedChangeValue,
+  expectedEditType,
+  expectedWordAtLeft
+) {
+  is(
+    data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier"),
+    expectedId,
+    "Correct AXTextChangeElement"
+  );
+  is(
+    data.AXTextStateChangeType,
+    AXTextStateChangeTypeEdit,
+    "Correct AXTextStateChangeType"
+  );
+
+  let changeValues = data.AXTextChangeValues;
+  is(changeValues.length, 1, "One element in AXTextChangeValues");
+  is(
+    changeValues[0].AXTextChangeValue,
+    expectedChangeValue,
+    "Correct AXTextChangeValue"
+  );
+  is(
+    changeValues[0].AXTextEditType,
+    expectedEditType,
+    "Correct AXTextEditType"
+  );
+
+  let textMarker = changeValues[0].AXTextChangeValueStartMarker;
+  ok(textMarker, "There is a AXTextChangeValueStartMarker");
+  let range = macIface.getParameterizedAttributeValue(
+    "AXLeftWordTextMarkerRangeForTextMarker",
+    textMarker
+  );
+  let str = macIface.getParameterizedAttributeValue(
+    "AXStringForTextMarkerRange",
+    range,
+    "correct word before caret"
+  );
+  is(str, expectedWordAtLeft);
+}
+
+// Return true if the first given object a subset of the second
+function isSubset(subset, superset) {
+  if (typeof subset != "object" || typeof superset != "object") {
+    return superset == subset;
+  }
+
+  for (let [prop, val] of Object.entries(subset)) {
+    if (!isSubset(val, superset[prop])) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function matchWebArea(expectedId, expectedInfo) {
+  return (iface, data) => {
+    if (!data) {
+      return false;
+    }
+
+    let textChangeElemID = data.AXTextChangeElement.getAttributeValue(
+      "AXDOMIdentifier"
+    );
+
+    return (
+      iface.getAttributeValue("AXRole") == "AXWebArea" &&
+      textChangeElemID == expectedId &&
+      isSubset(expectedInfo, data)
+    );
+  };
+}
+
+function matchInput(expectedId, expectedInfo) {
+  return (iface, data) => {
+    if (!data) {
+      return false;
+    }
+
+    return (
+      iface.getAttributeValue("AXDOMIdentifier") == expectedId &&
+      isSubset(expectedInfo, data)
+    );
+  };
+}
+
+async function synthKeyAndTestSelectionChanged(
+  synthKey,
+  synthEvent,
+  expectedId,
+  expectedSelectionString,
+  expectedSelectionInfo
+) {
+  let selectionChangedEvents = Promise.all([
+    waitForMacEventWithInfo(
+      "AXSelectedTextChanged",
+      matchWebArea(expectedId, expectedSelectionInfo)
+    ),
+    waitForMacEventWithInfo(
+      "AXSelectedTextChanged",
+      matchInput(expectedId, expectedSelectionInfo)
+    ),
+  ]);
+
+  EventUtils.synthesizeKey(synthKey, synthEvent);
+  let [webareaEvent, inputEvent] = await selectionChangedEvents;
+  is(
+    inputEvent.data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier"),
+    expectedId,
+    "Correct AXTextChangeElement"
+  );
+
+  let rangeString = inputEvent.macIface.getParameterizedAttributeValue(
+    "AXStringForTextMarkerRange",
+    inputEvent.data.AXSelectedTextMarkerRange
+  );
+  is(
+    rangeString,
+    expectedSelectionString,
+    `selection has correct value (${expectedSelectionString})`
+  );
+
+  is(
+    webareaEvent.macIface.getAttributeValue("AXDOMIdentifier"),
+    "body",
+    "Input event target is top-level WebArea"
+  );
+  rangeString = webareaEvent.macIface.getParameterizedAttributeValue(
+    "AXStringForTextMarkerRange",
+    inputEvent.data.AXSelectedTextMarkerRange
+  );
+  is(
+    rangeString,
+    expectedSelectionString,
+    `selection has correct value (${expectedSelectionString}) via top document`
+  );
+}
+
+async function synthKeyAndTestValueChanged(
+  synthKey,
+  synthEvent,
+  expectedId,
+  expectedTextSelectionId,
+  expectedChangeValue,
+  expectedEditType,
+  expectedWordAtLeft
+) {
+  let valueChangedEvents = Promise.all([
+    waitForMacEvent(
+      "AXSelectedTextChanged",
+      matchWebArea(expectedTextSelectionId, {
+        AXTextStateChangeType: AXTextStateChangeTypeSelectionMove,
+      })
+    ),
+    waitForMacEvent(
+      "AXSelectedTextChanged",
+      matchInput(expectedTextSelectionId, {
+        AXTextStateChangeType: AXTextStateChangeTypeSelectionMove,
+      })
+    ),
+    waitForMacEventWithInfo(
+      "AXValueChanged",
+      matchWebArea(expectedId, {
+        AXTextStateChangeType: AXTextStateChangeTypeEdit,
+        AXTextChangeValues: [
+          {
+            AXTextChangeValue: expectedChangeValue,
+            AXTextEditType: expectedEditType,
+          },
+        ],
+      })
+    ),
+    waitForMacEventWithInfo(
+      "AXValueChanged",
+      matchInput(expectedId, {
+        AXTextStateChangeType: AXTextStateChangeTypeEdit,
+        AXTextChangeValues: [
+          {
+            AXTextChangeValue: expectedChangeValue,
+            AXTextEditType: expectedEditType,
+          },
+        ],
+      })
+    ),
+  ]);
+
+  EventUtils.synthesizeKey(synthKey, synthEvent);
+  let [, , webareaEvent, inputEvent] = await valueChangedEvents;
+
+  testValueChangedEventData(
+    webareaEvent.macIface,
+    webareaEvent.data,
+    expectedId,
+    expectedChangeValue,
+    expectedEditType,
+    expectedWordAtLeft
+  );
+  testValueChangedEventData(
+    inputEvent.macIface,
+    inputEvent.data,
+    expectedId,
+    expectedChangeValue,
+    expectedEditType,
+    expectedWordAtLeft
+  );
+}
+
+async function focusIntoInputAndType(accDoc, inputId, innerContainerId) {
+  let selectionId = innerContainerId ? innerContainerId : inputId;
+  let input = getNativeInterface(accDoc, inputId);
+  ok(!input.getAttributeValue("AXFocused"), "input is not focused");
+  ok(input.isAttributeSettable("AXFocused"), "input is focusable");
+  let events = Promise.all([
+    waitForMacEvent(
+      "AXFocusedUIElementChanged",
+      iface => iface.getAttributeValue("AXDOMIdentifier") == inputId
+    ),
+    waitForMacEventWithInfo(
+      "AXSelectedTextChanged",
+      matchWebArea(selectionId, {
+        AXTextStateChangeType: AXTextStateChangeTypeSelectionMove,
+      })
+    ),
+    waitForMacEventWithInfo(
+      "AXSelectedTextChanged",
+      matchInput(selectionId, {
+        AXTextStateChangeType: AXTextStateChangeTypeSelectionMove,
+      })
+    ),
+  ]);
+  input.setAttributeValue("AXFocused", true);
+  await events;
+
+  async function testTextInput(
+    synthKey,
+    expectedChangeValue,
+    expectedWordAtLeft
+  ) {
+    await synthKeyAndTestValueChanged(
+      synthKey,
+      null,
+      inputId,
+      selectionId,
+      expectedChangeValue,
+      AXTextEditTypeTyping,
+      expectedWordAtLeft
+    );
+  }
+
+  await testTextInput("h", "h", "h");
+  await testTextInput("e", "e", "he");
+  await testTextInput("l", "l", "hel");
+  await testTextInput("l", "l", "hell");
+  await testTextInput("o", "o", "hello");
+  await testTextInput(" ", " ", "hello");
+  // You would expect this to be useless but this is what VO
+  // consumes. I guess it concats the inserted text data to the
+  // word to the left of the marker.
+  await testTextInput("w", "w", " ");
+  await testTextInput("o", "o", "wo");
+  await testTextInput("r", "r", "wor");
+  await testTextInput("l", "l", "worl");
+  await testTextInput("d", "d", "world");
+
+  async function testTextDelete(expectedChangeValue, expectedWordAtLeft) {
+    await synthKeyAndTestValueChanged(
+      "KEY_Backspace",
+      null,
+      inputId,
+      selectionId,
+      expectedChangeValue,
+      AXTextEditTypeDelete,
+      expectedWordAtLeft
+    );
+  }
+
+  await testTextDelete("d", "worl");
+  await testTextDelete("l", "wor");
+
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowLeft",
+    null,
+    selectionId,
+    "",
+    {
+      AXTextStateChangeType: AXTextStateChangeTypeSelectionMove,
+      AXTextSelectionDirection: AXTextSelectionDirectionPrevious,
+      AXTextSelectionGranularity: AXTextSelectionGranularityCharacter,
+    }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowLeft",
+    { shiftKey: true },
+    selectionId,
+    "o",
+    {
+      AXTextStateChangeType: AXTextStateChangeTypeSelectionExtend,
+      AXTextSelectionDirection: AXTextSelectionDirectionPrevious,
+      AXTextSelectionGranularity: AXTextSelectionGranularityCharacter,
+    }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowLeft",
+    { shiftKey: true },
+    selectionId,
+    "wo",
+    {
+      AXTextStateChangeType: AXTextStateChangeTypeSelectionExtend,
+      AXTextSelectionDirection: AXTextSelectionDirectionPrevious,
+      AXTextSelectionGranularity: AXTextSelectionGranularityCharacter,
+    }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowLeft",
+    null,
+    selectionId,
+    "",
+    { AXTextStateChangeType: AXTextStateChangeTypeSelectionMove }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_Home",
+    { shiftKey: true },
+    selectionId,
+    "hello ",
+    {
+      AXTextStateChangeType: AXTextStateChangeTypeSelectionExtend,
+      AXTextSelectionDirection: AXTextSelectionDirectionPrevious,
+      AXTextSelectionGranularity: AXTextSelectionGranularityWord,
+    }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowLeft",
+    null,
+    selectionId,
+    "",
+    { AXTextStateChangeType: AXTextStateChangeTypeSelectionMove }
+  );
+  await synthKeyAndTestSelectionChanged(
+    "KEY_ArrowRight",
+    { shiftKey: true, altKey: true },
+    selectionId,
+    "hello",
+    {
+      AXTextStateChangeType: AXTextStateChangeTypeSelectionExtend,
+      AXTextSelectionDirection: AXTextSelectionDirectionNext,
+      AXTextSelectionGranularity: AXTextSelectionGranularityWord,
+    }
+  );
+}
+
+// Test text input
+addAccessibleTask(
+  `<a href="#">link</a> <input id="input">`,
+  async (browser, accDoc) => {
+    await focusIntoInputAndType(accDoc, "input");
+  }
+);
+
+// Test content editable
+addAccessibleTask(
+  `<div id="input" contentEditable="true" tabindex="0" role="textbox" aria-multiline="true"><div id="inner"><br /></div></div>`,
+  async (browser, accDoc) => {
+    const inner = getNativeInterface(accDoc, "inner");
+    const editableAncestor = inner.getAttributeValue("AXEditableAncestor");
+    is(
+      editableAncestor.getAttributeValue("AXDOMIdentifier"),
+      "input",
+      "Editable ancestor is input"
+    );
+    await focusIntoInputAndType(accDoc, "input");
+  }
+);
+
+// Test text input in iframe
+addAccessibleTask(
+  `<a href="#">link</a> <input id="input">`,
+  async (browser, accDoc) => {
+    await focusIntoInputAndType(accDoc, "input");
+  },
+  { iframe: true }
+);
+
+// Test input that gets role::EDITCOMBOBOX
+addAccessibleTask(`<input type="text" id="box">`, async (browser, accDoc) => {
+  const box = getNativeInterface(accDoc, "box");
+  const editableAncestor = box.getAttributeValue("AXEditableAncestor");
+  is(
+    editableAncestor.getAttributeValue("AXDOMIdentifier"),
+    "box",
+    "Editable ancestor is box itself"
+  );
+  await focusIntoInputAndType(accDoc, "box");
+});
diff --git a/accessible/tests/browser/mac/browser_text_leaf.js b/accessible/tests/browser/mac/browser_text_leaf.js
new file mode 100644
index 0000000000..c7c7a5c319
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_text_leaf.js
@@ -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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+/**
+ * Test accessibles aren't created for linebreaks.
+ */
+addAccessibleTask(`hello<br>world`, async (browser, accDoc) => {
+  let doc = accDoc.nativeInterface.QueryInterface(Ci.nsIAccessibleMacInterface);
+  let docChildren = doc.getAttributeValue("AXChildren");
+  is(docChildren.length, 1, "The document contains a root group");
+
+  let rootGroup = docChildren[0];
+  let children = rootGroup.getAttributeValue("AXChildren");
+  is(docChildren.length, 1, "The root group contains 2 children");
+
+  // verify first child is correct
+  is(
+    children[0].getAttributeValue("AXRole"),
+    "AXStaticText",
+    "First child is a text node"
+  );
+  is(
+    children[0].getAttributeValue("AXValue"),
+    "hello",
+    "First child is hello text"
+  );
+
+  // verify second child is correct
+  is(
+    children[1].getAttributeValue("AXRole"),
+    "AXStaticText",
+    "Second child is a text node"
+  );
+
+  is(
+    children[1].getAttributeValue("AXValue"),
+    "world ",
+    "Second child is world text"
+  );
+  // we have a trailing space here due to bug 1577028
+});
+
+addAccessibleTask(
+  `<p id="p">hello, this is a test</p>`,
+  async (browser, accDoc) => {
+    let p = getNativeInterface(accDoc, "p");
+    let textLeaf = p.getAttributeValue("AXChildren")[0];
+    ok(textLeaf, "paragraph has a text leaf");
+
+    let str = textLeaf.getParameterizedAttributeValue(
+      "AXStringForRange",
+      NSRange(3, 6)
+    );
+
+    is(str, "lo, this ", "AXStringForRange matches.");
+
+    let smallBounds = textLeaf.getParameterizedAttributeValue(
+      "AXBoundsForRange",
+      NSRange(3, 6)
+    );
+
+    let largeBounds = textLeaf.getParameterizedAttributeValue(
+      "AXBoundsForRange",
+      NSRange(3, 8)
+    );
+
+    ok(smallBounds.size[0] < largeBounds.size[0], "longer range is wider");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_text_selection.js b/accessible/tests/browser/mac/browser_text_selection.js
new file mode 100644
index 0000000000..a914adba8e
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_text_selection.js
@@ -0,0 +1,187 @@
+/* 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";
+
+/**
+ * Test simple text selection
+ */
+addAccessibleTask(`<p id="p">Hello World</p>`, async (browser, accDoc) => {
+  let macDoc = accDoc.nativeInterface.QueryInterface(
+    Ci.nsIAccessibleMacInterface
+  );
+
+  let startMarker = macDoc.getAttributeValue("AXStartTextMarker");
+  let endMarker = macDoc.getAttributeValue("AXEndTextMarker");
+  let range = macDoc.getParameterizedAttributeValue(
+    "AXTextMarkerRangeForUnorderedTextMarkers",
+    [startMarker, endMarker]
+  );
+  is(stringForRange(macDoc, range), "Hello World");
+
+  let evt = waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+    return (
+      !info.AXTextStateSync &&
+      info.AXTextStateChangeType == AXTextStateChangeTypeSelectionExtend &&
+      elem.getAttributeValue("AXRole") == "AXWebArea"
+    );
+  });
+  await SpecialPowers.spawn(browser, [], () => {
+    let p = content.document.getElementById("p");
+    let r = new content.Range();
+    r.setStart(p.firstChild, 1);
+    r.setEnd(p.firstChild, 8);
+
+    let s = content.getSelection();
+    s.addRange(r);
+  });
+  await evt;
+
+  range = macDoc.getAttributeValue("AXSelectedTextMarkerRange");
+  is(stringForRange(macDoc, range), "ello Wo");
+
+  let firstWordRange = macDoc.getParameterizedAttributeValue(
+    "AXRightWordTextMarkerRangeForTextMarker",
+    startMarker
+  );
+  is(stringForRange(macDoc, firstWordRange), "Hello");
+
+  evt = waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+    return (
+      !info.AXTextStateSync &&
+      info.AXTextStateChangeType == AXTextStateChangeTypeSelectionExtend &&
+      elem.getAttributeValue("AXRole") == "AXWebArea"
+    );
+  });
+  macDoc.setAttributeValue("AXSelectedTextMarkerRange", firstWordRange);
+  await evt;
+  range = macDoc.getAttributeValue("AXSelectedTextMarkerRange");
+  is(stringForRange(macDoc, range), "Hello");
+
+  // Collapse selection
+  evt = waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+    return (
+      info.AXTextStateSync &&
+      info.AXTextStateChangeType == AXTextStateChangeTypeSelectionMove &&
+      elem.getAttributeValue("AXRole") == "AXWebArea"
+    );
+  });
+  await SpecialPowers.spawn(browser, [], () => {
+    let s = content.getSelection();
+    s.collapseToEnd();
+  });
+  await evt;
+});
+
+/**
+ * Test text selection events caused by focus change
+ */
+addAccessibleTask(
+  `<p>
+  Hello <a href="#" id="link">World</a>,
+  I <a href="#" style="user-select: none;" id="unselectable_link">love</a>
+  <button id="button">you</button></p>`,
+  async (browser, accDoc) => {
+    // Set up an AXSelectedTextChanged listener here. It will get resolved
+    // on the first non-root event it encounters, so if we test its data at the end
+    // of this test it will show us the first text-selectable object that was focused,
+    // which is "link".
+    let selTextChanged = waitForMacEvent(
+      "AXSelectedTextChanged",
+      e => e.getAttributeValue("AXDOMIdentifier") != "body"
+    );
+
+    let focusChanged = waitForMacEvent("AXFocusedUIElementChanged");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("unselectable_link").focus();
+    });
+    let focusChangedTarget = await focusChanged;
+    is(
+      focusChangedTarget.getAttributeValue("AXDOMIdentifier"),
+      "unselectable_link",
+      "Correct event target"
+    );
+
+    focusChanged = waitForMacEvent("AXFocusedUIElementChanged");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("button").focus();
+    });
+    focusChangedTarget = await focusChanged;
+    is(
+      focusChangedTarget.getAttributeValue("AXDOMIdentifier"),
+      "button",
+      "Correct event target"
+    );
+
+    focusChanged = waitForMacEvent("AXFocusedUIElementChanged");
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("link").focus();
+    });
+    focusChangedTarget = await focusChanged;
+    is(
+      focusChangedTarget.getAttributeValue("AXDOMIdentifier"),
+      "link",
+      "Correct event target"
+    );
+
+    let selTextChangedTarget = await selTextChanged;
+    is(
+      selTextChangedTarget.getAttributeValue("AXDOMIdentifier"),
+      "link",
+      "Correct event target"
+    );
+  }
+);
+
+/**
+ * Test text selection with focus change
+ */
+addAccessibleTask(
+  `<p id="p">Hello <input id="input"></p>`,
+  async (browser, accDoc) => {
+    let macDoc = accDoc.nativeInterface.QueryInterface(
+      Ci.nsIAccessibleMacInterface
+    );
+
+    let evt = waitForMacEventWithInfo("AXSelectedTextChanged", (elem, info) => {
+      return (
+        !info.AXTextStateSync &&
+        info.AXTextStateChangeType == AXTextStateChangeTypeSelectionExtend &&
+        elem.getAttributeValue("AXRole") == "AXWebArea"
+      );
+    });
+    await SpecialPowers.spawn(browser, [], () => {
+      let p = content.document.getElementById("p");
+      let r = new content.Range();
+      r.setStart(p.firstChild, 1);
+      r.setEnd(p.firstChild, 3);
+
+      let s = content.getSelection();
+      s.addRange(r);
+    });
+    await evt;
+
+    let range = macDoc.getAttributeValue("AXSelectedTextMarkerRange");
+    is(stringForRange(macDoc, range), "el");
+
+    let events = Promise.all([
+      waitForMacEvent("AXFocusedUIElementChanged"),
+      waitForMacEventWithInfo("AXSelectedTextChanged"),
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("input").focus();
+    });
+    let [, { data }] = await events;
+    ok(
+      data.AXTextSelectionChangedFocus,
+      "have AXTextSelectionChangedFocus in event info"
+    );
+    ok(!data.AXTextStateSync, "no AXTextStateSync in editables");
+    is(
+      data.AXTextSelectionDirection,
+      AXTextSelectionDirectionDiscontiguous,
+      "discontigous direction"
+    );
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_toggle_radio_check.js b/accessible/tests/browser/mac/browser_toggle_radio_check.js
new file mode 100644
index 0000000000..17c292fd87
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_toggle_radio_check.js
@@ -0,0 +1,140 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+/**
+ * Test input[type=checkbox]
+ */
+addAccessibleTask(
+  `<input type="checkbox" id="vehicle"><label for="vehicle"> Bike</label>`,
+  async (browser, accDoc) => {
+    let checkbox = getNativeInterface(accDoc, "vehicle");
+    is(checkbox.getAttributeValue("AXValue"), 0, "Correct initial value");
+
+    let actions = checkbox.actionNames;
+    ok(actions.includes("AXPress"), "Has press action");
+
+    let evt = waitForMacEvent("AXValueChanged", "vehicle");
+    checkbox.performAction("AXPress");
+    await evt;
+    is(checkbox.getAttributeValue("AXValue"), 1, "Correct checked value");
+
+    evt = waitForMacEvent("AXValueChanged", "vehicle");
+    checkbox.performAction("AXPress");
+    await evt;
+    is(checkbox.getAttributeValue("AXValue"), 0, "Correct checked value");
+  }
+);
+
+/**
+ * Test aria-pressed toggle buttons
+ */
+addAccessibleTask(
+  `<button id="toggle" aria-pressed="false">toggle</button>`,
+  async (browser, accDoc) => {
+    // Set up a callback to change the toggle value
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("toggle").onclick = e => {
+        let curVal = e.target.getAttribute("aria-pressed");
+        let nextVal = curVal == "false" ? "true" : "false";
+        e.target.setAttribute("aria-pressed", nextVal);
+      };
+    });
+
+    let toggle = getNativeInterface(accDoc, "toggle");
+    is(toggle.getAttributeValue("AXValue"), 0, "Correct initial value");
+
+    let actions = toggle.actionNames;
+    ok(actions.includes("AXPress"), "Has press action");
+
+    let evt = waitForMacEvent("AXValueChanged", "toggle");
+    toggle.performAction("AXPress");
+    await evt;
+    is(toggle.getAttributeValue("AXValue"), 1, "Correct checked value");
+
+    evt = waitForMacEvent("AXValueChanged", "toggle");
+    toggle.performAction("AXPress");
+    await evt;
+    is(toggle.getAttributeValue("AXValue"), 0, "Correct checked value");
+  }
+);
+
+/**
+ * Test aria-checked with tri state
+ */
+addAccessibleTask(
+  `<button role="checkbox" id="checkbox" aria-checked="false">toggle</button>`,
+  async (browser, accDoc) => {
+    // Set up a callback to change the toggle value
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("checkbox").onclick = e => {
+        const states = ["false", "true", "mixed"];
+        let currState = e.target.getAttribute("aria-checked");
+        let nextState = states[(states.indexOf(currState) + 1) % states.length];
+        e.target.setAttribute("aria-checked", nextState);
+      };
+    });
+
+    let checkbox = getNativeInterface(accDoc, "checkbox");
+    is(checkbox.getAttributeValue("AXValue"), 0, "Correct initial value");
+
+    let actions = checkbox.actionNames;
+    ok(actions.includes("AXPress"), "Has press action");
+
+    let evt = waitForMacEvent("AXValueChanged", "checkbox");
+    checkbox.performAction("AXPress");
+    await evt;
+    is(checkbox.getAttributeValue("AXValue"), 1, "Correct checked value");
+
+    evt = waitForMacEvent("AXValueChanged", "checkbox");
+    checkbox.performAction("AXPress");
+    await evt;
+    is(checkbox.getAttributeValue("AXValue"), 2, "Correct checked value");
+  }
+);
+
+/**
+ * Test input[type=radio]
+ */
+addAccessibleTask(
+  `<input type="radio" id="huey" name="drone" value="huey" checked>
+   <label for="huey">Huey</label>
+   <input type="radio" id="dewey" name="drone" value="dewey">
+   <label for="dewey">Dewey</label>`,
+  async (browser, accDoc) => {
+    let huey = getNativeInterface(accDoc, "huey");
+    is(huey.getAttributeValue("AXValue"), 1, "Correct initial value for huey");
+
+    let dewey = getNativeInterface(accDoc, "dewey");
+    is(
+      dewey.getAttributeValue("AXValue"),
+      0,
+      "Correct initial value for dewey"
+    );
+
+    let actions = dewey.actionNames;
+    ok(actions.includes("AXPress"), "Has press action");
+
+    let evt = Promise.all([
+      waitForMacEvent("AXValueChanged", "huey"),
+      waitForMacEvent("AXValueChanged", "dewey"),
+    ]);
+    dewey.performAction("AXPress");
+    await evt;
+    is(
+      dewey.getAttributeValue("AXValue"),
+      1,
+      "Correct checked value for dewey"
+    );
+    is(huey.getAttributeValue("AXValue"), 0, "Correct checked value for huey");
+  }
+);
diff --git a/accessible/tests/browser/mac/browser_webarea.js b/accessible/tests/browser/mac/browser_webarea.js
new file mode 100644
index 0000000000..c1e68dac1b
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_webarea.js
@@ -0,0 +1,76 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// Test web area role and AXLoadComplete event
+addAccessibleTask(``, async (browser, accDoc) => {
+  let evt = waitForMacEvent("AXLoadComplete");
+  await SpecialPowers.spawn(browser, [], () => {
+    content.location = "data:text/html,<title>webarea test</title>";
+  });
+  let doc = await evt;
+
+  is(
+    doc.getAttributeValue("AXRole"),
+    "AXWebArea",
+    "document has AXWebArea role"
+  );
+  is(doc.getAttributeValue("AXValue"), "", "document has no AXValue");
+  is(doc.getAttributeValue("AXTitle"), null, "document has no AXTitle");
+  is(
+    doc.getAttributeValue("AXDescription"),
+    "webarea test",
+    "test has correct label"
+  );
+
+  is(doc.getAttributeValue("AXLoaded"), 1, "document has finished loading");
+});
+
+// Test iframe web area role and AXLayoutComplete event
+addAccessibleTask(`<title>webarea test</title>`, async (browser, accDoc) => {
+  // If the iframe loads before the top level document finishes loading, we'll
+  // get both an AXLayoutComplete event for the iframe and an AXLoadComplete
+  // event for the document. Otherwise, if the iframe loads after the
+  // document, we'll get one AXLoadComplete event.
+  let eventPromise = Promise.race([
+    waitForMacEvent("AXLayoutComplete"),
+    waitForMacEvent("AXLoadComplete"),
+  ]);
+  await SpecialPowers.spawn(browser, [], () => {
+    const iframe = content.document.createElement("iframe");
+    iframe.src = "data:text/html,hello world";
+    content.document.body.appendChild(iframe);
+  });
+  let doc = await eventPromise;
+
+  if (doc.getAttributeValue("AXTitle")) {
+    // iframe should have no title, so if we get a title here
+    // we've got the main document and need to get the iframe from
+    // the main doc
+    doc = doc.getAttributeValue("AXChildren")[0];
+  }
+
+  is(
+    doc.getAttributeValue("AXRole"),
+    "AXWebArea",
+    "iframe document has AXWebArea role"
+  );
+  is(doc.getAttributeValue("AXValue"), "", "iframe document has no AXValue");
+  is(doc.getAttributeValue("AXTitle"), null, "iframe document has no AXTitle");
+  is(
+    doc.getAttributeValue("AXDescription"),
+    "data:text/html,hello world",
+    "test has correct label"
+  );
+
+  is(
+    doc.getAttributeValue("AXLoaded"),
+    1,
+    "iframe document has finished loading"
+  );
+});
diff --git a/accessible/tests/browser/mac/doc_aria_tabs.html b/accessible/tests/browser/mac/doc_aria_tabs.html
new file mode 100644
index 0000000000..9de6f8b81c
--- /dev/null
+++ b/accessible/tests/browser/mac/doc_aria_tabs.html
@@ -0,0 +1,95 @@
+<!DOCTYPE html>
+<html><head>
+  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+  <meta charset="utf-8">
+
+  <style type="text/css">
+    .tabs {
+      padding: 1em;
+    }
+
+    [role="tablist"] {
+      margin-bottom: -1px;
+    }
+
+    [role="tab"] {
+      position: relative;
+      z-index: 1;
+      background: white;
+      border-radius: 5px 5px 0 0;
+      border: 1px solid grey;
+      border-bottom: 0;
+      padding: 0.2em;
+    }
+
+    [role="tab"][aria-selected="true"] {
+      z-index: 3;
+    }
+
+    [role="tabpanel"] {
+      position: relative;
+      padding: 0 0.5em 0.5em 0.7em;
+      border: 1px solid grey;
+      border-radius: 0 0 5px 5px;
+      background: white;
+      z-index: 2;
+    }
+
+    [role="tabpanel"]:focus {
+      border-color: orange;
+      outline: 1px solid orange;
+    }
+  </style>
+  <script>
+    'use strict';
+    /* exported changeTabs */
+    function changeTabs(target) {
+      const parent = target.parentNode;
+      const grandparent = parent.parentNode;
+
+      // Remove all current selected tabs
+      parent
+        .querySelectorAll('[aria-selected="true"]')
+        .forEach(t => t.setAttribute("aria-selected", false));
+
+      // Set this tab as selected
+      target.setAttribute("aria-selected", true);
+
+      // Hide all tab panels
+      grandparent
+        .querySelectorAll('[role="tabpanel"]')
+        .forEach(p => p.setAttribute("hidden", true));
+
+      // Show the selected panel
+      grandparent.parentNode
+        .querySelector(`#${target.getAttribute("aria-controls")}`)
+        .removeAttribute("hidden");
+    }
+  </script>
+  <title>ARIA: tab role - Example - code sample</title>
+</head>
+<body id="body">
+
+  <div class="tabs">
+    <div id="tablist" role="tablist" aria-label="Sample Tabs">
+      <button onclick="changeTabs(this)" role="tab" aria-selected="true" aria-controls="panel-1" id="tab-1">
+        First Tab
+      </button>
+      <button onclick="changeTabs(this)" role="tab" aria-selected="false" aria-controls="panel-2" id="tab-2">
+        Second Tab
+      </button>
+      <button onclick="changeTabs(this)" role="tab" aria-selected="false" aria-controls="panel-3" id="tab-3">
+        Third Tab
+      </button>
+    </div>
+    <div id="panel-1" role="tabpanel" tabindex="0" aria-labelledby="tab-1">
+      <p>Content for the first panel</p>
+    </div>
+    <div id="panel-2" role="tabpanel" tabindex="0" aria-labelledby="tab-2" hidden="">
+      <p>Content for the second panel</p>
+    </div>
+    <div id="panel-3" role="tabpanel" tabindex="0" aria-labelledby="tab-3" hidden="">
+      <p>Content for the third panel</p>
+    </div>
+  </div>
+</body></html>
diff --git a/accessible/tests/browser/mac/doc_menulist.xhtml b/accessible/tests/browser/mac/doc_menulist.xhtml
new file mode 100644
index 0000000000..d6751bc8f4
--- /dev/null
+++ b/accessible/tests/browser/mac/doc_menulist.xhtml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+
+<window
+    xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <hbox>
+    <label control="defaultZoom" value="Zoom"/>
+    <hbox>
+      <menulist id="defaultZoom">
+        <menupopup>
+          <menuitem label="50%" value="50"/>
+          <menuitem label="100%" value="100"/>
+          <menuitem label="150%" value="150"/>
+          <menuitem label="200%" value="200"/>
+        </menupopup>
+      </menulist>
+    </hbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/browser/mac/doc_rich_listbox.xhtml b/accessible/tests/browser/mac/doc_rich_listbox.xhtml
new file mode 100644
index 0000000000..3acaf3bff8
--- /dev/null
+++ b/accessible/tests/browser/mac/doc_rich_listbox.xhtml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <richlistbox id="categories">
+    <richlistitem id="general">
+      <label value="general"/>
+    </richlistitem>
+
+    <richlistitem id="home">
+      <label value="home"/>
+    </richlistitem>
+
+    <richlistitem id="search">
+      <label value="search"/>
+    </richlistitem>
+
+    <richlistitem id="privacy">
+      <label value="privacy"/>
+    </richlistitem>
+  </richlistbox>
+</window>
diff --git a/accessible/tests/browser/mac/doc_textmarker_test.html b/accessible/tests/browser/mac/doc_textmarker_test.html
new file mode 100644
index 0000000000..8a73c95a35
--- /dev/null
+++ b/accessible/tests/browser/mac/doc_textmarker_test.html
@@ -0,0 +1,2424 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+    <meta charset="utf-8">
+  </head>
+  <body id="body">
+    <p>Bob Loblaw Lobs Law Bomb</p>
+    <p>I love all of my <a href="#">children</a> equally</p>
+    <p>This is the <b>best</b> free scr<a href="#">apbook</a>ing class I have ever taken</p>
+    <ul>
+      <li>Fried cheese with club sauce</li>
+      <li>Popcorn shrimp with club sauce</li>
+      <li>Chicken fingers with <i>spicy</i> club sauce</li>
+    </ul>
+    <ul style="list-style: none;"><li>Do not order the Skip's Scramble</li></ul>
+    <p style="width: 1rem">These are my awards, Mother. From Army.</p>
+    <p>I <input value="deceived you">, mom.</p>
+    <script>
+      "use strict";
+      window.EXPECTED = [
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bob", "Bob"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bob", "Bob"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bob", "Bob"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bob", " "],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: [" ", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", "Loblaw"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Loblaw", " "],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: [" ", "Lobs"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Lobs", "Lobs"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Lobs", "Lobs"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Lobs", "Lobs"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
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+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Lobs", " "],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
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+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: [" ", "Law"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Law", "Law"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Law", "Law"],
+          element: ["AXStaticText",
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+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
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+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Law", " "],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: [" ", "Bomb"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bomb", "Bomb"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bomb", "Bomb"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
+          paragraph: "Bob Loblaw Lobs Law Bomb",
+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb"],
+          words: ["Bomb", "Bomb"],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "Bob Loblaw Lobs Law Bomb",
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+          lines: ["Bob Loblaw Lobs Law Bomb",
+                  "Bob Loblaw Lobs Law Bomb",
+                  "I love all of my children equally"],
+          words: ["Bomb", ""],
+          element: ["AXStaticText",
+                    "Bob Loblaw Lobs Law Bomb",
+                    "Bob Loblaw Lobs Law Bomb"] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+                  "I love all of my children equally"],
+          words: ["I", " "],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+                  "I love all of my children equally"],
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+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+                  "I love all of my children equally"],
+          words: ["love", "love"],
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+          words: ["love", "love"],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+                  "I love all of my children equally"],
+          words: ["love", " "],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
+                  "I love all of my children equally",
+                  "I love all of my children equally"],
+          words: [" ", "all"],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
+                  "I love all of my children equally",
+                  "I love all of my children equally"],
+          words: ["all", "all"],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
+                  "I love all of my children equally",
+                  "I love all of my children equally"],
+          words: ["all", "all"],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
+        { style: "I love all of my ",
+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+          words: ["all", " "],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          paragraph: "I love all of my children equally",
+          lines: ["I love all of my children equally",
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+          words: ["of", "of"],
+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          element: ["AXStaticText", "I love all of my ", "I love all of my "] },
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+          paragraph: "I love all of my children equally",
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+          paragraph: "I love all of my children equally",
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+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["These ", "These ", "These "],
+          words: ["These", "These"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["These ", "These ", "These "],
+          words: ["These", "These"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["These ", "These ", "These "],
+          words: ["These", "These"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["These ", "These ", "These "],
+          words: ["These", "These"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["These ", "These ", "These "],
+          words: ["These", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["are ", "are ", "are "],
+          words: [" ", "are"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["are ", "are ", "are "],
+          words: ["are", "are"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["are ", "are ", "are "],
+          words: ["are", "are"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["are ", "are ", "are "],
+          words: ["are", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["my ", "my ", "my "],
+          words: [" ", "my"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["my ", "my ", "my "],
+          words: ["my", "my"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["my ", "my ", "my "],
+          words: ["my", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: [" ", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards,"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", "awards, "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["awards, ", "awards, ", "awards, "],
+          words: ["awards,", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: [" ", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", "Mother. "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Mother. ", "Mother. ", "Mother. "],
+          words: ["Mother.", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["From ", "From ", "From "],
+          words: [" ", "From"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["From ", "From ", "From "],
+          words: ["From", "From"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["From ", "From ", "From "],
+          words: ["From", "From"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["From ", "From ", "From "],
+          words: ["From", "From"],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["From ", "From ", "From "],
+          words: ["From", " "],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Army.", "Army.", "Army."],
+          words: [" ", "Army."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Army.", "Army.", "Army."],
+          words: ["Army.", "Army."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Army.", "Army.", "Army."],
+          words: ["Army.", "Army."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Army.", "Army.", "Army."],
+          words: ["Army.", "Army."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "These are my awards, Mother. From Army.",
+          lines: ["Army.", "Army.", "Army."],
+          words: ["Army.", "Army."],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "These are my awards, Mother. From Army.",
+          paragraph: "I deceived you, mom.",
+          lines: ["Army.", "Army.", "I deceived you, mom."],
+          words: ["Army.", ""],
+          element: ["AXStaticText",
+                    "These are my awards, Mother. From Army.",
+                    "These are my awards, Mother. From Army."] },
+        { style: "I ",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["I", " "],
+          element: ["AXStaticText", "I ", "I "] },
+        { style: "I ",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: [" ", "deceived"],
+          element: ["AXStaticText", "I ", "I "] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", "deceived"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["deceived", " "],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: [" ", "you"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["you", "you"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["deceived you", "deceived you", "deceived you"],
+          words: ["you", "you"],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: "deceived you",
+          paragraph: "deceived you",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["you", ""],
+          element: ["AXTextField", "deceived you", "deceived you"] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: [",", " "],
+          element: ["AXStaticText", ", mom.", ", mom."] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: [", ", "mom."],
+          element: ["AXStaticText", ", mom.", ", mom."] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["mom.", "mom."],
+          element: ["AXStaticText", ", mom.", ", mom."] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["mom.", "mom."],
+          element: ["AXStaticText", ", mom.", ", mom."] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["mom.", "mom."],
+          element: ["AXStaticText", ", mom.", ", mom."] },
+        { style: ", mom.",
+          paragraph: "I deceived you, mom.",
+          lines: ["I deceived you, mom.", "I deceived you, mom.", "I deceived you, mom."],
+          words: ["mom.", ""],
+          element: ["AXStaticText", ", mom.", ", mom."] }];
+    </script>
+  </body>
+</html>
diff --git a/accessible/tests/browser/mac/doc_tree.xhtml b/accessible/tests/browser/mac/doc_tree.xhtml
new file mode 100644
index 0000000000..d043fa8923
--- /dev/null
+++ b/accessible/tests/browser/mac/doc_tree.xhtml
@@ -0,0 +1,59 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+
+<window
+    xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <tree id="tree" hidecolumnpicker="true">
+    <treecols>
+      <treecol primary="true" label="Groceries"/>
+    </treecols>
+    <treechildren id="internalTree">
+      <treeitem id="fruits" container="true" open="true">
+        <treerow>
+          <treecell label="Fruits"/>
+        </treerow>
+        <treechildren>
+          <treeitem id="apple">
+            <treerow>
+              <treecell label="Apple"/>
+            </treerow>
+          </treeitem>
+          <treeitem id="orange">
+            <treerow>
+              <treecell label="Orange"/>
+            </treerow>
+          </treeitem>
+        </treechildren>
+      </treeitem>
+      <treeitem id="veggies" container="true" open="true">
+        <treerow>
+          <treecell label="Veggies"/>
+        </treerow>
+        <treechildren>
+          <treeitem id="greenVeggies" container="true" open="true">
+            <treerow>
+              <treecell label="Green Veggies"/>
+            </treerow>
+            <treechildren>
+              <treeitem id="spinach">
+                <treerow>
+                  <treecell label="Spinach"/>
+                </treerow>
+              </treeitem>
+              <treeitem id="peas">
+                <treerow>
+                  <treecell label="Peas"/>
+                </treerow>
+              </treeitem>
+            </treechildren>
+          </treeitem>
+          <treeitem id="squash">
+            <treerow>
+              <treecell label="Squash"/>
+            </treerow>
+          </treeitem>
+        </treechildren>
+      </treeitem>
+    </treechildren>
+  </tree>
+</window>
diff --git a/accessible/tests/browser/mac/head.js b/accessible/tests/browser/mac/head.js
new file mode 100644
index 0000000000..7f70bd4a4e
--- /dev/null
+++ b/accessible/tests/browser/mac/head.js
@@ -0,0 +1,114 @@
+/* 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";
+
+/* exported getNativeInterface, waitForMacEventWithInfo, waitForMacEvent,
+   NSRange, NSDictionary, stringForRange, AXTextStateChangeTypeEdit,
+   AXTextEditTypeDelete, AXTextEditTypeTyping, AXTextStateChangeTypeSelectionMove,
+   AXTextStateChangeTypeSelectionExtend, AXTextSelectionDirectionUnknown,
+   AXTextSelectionDirectionPrevious, AXTextSelectionDirectionNext,
+   AXTextSelectionDirectionDiscontiguous, AXTextSelectionGranularityUnknown,
+   AXTextSelectionGranularityCharacter, AXTextSelectionGranularityWord */
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+// AXTextStateChangeType enum values
+const AXTextStateChangeTypeEdit = 1;
+const AXTextStateChangeTypeSelectionMove = 2;
+const AXTextStateChangeTypeSelectionExtend = 3;
+
+// AXTextEditType enum values
+const AXTextEditTypeDelete = 1;
+const AXTextEditTypeTyping = 3;
+
+// AXTextSelectionDirection enum values
+const AXTextSelectionDirectionUnknown = 0;
+const AXTextSelectionDirectionPrevious = 3;
+const AXTextSelectionDirectionNext = 4;
+const AXTextSelectionDirectionDiscontiguous = 5;
+
+// AXTextSelectionGranularity enum values
+const AXTextSelectionGranularityUnknown = 0;
+const AXTextSelectionGranularityCharacter = 1;
+const AXTextSelectionGranularityWord = 2;
+
+function getNativeInterface(accDoc, id) {
+  return findAccessibleChildByID(accDoc, id).nativeInterface.QueryInterface(
+    Ci.nsIAccessibleMacInterface
+  );
+}
+
+function waitForMacEventWithInfo(notificationType, filter) {
+  let filterFunc = (macIface, data) => {
+    if (!filter) {
+      return true;
+    }
+
+    if (typeof filter == "function") {
+      return filter(macIface, data);
+    }
+
+    return macIface.getAttributeValue("AXDOMIdentifier") == filter;
+  };
+
+  return new Promise(resolve => {
+    let eventObserver = {
+      observe(subject, topic, data) {
+        let macEvent = subject.QueryInterface(Ci.nsIAccessibleMacEvent);
+        if (
+          data === notificationType &&
+          filterFunc(macEvent.macIface, macEvent.data)
+        ) {
+          Services.obs.removeObserver(this, "accessible-mac-event");
+          resolve(macEvent);
+        }
+      },
+    };
+    Services.obs.addObserver(eventObserver, "accessible-mac-event");
+  });
+}
+
+function waitForMacEvent(notificationType, filter) {
+  return waitForMacEventWithInfo(notificationType, filter).then(
+    e => e.macIface
+  );
+}
+
+function NSRange(location, length) {
+  return {
+    valueType: "NSRange",
+    value: [location, length],
+  };
+}
+
+function NSDictionary(dict) {
+  return {
+    objectType: "NSDictionary",
+    object: dict,
+  };
+}
+
+function stringForRange(macDoc, range) {
+  if (!range) {
+    return "";
+  }
+
+  return macDoc.getParameterizedAttributeValue(
+    "AXStringForTextMarkerRange",
+    range
+  );
+}
diff --git a/accessible/tests/browser/scroll/browser.ini b/accessible/tests/browser/scroll/browser.ini
new file mode 100644
index 0000000000..1e24426535
--- /dev/null
+++ b/accessible/tests/browser/scroll/browser.ini
@@ -0,0 +1,9 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+
+[browser_test_zoom_text.js]
+skip-if = e10s && os == 'win' # bug 1372296
diff --git a/accessible/tests/browser/scroll/browser_test_zoom_text.js b/accessible/tests/browser/scroll/browser_test_zoom_text.js
new file mode 100644
index 0000000000..be58361c7b
--- /dev/null
+++ b/accessible/tests/browser/scroll/browser_test_zoom_text.js
@@ -0,0 +1,150 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/layout.js */
+loadScripts({ name: "layout.js", dir: MOCHITESTS_DIR });
+
+async function waitForContentPaint(browser) {
+  await SpecialPowers.spawn(browser, [], () => {
+    return new Promise(function(r) {
+      content.requestAnimationFrame(() => content.setTimeout(r));
+    });
+  });
+}
+
+async function runTests(browser, accDoc) {
+  await loadContentScripts(browser, "Layout.jsm");
+
+  let paragraph = findAccessibleChildByID(accDoc, "paragraph", [
+    nsIAccessibleText,
+  ]);
+  let offset = 64; // beginning of 4th stanza
+
+  let [x /* ,y*/] = getPos(paragraph);
+  let [docX, docY] = getPos(accDoc);
+
+  paragraph.scrollSubstringToPoint(
+    offset,
+    offset,
+    COORDTYPE_SCREEN_RELATIVE,
+    docX,
+    docY
+  );
+
+  await waitForContentPaint(browser);
+  testTextPos(paragraph, offset, [x, docY], COORDTYPE_SCREEN_RELATIVE);
+
+  await SpecialPowers.spawn(browser, [], () => {
+    content.Layout.zoomDocument(content.document, 2.0);
+  });
+
+  paragraph = findAccessibleChildByID(accDoc, "paragraph2", [
+    nsIAccessibleText,
+  ]);
+  offset = 52; // // beginning of 4th stanza
+  [x /* ,y*/] = getPos(paragraph);
+  paragraph.scrollSubstringToPoint(
+    offset,
+    offset,
+    COORDTYPE_SCREEN_RELATIVE,
+    docX,
+    docY
+  );
+
+  await waitForContentPaint(browser);
+  testTextPos(paragraph, offset, [x, docY], COORDTYPE_SCREEN_RELATIVE);
+}
+
+/**
+ * Test caching of accessible object states
+ */
+addAccessibleTask(
+  `
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br><hr>
+  <p id='paragraph'>
+    Пошел котик на торжок<br>
+    Купил котик пирожок<br>
+    Пошел котик на улочку<br>
+    Купил котик булочку<br>
+  </p>
+  <hr><br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br><hr>
+  <p id='paragraph2'>
+    Самому ли съесть<br>
+    Либо Сашеньке снесть<br>
+    Я и сам укушу<br>
+    Я и Сашеньке снесу<br>
+  </p>
+  <hr><br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>
+  <br><br><br><br><br><br><br><br><br><br>`,
+  runTests
+);
diff --git a/accessible/tests/browser/scroll/head.js b/accessible/tests/browser/scroll/head.js
new file mode 100644
index 0000000000..672aa46171
--- /dev/null
+++ b/accessible/tests/browser/scroll/head.js
@@ -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/. */
+
+"use strict";
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
diff --git a/accessible/tests/browser/shared-head.js b/accessible/tests/browser/shared-head.js
new file mode 100644
index 0000000000..b848e09932
--- /dev/null
+++ b/accessible/tests/browser/shared-head.js
@@ -0,0 +1,779 @@
+/* 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";
+
+/* import-globals-from ../mochitest/common.js */
+/* import-globals-from ../mochitest/promisified-events.js */
+
+/* exported Logger, MOCHITESTS_DIR, invokeSetAttribute, invokeFocus,
+            invokeSetStyle, getAccessibleDOMNodeID, getAccessibleTagName,
+            addAccessibleTask, findAccessibleChildByID, isDefunct,
+            CURRENT_CONTENT_DIR, loadScripts, loadContentScripts, snippetToURL,
+            Cc, Cu, arrayFromChildren, forceGC, contentSpawnMutation,
+            DEFAULT_IFRAME_ID, DEFAULT_IFRAME_DOC_BODY_ID, invokeContentTask,
+            matchContentDoc, currentContentDoc, getContentDPR,
+            waitForImageMap, getContentBoundsForDOMElm */
+
+const CURRENT_FILE_DIR = "/browser/accessible/tests/browser/";
+
+/**
+ * Current browser test directory path used to load subscripts.
+ */
+const CURRENT_DIR = `chrome://mochitests/content${CURRENT_FILE_DIR}`;
+/**
+ * A11y mochitest directory where we find common files used in both browser and
+ * plain tests.
+ */
+const MOCHITESTS_DIR =
+  "chrome://mochitests/content/a11y/accessible/tests/mochitest/";
+/**
+ * A base URL for test files used in content.
+ */
+const CURRENT_CONTENT_DIR = `http://example.com${CURRENT_FILE_DIR}`;
+
+const LOADED_CONTENT_SCRIPTS = new Map();
+
+const DEFAULT_CONTENT_DOC_BODY_ID = "body";
+const DEFAULT_IFRAME_ID = "default-iframe-id";
+const DEFAULT_IFRAME_DOC_BODY_ID = "default-iframe-body-id";
+
+const HTML_MIME_TYPE = "text/html";
+const XHTML_MIME_TYPE = "application/xhtml+xml";
+
+function loadHTMLFromFile(path) {
+  // Load the HTML to return in the response from file.
+  // Since it's relative to the cwd of the test runner, we start there and
+  // append to get to the actual path of the file.
+  const testHTMLFile = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
+  const dirs = path.split("/");
+  for (let i = 0; i < dirs.length; i++) {
+    testHTMLFile.append(dirs[i]);
+  }
+
+  const testHTMLFileStream = Cc[
+    "@mozilla.org/network/file-input-stream;1"
+  ].createInstance(Ci.nsIFileInputStream);
+  testHTMLFileStream.init(testHTMLFile, -1, 0, 0);
+  const testHTML = NetUtil.readInputStreamToString(
+    testHTMLFileStream,
+    testHTMLFileStream.available()
+  );
+
+  return testHTML;
+}
+
+let gIsIframe = false;
+let gIsRemoteIframe = false;
+
+function currentContentDoc() {
+  return gIsIframe ? DEFAULT_IFRAME_DOC_BODY_ID : DEFAULT_CONTENT_DOC_BODY_ID;
+}
+
+/**
+ * Accessible event match criteria based on the id of the current document
+ * accessible in test.
+ *
+ * @param   {nsIAccessibleEvent}  event
+ *        Accessible event to be tested for a match.
+ *
+ * @return  {Boolean}
+ *          True if accessible event's accessible object ID matches current
+ *          document accessible ID.
+ */
+function matchContentDoc(event) {
+  return getAccessibleDOMNodeID(event.accessible) === currentContentDoc();
+}
+
+/**
+ * Used to dump debug information.
+ */
+let Logger = {
+  /**
+   * Set up this variable to dump log messages into console.
+   */
+  dumpToConsole: false,
+
+  /**
+   * Set up this variable to dump log messages into error console.
+   */
+  dumpToAppConsole: false,
+
+  /**
+   * Return true if dump is enabled.
+   */
+  get enabled() {
+    return this.dumpToConsole || this.dumpToAppConsole;
+  },
+
+  /**
+   * Dump information into console if applicable.
+   */
+  log(msg) {
+    if (this.enabled) {
+      this.logToConsole(msg);
+      this.logToAppConsole(msg);
+    }
+  },
+
+  /**
+   * Log message to console.
+   */
+  logToConsole(msg) {
+    if (this.dumpToConsole) {
+      dump(`\n${msg}\n`);
+    }
+  },
+
+  /**
+   * Log message to error console.
+   */
+  logToAppConsole(msg) {
+    if (this.dumpToAppConsole) {
+      Services.console.logStringMessage(`${msg}`);
+    }
+  },
+};
+
+/**
+ * Asynchronously set or remove content element's attribute (in content process
+ * if e10s is enabled).
+ * @param  {Object}  browser  current "tabbrowser" element
+ * @param  {String}  id       content element id
+ * @param  {String}  attr     attribute name
+ * @param  {String?} value    optional attribute value, if not present, remove
+ *                            attribute
+ * @return {Promise}          promise indicating that attribute is set/removed
+ */
+function invokeSetAttribute(browser, id, attr, value) {
+  if (value) {
+    Logger.log(`Setting ${attr} attribute to ${value} for node with id: ${id}`);
+  } else {
+    Logger.log(`Removing ${attr} attribute from node with id: ${id}`);
+  }
+
+  return invokeContentTask(
+    browser,
+    [id, attr, value],
+    (contentId, contentAttr, contentValue) => {
+      let elm = content.document.getElementById(contentId);
+      if (contentValue) {
+        elm.setAttribute(contentAttr, contentValue);
+      } else {
+        elm.removeAttribute(contentAttr);
+      }
+    }
+  );
+}
+
+/**
+ * Asynchronously set or remove content element's style (in content process if
+ * e10s is enabled, or in fission process if fission is enabled and a fission
+ * frame is present).
+ * @param  {Object}  browser  current "tabbrowser" element
+ * @param  {String}  id       content element id
+ * @param  {String}  aStyle   style property name
+ * @param  {String?} aValue   optional style property value, if not present,
+ *                            remove style
+ * @return {Promise}          promise indicating that style is set/removed
+ */
+function invokeSetStyle(browser, id, style, value) {
+  if (value) {
+    Logger.log(`Setting ${style} style to ${value} for node with id: ${id}`);
+  } else {
+    Logger.log(`Removing ${style} style from node with id: ${id}`);
+  }
+
+  return invokeContentTask(
+    browser,
+    [id, style, value],
+    (contentId, contentStyle, contentValue) => {
+      const elm = content.document.getElementById(contentId);
+      if (contentValue) {
+        elm.style[contentStyle] = contentValue;
+      } else {
+        delete elm.style[contentStyle];
+      }
+    }
+  );
+}
+
+/**
+ * Asynchronously set focus on a content element (in content process if e10s is
+ * enabled, or in fission process if fission is enabled and a fission frame is
+ * present).
+ * @param  {Object}  browser  current "tabbrowser" element
+ * @param  {String}  id       content element id
+ * @return {Promise} promise  indicating that focus is set
+ */
+function invokeFocus(browser, id) {
+  Logger.log(`Setting focus on a node with id: ${id}`);
+
+  return invokeContentTask(browser, [id], contentId => {
+    const elm = content.document.getElementById(contentId);
+    if (elm.editor) {
+      elm.selectionStart = elm.selectionEnd = elm.value.length;
+    }
+
+    elm.focus();
+  });
+}
+
+/**
+ * Get DPR for a specific content window.
+ * @param  browser
+ *         Browser for which we want its content window's DPR reported.
+ *
+ * @return {Promise}
+ *         Promise with the value that resolves to the devicePixelRatio of the
+ *         content window of a given browser.
+ *
+ */
+function getContentDPR(browser) {
+  return invokeContentTask(browser, [], () => content.window.devicePixelRatio);
+}
+
+/**
+ * Asynchronously perform a task in content (in content process if e10s is
+ * enabled, or in fission process if fission is enabled and a fission frame is
+ * present).
+ * @param  {Object}    browser  current "tabbrowser" element
+ * @param  {Array}     args     arguments for the content task
+ * @param  {Function}  task     content task function
+ *
+ * @return {Promise} promise  indicating that content task is complete
+ */
+function invokeContentTask(browser, args, task) {
+  return SpecialPowers.spawn(
+    browser,
+    [DEFAULT_IFRAME_ID, task.toString(), ...args],
+    (iframeId, contentTask, ...contentArgs) => {
+      // eslint-disable-next-line no-eval
+      const runnableTask = eval(`
+      (() => {
+        return (${contentTask});
+      })();`);
+      const frame = content.document.getElementById(iframeId);
+
+      return frame
+        ? SpecialPowers.spawn(frame, contentArgs, runnableTask)
+        : runnableTask.call(this, ...contentArgs);
+    }
+  );
+}
+
+/**
+ * Compare process ID's between the top level content process and possible
+ * remote/local iframe proccess.
+ * @param {Object}  browser
+ *        Top level browser object for a tab.
+ * @param {Boolean} isRemote
+ *        Indicates if we expect the iframe content process to be remote or not.
+ */
+async function comparePIDs(browser, isRemote) {
+  function getProcessID() {
+    const { Services } = ChromeUtils.import(
+      "resource://gre/modules/Services.jsm"
+    );
+
+    return Services.appinfo.processID;
+  }
+
+  const contentPID = await SpecialPowers.spawn(browser, [], getProcessID);
+  const iframePID = await invokeContentTask(browser, [], getProcessID);
+  is(
+    isRemote,
+    contentPID !== iframePID,
+    isRemote
+      ? "Remote IFRAME is in a different process."
+      : "IFRAME is in the same process."
+  );
+}
+
+/**
+ * Load a list of scripts into the test
+ * @param {Array} scripts  a list of scripts to load
+ */
+function loadScripts(...scripts) {
+  for (let script of scripts) {
+    let path =
+      typeof script === "string"
+        ? `${CURRENT_DIR}${script}`
+        : `${script.dir}${script.name}`;
+    Services.scriptloader.loadSubScript(path, this);
+  }
+}
+
+/**
+ * Load a list of scripts into target's content.
+ * @param {Object} target
+ *        target for loading scripts into
+ * @param {Array}  scripts
+ *        a list of scripts to load into content
+ */
+async function loadContentScripts(target, ...scripts) {
+  for (let script of scripts) {
+    let contentScript;
+    if (typeof script === "string") {
+      // If script string includes a .jsm extention, assume it is a module path.
+      contentScript = `${CURRENT_DIR}${script}`;
+    } else {
+      // Script is a object that has { dir, name } format.
+      contentScript = `${script.dir}${script.name}`;
+    }
+
+    let loadedScriptSet = LOADED_CONTENT_SCRIPTS.get(contentScript);
+    if (!loadedScriptSet) {
+      loadedScriptSet = new WeakSet();
+      LOADED_CONTENT_SCRIPTS.set(contentScript, loadedScriptSet);
+    } else if (loadedScriptSet.has(target)) {
+      continue;
+    }
+
+    await SpecialPowers.spawn(target, [contentScript], async _contentScript => {
+      ChromeUtils.import(_contentScript, content.window);
+    });
+    loadedScriptSet.add(target);
+  }
+}
+
+function attrsToString(attrs) {
+  return Object.entries(attrs)
+    .map(([attr, value]) => `${attr}=${JSON.stringify(value)}`)
+    .join(" ");
+}
+
+function wrapWithIFrame(doc, options = {}) {
+  let src;
+  let { iframeAttrs = {}, iframeDocBodyAttrs = {} } = options;
+  iframeDocBodyAttrs = {
+    id: DEFAULT_IFRAME_DOC_BODY_ID,
+    ...iframeDocBodyAttrs,
+  };
+  if (options.remoteIframe) {
+    const srcURL = new URL(`http://example.net/document-builder.sjs`);
+    if (doc.endsWith("html")) {
+      srcURL.searchParams.append("file", `${CURRENT_FILE_DIR}${doc}`);
+    } else {
+      srcURL.searchParams.append(
+        "html",
+        `<html>
+          <head>
+            <meta charset="utf-8"/>
+            <title>Accessibility Fission Test</title>
+          </head>
+          <body ${attrsToString(iframeDocBodyAttrs)}>${doc}</body>
+        </html>`
+      );
+    }
+    src = srcURL.href;
+  } else {
+    const mimeType = doc.endsWith("xhtml") ? XHTML_MIME_TYPE : HTML_MIME_TYPE;
+    if (doc.endsWith("html")) {
+      doc = loadHTMLFromFile(`${CURRENT_FILE_DIR}${doc}`);
+      doc = doc.replace(
+        /<body[.\s\S]*?>/,
+        `<body ${attrsToString(iframeDocBodyAttrs)}>`
+      );
+    } else {
+      doc = `<body ${attrsToString(iframeDocBodyAttrs)}>${doc}</body>`;
+    }
+
+    src = `data:${mimeType};charset=utf-8,${encodeURIComponent(doc)}`;
+  }
+
+  iframeAttrs = {
+    id: DEFAULT_IFRAME_ID,
+    src,
+    ...iframeAttrs,
+  };
+
+  return `<iframe ${attrsToString(iframeAttrs)}/>`;
+}
+
+/**
+ * Takes an HTML snippet or HTML doc url and returns an encoded URI for a full
+ * document with the snippet or the URL as a source for the IFRAME.
+ * @param {String} doc
+ *        a markup snippet or url.
+ * @param {Object} options (see options in addAccessibleTask).
+ *
+ * @return {String}
+ *        a base64 encoded data url of the document container the snippet.
+ **/
+function snippetToURL(doc, options = {}) {
+  const { contentDocBodyAttrs = {} } = options;
+  const attrs = {
+    id: DEFAULT_CONTENT_DOC_BODY_ID,
+    ...contentDocBodyAttrs,
+  };
+
+  if (gIsIframe) {
+    doc = wrapWithIFrame(doc, options);
+  }
+
+  const encodedDoc = encodeURIComponent(
+    `<html>
+      <head>
+        <meta charset="utf-8"/>
+        <title>Accessibility Test</title>
+      </head>
+      <body ${attrsToString(attrs)}>${doc}</body>
+    </html>`
+  );
+
+  return `data:text/html;charset=utf-8,${encodedDoc}`;
+}
+
+function accessibleTask(doc, task, options = {}) {
+  return async function() {
+    gIsRemoteIframe = options.remoteIframe;
+    gIsIframe = options.iframe || gIsRemoteIframe;
+    let url;
+    if (options.chrome && doc.endsWith("html")) {
+      // Load with a chrome:// URL so this loads as a chrome document in the
+      // parent process.
+      url = `${CURRENT_DIR}${doc}`;
+    } else if (doc.endsWith("html") && !gIsIframe) {
+      url = `${CURRENT_CONTENT_DIR}${doc}`;
+    } else {
+      url = snippetToURL(doc, options);
+    }
+
+    registerCleanupFunction(() => {
+      for (let observer of Services.obs.enumerateObservers(
+        "accessible-event"
+      )) {
+        Services.obs.removeObserver(observer, "accessible-event");
+      }
+    });
+
+    let onContentDocLoad;
+    if (!options.chrome) {
+      onContentDocLoad = waitForEvent(
+        EVENT_DOCUMENT_LOAD_COMPLETE,
+        DEFAULT_CONTENT_DOC_BODY_ID
+      );
+    }
+
+    let onIframeDocLoad;
+    if (options.remoteIframe && !options.skipFissionDocLoad) {
+      onIframeDocLoad = waitForEvent(
+        EVENT_DOCUMENT_LOAD_COMPLETE,
+        DEFAULT_IFRAME_DOC_BODY_ID
+      );
+    }
+
+    await BrowserTestUtils.withNewTab(
+      {
+        gBrowser,
+        url,
+      },
+      async function(browser) {
+        registerCleanupFunction(() => {
+          if (browser) {
+            let tab = gBrowser.getTabForBrowser(browser);
+            if (tab && !tab.closing && tab.linkedBrowser) {
+              gBrowser.removeTab(tab);
+            }
+          }
+        });
+
+        await SimpleTest.promiseFocus(browser);
+        await loadContentScripts(browser, "Common.jsm");
+
+        if (options.chrome) {
+          ok(!browser.isRemoteBrowser, "Not remote browser");
+        } else if (Services.appinfo.browserTabsRemoteAutostart) {
+          ok(browser.isRemoteBrowser, "Actually remote browser");
+        }
+
+        let docAccessible;
+        if (options.chrome) {
+          // Chrome documents don't fire DOCUMENT_LOAD_COMPLETE. Instead, wait
+          // until we can get the DocAccessible and it doesn't have the busy
+          // state.
+          await BrowserTestUtils.waitForCondition(() => {
+            docAccessible = getAccessible(browser.contentWindow.document);
+            if (!docAccessible) {
+              return false;
+            }
+            const state = {};
+            docAccessible.getState(state, {});
+            return !(state.value & STATE_BUSY);
+          });
+        } else {
+          ({ accessible: docAccessible } = await onContentDocLoad);
+        }
+        let iframeDocAccessible;
+        if (gIsIframe) {
+          if (!options.skipFissionDocLoad) {
+            await comparePIDs(browser, options.remoteIframe);
+            iframeDocAccessible = onIframeDocLoad
+              ? (await onIframeDocLoad).accessible
+              : findAccessibleChildByID(docAccessible, DEFAULT_IFRAME_ID)
+                  .firstChild;
+          }
+        }
+
+        await task(
+          browser,
+          iframeDocAccessible || docAccessible,
+          iframeDocAccessible && docAccessible
+        );
+      }
+    );
+  };
+}
+
+/**
+ * A wrapper around browser test add_task that triggers an accessible test task
+ * as a new browser test task with given document, data URL or markup snippet.
+ * @param  {String} doc
+ *         URL (relative to current directory) or data URL or markup snippet
+ *         that is used to test content with
+ * @param  {Function|AsyncFunction} task
+ *         a generator or a function with tests to run
+ * @param  {null|Object} options
+ *         Options for running accessibility test tasks:
+ *         - {Boolean} topLevel
+ *           Flag to run the test with content in the top level content process.
+ *           Default is true.
+ *         - {Boolean} chrome
+ *           Flag to run the test with content as a chrome document in the
+ *           parent process. Default is false. This is only valid if url is a
+ *           relative URL to a XUL document, not a markup snippet. topLevel
+ *           should usually be set to false in this case, since XUL documents
+ *           don't work in the content process.
+ *         - {Boolean} iframe
+ *           Flag to run the test with content wrapped in an iframe. Default is
+ *           false.
+ *         - {Boolean} remoteIframe
+ *           Flag to run the test with content wrapped in a remote iframe.
+ *           Default is false.
+ *         - {Object} iframeAttrs
+ *           A map of attribute/value pairs to be applied to IFRAME element.
+ *         - {Boolean} skipFissionDocLoad
+ *           If true, the test will not wait for iframe document document
+ *           loaded event (useful for when IFRAME is initially hidden).
+ *         - {Object} contentDocBodyAttrs
+ *           a set of attributes to be applied to a top level content document
+ *           body
+ *         - {Object} iframeDocBodyAttrs
+ *           a set of attributes to be applied to a iframe content document body
+ */
+function addAccessibleTask(doc, task, options = {}) {
+  const {
+    topLevel = true,
+    chrome = false,
+    iframe = false,
+    remoteIframe = false,
+  } = options;
+  if (topLevel) {
+    add_task(
+      accessibleTask(doc, task, {
+        ...options,
+        chrome: false,
+        iframe: false,
+        remoteIframe: false,
+      })
+    );
+  }
+
+  if (chrome) {
+    add_task(
+      accessibleTask(doc, task, {
+        ...options,
+        topLevel: false,
+        iframe: false,
+        remoteIframe: false,
+      })
+    );
+  }
+
+  if (iframe) {
+    add_task(
+      accessibleTask(doc, task, {
+        ...options,
+        topLevel: false,
+        chrome: false,
+        remoteIframe: false,
+      })
+    );
+  }
+
+  if (gFissionBrowser && remoteIframe) {
+    add_task(
+      accessibleTask(doc, task, {
+        ...options,
+        topLevel: false,
+        chrome: false,
+        iframe: false,
+      })
+    );
+  }
+}
+
+/**
+ * Check if an accessible object has a defunct test.
+ * @param  {nsIAccessible}  accessible object to test defunct state for
+ * @return {Boolean}        flag indicating defunct state
+ */
+function isDefunct(accessible) {
+  let defunct = false;
+  try {
+    let extState = {};
+    accessible.getState({}, extState);
+    defunct = extState.value & Ci.nsIAccessibleStates.EXT_STATE_DEFUNCT;
+  } catch (x) {
+    defunct = true;
+  } finally {
+    if (defunct) {
+      Logger.log(`Defunct accessible: ${prettyName(accessible)}`);
+    }
+  }
+  return defunct;
+}
+
+/**
+ * Get the DOM tag name for a given accessible.
+ * @param  {nsIAccessible}  accessible accessible
+ * @return {String?}                   tag name of associated DOM node, or null.
+ */
+function getAccessibleTagName(acc) {
+  try {
+    return acc.attributes.getStringProperty("tag");
+  } catch (e) {
+    return null;
+  }
+}
+
+/**
+ * Traverses the accessible tree starting from a given accessible as a root and
+ * looks for an accessible that matches based on its DOMNode id.
+ * @param  {nsIAccessible}  accessible root accessible
+ * @param  {String}         id         id to look up accessible for
+ * @param  {Array?}         interfaces the interface or an array interfaces
+ *                                     to query it/them from obtained accessible
+ * @return {nsIAccessible?}            found accessible if any
+ */
+function findAccessibleChildByID(accessible, id, interfaces) {
+  if (getAccessibleDOMNodeID(accessible) === id) {
+    return queryInterfaces(accessible, interfaces);
+  }
+  for (let i = 0; i < accessible.children.length; ++i) {
+    let found = findAccessibleChildByID(accessible.getChildAt(i), id);
+    if (found) {
+      return queryInterfaces(found, interfaces);
+    }
+  }
+  return null;
+}
+
+function queryInterfaces(accessible, interfaces) {
+  if (!interfaces) {
+    return accessible;
+  }
+
+  for (let iface of interfaces.filter(i => !(accessible instanceof i))) {
+    try {
+      accessible.QueryInterface(iface);
+    } catch (e) {
+      ok(false, "Can't query " + iface);
+    }
+  }
+
+  return accessible;
+}
+
+function arrayFromChildren(accessible) {
+  return Array.from({ length: accessible.childCount }, (c, i) =>
+    accessible.getChildAt(i)
+  );
+}
+
+/**
+ * Force garbage collection.
+ */
+function forceGC() {
+  SpecialPowers.gc();
+  SpecialPowers.forceShrinkingGC();
+  SpecialPowers.forceCC();
+  SpecialPowers.gc();
+  SpecialPowers.forceShrinkingGC();
+  SpecialPowers.forceCC();
+}
+
+/*
+ * This function spawns a content task and awaits expected mutation events from
+ * various content changes. It's good at catching events we did *not* expect. We
+ * do this advancing the layout refresh to flush the relocations/insertions
+ * queue.
+ */
+async function contentSpawnMutation(browser, waitFor, func, args = []) {
+  let onReorders = waitForEvents({ expected: waitFor.expected || [] });
+  let unexpectedListener = new UnexpectedEvents(waitFor.unexpected || []);
+
+  function tick() {
+    // 100ms is an arbitrary positive number to advance the clock.
+    // We don't need to advance the clock for a11y mutations, but other
+    // tick listeners may depend on an advancing clock with each refresh.
+    content.windowUtils.advanceTimeAndRefresh(100);
+  }
+
+  // This stops the refreh driver from doing its regular ticks, and leaves
+  // us in control.
+  await invokeContentTask(browser, [], tick);
+
+  // Perform the tree mutation.
+  await invokeContentTask(browser, args, func);
+
+  // Do one tick to flush our queue (insertions, relocations, etc.)
+  await invokeContentTask(browser, [], tick);
+
+  let events = await onReorders;
+
+  unexpectedListener.stop();
+
+  // Go back to normal refresh driver ticks.
+  await invokeContentTask(browser, [], function() {
+    content.windowUtils.restoreNormalRefresh();
+  });
+
+  return events;
+}
+
+async function waitForImageMap(browser, accDoc, id = "imgmap") {
+  const acc = findAccessibleChildByID(accDoc, id);
+  if (acc.firstChild) {
+    return;
+  }
+
+  const onReorder = waitForEvent(EVENT_REORDER, id);
+  // Wave over image map
+  await invokeContentTask(browser, [id], contentId => {
+    const { ContentTaskUtils } = ChromeUtils.import(
+      "resource://testing-common/ContentTaskUtils.jsm"
+    );
+    const EventUtils = ContentTaskUtils.getEventUtils(content);
+    EventUtils.synthesizeMouse(
+      content.document.getElementById(contentId),
+      10,
+      10,
+      { type: "mousemove" },
+      content
+    );
+  });
+  await onReorder;
+}
+
+async function getContentBoundsForDOMElm(browser, id) {
+  return invokeContentTask(browser, [id], contentId => {
+    const { Layout: LayoutUtils } = ChromeUtils.import(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.jsm"
+    );
+
+    return LayoutUtils.getBoundsForDOMElm(contentId, content.document);
+  });
+}
diff --git a/accessible/tests/browser/states/browser.ini b/accessible/tests/browser/states/browser.ini
new file mode 100644
index 0000000000..726c7f4f03
--- /dev/null
+++ b/accessible/tests/browser/states/browser.ini
@@ -0,0 +1,17 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/browser/*.jsm
+
+[browser_test_link.js]
+skip-if = verify
+[browser_test_visibility.js]
+[browser_deck_has_out_of_process_iframe.js]
+skip-if = (!debug && webrender && (os == 'win')) # bug 1584037
+support-files =
+  target.html
+  test_deck_has_out_of_process_iframe.xhtml
+[browser_offscreen_element_in_out_of_process_iframe.js]
+skip-if = (webrender && os == 'win') # bug 1580706
diff --git a/accessible/tests/browser/states/browser_deck_has_out_of_process_iframe.js b/accessible/tests/browser/states/browser_deck_has_out_of_process_iframe.js
new file mode 100644
index 0000000000..155ac4c954
--- /dev/null
+++ b/accessible/tests/browser/states/browser_deck_has_out_of_process_iframe.js
@@ -0,0 +1,133 @@
+/* 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 { Preferences } = ChromeUtils.import(
+  "resource://gre/modules/Preferences.jsm"
+);
+
+const DIRPATH = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content/",
+  ""
+);
+const parentPATH = DIRPATH + "test_deck_has_out_of_process_iframe.xhtml";
+const iframePATH = DIRPATH + "target.html";
+
+// XXX: Using external files here since using data URL breaks something, e.g. it
+// makes querying the second iframe in a hidden deck failure for some reasons.
+const parentURL = `http://example.com/${parentPATH}`;
+const iframeURL = `http://example.org/${iframePATH}`;
+
+add_task(async function() {
+  if (Preferences.locked("fission.autostart")) {
+    ok(
+      true,
+      "fission.autostart pref is locked on this channel which means " +
+        "we don't need to run the following tests"
+    );
+    return;
+  }
+
+  const win = await BrowserTestUtils.openNewBrowserWindow({
+    fission: true,
+  });
+
+  try {
+    const browser = win.gBrowser.selectedTab.linkedBrowser;
+
+    BrowserTestUtils.loadURI(browser, parentURL);
+    await BrowserTestUtils.browserLoaded(browser, false, parentURL);
+
+    async function setupIFrame(id, url) {
+      const iframe = content.document.getElementById(id);
+
+      iframe.contentWindow.location = url;
+      await new Promise(resolve => {
+        iframe.addEventListener("load", resolve, { once: true });
+      });
+
+      return iframe.browsingContext;
+    }
+
+    async function spawnSelectDeck(index) {
+      async function selectDeck(i) {
+        const deck = content.document.getElementById("deck");
+
+        deck.setAttribute("selectedIndex", i);
+        await new Promise(resolve => {
+          content.window.addEventListener("MozAfterPaint", resolve, {
+            once: true,
+          });
+        });
+        return deck.selectedIndex;
+      }
+      await SpecialPowers.spawn(browser, [index], selectDeck);
+
+      await waitForIFrameUpdates();
+    }
+
+    const firstIFrame = await SpecialPowers.spawn(
+      browser,
+      ["first", iframeURL],
+      setupIFrame
+    );
+    const secondIFrame = await SpecialPowers.spawn(
+      browser,
+      ["second", iframeURL],
+      setupIFrame
+    );
+
+    await waitForIFrameUpdates();
+
+    await spawnTestStates(
+      firstIFrame,
+      "target",
+      0,
+      nsIAccessibleStates.STATE_OFFSCREEN
+    );
+    // Disable the check for the target element in the unselected pane of the
+    // deck, this should be fixed by bug 1578932.
+    // Note: As of now we can't use todo in the script transfered into the
+    // out-of-process.
+    //await spawnTestStates(
+    //  secondIFrame,
+    //  "target",
+    //  nsIAccessibleStates.STATE_OFFSCREEN,
+    //  nsIAccessibleStates.STATE_INVISIBLE
+    //);
+
+    // Select the second panel.
+    await spawnSelectDeck(1);
+    await spawnTestStates(
+      firstIFrame,
+      "target",
+      nsIAccessibleStates.STATE_OFFSCREEN,
+      nsIAccessibleStates.STATE_INVISIBLE
+    );
+    await spawnTestStates(
+      secondIFrame,
+      "target",
+      0,
+      nsIAccessibleStates.STATE_OFFSCREEN
+    );
+
+    // Select the first panel again.
+    await spawnSelectDeck(0);
+    await spawnTestStates(
+      firstIFrame,
+      "target",
+      0,
+      nsIAccessibleStates.STATE_OFFSCREEN
+    );
+    await spawnTestStates(
+      secondIFrame,
+      "target",
+      nsIAccessibleStates.STATE_OFFSCREEN,
+      nsIAccessibleStates.STATE_INVISIBLE
+    );
+  } finally {
+    await BrowserTestUtils.closeWindow(win);
+  }
+});
diff --git a/accessible/tests/browser/states/browser_offscreen_element_in_out_of_process_iframe.js b/accessible/tests/browser/states/browser_offscreen_element_in_out_of_process_iframe.js
new file mode 100644
index 0000000000..289d3fec9a
--- /dev/null
+++ b/accessible/tests/browser/states/browser_offscreen_element_in_out_of_process_iframe.js
@@ -0,0 +1,98 @@
+/* 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 parentURL =
+  "data:text/html;charset=utf-8," +
+  '<div id="scroller" style="width: 300px; height: 300px; overflow-y: scroll; overflow-x: hidden;">' +
+  '  <div style="width: 100%; height: 1000px;"></div>' +
+  '  <iframe frameborder="0"/>' +
+  "</div>";
+const iframeURL =
+  "data:text/html;charset=utf-8," +
+  "<style>" +
+  " html,body {" +
+  "   /* Convenient for calculation of element positions */" +
+  "   margin: 0;" +
+  "   padding: 0;" +
+  " }" +
+  "</style>" +
+  '<div id="target" style="width: 100px; height: 100px;">target</div>';
+
+add_task(async function() {
+  const win = await BrowserTestUtils.openNewBrowserWindow({
+    fission: true,
+  });
+
+  try {
+    const browser = win.gBrowser.selectedTab.linkedBrowser;
+
+    BrowserTestUtils.loadURI(browser, parentURL);
+    await BrowserTestUtils.browserLoaded(browser, false, parentURL);
+
+    async function setup(url) {
+      const iframe = content.document.querySelector("iframe");
+
+      iframe.contentWindow.location = url;
+      await new Promise(resolve => {
+        iframe.addEventListener("load", resolve, { once: true });
+      });
+
+      return iframe.browsingContext;
+    }
+
+    async function scrollTo(x, y) {
+      await SpecialPowers.spawn(browser, [x, y], async (scrollX, scrollY) => {
+        const scroller = content.document.getElementById("scroller");
+        scroller.scrollTo(scrollX, scrollY);
+        await new Promise(resolve => {
+          scroller.addEventListener("scroll", resolve, { once: true });
+        });
+      });
+      await waitForIFrameUpdates();
+    }
+
+    // Setup an out-of-process iframe which is initially scrolled out.
+    const iframe = await SpecialPowers.spawn(browser, [iframeURL], setup);
+
+    await waitForIFrameA11yReady(iframe);
+    await spawnTestStates(
+      iframe,
+      "target",
+      nsIAccessibleStates.STATE_OFFSCREEN,
+      nsIAccessibleStates.STATE_INVISIBLE
+    );
+
+    // Scroll the iframe into view and the target element is also visible but
+    // the visible area height is 11px.
+    await scrollTo(0, 711);
+    await spawnTestStates(
+      iframe,
+      "target",
+      nsIAccessibleStates.STATE_OFFSCREEN,
+      nsIAccessibleStates.STATE_INVISIBLE
+    );
+
+    // Scroll to a position where the visible height is 13px.
+    await scrollTo(0, 713);
+    await spawnTestStates(
+      iframe,
+      "target",
+      0,
+      nsIAccessibleStates.STATE_OFFSCREEN
+    );
+
+    // Scroll the iframe out again.
+    await scrollTo(0, 0);
+    await spawnTestStates(
+      iframe,
+      "target",
+      nsIAccessibleStates.STATE_OFFSCREEN,
+      nsIAccessibleStates.STATE_INVISIBLE
+    );
+  } finally {
+    await BrowserTestUtils.closeWindow(win);
+  }
+});
diff --git a/accessible/tests/browser/states/browser_test_link.js b/accessible/tests/browser/states/browser_test_link.js
new file mode 100644
index 0000000000..f747a69971
--- /dev/null
+++ b/accessible/tests/browser/states/browser_test_link.js
@@ -0,0 +1,47 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+async function runTests(browser, accDoc) {
+  let getAcc = id => findAccessibleChildByID(accDoc, id);
+
+  // a: no traversed state
+  testStates(getAcc("link_traversed"), 0, 0, STATE_TRAVERSED);
+
+  let onStateChanged = waitForEvent(EVENT_STATE_CHANGE, "link_traversed");
+  let newWinOpened = BrowserTestUtils.waitForNewWindow();
+
+  await BrowserTestUtils.synthesizeMouse(
+    "#link_traversed",
+    1,
+    1,
+    { shiftKey: true },
+    browser
+  );
+
+  await onStateChanged;
+  testStates(getAcc("link_traversed"), STATE_TRAVERSED);
+
+  let newWin = await newWinOpened;
+  await BrowserTestUtils.closeWindow(newWin);
+}
+
+/**
+ * Test caching of accessible object states
+ */
+addAccessibleTask(
+  `
+  <a id="link_traversed" href="http://www.example.com" target="_top">
+    example.com
+  </a>`,
+  runTests
+);
diff --git a/accessible/tests/browser/states/browser_test_visibility.js b/accessible/tests/browser/states/browser_test_visibility.js
new file mode 100644
index 0000000000..572c6f57d3
--- /dev/null
+++ b/accessible/tests/browser/states/browser_test_visibility.js
@@ -0,0 +1,52 @@
+/* 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";
+
+/* import-globals-from ../../mochitest/role.js */
+/* import-globals-from ../../mochitest/states.js */
+loadScripts(
+  { name: "role.js", dir: MOCHITESTS_DIR },
+  { name: "states.js", dir: MOCHITESTS_DIR }
+);
+
+async function runTest(browser, accDoc) {
+  let getAcc = id => findAccessibleChildByID(accDoc, id);
+
+  testStates(getAcc("div"), 0, 0, STATE_INVISIBLE | STATE_OFFSCREEN);
+
+  let input = getAcc("input_scrolledoff");
+  testStates(input, STATE_OFFSCREEN, 0, STATE_INVISIBLE);
+
+  // scrolled off item (twice)
+  let lastLi = getAcc("li_last");
+  testStates(lastLi, STATE_OFFSCREEN, 0, STATE_INVISIBLE);
+
+  // scroll into view the item
+  await SpecialPowers.spawn(browser, [], () => {
+    content.document.getElementById("li_last").scrollIntoView(true);
+  });
+  testStates(lastLi, 0, 0, STATE_OFFSCREEN | STATE_INVISIBLE);
+
+  // first item is scrolled off now (testcase for bug 768786)
+  let firstLi = getAcc("li_first");
+  testStates(firstLi, STATE_OFFSCREEN, 0, STATE_INVISIBLE);
+
+  let newTab = await BrowserTestUtils.openNewForegroundTab(gBrowser);
+  // Accessibles in background tab should have offscreen state and no
+  // invisible state.
+  testStates(getAcc("div"), STATE_OFFSCREEN, 0, STATE_INVISIBLE);
+  BrowserTestUtils.removeTab(newTab);
+}
+
+addAccessibleTask(
+  `
+  <div id="div" style="border:2px solid blue; width: 500px; height: 110vh;"></div>
+  <input id="input_scrolledoff">
+  <ul style="border:2px solid red; width: 100px; height: 50px; overflow: auto;">
+    <li id="li_first">item1</li><li>item2</li><li>item3</li>
+    <li>item4</li><li>item5</li><li id="li_last">item6</li>
+  </ul>`,
+  runTest
+);
diff --git a/accessible/tests/browser/states/head.js b/accessible/tests/browser/states/head.js
new file mode 100644
index 0000000000..f9d7393229
--- /dev/null
+++ b/accessible/tests/browser/states/head.js
@@ -0,0 +1,81 @@
+/* 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";
+
+/* exported waitForIFrameA11yReady, waitForIFrameUpdates, spawnTestStates */
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+// This is another version of addA11yLoadEvent for fission.
+async function waitForIFrameA11yReady(iFrameBrowsingContext) {
+  await SimpleTest.promiseFocus(window);
+
+  await SpecialPowers.spawn(iFrameBrowsingContext, [], () => {
+    return new Promise(resolve => {
+      function waitForDocLoad() {
+        SpecialPowers.executeSoon(() => {
+          const acc = SpecialPowers.Cc[
+            "@mozilla.org/accessibilityService;1"
+          ].getService(SpecialPowers.Ci.nsIAccessibilityService);
+
+          const accDoc = acc.getAccessibleFor(content.document);
+          let state = {};
+          accDoc.getState(state, {});
+          if (state.value & SpecialPowers.Ci.nsIAccessibleStates.STATE_BUSY) {
+            SpecialPowers.executeSoon(waitForDocLoad);
+            return;
+          }
+          resolve();
+        }, 0);
+      }
+      waitForDocLoad();
+    });
+  });
+}
+
+// A utility function to make sure the information of scroll position or visible
+// area changes reach to out-of-process iframes.
+async function waitForIFrameUpdates() {
+  // Wait for two frames since the information is notified via asynchronous IPC
+  // calls.
+  await new Promise(resolve => requestAnimationFrame(resolve));
+  await new Promise(resolve => requestAnimationFrame(resolve));
+}
+
+// A utility function to test the state of |elementId| element in out-of-process
+// |browsingContext|.
+async function spawnTestStates(browsingContext, elementId, expectedStates) {
+  function testStates(id, expected, unexpected) {
+    const acc = SpecialPowers.Cc[
+      "@mozilla.org/accessibilityService;1"
+    ].getService(SpecialPowers.Ci.nsIAccessibilityService);
+    const target = content.document.getElementById(id);
+    let state = {};
+    acc.getAccessibleFor(target).getState(state, {});
+    if (expected === 0) {
+      Assert.equal(state.value, expected);
+    } else {
+      Assert.ok(state.value & expected);
+    }
+    Assert.ok(!(state.value & unexpected));
+  }
+  await SpecialPowers.spawn(
+    browsingContext,
+    [elementId, expectedStates],
+    testStates
+  );
+}
diff --git a/accessible/tests/browser/states/target.html b/accessible/tests/browser/states/target.html
new file mode 100644
index 0000000000..0412c13d53
--- /dev/null
+++ b/accessible/tests/browser/states/target.html
@@ -0,0 +1,3 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<div id="target">target</div>
diff --git a/accessible/tests/browser/states/test_deck_has_out_of_process_iframe.xhtml b/accessible/tests/browser/states/test_deck_has_out_of_process_iframe.xhtml
new file mode 100644
index 0000000000..72d93ca30a
--- /dev/null
+++ b/accessible/tests/browser/states/test_deck_has_out_of_process_iframe.xhtml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml"
+        title="XUL elements visibility states testing">
+<deck id="deck" selectedIndex="0">
+  <iframe id="first" flex="1"/>
+  <iframe id="second" flex="1"/>
+</deck>
+</window>
diff --git a/accessible/tests/browser/telemetry/browser.ini b/accessible/tests/browser/telemetry/browser.ini
new file mode 100644
index 0000000000..8a6381f19f
--- /dev/null
+++ b/accessible/tests/browser/telemetry/browser.ini
@@ -0,0 +1,3 @@
+[browser_HCM_telemetry.js]
+support-files =
+  !/browser/components/preferences/tests/head.js
diff --git a/accessible/tests/browser/telemetry/browser_HCM_telemetry.js b/accessible/tests/browser/telemetry/browser_HCM_telemetry.js
new file mode 100644
index 0000000000..d9c48f5942
--- /dev/null
+++ b/accessible/tests/browser/telemetry/browser_HCM_telemetry.js
@@ -0,0 +1,177 @@
+/* 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-globals-from ../../../../browser/components/preferences/tests/head.js */
+
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/browser/components/preferences/tests/head.js",
+  this
+);
+
+ChromeUtils.import("resource://testing-common/TelemetryTestUtils.jsm", this);
+
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("browser.display.document_color_use");
+  Services.prefs.clearUserPref("browser.display.permit_backplate");
+  Services.telemetry.clearEvents();
+});
+
+async function openColorsDialog() {
+  await openPreferencesViaOpenPreferencesAPI("general", { leaveOpen: true });
+  const colorsButton = gBrowser.selectedBrowser.contentDocument.getElementById(
+    "colors"
+  );
+
+  const dialogOpened = promiseLoadSubDialog(
+    "chrome://browser/content/preferences/dialogs/colors.xhtml"
+  );
+  colorsButton.doCommand();
+
+  return dialogOpened;
+}
+
+async function closeColorsDialog(dialogWin) {
+  const dialogClosed = BrowserTestUtils.waitForEvent(dialogWin, "unload");
+  dialogWin.document
+    .getElementById("ColorsDialog")
+    .getButton("accept")
+    .doCommand();
+  return dialogClosed;
+}
+
+function verifyBackplate(expectedValue) {
+  const snapshot = TelemetryTestUtils.getProcessScalars("parent", false, true);
+  ok("a11y.backplate" in snapshot, "Backplate scalar must be present.");
+  is(
+    snapshot["a11y.backplate"],
+    expectedValue,
+    "Backplate scalar is logged as " + expectedValue
+  );
+}
+
+add_task(async function testInit() {
+  const dialogWin = await openColorsDialog();
+  const menulistHCM = dialogWin.document.getElementById("useDocumentColors");
+  if (AppConstants.platform == "win") {
+    is(
+      menulistHCM.value,
+      "0",
+      "HCM menulist should be set to only with HCM theme on startup for windows"
+    );
+
+    // Verify correct default value on windows
+    TelemetryTestUtils.assertKeyedScalar(
+      TelemetryTestUtils.getProcessScalars("parent", true, true),
+      "a11y.theme",
+      "default",
+      false
+    );
+  } else {
+    is(
+      menulistHCM.value,
+      "1",
+      "HCM menulist should be set to never on startup for non-windows platforms"
+    );
+
+    // Verify correct default value on non-windows
+    TelemetryTestUtils.assertKeyedScalar(
+      TelemetryTestUtils.getProcessScalars("parent", true, true),
+      "a11y.theme",
+      "always",
+      false
+    );
+  }
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function testSetAlways() {
+  const dialogWin = await openColorsDialog();
+  const menulistHCM = dialogWin.document.getElementById("useDocumentColors");
+
+  menulistHCM.doCommand();
+  const newOption = dialogWin.document.getElementById("documentColorAlways");
+  newOption.click();
+
+  is(menulistHCM.value, "2", "HCM menulist should be set to always");
+
+  await closeColorsDialog(dialogWin);
+
+  // Verify correct initial value
+  TelemetryTestUtils.assertKeyedScalar(
+    TelemetryTestUtils.getProcessScalars("parent", true, true),
+    "a11y.theme",
+    "never",
+    false
+  );
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function testSetDefault() {
+  const dialogWin = await openColorsDialog();
+  const menulistHCM = dialogWin.document.getElementById("useDocumentColors");
+
+  menulistHCM.doCommand();
+  const newOption = dialogWin.document.getElementById("documentColorAutomatic");
+  newOption.click();
+
+  is(menulistHCM.value, "0", "HCM menulist should be set to default");
+
+  await closeColorsDialog(dialogWin);
+
+  // Verify correct initial value
+  TelemetryTestUtils.assertKeyedScalar(
+    TelemetryTestUtils.getProcessScalars("parent", true, true),
+    "a11y.theme",
+    "default",
+    false
+  );
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function testSetNever() {
+  const dialogWin = await openColorsDialog();
+  const menulistHCM = dialogWin.document.getElementById("useDocumentColors");
+
+  menulistHCM.doCommand();
+  const newOption = dialogWin.document.getElementById("documentColorNever");
+  newOption.click();
+
+  is(menulistHCM.value, "1", "HCM menulist should be set to never");
+
+  await closeColorsDialog(dialogWin);
+
+  // Verify correct initial value
+  TelemetryTestUtils.assertKeyedScalar(
+    TelemetryTestUtils.getProcessScalars("parent", true, true),
+    "a11y.theme",
+    "always",
+    false
+  );
+
+  gBrowser.removeCurrentTab();
+});
+
+// XXX We're uable to assert scalars that are false using assertScalar util,
+// so we directly query the scalar in the scalar list below. (bug 1633883)
+
+add_task(async function testBackplate() {
+  is(
+    Services.prefs.getBoolPref("browser.display.permit_backplate"),
+    true,
+    "Backplate is init'd to true"
+  );
+
+  Services.prefs.setBoolPref("browser.display.permit_backplate", false);
+  // Verify correct recorded value
+  verifyBackplate(false);
+
+  Services.prefs.setBoolPref("browser.display.permit_backplate", true);
+  // Verify correct recorded value
+  verifyBackplate(true);
+});
diff --git a/accessible/tests/browser/tree/browser.ini b/accessible/tests/browser/tree/browser.ini
new file mode 100644
index 0000000000..8072f55c37
--- /dev/null
+++ b/accessible/tests/browser/tree/browser.ini
@@ -0,0 +1,11 @@
+[DEFAULT]
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/browser/*.jsm
+
+[browser_aria_owns.js]
+skip-if = true || (verify && !debug && (os == 'linux')) #Bug 1445513
+[browser_searchbar.js]
+[browser_shadowdom.js]
diff --git a/accessible/tests/browser/tree/browser_aria_owns.js b/accessible/tests/browser/tree/browser_aria_owns.js
new file mode 100644
index 0000000000..084ac83fea
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_aria_owns.js
@@ -0,0 +1,278 @@
+/* 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";
+
+let NO_MOVE = { unexpected: [[EVENT_REORDER, "container"]] };
+let MOVE = { expected: [[EVENT_REORDER, "container"]] };
+
+// Set last ordinal child as aria-owned, should produce no reorder.
+addAccessibleTask(
+  `<ul id="container"><li id="a">Test</li></ul>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function() {
+      // aria-own ordinal child in place, should be a no-op.
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a");
+    });
+
+    testChildrenIds(containerAcc, ["a"]);
+  }
+);
+
+// Add a new ordinal child to a container with an aria-owned child.
+// Order should respect aria-owns.
+addAccessibleTask(
+  `<ul id="container"><li id="a">Test</li></ul>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, MOVE, function() {
+      let container = content.document.getElementById("container");
+      container.setAttribute("aria-owns", "a");
+
+      let aa = content.document.createElement("li");
+      aa.id = "aa";
+      container.appendChild(aa);
+    });
+
+    testChildrenIds(containerAcc, ["aa", "a"]);
+
+    await contentSpawnMutation(browser, MOVE, function() {
+      content.document.getElementById("container").removeAttribute("aria-owns");
+    });
+
+    testChildrenIds(containerAcc, ["a", "aa"]);
+  }
+);
+
+// Remove a no-move aria-owns attribute, should result in a no-move.
+addAccessibleTask(
+  `<ul id="container" aria-owns="a"><li id="a">Test</li></ul>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function() {
+      // remove aria-owned child that is already ordinal, should be no-op.
+      content.document.getElementById("container").removeAttribute("aria-owns");
+    });
+
+    testChildrenIds(containerAcc, ["a"]);
+  }
+);
+
+// Attempt to steal an aria-owned child. The attempt should fail.
+addAccessibleTask(
+  `
+  <ul>
+    <li id="a">Test</li>
+  </ul>
+  <ul aria-owns="a"></ul>
+  <ul id="container"></ul>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, []);
+
+    await contentSpawnMutation(browser, NO_MOVE, function() {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a");
+    });
+
+    testChildrenIds(containerAcc, []);
+  }
+);
+
+// Don't aria-own children of <select>
+addAccessibleTask(
+  `
+  <div id="container" role="group" aria-owns="b"></div>
+  <select id="select">
+    <option id="a"></option>
+    <option id="b"></option>
+  </select>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+    let selectAcc = findAccessibleChildByID(accDoc, "select");
+
+    testChildrenIds(containerAcc, []);
+    testChildrenIds(selectAcc.firstChild, ["a", "b"]);
+  }
+);
+
+// Don't allow <select> to aria-own
+addAccessibleTask(
+  `
+  <div id="container" role="group">
+    <div id="a"></div>
+    <div id="b"></div>
+  </div>
+  <select id="select" aria-owns="a">
+    <option id="c"></option>
+  </select>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+    let selectAcc = findAccessibleChildByID(accDoc, "select");
+
+    testChildrenIds(containerAcc, ["a", "b"]);
+    testChildrenIds(selectAcc.firstChild, ["c"]);
+  }
+);
+
+// Don't allow one <select> to aria-own an <option> from another <select>.
+addAccessibleTask(
+  `
+  <select id="select1" aria-owns="c">
+    <option id="a"></option>
+    <option id="b"></option>
+  </select>
+  <select id="select2">
+    <option id="c"></option>
+  </select>`,
+  async function(browser, accDoc) {
+    let selectAcc1 = findAccessibleChildByID(accDoc, "select1");
+    let selectAcc2 = findAccessibleChildByID(accDoc, "select2");
+
+    testChildrenIds(selectAcc1.firstChild, ["a", "b"]);
+    testChildrenIds(selectAcc2.firstChild, ["c"]);
+  }
+);
+
+// Don't allow a <select> to reorder its children with aria-owns.
+addAccessibleTask(
+  `
+  <select id="container" aria-owns="c b a">
+    <option id="a"></option>
+    <option id="b"></option>
+    <option id="c"></option>
+  </select>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc.firstChild, ["a", "b", "c"]);
+
+    await contentSpawnMutation(browser, NO_MOVE, function() {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "a c b");
+    });
+
+    testChildrenIds(containerAcc.firstChild, ["a", "b", "c"]);
+  }
+);
+
+// Don't crash if ID in aria-owns does not exist
+addAccessibleTask(
+  `
+  <select id="container" aria-owns="boom" multiple></select>`,
+  async function(browser, accDoc) {
+    ok(true, "Did not crash");
+  }
+);
+
+addAccessibleTask(
+  `
+  <ul id="one">
+    <li id="a">Test</li>
+    <li id="b">Test 2</li>
+    <li id="c">Test 3</li>
+  </ul>
+  <ul id="two"></ul>`,
+  async function(browser, accDoc) {
+    let one = findAccessibleChildByID(accDoc, "one");
+    let two = findAccessibleChildByID(accDoc, "two");
+
+    let waitfor = {
+      expected: [
+        [EVENT_REORDER, "one"],
+        [EVENT_REORDER, "two"],
+      ],
+    };
+
+    await contentSpawnMutation(browser, waitfor, function() {
+      // Put same id twice in aria-owns
+      content.document.getElementById("two").setAttribute("aria-owns", "a a");
+    });
+
+    testChildrenIds(one, ["b", "c"]);
+    testChildrenIds(two, ["a"]);
+
+    await contentSpawnMutation(browser, waitfor, function() {
+      // If the previous double-id aria-owns worked correctly, we should
+      // be in a good state and all is fine..
+      content.document.getElementById("two").setAttribute("aria-owns", "a b");
+    });
+
+    testChildrenIds(one, ["c"]);
+    testChildrenIds(two, ["a", "b"]);
+  }
+);
+
+addAccessibleTask(`<div id="a"></div><div id="b"></div>`, async function(
+  browser,
+  accDoc
+) {
+  testChildrenIds(accDoc, ["a", "b"]);
+
+  let waitFor = {
+    expected: [[EVENT_REORDER, e => e.accessible == accDoc]],
+  };
+
+  await contentSpawnMutation(browser, waitFor, function() {
+    content.document.documentElement.style.display = "none";
+    content.document.documentElement.getBoundingClientRect();
+    content.document.body.setAttribute("aria-owns", "b a");
+    content.document.documentElement.remove();
+  });
+
+  testChildrenIds(accDoc, []);
+});
+
+// Don't allow ordinal child to be placed after aria-owned child (bug 1405796)
+addAccessibleTask(
+  `<div id="container"><div id="a">Hello</div></div>
+                   <div><div id="c">There</div><div id="d">There</div></div>`,
+  async function(browser, accDoc) {
+    let containerAcc = findAccessibleChildByID(accDoc, "container");
+
+    testChildrenIds(containerAcc, ["a"]);
+
+    await contentSpawnMutation(browser, MOVE, function() {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "c");
+    });
+
+    testChildrenIds(containerAcc, ["a", "c"]);
+
+    await contentSpawnMutation(browser, MOVE, function() {
+      let span = content.document.createElement("span");
+      content.document.getElementById("container").appendChild(span);
+
+      let b = content.document.createElement("div");
+      b.id = "b";
+      content.document.getElementById("container").appendChild(b);
+    });
+
+    testChildrenIds(containerAcc, ["a", "b", "c"]);
+
+    await contentSpawnMutation(browser, MOVE, function() {
+      content.document
+        .getElementById("container")
+        .setAttribute("aria-owns", "c d");
+    });
+
+    testChildrenIds(containerAcc, ["a", "b", "c", "d"]);
+  }
+);
diff --git a/accessible/tests/browser/tree/browser_searchbar.js b/accessible/tests/browser/tree/browser_searchbar.js
new file mode 100644
index 0000000000..e41ba9819d
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_searchbar.js
@@ -0,0 +1,52 @@
+"use strict";
+
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+// eslint-disable-next-line camelcase
+add_task(async function test_searchbar_a11y_tree() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.search.widget.inNavBar", true]],
+  });
+
+  let searchbar = await TestUtils.waitForCondition(
+    () => document.getElementById("searchbar"),
+    "wait for search bar to appear"
+  );
+
+  // Make sure the popup has been rendered so it shows up in the a11y tree.
+  let popup = document.getElementById("PopupSearchAutoComplete");
+  let promise = BrowserTestUtils.waitForEvent(popup, "popupshown", false);
+  searchbar.textbox.openPopup();
+  await promise;
+
+  promise = BrowserTestUtils.waitForEvent(popup, "popuphidden", false);
+  searchbar.textbox.closePopup();
+  await promise;
+
+  const TREE = {
+    role: ROLE_EDITCOMBOBOX,
+
+    children: [
+      // input element
+      {
+        role: ROLE_ENTRY,
+        children: [],
+      },
+
+      // context menu
+      {
+        role: ROLE_COMBOBOX_LIST,
+        children: [],
+      },
+
+      // result list
+      {
+        role: ROLE_GROUPING,
+        // not testing the structure inside the result list
+      },
+    ],
+  };
+
+  testAccessibleTree(searchbar, TREE);
+});
diff --git a/accessible/tests/browser/tree/browser_shadowdom.js b/accessible/tests/browser/tree/browser_shadowdom.js
new file mode 100644
index 0000000000..728284d3e2
--- /dev/null
+++ b/accessible/tests/browser/tree/browser_shadowdom.js
@@ -0,0 +1,64 @@
+/* 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 REORDER = { expected: [[EVENT_REORDER, "container"]] };
+
+// Dynamically inserted slotted accessible elements should be in
+// the accessible tree.
+const snippet = `
+<script>
+customElements.define("x-el", class extends HTMLElement {
+  constructor() {
+    super();
+    this.attachShadow({ mode: "open" });
+    this.shadowRoot.innerHTML =
+      "<div role='presentation'><slot></slot></div>";
+  }
+});
+</script>
+<x-el id="container" role="group"><label id="l1">label1</label></x-el>
+`;
+
+addAccessibleTask(snippet, async function(browser, accDoc) {
+  let container = findAccessibleChildByID(accDoc, "container");
+
+  testChildrenIds(container, ["l1"]);
+
+  await contentSpawnMutation(browser, REORDER, function() {
+    let labelEl = content.document.createElement("label");
+    labelEl.id = "l2";
+
+    let containerEl = content.document.getElementById("container");
+    containerEl.appendChild(labelEl);
+  });
+
+  testChildrenIds(container, ["l1", "l2"]);
+});
+
+// Dynamically inserted not accessible custom element containing an accessible
+// in its shadow DOM.
+const snippet2 = `
+<script>
+customElements.define("x-el2", class extends HTMLElement {
+  constructor() {
+    super();
+    this.attachShadow({ mode: "open" });
+    this.shadowRoot.innerHTML = "<input id='input'>";
+  }
+});
+</script>
+<div role="group" id="container"></div>
+`;
+
+addAccessibleTask(snippet2, async function(browser, accDoc) {
+  let container = findAccessibleChildByID(accDoc, "container");
+
+  await contentSpawnMutation(browser, REORDER, function() {
+    content.document.getElementById("container").innerHTML = "<x-el2></x-el2>";
+  });
+
+  testChildrenIds(container, ["input"]);
+});
diff --git a/accessible/tests/browser/tree/head.js b/accessible/tests/browser/tree/head.js
new file mode 100644
index 0000000000..867a1b1417
--- /dev/null
+++ b/accessible/tests/browser/tree/head.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";
+
+/* exported testChildrenIds */
+
+// Load the shared-head file first.
+/* import-globals-from ../shared-head.js */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+/*
+ * A test function for comparing the IDs of an accessible's children
+ * with an expected array of IDs.
+ */
+function testChildrenIds(acc, expectedIds) {
+  let ids = arrayFromChildren(acc).map(child => getAccessibleDOMNodeID(child));
+  Assert.deepEqual(
+    ids,
+    expectedIds,
+    `Children for ${getAccessibleDOMNodeID(acc)} are wrong.`
+  );
+}