Adding upstream version 86.0.1.upstream/86.0.1upstream

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

33 files changed, 5385 insertions, 0 deletions

diff --git a/accessible/xpcom/AccEventGen.py b/accessible/xpcom/AccEventGen.py
new file mode 100755
index 0000000000..ef253bd2a9
--- /dev/null
+++ b/accessible/xpcom/AccEventGen.py
@@ -0,0 +1,258 @@
+#!/usr/bin/env python
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import absolute_import
+import os
+
+import buildconfig
+import mozpack.path as mozpath
+
+from xpidl import xpidl
+
+# Load the webidl configuration file.
+glbl = {}
+exec(
+    open(
+        mozpath.join(buildconfig.topsrcdir, "dom", "bindings", "Bindings.conf")
+    ).read(),
+    glbl,
+)
+webidlconfig = glbl["DOMInterfaces"]
+
+# Instantiate the parser.
+p = xpidl.IDLParser()
+
+
+def findIDL(includePath, interfaceFileName):
+    for d in includePath:
+        path = mozpath.join(d, interfaceFileName)
+        if os.path.exists(path):
+            return path
+    raise BaseException(
+        "No IDL file found for interface %s "
+        "in include path %r" % (interfaceFileName, includePath)
+    )
+
+
+def loadEventIDL(parser, includePath, eventname):
+    eventidl = "nsIAccessible%s.idl" % eventname
+    idlFile = findIDL(includePath, eventidl)
+    idl = p.parse(open(idlFile).read(), idlFile)
+    idl.resolve(includePath, p, webidlconfig)
+    return idl, idlFile
+
+
+class Configuration:
+    def __init__(self, filename):
+        config = {}
+        exec(open(filename).read(), config)
+        self.simple_events = config.get("simple_events", [])
+
+
+def firstCap(str):
+    return str[0].upper() + str[1:]
+
+
+def writeAttributeParams(a):
+    return "%s a%s" % (a.realtype.nativeType("in"), firstCap(a.name))
+
+
+def print_header_file(fd, conf, incdirs):
+    idl_paths = set()
+
+    fd.write("/* THIS FILE IS AUTOGENERATED - DO NOT EDIT */\n")
+    fd.write(
+        "#ifndef _mozilla_a11y_generated_AccEvents_h_\n"
+        "#define _mozilla_a11y_generated_AccEvents_h_\n\n"
+    )
+    fd.write('#include "nscore.h"\n')
+    fd.write('#include "nsCOMPtr.h"\n')
+    fd.write('#include "nsCycleCollectionParticipant.h"\n')
+    fd.write('#include "nsString.h"\n')
+    for e in conf.simple_events:
+        fd.write('#include "nsIAccessible%s.h"\n' % e)
+    for e in conf.simple_events:
+        idl, idl_path = loadEventIDL(p, incdirs, e)
+        idl_paths.add(idl_path)
+        for iface in filter(lambda p: p.kind == "interface", idl.productions):
+            classname = "xpcAcc%s" % e
+            baseinterfaces = interfaces(iface)
+
+            fd.write("\nclass %s final : public %s\n" % (classname, iface.name))
+            fd.write("{\n")
+            fd.write("public:\n")
+
+            attributes = allAttributes(iface)
+            args = map(writeAttributeParams, attributes)
+            fd.write("  %s(%s) :\n" % (classname, ", ".join(args)))
+
+            initializers = []
+            for a in attributes:
+                initializers.append("m%s(a%s)" % (firstCap(a.name), firstCap(a.name)))
+            fd.write("  %s\n  {}\n\n" % ", ".join(initializers))
+            fd.write("  NS_DECL_CYCLE_COLLECTING_ISUPPORTS\n")
+            fd.write("  NS_DECL_CYCLE_COLLECTION_CLASS(%s)\n" % (classname))
+
+            for iface in filter(lambda i: i.name != "nsISupports", baseinterfaces):
+                fd.write("  NS_DECL_%s\n" % iface.name.upper())
+
+            fd.write("\nprivate:\n")
+            fd.write("  ~%s() {}\n\n" % classname)
+            for a in attributes:
+                fd.write("  %s\n" % attributeVariableTypeAndName(a))
+            fd.write("};\n\n")
+
+    fd.write("#endif\n")
+
+    return idl_paths
+
+
+def interfaceAttributeTypes(idl):
+    ifaces = filter(lambda p: p.kind == "interface", idl.productions)
+    attributes = []
+    for i in ifaces:
+        ifaceAttributes = allAttributes(i)
+        attributes.extend(ifaceAttributes)
+    ifaceAttrs = filter(lambda a: a.realtype.nativeType("in").endswith("*"), attributes)
+    return map(lambda a: a.realtype.nativeType("in").strip(" *"), ifaceAttrs)
+
+
+def print_cpp(idl, fd, conf, eventname):
+    for p in idl.productions:
+        if p.kind == "interface":
+            write_cpp(eventname, p, fd)
+
+
+def print_cpp_file(fd, conf, incdirs):
+    idl_paths = set()
+    fd.write("/* THIS FILE IS AUTOGENERATED - DO NOT EDIT */\n\n")
+    fd.write('#include "xpcAccEvents.h"\n')
+
+    includes = []
+    for e in conf.simple_events:
+        if e not in includes:
+            includes.append(("nsIAccessible%s" % e))
+
+    types = []
+    for e in conf.simple_events:
+        idl, idl_path = loadEventIDL(p, incdirs, e)
+        idl_paths.add(idl_path)
+        types.extend(interfaceAttributeTypes(idl))
+
+    for c in types:
+        fd.write('#include "%s.h"\n' % c)
+
+    fd.write("\n")
+    for e in conf.simple_events:
+        idl, idl_path = loadEventIDL(p, incdirs, e)
+        idl_paths.add(idl_path)
+        print_cpp(idl, fd, conf, e)
+
+    return idl_paths
+
+
+def attributeVariableTypeAndName(a):
+    if a.realtype.nativeType("in").endswith("*"):
+        l = [
+            "nsCOMPtr<%s> m%s;"
+            % (a.realtype.nativeType("in").strip("* "), firstCap(a.name))
+        ]
+    elif a.realtype.nativeType("in").count("nsAString"):
+        l = ["nsString m%s;" % firstCap(a.name)]
+    elif a.realtype.nativeType("in").count("nsACString"):
+        l = ["nsCString m%s;" % firstCap(a.name)]
+    else:
+        l = ["%sm%s;" % (a.realtype.nativeType("in"), firstCap(a.name))]
+    return ", ".join(l)
+
+
+def writeAttributeGetter(fd, classname, a):
+    fd.write("NS_IMETHODIMP\n")
+    fd.write("%s::Get%s(" % (classname, firstCap(a.name)))
+    if a.realtype.nativeType("in").endswith("*"):
+        fd.write(
+            "%s** a%s" % (a.realtype.nativeType("in").strip("* "), firstCap(a.name))
+        )
+    elif a.realtype.nativeType("in").count("nsAString"):
+        fd.write("nsAString& a%s" % firstCap(a.name))
+    elif a.realtype.nativeType("in").count("nsACString"):
+        fd.write("nsACString& a%s" % firstCap(a.name))
+    else:
+        fd.write("%s*a%s" % (a.realtype.nativeType("in"), firstCap(a.name)))
+    fd.write(")\n")
+    fd.write("{\n")
+    if a.realtype.nativeType("in").endswith("*"):
+        fd.write("  NS_IF_ADDREF(*a%s = m%s);\n" % (firstCap(a.name), firstCap(a.name)))
+    elif a.realtype.nativeType("in").count("nsAString"):
+        fd.write("  a%s = m%s;\n" % (firstCap(a.name), firstCap(a.name)))
+    elif a.realtype.nativeType("in").count("nsACString"):
+        fd.write("  a%s = m%s;\n" % (firstCap(a.name), firstCap(a.name)))
+    else:
+        fd.write("  *a%s = m%s;\n" % (firstCap(a.name), firstCap(a.name)))
+    fd.write("  return NS_OK;\n")
+    fd.write("}\n\n")
+
+
+def interfaces(iface):
+    interfaces = []
+    while iface.base:
+        interfaces.append(iface)
+        iface = iface.idl.getName(xpidl.TypeId(iface.base), iface.location)
+    interfaces.append(iface)
+    interfaces.reverse()
+    return interfaces
+
+
+def allAttributes(iface):
+    attributes = []
+    for i in interfaces(iface):
+        attrs = filter(lambda m: isinstance(m, xpidl.Attribute), i.members)
+        attributes.extend(attrs)
+
+    return attributes
+
+
+def write_cpp(eventname, iface, fd):
+    classname = "xpcAcc%s" % eventname
+    attributes = allAttributes(iface)
+    ccattributes = filter(
+        lambda m: m.realtype.nativeType("in").endswith("*"), attributes
+    )
+    fd.write("NS_IMPL_CYCLE_COLLECTION(%s" % classname)
+    for c in ccattributes:
+        fd.write(", m%s" % firstCap(c.name))
+    fd.write(")\n\n")
+
+    fd.write("NS_IMPL_CYCLE_COLLECTING_ADDREF(%s)\n" % classname)
+    fd.write("NS_IMPL_CYCLE_COLLECTING_RELEASE(%s)\n\n" % classname)
+
+    fd.write("NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(%s)\n" % classname)
+    for baseiface in interfaces(iface):
+        fd.write("  NS_INTERFACE_MAP_ENTRY(%s)\n" % baseiface.name)
+    fd.write("NS_INTERFACE_MAP_END\n\n")
+
+    for a in attributes:
+        writeAttributeGetter(fd, classname, a)
+
+
+def get_conf(conf_file):
+    conf = Configuration(conf_file)
+    inc_dir = [
+        mozpath.join(buildconfig.topsrcdir, "accessible", "interfaces"),
+        mozpath.join(buildconfig.topsrcdir, "xpcom", "base"),
+    ]
+    return conf, inc_dir
+
+
+def gen_files(fd, conf_file):
+    deps = set()
+    conf, inc_dir = get_conf(conf_file)
+    deps.update(print_header_file(fd, conf, inc_dir))
+    with open(
+        os.path.join(os.path.dirname(fd.name), "xpcAccEvents.cpp"), "w"
+    ) as cpp_fd:
+        deps.update(print_cpp_file(cpp_fd, conf, inc_dir))
+    return deps
diff --git a/accessible/xpcom/AccEvents.conf b/accessible/xpcom/AccEvents.conf
new file mode 100644
index 0000000000..12d3604cd3
--- /dev/null
+++ b/accessible/xpcom/AccEvents.conf
@@ -0,0 +1,21 @@
+""" -*- Mode: Python -*-
+ This Source Code Form is subject to the terms of the Mozilla Public
+ License, v. 2.0. If a copy of the MPL was not distributed with this
+ file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+ The name of the event which real interface should have nsIAccessible-prefix,
+ and should be in nsIAccessible<name>.idl file"""
+
+simple_events = [
+    'Event',
+    'StateChangeEvent',
+    'TextChangeEvent',
+    'TextSelectionChangeEvent',
+    'HideEvent',
+    'CaretMoveEvent',
+    'ObjectAttributeChangedEvent',
+    'TableChangeEvent',
+    'VirtualCursorChangeEvent',
+    'ScrollingEvent',
+    'AnnouncementEvent'
+  ]
diff --git a/accessible/xpcom/moz.build b/accessible/xpcom/moz.build
new file mode 100644
index 0000000000..f45f3abcb2
--- /dev/null
+++ b/accessible/xpcom/moz.build
@@ -0,0 +1,81 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+UNIFIED_SOURCES += [
+    "nsAccessibleRelation.cpp",
+    "xpcAccessibilityService.cpp",
+    "xpcAccessible.cpp",
+    "xpcAccessibleApplication.cpp",
+    "xpcAccessibleDocument.cpp",
+    "xpcAccessibleGeneric.cpp",
+    "xpcAccessibleHyperLink.cpp",
+    "xpcAccessibleHyperText.cpp",
+    "xpcAccessibleImage.cpp",
+    "xpcAccessibleSelectable.cpp",
+    "xpcAccessibleTable.cpp",
+    "xpcAccessibleTableCell.cpp",
+    "xpcAccessibleTextRange.cpp",
+    "xpcAccessibleValue.cpp",
+]
+
+SOURCES += [
+    "!xpcAccEvents.cpp",
+]
+
+EXPORTS += [
+    "!xpcAccEvents.h",
+    "xpcAccessibilityService.h",
+]
+
+LOCAL_INCLUDES += [
+    "/accessible/base",
+    "/accessible/generic",
+]
+
+if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk":
+    LOCAL_INCLUDES += [
+        "/accessible/atk",
+    ]
+elif CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
+    LOCAL_INCLUDES += [
+        "/accessible/windows/msaa",
+    ]
+elif CONFIG["MOZ_WIDGET_TOOLKIT"] == "cocoa":
+    LOCAL_INCLUDES += [
+        "/accessible/ipc",
+        "/accessible/ipc/other",
+        "/accessible/mac",
+    ]
+    UNIFIED_SOURCES += ["xpcAccessibleMacInterface.mm"]
+    EXPORTS += [
+        "xpcAccessibleMacInterface.h",
+    ]
+elif CONFIG["MOZ_WIDGET_TOOLKIT"] == "android":
+    LOCAL_INCLUDES += [
+        "/accessible/android",
+    ]
+else:
+    LOCAL_INCLUDES += [
+        "/accessible/other",
+    ]
+
+
+GeneratedFile(
+    "xpcAccEvents.h",
+    "xpcAccEvents.cpp",
+    script="AccEventGen.py",
+    entry_point="gen_files",
+    inputs=[
+        "AccEvents.conf",
+    ],
+)
+
+FINAL_LIBRARY = "xul"
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+if CONFIG["CC_TYPE"] in ("clang", "gcc"):
+    CXXFLAGS += ["-Wno-error=shadow"]
diff --git a/accessible/xpcom/nsAccessibleRelation.cpp b/accessible/xpcom/nsAccessibleRelation.cpp
new file mode 100644
index 0000000000..933a394689
--- /dev/null
+++ b/accessible/xpcom/nsAccessibleRelation.cpp
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsAccessibleRelation.h"
+
+#include "Relation.h"
+#include "Accessible.h"
+#include "xpcAccessibleDocument.h"
+
+#include "nsArrayUtils.h"
+#include "nsComponentManagerUtils.h"
+
+using namespace mozilla::a11y;
+
+nsAccessibleRelation::nsAccessibleRelation(uint32_t aType, Relation* aRel)
+    : mType(aType) {
+  mTargets = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  Accessible* targetAcc = nullptr;
+  while ((targetAcc = aRel->Next()))
+    mTargets->AppendElement(static_cast<nsIAccessible*>(ToXPC(targetAcc)));
+}
+
+nsAccessibleRelation::nsAccessibleRelation(
+    uint32_t aType, const nsTArray<ProxyAccessible*>* aTargets)
+    : mType(aType) {
+  mTargets = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  for (uint32_t idx = 0; idx < aTargets->Length(); ++idx) {
+    mTargets->AppendElement(
+        static_cast<nsIAccessible*>(ToXPC(aTargets->ElementAt(idx))));
+  }
+}
+
+nsAccessibleRelation::~nsAccessibleRelation() {}
+
+// nsISupports
+NS_IMPL_ISUPPORTS(nsAccessibleRelation, nsIAccessibleRelation)
+
+// nsIAccessibleRelation
+NS_IMETHODIMP
+nsAccessibleRelation::GetRelationType(uint32_t* aType) {
+  NS_ENSURE_ARG_POINTER(aType);
+  *aType = mType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsAccessibleRelation::GetTargetsCount(uint32_t* aCount) {
+  NS_ENSURE_ARG_POINTER(aCount);
+  *aCount = 0;
+  return mTargets->GetLength(aCount);
+}
+
+NS_IMETHODIMP
+nsAccessibleRelation::GetTarget(uint32_t aIndex, nsIAccessible** aTarget) {
+  NS_ENSURE_ARG_POINTER(aTarget);
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIAccessible> target = do_QueryElementAt(mTargets, aIndex, &rv);
+  target.forget(aTarget);
+  return rv;
+}
+
+NS_IMETHODIMP
+nsAccessibleRelation::GetTargets(nsIArray** aTargets) {
+  NS_ENSURE_ARG_POINTER(aTargets);
+  NS_ADDREF(*aTargets = mTargets);
+  return NS_OK;
+}
diff --git a/accessible/xpcom/nsAccessibleRelation.h b/accessible/xpcom/nsAccessibleRelation.h
new file mode 100644
index 0000000000..ff51c33cd9
--- /dev/null
+++ b/accessible/xpcom/nsAccessibleRelation.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _nsAccessibleRelation_H_
+#define _nsAccessibleRelation_H_
+
+#include "nsIAccessibleRelation.h"
+
+#include "nsCOMPtr.h"
+#include "nsTArray.h"
+#include "nsIMutableArray.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/a11y/ProxyAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+class Relation;
+
+/**
+ * Class represents an accessible relation.
+ */
+class nsAccessibleRelation final : public nsIAccessibleRelation {
+ public:
+  nsAccessibleRelation(uint32_t aType, Relation* aRel);
+
+  nsAccessibleRelation(uint32_t aType,
+                       const nsTArray<ProxyAccessible*>* aTargets);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIACCESSIBLERELATION
+
+ private:
+  nsAccessibleRelation();
+  ~nsAccessibleRelation();
+
+  nsAccessibleRelation(const nsAccessibleRelation&);
+  nsAccessibleRelation& operator=(const nsAccessibleRelation&);
+
+  uint32_t mType;
+  nsCOMPtr<nsIMutableArray> mTargets;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibilityService.cpp b/accessible/xpcom/xpcAccessibilityService.cpp
new file mode 100644
index 0000000000..7362eb3ded
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibilityService.cpp
@@ -0,0 +1,270 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibilityService.h"
+
+#include "nsAccessiblePivot.h"
+#include "nsAccessibilityService.h"
+#include "Platform.h"
+#include "xpcAccessibleApplication.h"
+#include "xpcAccessibleDocument.h"
+
+#ifdef A11Y_LOG
+#  include "Logging.h"
+#endif
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+using namespace mozilla::dom;
+
+xpcAccessibilityService* xpcAccessibilityService::gXPCAccessibilityService =
+    nullptr;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+void xpcAccessibilityService::ShutdownCallback(nsITimer* aTimer,
+                                               void* aClosure) {
+  MaybeShutdownAccService(nsAccessibilityService::eXPCOM);
+  xpcAccessibilityService* xpcAccService =
+      reinterpret_cast<xpcAccessibilityService*>(aClosure);
+
+  if (xpcAccService->mShutdownTimer) {
+    xpcAccService->mShutdownTimer->Cancel();
+    xpcAccService->mShutdownTimer = nullptr;
+  }
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+xpcAccessibilityService::AddRef(void) {
+  MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(xpcAccessibilityService)
+  MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt");
+  if (!nsAutoRefCnt::isThreadSafe)
+    NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
+  nsrefcnt count = ++mRefCnt;
+  NS_LOG_ADDREF(this, count, "xpcAccessibilityService", sizeof(*this));
+
+  // We want refcount to be > 1 because one reference is added in the XPCOM
+  // accessibility service getter.
+  if (mRefCnt > 1) {
+    if (mShutdownTimer) {
+      mShutdownTimer->Cancel();
+      mShutdownTimer = nullptr;
+    }
+
+    GetOrCreateAccService(nsAccessibilityService::eXPCOM);
+  }
+
+  return count;
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+xpcAccessibilityService::Release(void) {
+  MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release");
+
+  if (!nsAutoRefCnt::isThreadSafe) {
+    NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
+  }
+
+  nsrefcnt count = --mRefCnt;
+  NS_LOG_RELEASE(this, count, "xpcAccessibilityService");
+
+  if (count == 0) {
+    if (!nsAutoRefCnt::isThreadSafe) {
+      NS_ASSERT_OWNINGTHREAD(xpcAccessibilityService);
+    }
+
+    mRefCnt = 1; /* stabilize */
+    delete (this);
+    return 0;
+  }
+
+  // When ref count goes down to 1 (held internally as a static reference),
+  // it means that there are no more external references to the
+  // xpcAccessibilityService and we can attempt to shut down acceessiblity
+  // service.
+  if (count == 1 && !mShutdownTimer) {
+    NS_NewTimerWithFuncCallback(
+        getter_AddRefs(mShutdownTimer), ShutdownCallback, this, 100,
+        nsITimer::TYPE_ONE_SHOT, "xpcAccessibilityService::Release");
+  }
+
+  return count;
+}
+
+NS_IMPL_QUERY_INTERFACE(xpcAccessibilityService, nsIAccessibilityService)
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetApplicationAccessible(
+    nsIAccessible** aAccessibleApplication) {
+  NS_ENSURE_ARG_POINTER(aAccessibleApplication);
+
+  NS_IF_ADDREF(*aAccessibleApplication = XPCApplicationAcc());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetAccessibleFor(nsINode* aNode,
+                                          nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+  if (!aNode) {
+    return NS_OK;
+  }
+
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  DocAccessible* document = accService->GetDocAccessible(aNode->OwnerDoc());
+  if (document) {
+    NS_IF_ADDREF(*aAccessible = ToXPC(document->GetAccessible(aNode)));
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetStringRole(uint32_t aRole, nsAString& aString) {
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  accService->GetStringRole(aRole, aString);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetStringStates(uint32_t aState, uint32_t aExtraState,
+                                         nsISupports** aStringStates) {
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  accService->GetStringStates(aState, aExtraState, aStringStates);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetStringEventType(uint32_t aEventType,
+                                            nsAString& aString) {
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  accService->GetStringEventType(aEventType, aString);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetStringRelationType(uint32_t aRelationType,
+                                               nsAString& aString) {
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  accService->GetStringRelationType(aRelationType, aString);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetAccessibleFromCache(nsINode* aNode,
+                                                nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+  if (!aNode) {
+    return NS_OK;
+  }
+
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  // Search for an accessible in each of our per document accessible object
+  // caches. If we don't find it, and the given node is itself a document, check
+  // our cache of document accessibles (document cache). Note usually shutdown
+  // document accessibles are not stored in the document cache, however an
+  // "unofficially" shutdown document (i.e. not from DocManager) can still
+  // exist in the document cache.
+  Accessible* accessible = accService->FindAccessibleInCache(aNode);
+  if (!accessible && aNode->IsDocument()) {
+    accessible = mozilla::a11y::GetExistingDocAccessible(aNode->AsDocument());
+  }
+
+  NS_IF_ADDREF(*aAccessible = ToXPC(accessible));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::CreateAccessiblePivot(nsIAccessible* aRoot,
+                                               nsIAccessiblePivot** aPivot) {
+  NS_ENSURE_ARG_POINTER(aPivot);
+  NS_ENSURE_ARG(aRoot);
+  *aPivot = nullptr;
+
+  Accessible* accessibleRoot = aRoot->ToInternalAccessible();
+  NS_ENSURE_TRUE(accessibleRoot, NS_ERROR_INVALID_ARG);
+
+  nsAccessiblePivot* pivot = new nsAccessiblePivot(accessibleRoot);
+  NS_ADDREF(*aPivot = pivot);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::SetLogging(const nsACString& aModules) {
+#ifdef A11Y_LOG
+  logging::Enable(PromiseFlatCString(aModules));
+#endif
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::IsLogged(const nsAString& aModule, bool* aIsLogged) {
+  NS_ENSURE_ARG_POINTER(aIsLogged);
+  *aIsLogged = false;
+
+#ifdef A11Y_LOG
+  *aIsLogged = logging::IsEnabled(aModule);
+#endif
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibilityService::GetConsumers(nsAString& aString) {
+  nsAccessibilityService* accService = GetAccService();
+  if (!accService) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  accService->GetConsumers(aString);
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NS_GetAccessibilityService
+////////////////////////////////////////////////////////////////////////////////
+
+nsresult NS_GetAccessibilityService(nsIAccessibilityService** aResult) {
+  NS_ENSURE_TRUE(aResult, NS_ERROR_NULL_POINTER);
+  *aResult = nullptr;
+
+  if (!GetOrCreateAccService(nsAccessibilityService::eXPCOM)) {
+    return NS_ERROR_SERVICE_NOT_AVAILABLE;
+  }
+
+  xpcAccessibilityService* service = new xpcAccessibilityService();
+  NS_ENSURE_TRUE(service, NS_ERROR_OUT_OF_MEMORY);
+  xpcAccessibilityService::gXPCAccessibilityService = service;
+  NS_ADDREF(*aResult = service);
+
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibilityService.h b/accessible/xpcom/xpcAccessibilityService.h
new file mode 100644
index 0000000000..04c23e7075
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibilityService.h
@@ -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/. */
+
+#ifndef mozilla_a11y_xpcAccessibilityService_h_
+#define mozilla_a11y_xpcAccessibilityService_h_
+
+#include "nsIAccessibilityService.h"
+#include "nsITimer.h"
+
+class xpcAccessibilityService : public nsIAccessibilityService {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIACCESSIBILITYSERVICE
+
+  /**
+   * Return true if xpc accessibility service is in use.
+   */
+  static bool IsInUse() {
+    // When ref count goes down to 1 (held internally as a static reference),
+    // it means that there are no more external references and thus it is not in
+    // use.
+    return gXPCAccessibilityService ? gXPCAccessibilityService->mRefCnt > 1
+                                    : false;
+  }
+
+ protected:
+  virtual ~xpcAccessibilityService() {
+    if (mShutdownTimer) {
+      mShutdownTimer->Cancel();
+      mShutdownTimer = nullptr;
+    }
+    gXPCAccessibilityService = nullptr;
+  }
+
+ private:
+  // xpcAccessibilityService creation is controlled by friend
+  // NS_GetAccessibilityService, keep constructor private.
+  xpcAccessibilityService() = default;
+
+  nsCOMPtr<nsITimer> mShutdownTimer;
+
+  /**
+   * Reference for xpc accessibility service instance.
+   */
+  static xpcAccessibilityService* gXPCAccessibilityService;
+
+  /**
+   * Used to shutdown nsAccessibilityService if xpcom accessible service is not
+   * in use any more.
+   */
+  static void ShutdownCallback(nsITimer* aTimer, void* aClosure);
+
+  friend nsresult NS_GetAccessibilityService(nsIAccessibilityService** aResult);
+};
+
+// for component registration
+// {3b265b69-f813-48ff-880d-d88d101af404}
+#define NS_ACCESSIBILITY_SERVICE_CID                 \
+  {                                                  \
+    0x3b265b69, 0xf813, 0x48ff, {                    \
+      0x88, 0x0d, 0xd8, 0x8d, 0x10, 0x1a, 0xf4, 0x04 \
+    }                                                \
+  }
+
+extern nsresult NS_GetAccessibilityService(nsIAccessibilityService** aResult);
+
+#endif
diff --git a/accessible/xpcom/xpcAccessible.cpp b/accessible/xpcom/xpcAccessible.cpp
new file mode 100644
index 0000000000..f3590a4ddc
--- /dev/null
+++ b/accessible/xpcom/xpcAccessible.cpp
@@ -0,0 +1,815 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "Accessible-inl.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "nsAccUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIAccessibleRelation.h"
+#include "nsIAccessibleRole.h"
+#include "nsAccessibleRelation.h"
+#include "Relation.h"
+#include "Role.h"
+#include "RootAccessible.h"
+#include "xpcAccessibleDocument.h"
+
+#include "nsIMutableArray.h"
+#include "nsPersistentProperties.h"
+
+#ifdef MOZ_WIDGET_COCOA
+#  include "xpcAccessibleMacInterface.h"
+#endif
+
+using namespace mozilla::a11y;
+
+NS_IMETHODIMP
+xpcAccessible::GetParent(nsIAccessible** aParent) {
+  NS_ENSURE_ARG_POINTER(aParent);
+  *aParent = nullptr;
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  AccessibleOrProxy parent = IntlGeneric().Parent();
+  NS_IF_ADDREF(*aParent = ToXPC(parent));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetNextSibling(nsIAccessible** aNextSibling) {
+  NS_ENSURE_ARG_POINTER(aNextSibling);
+  *aNextSibling = nullptr;
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (IntlGeneric().IsAccessible()) {
+    nsresult rv = NS_OK;
+    NS_IF_ADDREF(*aNextSibling = ToXPC(Intl()->GetSiblingAtOffset(1, &rv)));
+    return rv;
+  }
+
+  ProxyAccessible* proxy = IntlGeneric().AsProxy();
+  NS_ENSURE_STATE(proxy);
+
+  NS_IF_ADDREF(*aNextSibling = ToXPC(proxy->NextSibling()));
+  return *aNextSibling ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetPreviousSibling(nsIAccessible** aPreviousSibling) {
+  NS_ENSURE_ARG_POINTER(aPreviousSibling);
+  *aPreviousSibling = nullptr;
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (IntlGeneric().IsAccessible()) {
+    nsresult rv = NS_OK;
+    NS_IF_ADDREF(*aPreviousSibling =
+                     ToXPC(Intl()->GetSiblingAtOffset(-1, &rv)));
+    return rv;
+  }
+
+  ProxyAccessible* proxy = IntlGeneric().AsProxy();
+  NS_ENSURE_STATE(proxy);
+
+  NS_IF_ADDREF(*aPreviousSibling = ToXPC(proxy->PrevSibling()));
+  return *aPreviousSibling ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetFirstChild(nsIAccessible** aFirstChild) {
+  NS_ENSURE_ARG_POINTER(aFirstChild);
+  *aFirstChild = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aFirstChild = ToXPC(IntlGeneric().FirstChild()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetLastChild(nsIAccessible** aLastChild) {
+  NS_ENSURE_ARG_POINTER(aLastChild);
+  *aLastChild = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aLastChild = ToXPC(IntlGeneric().LastChild()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetChildCount(int32_t* aChildCount) {
+  NS_ENSURE_ARG_POINTER(aChildCount);
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  *aChildCount = IntlGeneric().ChildCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetChildAt(int32_t aChildIndex, nsIAccessible** aChild) {
+  NS_ENSURE_ARG_POINTER(aChild);
+  *aChild = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  // If child index is negative, then return last child.
+  // XXX: do we really need this?
+  if (aChildIndex < 0) aChildIndex = IntlGeneric().ChildCount() - 1;
+
+  AccessibleOrProxy child = IntlGeneric().ChildAt(aChildIndex);
+  if (child.IsNull()) return NS_ERROR_INVALID_ARG;
+
+  NS_ADDREF(*aChild = ToXPC(child));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetChildren(nsIArray** aChildren) {
+  NS_ENSURE_ARG_POINTER(aChildren);
+  *aChildren = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> children =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  uint32_t childCount = IntlGeneric().ChildCount();
+  for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
+    AccessibleOrProxy child = IntlGeneric().ChildAt(childIdx);
+    children->AppendElement(static_cast<nsIAccessible*>(ToXPC(child)));
+  }
+
+  children.forget(aChildren);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetIndexInParent(int32_t* aIndexInParent) {
+  NS_ENSURE_ARG_POINTER(aIndexInParent);
+  *aIndexInParent = -1;
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (IntlGeneric().IsAccessible()) {
+    *aIndexInParent = Intl()->IndexInParent();
+  } else if (IntlGeneric().IsProxy()) {
+    *aIndexInParent = IntlGeneric().AsProxy()->IndexInParent();
+  }
+
+  return *aIndexInParent != -1 ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetUniqueID(int64_t* aUniqueID) {
+  NS_ENSURE_ARG_POINTER(aUniqueID);
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (IntlGeneric().IsAccessible()) {
+    *aUniqueID = reinterpret_cast<uintptr_t>(Intl()->UniqueID());
+  } else if (IntlGeneric().IsProxy()) {
+    *aUniqueID = IntlGeneric().AsProxy()->ID();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetDOMNode(nsINode** aDOMNode) {
+  NS_ENSURE_ARG_POINTER(aDOMNode);
+  *aDOMNode = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsINode> node = Intl()->GetNode();
+  node.forget(aDOMNode);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetId(nsAString& aID) {
+  ProxyAccessible* proxy = IntlGeneric().AsProxy();
+  if (!proxy) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsString id;
+  proxy->DOMNodeID(id);
+  aID.Assign(id);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetDocument(nsIAccessibleDocument** aDocument) {
+  NS_ENSURE_ARG_POINTER(aDocument);
+  *aDocument = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aDocument = ToXPCDocument(Intl()->Document()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetRootDocument(nsIAccessibleDocument** aRootDocument) {
+  NS_ENSURE_ARG_POINTER(aRootDocument);
+  *aRootDocument = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aRootDocument = ToXPCDocument(Intl()->RootAccessible()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetRole(uint32_t* aRole) {
+  NS_ENSURE_ARG_POINTER(aRole);
+  *aRole = nsIAccessibleRole::ROLE_NOTHING;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  *aRole = IntlGeneric().Role();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetState(uint32_t* aState, uint32_t* aExtraState) {
+  NS_ENSURE_ARG_POINTER(aState);
+
+  if (IntlGeneric().IsNull())
+    nsAccUtils::To32States(states::DEFUNCT, aState, aExtraState);
+  else if (Intl())
+    nsAccUtils::To32States(Intl()->State(), aState, aExtraState);
+  else
+    nsAccUtils::To32States(IntlGeneric().AsProxy()->State(), aState,
+                           aExtraState);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetName(nsAString& aName) {
+  aName.Truncate();
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsAutoString name;
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+    proxy->Name(name);
+  } else {
+    Intl()->Name(name);
+  }
+
+  aName.Assign(name);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetDescription(nsAString& aDescription) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsAutoString desc;
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+    proxy->Description(desc);
+  } else {
+    Intl()->Description(desc);
+  }
+
+  aDescription.Assign(desc);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetLanguage(nsAString& aLanguage) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsAutoString lang;
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+    proxy->Language(lang);
+  } else {
+    Intl()->Language(lang);
+  }
+
+  aLanguage.Assign(lang);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetValue(nsAString& aValue) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsAutoString value;
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+    proxy->Value(value);
+  } else {
+    Intl()->Value(value);
+  }
+
+  aValue.Assign(value);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetHelp(nsAString& aHelp) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsAutoString help;
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->Help(help);
+#endif
+  } else {
+    Intl()->Help(help);
+  }
+
+  aHelp.Assign(help);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetAccessKey(nsAString& aAccessKey) {
+  aAccessKey.Truncate();
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->AccessKey().ToString(aAccessKey);
+#endif
+  } else {
+    Intl()->AccessKey().ToString(aAccessKey);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetKeyboardShortcut(nsAString& aKeyBinding) {
+  aKeyBinding.Truncate();
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->KeyboardShortcut().ToString(aKeyBinding);
+#endif
+  } else {
+    Intl()->KeyboardShortcut().ToString(aKeyBinding);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetAttributes(nsIPersistentProperties** aAttributes) {
+  NS_ENSURE_ARG_POINTER(aAttributes);
+  *aAttributes = nullptr;
+
+  if (IntlGeneric().IsNull()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (Accessible* acc = Intl()) {
+    nsCOMPtr<nsIPersistentProperties> attributes = acc->Attributes();
+    attributes.swap(*aAttributes);
+    return NS_OK;
+  }
+
+  ProxyAccessible* proxy = IntlGeneric().AsProxy();
+  AutoTArray<Attribute, 10> attrs;
+  proxy->Attributes(&attrs);
+
+  RefPtr<nsPersistentProperties> props = new nsPersistentProperties();
+  uint32_t attrCount = attrs.Length();
+  nsAutoString unused;
+  for (uint32_t i = 0; i < attrCount; i++) {
+    props->SetStringProperty(attrs[i].Name(), attrs[i].Value(), unused);
+  }
+
+  props.forget(aAttributes);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetNativeInterface(nsISupports** aNativeInterface) {
+#ifdef MOZ_WIDGET_COCOA
+  NS_ENSURE_ARG_POINTER(aNativeInterface);
+
+  // We don't cache or store this instance anywhere so each get returns a
+  // different instance. So `acc.nativeInterface != acc.nativeInterface`. This
+  // just seems simpler and more robust for now.
+  nsCOMPtr<nsISupports> macIface = static_cast<nsIAccessibleMacInterface*>(
+      new xpcAccessibleMacInterface(IntlGeneric()));
+  macIface.swap(*aNativeInterface);
+
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_IMPLEMENTED;
+#endif
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetBounds(int32_t* aX, int32_t* aY, int32_t* aWidth,
+                         int32_t* aHeight) {
+  NS_ENSURE_ARG_POINTER(aX);
+  *aX = 0;
+  NS_ENSURE_ARG_POINTER(aY);
+  *aY = 0;
+  NS_ENSURE_ARG_POINTER(aWidth);
+  *aWidth = 0;
+  NS_ENSURE_ARG_POINTER(aHeight);
+  *aHeight = 0;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsIntRect rect;
+  if (Accessible* acc = IntlGeneric().AsAccessible()) {
+    rect = acc->Bounds();
+  } else {
+    rect = IntlGeneric().AsProxy()->Bounds();
+  }
+
+  rect.GetRect(aX, aY, aWidth, aHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetBoundsInCSSPixels(int32_t* aX, int32_t* aY, int32_t* aWidth,
+                                    int32_t* aHeight) {
+  NS_ENSURE_ARG_POINTER(aX);
+  *aX = 0;
+  NS_ENSURE_ARG_POINTER(aY);
+  *aY = 0;
+  NS_ENSURE_ARG_POINTER(aWidth);
+  *aWidth = 0;
+  NS_ENSURE_ARG_POINTER(aHeight);
+  *aHeight = 0;
+
+  if (IntlGeneric().IsNull()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsIntRect rect;
+  if (Accessible* acc = IntlGeneric().AsAccessible()) {
+    rect = acc->BoundsInCSSPixels();
+  } else {
+    rect = IntlGeneric().AsProxy()->BoundsInCSSPixels();
+  }
+
+  rect.GetRect(aX, aY, aWidth, aHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GroupPosition(int32_t* aGroupLevel,
+                             int32_t* aSimilarItemsInGroup,
+                             int32_t* aPositionInGroup) {
+  NS_ENSURE_ARG_POINTER(aGroupLevel);
+  *aGroupLevel = 0;
+
+  NS_ENSURE_ARG_POINTER(aSimilarItemsInGroup);
+  *aSimilarItemsInGroup = 0;
+
+  NS_ENSURE_ARG_POINTER(aPositionInGroup);
+  *aPositionInGroup = 0;
+
+  GroupPos groupPos;
+  if (Accessible* acc = IntlGeneric().AsAccessible()) {
+    groupPos = acc->GroupPosition();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    groupPos = IntlGeneric().AsProxy()->GroupPosition();
+#endif
+  }
+
+  *aGroupLevel = groupPos.level;
+  *aSimilarItemsInGroup = groupPos.setSize;
+  *aPositionInGroup = groupPos.posInSet;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetRelationByType(uint32_t aType,
+                                 nsIAccessibleRelation** aRelation) {
+  NS_ENSURE_ARG_POINTER(aRelation);
+  *aRelation = nullptr;
+
+  NS_ENSURE_ARG(aType <= static_cast<uint32_t>(RelationType::LAST));
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (IntlGeneric().IsAccessible()) {
+    Relation rel = Intl()->RelationByType(static_cast<RelationType>(aType));
+    NS_ADDREF(*aRelation = new nsAccessibleRelation(aType, &rel));
+    return NS_OK;
+  }
+
+  ProxyAccessible* proxy = IntlGeneric().AsProxy();
+  nsTArray<ProxyAccessible*> targets =
+      proxy->RelationByType(static_cast<RelationType>(aType));
+  NS_ADDREF(*aRelation = new nsAccessibleRelation(aType, &targets));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetRelations(nsIArray** aRelations) {
+  NS_ENSURE_ARG_POINTER(aRelations);
+  *aRelations = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIMutableArray> relations = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  NS_ENSURE_TRUE(relations, NS_ERROR_OUT_OF_MEMORY);
+
+  static const uint32_t relationTypes[] = {
+      nsIAccessibleRelation::RELATION_LABELLED_BY,
+      nsIAccessibleRelation::RELATION_LABEL_FOR,
+      nsIAccessibleRelation::RELATION_DESCRIBED_BY,
+      nsIAccessibleRelation::RELATION_DESCRIPTION_FOR,
+      nsIAccessibleRelation::RELATION_NODE_CHILD_OF,
+      nsIAccessibleRelation::RELATION_NODE_PARENT_OF,
+      nsIAccessibleRelation::RELATION_CONTROLLED_BY,
+      nsIAccessibleRelation::RELATION_CONTROLLER_FOR,
+      nsIAccessibleRelation::RELATION_FLOWS_TO,
+      nsIAccessibleRelation::RELATION_FLOWS_FROM,
+      nsIAccessibleRelation::RELATION_MEMBER_OF,
+      nsIAccessibleRelation::RELATION_SUBWINDOW_OF,
+      nsIAccessibleRelation::RELATION_EMBEDS,
+      nsIAccessibleRelation::RELATION_EMBEDDED_BY,
+      nsIAccessibleRelation::RELATION_POPUP_FOR,
+      nsIAccessibleRelation::RELATION_PARENT_WINDOW_OF,
+      nsIAccessibleRelation::RELATION_DEFAULT_BUTTON,
+      nsIAccessibleRelation::RELATION_CONTAINING_DOCUMENT,
+      nsIAccessibleRelation::RELATION_CONTAINING_TAB_PANE,
+      nsIAccessibleRelation::RELATION_CONTAINING_APPLICATION};
+
+  for (uint32_t idx = 0; idx < ArrayLength(relationTypes); idx++) {
+    nsCOMPtr<nsIAccessibleRelation> relation;
+    nsresult rv =
+        GetRelationByType(relationTypes[idx], getter_AddRefs(relation));
+
+    if (NS_SUCCEEDED(rv) && relation) {
+      uint32_t targets = 0;
+      relation->GetTargetsCount(&targets);
+      if (targets) relations->AppendElement(relation);
+    }
+  }
+
+  NS_ADDREF(*aRelations = relations);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetFocusedChild(nsIAccessible** aChild) {
+  NS_ENSURE_ARG_POINTER(aChild);
+  *aChild = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    NS_IF_ADDREF(*aChild = ToXPC(proxy->FocusedChild()));
+#endif
+  } else {
+    NS_IF_ADDREF(*aChild = ToXPC(Intl()->FocusedChild()));
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetChildAtPoint(int32_t aX, int32_t aY,
+                               nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aAccessible = ToXPC(IntlGeneric().ChildAtPoint(
+                   aX, aY, Accessible::eDirectChild)));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetDeepestChildAtPoint(int32_t aX, int32_t aY,
+                                      nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aAccessible = ToXPC(IntlGeneric().ChildAtPoint(
+                   aX, aY, Accessible::eDeepestChild)));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetDeepestChildAtPointInProcess(int32_t aX, int32_t aY,
+                                               nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+
+  AccessibleOrProxy generic = IntlGeneric();
+  if (generic.IsNull() || generic.IsProxy()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  NS_IF_ADDREF(*aAccessible = ToXPC(
+                   Intl()->ChildAtPoint(aX, aY, Accessible::eDeepestChild)));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::SetSelected(bool aSelect) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->SetSelected(aSelect);
+#endif
+  } else {
+    Intl()->SetSelected(aSelect);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::TakeSelection() {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->TakeSelection();
+#endif
+  } else {
+    Intl()->TakeSelection();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::TakeFocus() {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+    proxy->TakeFocus();
+  } else {
+    Intl()->TakeFocus();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetActionCount(uint8_t* aActionCount) {
+  NS_ENSURE_ARG_POINTER(aActionCount);
+  *aActionCount = 0;
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aActionCount = proxy->ActionCount();
+#endif
+  } else {
+    *aActionCount = Intl()->ActionCount();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetActionName(uint8_t aIndex, nsAString& aName) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString name;
+    proxy->ActionNameAt(aIndex, name);
+    aName.Assign(name);
+#endif
+  } else {
+    if (aIndex >= Intl()->ActionCount()) return NS_ERROR_INVALID_ARG;
+
+    Intl()->ActionNameAt(aIndex, aName);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::GetActionDescription(uint8_t aIndex, nsAString& aDescription) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString description;
+    proxy->ActionDescriptionAt(aIndex, description);
+    aDescription.Assign(description);
+#endif
+  } else {
+    if (aIndex >= Intl()->ActionCount()) return NS_ERROR_INVALID_ARG;
+
+    Intl()->ActionDescriptionAt(aIndex, aDescription);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::DoAction(uint8_t aIndex) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    return proxy->DoAction(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+#endif
+  } else {
+    return Intl()->DoAction(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+  }
+}
+
+NS_IMETHODIMP
+xpcAccessible::ScrollTo(uint32_t aHow) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->ScrollTo(aHow);
+#endif
+  } else {
+    RefPtr<Accessible> intl = Intl();
+    intl->ScrollTo(aHow);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::ScrollToPoint(uint32_t aCoordinateType, int32_t aX, int32_t aY) {
+  if (IntlGeneric().IsNull()) return NS_ERROR_FAILURE;
+
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    proxy->ScrollToPoint(aCoordinateType, aX, aY);
+#endif
+  } else {
+    Intl()->ScrollToPoint(aCoordinateType, aX, aY);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessible::Announce(const nsAString& aAnnouncement, uint16_t aPriority) {
+  if (ProxyAccessible* proxy = IntlGeneric().AsProxy()) {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString announcement(aAnnouncement);
+    proxy->Announce(announcement, aPriority);
+#endif
+  } else {
+    Intl()->Announce(aAnnouncement, aPriority);
+  }
+
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessible.h b/accessible/xpcom/xpcAccessible.h
new file mode 100644
index 0000000000..6f1c964fc4
--- /dev/null
+++ b/accessible/xpcom/xpcAccessible.h
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessible_h_
+#define mozilla_a11y_xpcAccessible_h_
+
+#include "nsIAccessible.h"
+
+class nsIAccessible;
+
+namespace mozilla {
+namespace a11y {
+
+class Accessible;
+class AccessibleOrProxy;
+
+/**
+ * XPCOM nsIAccessible interface implementation, used by xpcAccessibleGeneric
+ * class.
+ */
+class xpcAccessible : public nsIAccessible {
+ public:
+  // nsIAccessible
+  NS_IMETHOD GetParent(nsIAccessible** aParent) final;
+  NS_IMETHOD GetNextSibling(nsIAccessible** aNextSibling) final;
+  NS_IMETHOD GetPreviousSibling(nsIAccessible** aPreviousSibling) final;
+  NS_IMETHOD GetFirstChild(nsIAccessible** aFirstChild) final;
+  NS_IMETHOD GetLastChild(nsIAccessible** aLastChild) final;
+  NS_IMETHOD GetChildCount(int32_t* aChildCount) final;
+  NS_IMETHOD GetChildAt(int32_t aChildIndex, nsIAccessible** aChild) final;
+  NS_IMETHOD GetChildren(nsIArray** aChildren) final;
+  NS_IMETHOD GetIndexInParent(int32_t* aIndexInParent) final;
+
+  NS_IMETHOD GetUniqueID(int64_t* aUniqueID) final;
+  NS_IMETHOD GetDOMNode(nsINode** aDOMNode) final;
+  NS_IMETHOD GetId(nsAString& aID) final;
+  NS_IMETHOD GetDocument(nsIAccessibleDocument** aDocument) final;
+  NS_IMETHOD GetRootDocument(nsIAccessibleDocument** aRootDocument) final;
+
+  NS_IMETHOD GetRole(uint32_t* aRole) final;
+  NS_IMETHOD GetState(uint32_t* aState, uint32_t* aExtraState) final;
+
+  NS_IMETHOD GetDescription(nsAString& aDescription) final;
+  NS_IMETHOD GetName(nsAString& aName) final;
+  NS_IMETHOD GetLanguage(nsAString& aLanguage) final;
+  NS_IMETHOD GetValue(nsAString& aValue) final;
+  NS_IMETHOD GetHelp(nsAString& aHelp) final;
+
+  NS_IMETHOD GetAccessKey(nsAString& aAccessKey) final;
+  NS_IMETHOD GetKeyboardShortcut(nsAString& aKeyBinding) final;
+
+  NS_IMETHOD GetAttributes(nsIPersistentProperties** aAttributes) final;
+
+  NS_IMETHOD GetNativeInterface(nsISupports** aNativeInterface) final;
+
+  NS_IMETHOD GetBounds(int32_t* aX, int32_t* aY, int32_t* aWidth,
+                       int32_t* aHeight) final;
+  NS_IMETHOD GetBoundsInCSSPixels(int32_t* aX, int32_t* aY, int32_t* aWidth,
+                                  int32_t* aHeight) final;
+  NS_IMETHOD GroupPosition(int32_t* aGroupLevel, int32_t* aSimilarItemsInGroup,
+                           int32_t* aPositionInGroup) final;
+  NS_IMETHOD GetRelationByType(uint32_t aType,
+                               nsIAccessibleRelation** aRelation) final;
+  NS_IMETHOD GetRelations(nsIArray** aRelations) final;
+
+  NS_IMETHOD GetFocusedChild(nsIAccessible** aChild) final;
+  NS_IMETHOD GetChildAtPoint(int32_t aX, int32_t aY,
+                             nsIAccessible** aAccessible) final;
+  NS_IMETHOD GetDeepestChildAtPoint(int32_t aX, int32_t aY,
+                                    nsIAccessible** aAccessible) final;
+  NS_IMETHOD GetDeepestChildAtPointInProcess(int32_t aX, int32_t aY,
+                                             nsIAccessible** aAccessible) final;
+
+  NS_IMETHOD SetSelected(bool aSelect) final;
+  NS_IMETHOD TakeSelection() final;
+  NS_IMETHOD TakeFocus() final;
+
+  NS_IMETHOD GetActionCount(uint8_t* aActionCount) final;
+  NS_IMETHOD GetActionName(uint8_t aIndex, nsAString& aName) final;
+  NS_IMETHOD GetActionDescription(uint8_t aIndex,
+                                  nsAString& aDescription) final;
+  NS_IMETHOD DoAction(uint8_t aIndex) final;
+
+  MOZ_CAN_RUN_SCRIPT
+  NS_IMETHOD ScrollTo(uint32_t aHow) final;
+  NS_IMETHOD ScrollToPoint(uint32_t aCoordinateType, int32_t aX,
+                           int32_t aY) final;
+
+  NS_IMETHOD Announce(const nsAString& aAnnouncement, uint16_t aPriority) final;
+
+ protected:
+  xpcAccessible() {}
+  virtual ~xpcAccessible() {}
+
+ private:
+  Accessible* Intl();
+  AccessibleOrProxy IntlGeneric();
+
+  xpcAccessible(const xpcAccessible&) = delete;
+  xpcAccessible& operator=(const xpcAccessible&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleApplication.cpp b/accessible/xpcom/xpcAccessibleApplication.cpp
new file mode 100644
index 0000000000..133c255778
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleApplication.cpp
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleApplication.h"
+
+#include "ApplicationAccessible.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleApplication, xpcAccessibleGeneric,
+                            nsIAccessibleApplication)
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleApplication
+
+NS_IMETHODIMP
+xpcAccessibleApplication::GetAppName(nsAString& aName) {
+  aName.Truncate();
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->AppName(aName);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleApplication::GetAppVersion(nsAString& aVersion) {
+  aVersion.Truncate();
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->AppVersion(aVersion);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleApplication::GetPlatformName(nsAString& aName) {
+  aName.Truncate();
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->PlatformName(aName);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleApplication::GetPlatformVersion(nsAString& aVersion) {
+  aVersion.Truncate();
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->PlatformVersion(aVersion);
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleApplication.h b/accessible/xpcom/xpcAccessibleApplication.h
new file mode 100644
index 0000000000..d196004131
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleApplication.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleApplication_h_
+#define mozilla_a11y_xpcAccessibleApplication_h_
+
+#include "nsIAccessibleApplication.h"
+#include "ApplicationAccessible.h"
+#include "xpcAccessibleGeneric.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XPCOM wrapper around ApplicationAccessible class.
+ */
+class xpcAccessibleApplication : public xpcAccessibleGeneric,
+                                 public nsIAccessibleApplication {
+ public:
+  explicit xpcAccessibleApplication(Accessible* aIntl)
+      : xpcAccessibleGeneric(aIntl) {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIAccessibleApplication
+  NS_IMETHOD GetAppName(nsAString& aName) final;
+  NS_IMETHOD GetAppVersion(nsAString& aVersion) final;
+  NS_IMETHOD GetPlatformName(nsAString& aName) final;
+  NS_IMETHOD GetPlatformVersion(nsAString& aVersion) final;
+
+ protected:
+  virtual ~xpcAccessibleApplication() { Shutdown(); }
+
+ private:
+  ApplicationAccessible* Intl() {
+    return mIntl.AsAccessible()->AsApplication();
+  }
+
+  xpcAccessibleApplication(const xpcAccessibleApplication&) = delete;
+  xpcAccessibleApplication& operator=(const xpcAccessibleApplication&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleDocument.cpp b/accessible/xpcom/xpcAccessibleDocument.cpp
new file mode 100644
index 0000000000..e3dbe73f22
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleDocument.cpp
@@ -0,0 +1,234 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleDocument.h"
+#include "xpcAccessibleImage.h"
+#include "xpcAccessibleTable.h"
+#include "xpcAccessibleTableCell.h"
+
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "DocAccessible-inl.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_QUERY_INTERFACE_INHERITED(xpcAccessibleDocument, xpcAccessibleHyperText,
+                                  nsIAccessibleDocument)
+NS_IMPL_ADDREF_INHERITED(xpcAccessibleDocument, xpcAccessibleHyperText)
+NS_IMETHODIMP_(MozExternalRefCountType) xpcAccessibleDocument::Release(void) {
+  nsrefcnt r = xpcAccessibleHyperText::Release();
+  NS_LOG_RELEASE(this, r, "xpcAccessibleDocument");
+
+  // The only reference to the xpcAccessibleDocument is in DocManager's cache.
+  if (r == 1 && !mIntl.IsNull() && mCache.Count() == 0) {
+    if (mIntl.IsAccessible()) {
+      GetAccService()->RemoveFromXPCDocumentCache(
+          mIntl.AsAccessible()->AsDoc());
+    } else {
+      GetAccService()->RemoveFromRemoteXPCDocumentCache(
+          mIntl.AsProxy()->AsDoc());
+    }
+  }
+  return r;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleDocument
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetURL(nsAString& aURL) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->URL(aURL);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetTitle(nsAString& aTitle) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsAutoString title;
+  Intl()->Title(title);
+  aTitle = title;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetMimeType(nsAString& aType) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->MimeType(aType);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetDocType(nsAString& aType) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->DocType(aType);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetDOMDocument(dom::Document** aDOMDocument) {
+  NS_ENSURE_ARG_POINTER(aDOMDocument);
+  *aDOMDocument = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (Intl()->DocumentNode()) NS_ADDREF(*aDOMDocument = Intl()->DocumentNode());
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetWindow(mozIDOMWindowProxy** aDOMWindow) {
+  NS_ENSURE_ARG_POINTER(aDOMWindow);
+  *aDOMWindow = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aDOMWindow = Intl()->DocumentNode()->GetWindow());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetParentDocument(nsIAccessibleDocument** aDocument) {
+  NS_ENSURE_ARG_POINTER(aDocument);
+  *aDocument = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aDocument = ToXPCDocument(Intl()->ParentDocument()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetChildDocumentCount(uint32_t* aCount) {
+  NS_ENSURE_ARG_POINTER(aCount);
+  *aCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aCount = Intl()->ChildDocumentCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetChildDocumentAt(uint32_t aIndex,
+                                          nsIAccessibleDocument** aDocument) {
+  NS_ENSURE_ARG_POINTER(aDocument);
+  *aDocument = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aDocument = ToXPCDocument(Intl()->GetChildDocumentAt(aIndex)));
+  return *aDocument ? NS_OK : NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleDocument::GetVirtualCursor(nsIAccessiblePivot** aVirtualCursor) {
+  NS_ENSURE_ARG_POINTER(aVirtualCursor);
+  *aVirtualCursor = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_ADDREF(*aVirtualCursor = Intl()->VirtualCursor());
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// xpcAccessibleDocument
+
+xpcAccessibleGeneric* xpcAccessibleDocument::GetAccessible(
+    Accessible* aAccessible) {
+  MOZ_ASSERT(!mRemote);
+  if (ToXPCDocument(aAccessible->Document()) != this) {
+    NS_ERROR(
+        "This XPCOM document is not related with given internal accessible!");
+    return nullptr;
+  }
+
+  if (aAccessible->IsDoc()) return this;
+
+  xpcAccessibleGeneric* xpcAcc = mCache.Get(aAccessible);
+  if (xpcAcc) return xpcAcc;
+
+  if (aAccessible->IsImage())
+    xpcAcc = new xpcAccessibleImage(aAccessible);
+  else if (aAccessible->IsTable())
+    xpcAcc = new xpcAccessibleTable(aAccessible);
+  else if (aAccessible->IsTableCell())
+    xpcAcc = new xpcAccessibleTableCell(aAccessible);
+  else if (aAccessible->IsHyperText())
+    xpcAcc = new xpcAccessibleHyperText(aAccessible);
+  else
+    xpcAcc = new xpcAccessibleGeneric(aAccessible);
+
+  mCache.Put(aAccessible, xpcAcc);
+  return xpcAcc;
+}
+
+xpcAccessibleGeneric* xpcAccessibleDocument::GetXPCAccessible(
+    ProxyAccessible* aProxy) {
+  MOZ_ASSERT(mRemote);
+  MOZ_ASSERT(aProxy->Document() == mIntl.AsProxy());
+  if (aProxy->IsDoc()) {
+    return this;
+  }
+
+  xpcAccessibleGeneric* acc = mCache.Get(aProxy);
+  if (acc) {
+    return acc;
+  }
+
+  // XXX support exposing optional interfaces.
+  uint8_t interfaces = 0;
+  if (aProxy->mHasValue) {
+    interfaces |= eValue;
+  }
+
+  if (aProxy->mIsHyperLink) {
+    interfaces |= eHyperLink;
+  }
+
+  if (aProxy->mIsHyperText) {
+    interfaces |= eText;
+    acc = new xpcAccessibleHyperText(aProxy, interfaces);
+    mCache.Put(aProxy, acc);
+
+    return acc;
+  }
+
+  acc = new xpcAccessibleGeneric(aProxy, interfaces);
+  mCache.Put(aProxy, acc);
+
+  return acc;
+}
+
+void xpcAccessibleDocument::Shutdown() {
+  for (auto iter = mCache.Iter(); !iter.Done(); iter.Next()) {
+    iter.Data()->Shutdown();
+    iter.Remove();
+  }
+  xpcAccessibleGeneric::Shutdown();
+}
+
+xpcAccessibleGeneric* a11y::ToXPC(AccessibleOrProxy aAcc) {
+  if (aAcc.IsNull()) {
+    return nullptr;
+  }
+
+  if (aAcc.IsAccessible()) {
+    return ToXPC(aAcc.AsAccessible());
+  }
+
+  xpcAccessibleDocument* doc = ToXPCDocument(aAcc.AsProxy()->Document());
+  return doc->GetXPCAccessible(aAcc.AsProxy());
+}
diff --git a/accessible/xpcom/xpcAccessibleDocument.h b/accessible/xpcom/xpcAccessibleDocument.h
new file mode 100644
index 0000000000..f042cc1081
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleDocument.h
@@ -0,0 +1,144 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleDocument_h_
+#define mozilla_a11y_xpcAccessibleDocument_h_
+
+#include "nsIAccessibleDocument.h"
+
+#include "DocAccessible.h"
+#include "nsAccessibilityService.h"
+#include "xpcAccessibleApplication.h"
+#include "xpcAccessibleHyperText.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XPCOM wrapper around DocAccessible class.
+ */
+class xpcAccessibleDocument : public xpcAccessibleHyperText,
+                              public nsIAccessibleDocument {
+ public:
+  explicit xpcAccessibleDocument(DocAccessible* aIntl)
+      : xpcAccessibleHyperText(aIntl),
+        mCache(kDefaultCacheLength),
+        mRemote(false) {}
+
+  xpcAccessibleDocument(ProxyAccessible* aProxy, uint32_t aInterfaces)
+      : xpcAccessibleHyperText(aProxy, aInterfaces),
+        mCache(kDefaultCacheLength),
+        mRemote(true) {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIAccessibleDocument
+  NS_IMETHOD GetURL(nsAString& aURL) final;
+  NS_IMETHOD GetTitle(nsAString& aTitle) final;
+  NS_IMETHOD GetMimeType(nsAString& aType) final;
+  NS_IMETHOD GetDocType(nsAString& aType) final;
+  NS_IMETHOD GetDOMDocument(dom::Document** aDOMDocument) final;
+  NS_IMETHOD GetWindow(mozIDOMWindowProxy** aDOMWindow) final;
+  NS_IMETHOD GetParentDocument(nsIAccessibleDocument** aDocument) final;
+  NS_IMETHOD GetChildDocumentCount(uint32_t* aCount) final;
+  NS_IMETHOD GetChildDocumentAt(uint32_t aIndex,
+                                nsIAccessibleDocument** aDocument) final;
+  NS_IMETHOD GetVirtualCursor(nsIAccessiblePivot** aVirtualCursor) final;
+
+  /**
+   * Return XPCOM wrapper for the internal accessible.
+   */
+  xpcAccessibleGeneric* GetAccessible(Accessible* aAccessible);
+  xpcAccessibleGeneric* GetXPCAccessible(ProxyAccessible* aProxy);
+
+  virtual void Shutdown() override;
+
+ protected:
+  virtual ~xpcAccessibleDocument() {}
+
+ private:
+  DocAccessible* Intl() {
+    if (Accessible* acc = mIntl.AsAccessible()) {
+      return acc->AsDoc();
+    }
+
+    return nullptr;
+  }
+
+  void NotifyOfShutdown(Accessible* aAccessible) {
+    MOZ_ASSERT(!mRemote);
+    xpcAccessibleGeneric* xpcAcc = mCache.Get(aAccessible);
+    if (xpcAcc) {
+      xpcAcc->Shutdown();
+    }
+
+    mCache.Remove(aAccessible);
+    if (mCache.Count() == 0 && mRefCnt == 1) {
+      GetAccService()->RemoveFromXPCDocumentCache(
+          mIntl.AsAccessible()->AsDoc());
+    }
+  }
+
+  void NotifyOfShutdown(ProxyAccessible* aProxy) {
+    MOZ_ASSERT(mRemote);
+    xpcAccessibleGeneric* xpcAcc = mCache.Get(aProxy);
+    if (xpcAcc) {
+      xpcAcc->Shutdown();
+    }
+
+    mCache.Remove(aProxy);
+    if (mCache.Count() == 0 && mRefCnt == 1) {
+      GetAccService()->RemoveFromRemoteXPCDocumentCache(
+          mIntl.AsProxy()->AsDoc());
+    }
+  }
+
+  friend class DocManager;
+  friend class DocAccessible;
+  friend class ProxyAccessible;
+  friend class ProxyAccessibleBase<ProxyAccessible>;
+  friend class xpcAccessibleGeneric;
+
+  xpcAccessibleDocument(const xpcAccessibleDocument&) = delete;
+  xpcAccessibleDocument& operator=(const xpcAccessibleDocument&) = delete;
+
+  nsDataHashtable<nsPtrHashKey<const void>, xpcAccessibleGeneric*> mCache;
+  bool mRemote;
+};
+
+inline xpcAccessibleGeneric* ToXPC(Accessible* aAccessible) {
+  if (!aAccessible) return nullptr;
+
+  if (aAccessible->IsApplication()) return XPCApplicationAcc();
+
+  xpcAccessibleDocument* xpcDoc =
+      GetAccService()->GetXPCDocument(aAccessible->Document());
+  return xpcDoc ? xpcDoc->GetAccessible(aAccessible) : nullptr;
+}
+
+xpcAccessibleGeneric* ToXPC(AccessibleOrProxy aAcc);
+
+inline xpcAccessibleHyperText* ToXPCText(HyperTextAccessible* aAccessible) {
+  if (!aAccessible) return nullptr;
+
+  xpcAccessibleDocument* xpcDoc =
+      GetAccService()->GetXPCDocument(aAccessible->Document());
+  return static_cast<xpcAccessibleHyperText*>(
+      xpcDoc->GetAccessible(aAccessible));
+}
+
+inline xpcAccessibleDocument* ToXPCDocument(DocAccessible* aAccessible) {
+  return GetAccService()->GetXPCDocument(aAccessible);
+}
+
+inline xpcAccessibleDocument* ToXPCDocument(DocAccessibleParent* aAccessible) {
+  return GetAccService()->GetXPCDocument(aAccessible);
+}
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleGeneric.cpp b/accessible/xpcom/xpcAccessibleGeneric.cpp
new file mode 100644
index 0000000000..b615616353
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleGeneric.cpp
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleGeneric.h"
+
+#include "xpcAccessibleDocument.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_INTERFACE_MAP_BEGIN(xpcAccessibleGeneric)
+  NS_INTERFACE_MAP_ENTRY(nsIAccessible)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleSelectable,
+                                     mSupportedIfaces & eSelectable)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleValue,
+                                     mSupportedIfaces & eValue)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleHyperLink,
+                                     mSupportedIfaces & eHyperLink)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIAccessible)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(xpcAccessibleGeneric)
+NS_IMPL_RELEASE(xpcAccessibleGeneric)
+
+xpcAccessibleGeneric::~xpcAccessibleGeneric() {
+  if (mIntl.IsNull()) {
+    return;
+  }
+
+  xpcAccessibleDocument* xpcDoc = nullptr;
+  if (mIntl.IsAccessible()) {
+    Accessible* acc = mIntl.AsAccessible();
+    if (!acc->IsDoc() && !acc->IsApplication()) {
+      xpcDoc = GetAccService()->GetXPCDocument(acc->Document());
+      xpcDoc->NotifyOfShutdown(acc);
+    }
+  } else {
+    ProxyAccessible* proxy = mIntl.AsProxy();
+    if (!proxy->IsDoc()) {
+      xpcDoc = GetAccService()->GetXPCDocument(proxy->Document());
+      xpcDoc->NotifyOfShutdown(proxy);
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessible
+
+Accessible* xpcAccessibleGeneric::ToInternalAccessible() const {
+  return mIntl.AsAccessible();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// xpcAccessibleGeneric
+
+void xpcAccessibleGeneric::Shutdown() { mIntl = nullptr; }
diff --git a/accessible/xpcom/xpcAccessibleGeneric.h b/accessible/xpcom/xpcAccessibleGeneric.h
new file mode 100644
index 0000000000..499bdc8447
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleGeneric.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleGeneric_h_
+#define mozilla_a11y_xpcAccessibleGeneric_h_
+
+#include "xpcAccessible.h"
+#include "xpcAccessibleHyperLink.h"
+#include "xpcAccessibleSelectable.h"
+#include "xpcAccessibleValue.h"
+
+#include "Accessible.h"
+#include "AccessibleOrProxy.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XPCOM wrapper around Accessible class.
+ */
+class xpcAccessibleGeneric : public xpcAccessible,
+                             public xpcAccessibleHyperLink,
+                             public xpcAccessibleSelectable,
+                             public xpcAccessibleValue {
+ public:
+  explicit xpcAccessibleGeneric(Accessible* aInternal)
+      : mIntl(aInternal), mSupportedIfaces(0) {
+    if (aInternal->IsSelect()) mSupportedIfaces |= eSelectable;
+    if (aInternal->HasNumericValue()) mSupportedIfaces |= eValue;
+    if (aInternal->IsLink()) mSupportedIfaces |= eHyperLink;
+  }
+
+  xpcAccessibleGeneric(ProxyAccessible* aProxy, uint8_t aInterfaces)
+      : mIntl(aProxy), mSupportedIfaces(aInterfaces) {}
+
+  NS_DECL_ISUPPORTS
+
+  // nsIAccessible
+  Accessible* ToInternalAccessible() const final;
+
+  // xpcAccessibleGeneric
+  virtual void Shutdown();
+
+ protected:
+  virtual ~xpcAccessibleGeneric();
+
+  AccessibleOrProxy mIntl;
+
+  enum {
+    eSelectable = 1 << 0,
+    eValue = 1 << 1,
+    eHyperLink = 1 << 2,
+    eText = 1 << 3
+  };
+  uint8_t mSupportedIfaces;
+
+ private:
+  friend class Accessible;
+  friend class xpcAccessible;
+  friend class xpcAccessibleHyperLink;
+  friend class xpcAccessibleSelectable;
+  friend class xpcAccessibleValue;
+
+  xpcAccessibleGeneric(const xpcAccessibleGeneric&) = delete;
+  xpcAccessibleGeneric& operator=(const xpcAccessibleGeneric&) = delete;
+};
+
+inline Accessible* xpcAccessible::Intl() {
+  return static_cast<xpcAccessibleGeneric*>(this)->mIntl.AsAccessible();
+}
+
+inline AccessibleOrProxy xpcAccessible::IntlGeneric() {
+  return static_cast<xpcAccessibleGeneric*>(this)->mIntl;
+}
+
+inline AccessibleOrProxy xpcAccessibleHyperLink::Intl() {
+  return static_cast<xpcAccessibleGeneric*>(this)->mIntl;
+}
+
+inline Accessible* xpcAccessibleSelectable::Intl() {
+  return static_cast<xpcAccessibleGeneric*>(this)->mIntl.AsAccessible();
+}
+
+inline AccessibleOrProxy xpcAccessibleValue::Intl() {
+  return static_cast<xpcAccessibleGeneric*>(this)->mIntl;
+}
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleHyperLink.cpp b/accessible/xpcom/xpcAccessibleHyperLink.cpp
new file mode 100644
index 0000000000..b3c9ff7e66
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleHyperLink.cpp
@@ -0,0 +1,163 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleHyperLink.h"
+
+#include "Accessible-inl.h"
+#include "nsNetUtil.h"
+#include "xpcAccessibleDocument.h"
+
+using namespace mozilla::a11y;
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetStartIndex(int32_t* aStartIndex) {
+  NS_ENSURE_ARG_POINTER(aStartIndex);
+  *aStartIndex = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible()) {
+    *aStartIndex = Intl().AsAccessible()->StartOffset();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    bool isIndexValid = false;
+    uint32_t startOffset = Intl().AsProxy()->StartOffset(&isIndexValid);
+    if (!isIndexValid) return NS_ERROR_FAILURE;
+
+    *aStartIndex = startOffset;
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetEndIndex(int32_t* aEndIndex) {
+  NS_ENSURE_ARG_POINTER(aEndIndex);
+  *aEndIndex = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible()) {
+    *aEndIndex = Intl().AsAccessible()->EndOffset();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    bool isIndexValid = false;
+    uint32_t endOffset = Intl().AsProxy()->EndOffset(&isIndexValid);
+    if (!isIndexValid) return NS_ERROR_FAILURE;
+
+    *aEndIndex = endOffset;
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetAnchorCount(int32_t* aAnchorCount) {
+  NS_ENSURE_ARG_POINTER(aAnchorCount);
+  *aAnchorCount = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible()) {
+    *aAnchorCount = Intl().AsAccessible()->AnchorCount();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    bool isCountValid = false;
+    uint32_t anchorCount = Intl().AsProxy()->AnchorCount(&isCountValid);
+    if (!isCountValid) return NS_ERROR_FAILURE;
+
+    *aAnchorCount = anchorCount;
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetURI(int32_t aIndex, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (aIndex < 0) return NS_ERROR_INVALID_ARG;
+
+  if (Intl().IsAccessible()) {
+    if (aIndex >= static_cast<int32_t>(Intl().AsAccessible()->AnchorCount()))
+      return NS_ERROR_INVALID_ARG;
+
+    RefPtr<nsIURI>(Intl().AsAccessible()->AnchorURIAt(aIndex)).forget(aURI);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsCString spec;
+    bool isURIValid = false;
+    Intl().AsProxy()->AnchorURIAt(aIndex, spec, &isURIValid);
+    if (!isURIValid) return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsIURI> uri;
+    nsresult rv = NS_NewURI(getter_AddRefs(uri), spec);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    uri.forget(aURI);
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetAnchor(int32_t aIndex, nsIAccessible** aAccessible) {
+  NS_ENSURE_ARG_POINTER(aAccessible);
+  *aAccessible = nullptr;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (aIndex < 0) return NS_ERROR_INVALID_ARG;
+
+  if (Intl().IsAccessible()) {
+    if (aIndex >= static_cast<int32_t>(Intl().AsAccessible()->AnchorCount()))
+      return NS_ERROR_INVALID_ARG;
+
+    NS_IF_ADDREF(*aAccessible = ToXPC(Intl().AsAccessible()->AnchorAt(aIndex)));
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    NS_IF_ADDREF(*aAccessible = ToXPC(Intl().AsProxy()->AnchorAt(aIndex)));
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperLink::GetValid(bool* aValid) {
+  NS_ENSURE_ARG_POINTER(aValid);
+  *aValid = false;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible()) {
+    *aValid = Intl().AsAccessible()->IsLinkValid();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aValid = Intl().AsProxy()->IsLinkValid();
+#endif
+  }
+
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleHyperLink.h b/accessible/xpcom/xpcAccessibleHyperLink.h
new file mode 100644
index 0000000000..27b14ab573
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleHyperLink.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleHyperLink_h_
+#define mozilla_a11y_xpcAccessibleHyperLink_h_
+
+#include "nsIAccessibleHyperLink.h"
+
+#include "AccessibleOrProxy.h"
+
+class nsIAccessible;
+
+namespace mozilla {
+namespace a11y {
+
+class Accessible;
+
+/**
+ * XPCOM nsIAccessibleHyperLink implementation, used by xpcAccessibleGeneric
+ * class.
+ */
+class xpcAccessibleHyperLink : public nsIAccessibleHyperLink {
+ public:
+  NS_IMETHOD GetAnchorCount(int32_t* aAnchorCount) final;
+  NS_IMETHOD GetStartIndex(int32_t* aStartIndex) final;
+  NS_IMETHOD GetEndIndex(int32_t* aEndIndex) final;
+  NS_IMETHOD GetURI(int32_t aIndex, nsIURI** aURI) final;
+  NS_IMETHOD GetAnchor(int32_t aIndex, nsIAccessible** aAccessible) final;
+  NS_IMETHOD GetValid(bool* aValid) final;
+
+ protected:
+  xpcAccessibleHyperLink() {}
+  virtual ~xpcAccessibleHyperLink() {}
+
+ private:
+  xpcAccessibleHyperLink(const xpcAccessibleHyperLink&) = delete;
+  xpcAccessibleHyperLink& operator=(const xpcAccessibleHyperLink&) = delete;
+
+  AccessibleOrProxy Intl();
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleHyperText.cpp b/accessible/xpcom/xpcAccessibleHyperText.cpp
new file mode 100644
index 0000000000..45ede2ae25
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleHyperText.cpp
@@ -0,0 +1,744 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleHyperText.h"
+
+#include "Accessible-inl.h"
+#include "HyperTextAccessible-inl.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "TextRange.h"
+#include "nsComponentManagerUtils.h"
+#include "xpcAccessibleDocument.h"
+#include "xpcAccessibleTextRange.h"
+
+#include "nsIPersistentProperties2.h"
+#include "nsIMutableArray.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_INTERFACE_MAP_BEGIN(xpcAccessibleHyperText)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleText,
+                                     mSupportedIfaces & eText)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleEditableText,
+                                     mSupportedIfaces & eText)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleHyperText,
+                                     mSupportedIfaces & eText)
+NS_INTERFACE_MAP_END_INHERITING(xpcAccessibleGeneric)
+
+NS_IMPL_ADDREF_INHERITED(xpcAccessibleHyperText, xpcAccessibleGeneric)
+NS_IMPL_RELEASE_INHERITED(xpcAccessibleHyperText, xpcAccessibleGeneric)
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleText
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetCharacterCount(int32_t* aCharacterCount) {
+  NS_ENSURE_ARG_POINTER(aCharacterCount);
+  *aCharacterCount = 0;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aCharacterCount = Intl()->CharacterCount();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aCharacterCount = mIntl.AsProxy()->CharacterCount();
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetText(int32_t aStartOffset, int32_t aEndOffset,
+                                nsAString& aText) {
+  aText.Truncate();
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->TextSubstring(aStartOffset, aEndOffset, aText);
+  } else {
+    nsString text;
+    mIntl.AsProxy()->TextSubstring(aStartOffset, aEndOffset, text);
+    aText = text;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetTextBeforeOffset(
+    int32_t aOffset, AccessibleTextBoundary aBoundaryType,
+    int32_t* aStartOffset, int32_t* aEndOffset, nsAString& aText) {
+  NS_ENSURE_ARG_POINTER(aStartOffset);
+  NS_ENSURE_ARG_POINTER(aEndOffset);
+  *aStartOffset = *aEndOffset = 0;
+  aText.Truncate();
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->TextBeforeOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset,
+                             aText);
+  } else {
+    nsString text;
+    mIntl.AsProxy()->GetTextBeforeOffset(aOffset, aBoundaryType, text,
+                                         aStartOffset, aEndOffset);
+    aText = text;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetTextAtOffset(int32_t aOffset,
+                                        AccessibleTextBoundary aBoundaryType,
+                                        int32_t* aStartOffset,
+                                        int32_t* aEndOffset, nsAString& aText) {
+  NS_ENSURE_ARG_POINTER(aStartOffset);
+  NS_ENSURE_ARG_POINTER(aEndOffset);
+  *aStartOffset = *aEndOffset = 0;
+  aText.Truncate();
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->TextAtOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset,
+                         aText);
+  } else {
+    nsString text;
+    mIntl.AsProxy()->GetTextAtOffset(aOffset, aBoundaryType, text, aStartOffset,
+                                     aEndOffset);
+    aText = text;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetTextAfterOffset(int32_t aOffset,
+                                           AccessibleTextBoundary aBoundaryType,
+                                           int32_t* aStartOffset,
+                                           int32_t* aEndOffset,
+                                           nsAString& aText) {
+  NS_ENSURE_ARG_POINTER(aStartOffset);
+  NS_ENSURE_ARG_POINTER(aEndOffset);
+  *aStartOffset = *aEndOffset = 0;
+  aText.Truncate();
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->TextAfterOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset,
+                            aText);
+  } else {
+    nsString text;
+    mIntl.AsProxy()->GetTextAfterOffset(aOffset, aBoundaryType, text,
+                                        aStartOffset, aEndOffset);
+    aText = text;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetCharacterAtOffset(int32_t aOffset,
+                                             char16_t* aCharacter) {
+  NS_ENSURE_ARG_POINTER(aCharacter);
+  *aCharacter = L'\0';
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aCharacter = Intl()->CharAt(aOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aCharacter = mIntl.AsProxy()->CharAt(aOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetTextAttributes(
+    bool aIncludeDefAttrs, int32_t aOffset, int32_t* aStartOffset,
+    int32_t* aEndOffset, nsIPersistentProperties** aAttributes) {
+  NS_ENSURE_ARG_POINTER(aStartOffset);
+  NS_ENSURE_ARG_POINTER(aEndOffset);
+  NS_ENSURE_ARG_POINTER(aAttributes);
+  *aStartOffset = *aEndOffset = 0;
+  *aAttributes = nullptr;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIPersistentProperties> props;
+  if (mIntl.IsAccessible()) {
+    props = Intl()->TextAttributes(aIncludeDefAttrs, aOffset, aStartOffset,
+                                   aEndOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    AutoTArray<Attribute, 10> attrs;
+    mIntl.AsProxy()->TextAttributes(aIncludeDefAttrs, aOffset, &attrs,
+                                    aStartOffset, aEndOffset);
+    uint32_t attrCount = attrs.Length();
+    nsAutoString unused;
+    for (uint32_t i = 0; i < attrCount; i++) {
+      props->SetStringProperty(attrs[i].Name(), attrs[i].Value(), unused);
+    }
+#endif
+  }
+  props.forget(aAttributes);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetDefaultTextAttributes(
+    nsIPersistentProperties** aAttributes) {
+  NS_ENSURE_ARG_POINTER(aAttributes);
+  *aAttributes = nullptr;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIPersistentProperties> props;
+  if (mIntl.IsAccessible()) {
+    props = Intl()->DefaultTextAttributes();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    AutoTArray<Attribute, 10> attrs;
+    mIntl.AsProxy()->DefaultTextAttributes(&attrs);
+    uint32_t attrCount = attrs.Length();
+    nsAutoString unused;
+    for (uint32_t i = 0; i < attrCount; i++) {
+      props->SetStringProperty(attrs[i].Name(), attrs[i].Value(), unused);
+    }
+#endif
+  }
+  props.forget(aAttributes);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetCharacterExtents(int32_t aOffset, int32_t* aX,
+                                            int32_t* aY, int32_t* aWidth,
+                                            int32_t* aHeight,
+                                            uint32_t aCoordType) {
+  NS_ENSURE_ARG_POINTER(aX);
+  NS_ENSURE_ARG_POINTER(aY);
+  NS_ENSURE_ARG_POINTER(aWidth);
+  NS_ENSURE_ARG_POINTER(aHeight);
+  *aX = *aY = *aWidth = *aHeight;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  nsIntRect rect;
+  if (mIntl.IsAccessible()) {
+    rect = Intl()->CharBounds(aOffset, aCoordType);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    rect = mIntl.AsProxy()->CharBounds(aOffset, aCoordType);
+#endif
+  }
+  rect.GetRect(aX, aY, aWidth, aHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetRangeExtents(int32_t aStartOffset,
+                                        int32_t aEndOffset, int32_t* aX,
+                                        int32_t* aY, int32_t* aWidth,
+                                        int32_t* aHeight, uint32_t aCoordType) {
+  NS_ENSURE_ARG_POINTER(aX);
+  NS_ENSURE_ARG_POINTER(aY);
+  NS_ENSURE_ARG_POINTER(aWidth);
+  NS_ENSURE_ARG_POINTER(aHeight);
+  *aX = *aY = *aWidth = *aHeight = 0;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  nsIntRect rect;
+  if (mIntl.IsAccessible()) {
+    rect = Intl()->TextBounds(aStartOffset, aEndOffset, aCoordType);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    rect = mIntl.AsProxy()->TextBounds(aStartOffset, aEndOffset, aCoordType);
+#endif
+  }
+  rect.GetRect(aX, aY, aWidth, aHeight);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetOffsetAtPoint(int32_t aX, int32_t aY,
+                                         uint32_t aCoordType,
+                                         int32_t* aOffset) {
+  NS_ENSURE_ARG_POINTER(aOffset);
+  *aOffset = -1;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aOffset = Intl()->OffsetAtPoint(aX, aY, aCoordType);
+  } else {
+    *aOffset = mIntl.AsProxy()->OffsetAtPoint(aX, aY, aCoordType);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetCaretOffset(int32_t* aCaretOffset) {
+  NS_ENSURE_ARG_POINTER(aCaretOffset);
+  *aCaretOffset = -1;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aCaretOffset = Intl()->CaretOffset();
+  } else {
+    *aCaretOffset = mIntl.AsProxy()->CaretOffset();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::SetCaretOffset(int32_t aCaretOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->SetCaretOffset(aCaretOffset);
+  } else {
+    mIntl.AsProxy()->SetCaretOffset(aCaretOffset);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetSelectionCount(int32_t* aSelectionCount) {
+  NS_ENSURE_ARG_POINTER(aSelectionCount);
+  *aSelectionCount = 0;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aSelectionCount = Intl()->SelectionCount();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aSelectionCount = mIntl.AsProxy()->SelectionCount();
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetSelectionBounds(int32_t aSelectionNum,
+                                           int32_t* aStartOffset,
+                                           int32_t* aEndOffset) {
+  NS_ENSURE_ARG_POINTER(aStartOffset);
+  NS_ENSURE_ARG_POINTER(aEndOffset);
+  *aStartOffset = *aEndOffset = 0;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (aSelectionNum < 0) return NS_ERROR_INVALID_ARG;
+
+  if (mIntl.IsAccessible()) {
+    if (aSelectionNum >= Intl()->SelectionCount()) return NS_ERROR_INVALID_ARG;
+
+    Intl()->SelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString unused;
+    mIntl.AsProxy()->SelectionBoundsAt(aSelectionNum, unused, aStartOffset,
+                                       aEndOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::SetSelectionBounds(int32_t aSelectionNum,
+                                           int32_t aStartOffset,
+                                           int32_t aEndOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (aSelectionNum < 0) return NS_ERROR_INVALID_ARG;
+
+  if (mIntl.IsAccessible()) {
+    if (!Intl()->SetSelectionBoundsAt(aSelectionNum, aStartOffset,
+                                      aEndOffset)) {
+      return NS_ERROR_INVALID_ARG;
+    }
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    if (!mIntl.AsProxy()->SetSelectionBoundsAt(aSelectionNum, aStartOffset,
+                                               aEndOffset)) {
+      return NS_ERROR_INVALID_ARG;
+    }
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::AddSelection(int32_t aStartOffset, int32_t aEndOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->AddToSelection(aStartOffset, aEndOffset);
+  } else {
+    mIntl.AsProxy()->AddToSelection(aStartOffset, aEndOffset);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::RemoveSelection(int32_t aSelectionNum) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->RemoveFromSelection(aSelectionNum);
+  } else {
+    mIntl.AsProxy()->RemoveFromSelection(aSelectionNum);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::ScrollSubstringTo(int32_t aStartOffset,
+                                          int32_t aEndOffset,
+                                          uint32_t aScrollType) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->ScrollSubstringTo(aStartOffset, aEndOffset, aScrollType);
+  } else {
+    mIntl.AsProxy()->ScrollSubstringTo(aStartOffset, aEndOffset, aScrollType);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::ScrollSubstringToPoint(int32_t aStartOffset,
+                                               int32_t aEndOffset,
+                                               uint32_t aCoordinateType,
+                                               int32_t aX, int32_t aY) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->ScrollSubstringToPoint(aStartOffset, aEndOffset, aCoordinateType,
+                                   aX, aY);
+  } else {
+    mIntl.AsProxy()->ScrollSubstringToPoint(aStartOffset, aEndOffset,
+                                            aCoordinateType, aX, aY);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetEnclosingRange(nsIAccessibleTextRange** aRange) {
+  NS_ENSURE_ARG_POINTER(aRange);
+  *aRange = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  RefPtr<xpcAccessibleTextRange> range = new xpcAccessibleTextRange;
+  Intl()->EnclosingRange(range->mRange);
+  NS_ASSERTION(range->mRange.IsValid(),
+               "Should always have an enclosing range!");
+
+  range.forget(aRange);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetSelectionRanges(nsIArray** aRanges) {
+  NS_ENSURE_ARG_POINTER(aRanges);
+  *aRanges = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> xpcRanges =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  AutoTArray<TextRange, 1> ranges;
+  Intl()->SelectionRanges(&ranges);
+  uint32_t len = ranges.Length();
+  for (uint32_t idx = 0; idx < len; idx++)
+    xpcRanges->AppendElement(
+        new xpcAccessibleTextRange(std::move(ranges[idx])));
+
+  xpcRanges.forget(aRanges);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetVisibleRanges(nsIArray** aRanges) {
+  NS_ENSURE_ARG_POINTER(aRanges);
+  *aRanges = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> xpcRanges =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsTArray<TextRange> ranges;
+  Intl()->VisibleRanges(&ranges);
+  uint32_t len = ranges.Length();
+  for (uint32_t idx = 0; idx < len; idx++)
+    xpcRanges->AppendElement(
+        new xpcAccessibleTextRange(std::move(ranges[idx])));
+
+  xpcRanges.forget(aRanges);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetRangeByChild(nsIAccessible* aChild,
+                                        nsIAccessibleTextRange** aRange) {
+  NS_ENSURE_ARG_POINTER(aRange);
+  *aRange = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Accessible* child = aChild->ToInternalAccessible();
+  if (child) {
+    RefPtr<xpcAccessibleTextRange> range = new xpcAccessibleTextRange;
+    Intl()->RangeByChild(child, range->mRange);
+    if (range->mRange.IsValid()) range.forget(aRange);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetRangeAtPoint(int32_t aX, int32_t aY,
+                                        nsIAccessibleTextRange** aRange) {
+  NS_ENSURE_ARG_POINTER(aRange);
+  *aRange = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  RefPtr<xpcAccessibleTextRange> range = new xpcAccessibleTextRange;
+  Intl()->RangeAtPoint(aX, aY, range->mRange);
+  if (range->mRange.IsValid()) range.forget(aRange);
+
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleEditableText
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::SetTextContents(const nsAString& aText) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->ReplaceText(aText);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString text(aText);
+    mIntl.AsProxy()->ReplaceText(text);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::InsertText(const nsAString& aText, int32_t aOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->InsertText(aText, aOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    nsString text(aText);
+    mIntl.AsProxy()->InsertText(text, aOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::CopyText(int32_t aStartOffset, int32_t aEndOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->CopyText(aStartOffset, aEndOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    mIntl.AsProxy()->CopyText(aStartOffset, aEndOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::CutText(int32_t aStartOffset, int32_t aEndOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->CutText(aStartOffset, aEndOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    mIntl.AsProxy()->CutText(aStartOffset, aEndOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::DeleteText(int32_t aStartOffset, int32_t aEndOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    Intl()->DeleteText(aStartOffset, aEndOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    mIntl.AsProxy()->DeleteText(aStartOffset, aEndOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::PasteText(int32_t aOffset) {
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    RefPtr<HyperTextAccessible> acc = Intl();
+    acc->PasteText(aOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    mIntl.AsProxy()->PasteText(aOffset);
+#endif
+  }
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleHyperText
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetLinkCount(int32_t* aLinkCount) {
+  NS_ENSURE_ARG_POINTER(aLinkCount);
+  *aLinkCount = 0;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aLinkCount = Intl()->LinkCount();
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aLinkCount = mIntl.AsProxy()->LinkCount();
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetLinkAt(int32_t aIndex,
+                                  nsIAccessibleHyperLink** aLink) {
+  NS_ENSURE_ARG_POINTER(aLink);
+  *aLink = nullptr;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    NS_IF_ADDREF(*aLink = ToXPC(Intl()->LinkAt(aIndex)));
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    NS_IF_ADDREF(*aLink = ToXPC(mIntl.AsProxy()->LinkAt(aIndex)));
+#endif
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetLinkIndex(nsIAccessibleHyperLink* aLink,
+                                     int32_t* aIndex) {
+  NS_ENSURE_ARG_POINTER(aLink);
+  NS_ENSURE_ARG_POINTER(aIndex);
+  *aIndex = -1;
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIAccessible> xpcLink(do_QueryInterface(aLink));
+  if (Accessible* accLink = xpcLink->ToInternalAccessible()) {
+    *aIndex = Intl()->LinkIndexOf(accLink);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    xpcAccessibleHyperText* linkHyperText =
+        static_cast<xpcAccessibleHyperText*>(xpcLink.get());
+    ProxyAccessible* proxyLink = linkHyperText->mIntl.AsProxy();
+    if (proxyLink) {
+      *aIndex = mIntl.AsProxy()->LinkIndexOf(proxyLink);
+    }
+#endif
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleHyperText::GetLinkIndexAtOffset(int32_t aOffset,
+                                             int32_t* aLinkIndex) {
+  NS_ENSURE_ARG_POINTER(aLinkIndex);
+  *aLinkIndex = -1;  // API says this magic value means 'not found'
+
+  if (mIntl.IsNull()) return NS_ERROR_FAILURE;
+
+  if (mIntl.IsAccessible()) {
+    *aLinkIndex = Intl()->LinkIndexAtOffset(aOffset);
+  } else {
+#if defined(XP_WIN)
+    return NS_ERROR_NOT_IMPLEMENTED;
+#else
+    *aLinkIndex = mIntl.AsProxy()->LinkIndexAtOffset(aOffset);
+#endif
+  }
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleHyperText.h b/accessible/xpcom/xpcAccessibleHyperText.h
new file mode 100644
index 0000000000..447398c7a3
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleHyperText.h
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleHyperText_h_
+#define mozilla_a11y_xpcAccessibleHyperText_h_
+
+#include "nsIAccessibleText.h"
+#include "nsIAccessibleHyperText.h"
+#include "nsIAccessibleEditableText.h"
+
+#include "HyperTextAccessible.h"
+#include "xpcAccessibleGeneric.h"
+
+namespace mozilla {
+namespace a11y {
+
+class xpcAccessibleHyperText : public xpcAccessibleGeneric,
+                               public nsIAccessibleText,
+                               public nsIAccessibleEditableText,
+                               public nsIAccessibleHyperText {
+ public:
+  explicit xpcAccessibleHyperText(Accessible* aIntl)
+      : xpcAccessibleGeneric(aIntl) {
+    if (aIntl->IsHyperText() && aIntl->AsHyperText()->IsTextRole())
+      mSupportedIfaces |= eText;
+  }
+
+  xpcAccessibleHyperText(ProxyAccessible* aProxy, uint32_t aInterfaces)
+      : xpcAccessibleGeneric(aProxy, aInterfaces) {
+    mSupportedIfaces |= eText;
+  }
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_NSIACCESSIBLETEXT
+  NS_DECL_NSIACCESSIBLEHYPERTEXT
+  NS_DECL_NSIACCESSIBLEEDITABLETEXT
+
+ protected:
+  virtual ~xpcAccessibleHyperText() {}
+
+ private:
+  HyperTextAccessible* Intl() {
+    if (Accessible* acc = mIntl.AsAccessible()) {
+      return acc->AsHyperText();
+    }
+
+    return nullptr;
+  }
+
+  xpcAccessibleHyperText(const xpcAccessibleHyperText&) = delete;
+  xpcAccessibleHyperText& operator=(const xpcAccessibleHyperText&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_xpcAccessibleHyperText_h_
diff --git a/accessible/xpcom/xpcAccessibleImage.cpp b/accessible/xpcom/xpcAccessibleImage.cpp
new file mode 100644
index 0000000000..3a7fe79474
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleImage.cpp
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleImage.h"
+
+#include "ImageAccessible.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleImage, xpcAccessibleGeneric,
+                            nsIAccessibleImage)
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleImage
+
+NS_IMETHODIMP
+xpcAccessibleImage::GetImagePosition(uint32_t aCoordType, int32_t* aX,
+                                     int32_t* aY) {
+  NS_ENSURE_ARG_POINTER(aX);
+  *aX = 0;
+  NS_ENSURE_ARG_POINTER(aY);
+  *aY = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsIntPoint point = Intl()->Position(aCoordType);
+  *aX = point.x;
+  *aY = point.y;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleImage::GetImageSize(int32_t* aWidth, int32_t* aHeight) {
+  NS_ENSURE_ARG_POINTER(aWidth);
+  *aWidth = 0;
+  NS_ENSURE_ARG_POINTER(aHeight);
+  *aHeight = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsIntSize size = Intl()->Size();
+  *aWidth = size.width;
+  *aHeight = size.height;
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleImage.h b/accessible/xpcom/xpcAccessibleImage.h
new file mode 100644
index 0000000000..ad5244b0bf
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleImage.h
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleImage_h_
+#define mozilla_a11y_xpcAccessibleImage_h_
+
+#include "nsIAccessibleImage.h"
+
+#include "xpcAccessibleGeneric.h"
+
+namespace mozilla {
+namespace a11y {
+
+class xpcAccessibleImage : public xpcAccessibleGeneric,
+                           public nsIAccessibleImage {
+ public:
+  explicit xpcAccessibleImage(Accessible* aIntl)
+      : xpcAccessibleGeneric(aIntl) {}
+
+  xpcAccessibleImage(ProxyAccessible* aProxy, uint32_t aInterfaces)
+      : xpcAccessibleGeneric(aProxy, aInterfaces) {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_IMETHOD GetImagePosition(uint32_t aCoordType, int32_t* aX,
+                              int32_t* aY) final;
+  NS_IMETHOD GetImageSize(int32_t* aWidth, int32_t* aHeight) final;
+
+ protected:
+  virtual ~xpcAccessibleImage() {}
+
+ private:
+  ImageAccessible* Intl() {
+    return mIntl.IsAccessible() ? mIntl.AsAccessible()->AsImage() : nullptr;
+  }
+
+  xpcAccessibleImage(const xpcAccessibleImage&) = delete;
+  xpcAccessibleImage& operator=(const xpcAccessibleImage&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleMacInterface.h b/accessible/xpcom/xpcAccessibleMacInterface.h
new file mode 100644
index 0000000000..cb969022e0
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleMacInterface.h
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleMacInterface_h_
+#define mozilla_a11y_xpcAccessibleMacInterface_h_
+
+#include "nsIAccessibleMacInterface.h"
+
+#include "AccessibleOrProxy.h"
+
+class nsIAccessibleMacInterface;
+
+namespace mozilla {
+namespace a11y {
+
+class xpcAccessibleMacNSObjectWrapper : public nsIAccessibleMacNSObjectWrapper {
+ public:
+  explicit xpcAccessibleMacNSObjectWrapper(id aTextMarker);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIACCESSIBLEMACNSOBJECTWRAPPER;
+
+  // Get the wrapped NSObject for this interface.
+  id GetNativeObject() const final;
+
+ protected:
+  virtual ~xpcAccessibleMacNSObjectWrapper();
+
+  id mNativeObject;
+};
+
+class xpcAccessibleMacInterface : public xpcAccessibleMacNSObjectWrapper,
+                                  public nsIAccessibleMacInterface {
+ public:
+  // Construct an xpcAccessibleMacInterface using this
+  // native object that conforms to the NSAccessibility protocol.
+  explicit xpcAccessibleMacInterface(id aNativeObj)
+      : xpcAccessibleMacNSObjectWrapper(aNativeObj) {}
+
+  // Construct an xpcAccessibleMacInterface using the native object
+  // associated with this accessible or proxy.
+  explicit xpcAccessibleMacInterface(AccessibleOrProxy aObj);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIACCESSIBLEMACINTERFACE
+
+  // Convert an NSObject (which can be anything, string, number, array, etc.)
+  // into a properly typed js value populated in the aResult handle.
+  static nsresult NSObjectToJsValue(id aObj, JSContext* aCx,
+                                    JS::MutableHandleValue aResult);
+
+ protected:
+  virtual ~xpcAccessibleMacInterface() {}
+
+  // Return true if our native object responds to this selector and
+  // if it implements isAccessibilitySelectorAllowed check that it returns true
+  // too.
+  bool SupportsSelector(SEL aSelector);
+
+  // Convert a js value to an NSObject. This is called recursively for arrays.
+  // If the conversion fails, aResult is set to an error and nil is returned.
+  id JsValueToNSObject(JS::HandleValue aValue, JSContext* aCx,
+                       nsresult* aResult);
+
+  // Convert a js value to an NSValue NSObject. This is called
+  // by JsValueToNSObject when encountering a JS object with
+  // a "value" and "valueType" property.
+  id JsValueToNSValue(JS::HandleObject aObject, JSContext* aCx,
+                      nsresult* aResult);
+
+  // Convert a js value to a specified NSObject. This is called
+  // by JsValueToNSObject when encountering a JS object with
+  // a "object" and "objcetType" property.
+  id JsValueToSpecifiedNSObject(JS::HandleObject aObject, JSContext* aCx,
+                                nsresult* aResult);
+
+ private:
+  xpcAccessibleMacInterface(const xpcAccessibleMacInterface&) = delete;
+  xpcAccessibleMacInterface& operator=(const xpcAccessibleMacInterface&) =
+      delete;
+};
+
+class xpcAccessibleMacEvent : public nsIAccessibleMacEvent {
+ public:
+  explicit xpcAccessibleMacEvent(id aNativeObj, id aData);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIACCESSIBLEMACEVENT;
+
+  // This sends notifications via nsIObserverService to be consumed by our
+  // mochitests. aNativeObj is a NSAccessibility protocol object,
+  // and aNotification is a NSString.
+  static void FireEvent(id aNativeObj, id aNotification, id aUserInfo);
+
+ protected:
+  virtual ~xpcAccessibleMacEvent();
+
+  id mNativeObject;
+  id mData;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleMacInterface.mm b/accessible/xpcom/xpcAccessibleMacInterface.mm
new file mode 100644
index 0000000000..859505aa77
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleMacInterface.mm
@@ -0,0 +1,509 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleMacInterface.h"
+
+#include "nsCocoaUtils.h"
+#include "nsContentUtils.h"
+#include "nsIObserverService.h"
+#include "nsISimpleEnumerator.h"
+#include "nsIXPConnect.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "mozilla/Services.h"
+#include "nsString.h"
+
+#import "mozAccessible.h"
+
+using namespace mozilla::a11y;
+
+// xpcAccessibleMacNSObjectWrapper
+
+NS_IMPL_ISUPPORTS(xpcAccessibleMacNSObjectWrapper, nsIAccessibleMacNSObjectWrapper)
+
+xpcAccessibleMacNSObjectWrapper::xpcAccessibleMacNSObjectWrapper(id aNativeObj)
+    : mNativeObject(aNativeObj) {
+  [mNativeObject retain];
+}
+
+xpcAccessibleMacNSObjectWrapper::~xpcAccessibleMacNSObjectWrapper() { [mNativeObject release]; }
+
+id xpcAccessibleMacNSObjectWrapper::GetNativeObject() const { return mNativeObject; }
+
+// xpcAccessibleMacInterface
+
+NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleMacInterface, xpcAccessibleMacNSObjectWrapper,
+                            nsIAccessibleMacInterface)
+
+xpcAccessibleMacInterface::xpcAccessibleMacInterface(AccessibleOrProxy aObj)
+    : xpcAccessibleMacNSObjectWrapper(GetNativeFromGeckoAccessible(aObj)) {}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetAttributeNames(nsTArray<nsString>& aAttributeNames) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  for (NSString* name in [mNativeObject accessibilityAttributeNames]) {
+    nsAutoString attribName;
+    nsCocoaUtils::GetStringForNSString(name, attribName);
+    aAttributeNames.AppendElement(attribName);
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetParameterizedAttributeNames(nsTArray<nsString>& aAttributeNames) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  for (NSString* name in [mNativeObject accessibilityParameterizedAttributeNames]) {
+    nsAutoString attribName;
+    nsCocoaUtils::GetStringForNSString(name, attribName);
+    aAttributeNames.AppendElement(attribName);
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetActionNames(nsTArray<nsString>& aActionNames) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  for (NSString* name in [mNativeObject accessibilityActionNames]) {
+    nsAutoString actionName;
+    nsCocoaUtils::GetStringForNSString(name, actionName);
+    aActionNames.AppendElement(actionName);
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::PerformAction(const nsAString& aActionName) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  NSString* actionName = nsCocoaUtils::ToNSString(aActionName);
+  [mNativeObject accessibilityPerformAction:actionName];
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetAttributeValue(const nsAString& aAttributeName, JSContext* aCx,
+                                             JS::MutableHandleValue aResult) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName);
+  return NSObjectToJsValue([mNativeObject accessibilityAttributeValue:attribName], aCx, aResult);
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::IsAttributeSettable(const nsAString& aAttributeName, bool* aIsSettable) {
+  NS_ENSURE_ARG_POINTER(aIsSettable);
+
+  NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName);
+  if ([mNativeObject respondsToSelector:@selector(accessibilityIsAttributeSettable:)]) {
+    *aIsSettable = [mNativeObject accessibilityIsAttributeSettable:attribName];
+    return NS_OK;
+  }
+
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::SetAttributeValue(const nsAString& aAttributeName,
+                                             JS::HandleValue aAttributeValue, JSContext* aCx) {
+  nsresult rv = NS_OK;
+  id obj = JsValueToNSObject(aAttributeValue, aCx, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName);
+  if ([mNativeObject respondsToSelector:@selector(accessibilitySetValue:forAttribute:)]) {
+    // The NSObject has an attribute setter, call that.
+    [mNativeObject accessibilitySetValue:obj forAttribute:attribName];
+    return NS_OK;
+  }
+
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetParameterizedAttributeValue(const nsAString& aAttributeName,
+                                                          JS::HandleValue aParameter,
+                                                          JSContext* aCx,
+                                                          JS::MutableHandleValue aResult) {
+  nsresult rv = NS_OK;
+  id paramObj = JsValueToNSObject(aParameter, aCx, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName);
+  return NSObjectToJsValue(
+      [mNativeObject accessibilityAttributeValue:attribName forParameter:paramObj], aCx, aResult);
+
+  return NS_OK;
+}
+
+bool xpcAccessibleMacInterface::SupportsSelector(SEL aSelector) {
+  // return true if we have this selector, and if isAccessibilitySelectorAllowed
+  // is implemented too whether it is "allowed".
+  return [mNativeObject respondsToSelector:aSelector] &&
+         (![mNativeObject respondsToSelector:@selector(isAccessibilitySelectorAllowed:selector:)] ||
+          [mNativeObject isAccessibilitySelectorAllowed:aSelector]);
+}
+
+nsresult xpcAccessibleMacInterface::NSObjectToJsValue(id aObj, JSContext* aCx,
+                                                      JS::MutableHandleValue aResult) {
+  if (!aObj) {
+    aResult.set(JS::NullValue());
+  } else if ([aObj isKindOfClass:[NSString class]]) {
+    nsAutoString strVal;
+    nsCocoaUtils::GetStringForNSString((NSString*)aObj, strVal);
+    if (!mozilla::dom::ToJSValue(aCx, strVal, aResult)) {
+      return NS_ERROR_FAILURE;
+    }
+  } else if ([aObj isKindOfClass:[NSNumber class]]) {
+    // If the type being held by the NSNumber is a BOOL set js value
+    // to boolean. Otherwise use a double value.
+    if (strcmp([(NSNumber*)aObj objCType], @encode(BOOL)) == 0) {
+      if (!mozilla::dom::ToJSValue(aCx, [(NSNumber*)aObj boolValue], aResult)) {
+        return NS_ERROR_FAILURE;
+      }
+    } else {
+      if (!mozilla::dom::ToJSValue(aCx, [(NSNumber*)aObj doubleValue], aResult)) {
+        return NS_ERROR_FAILURE;
+      }
+    }
+  } else if ([aObj isKindOfClass:[NSValue class]] &&
+             strcmp([(NSValue*)aObj objCType], @encode(NSPoint)) == 0) {
+    NSPoint point = [(NSValue*)aObj pointValue];
+    return NSObjectToJsValue(
+        @[ [NSNumber numberWithDouble:point.x], [NSNumber numberWithDouble:point.y] ], aCx,
+        aResult);
+  } else if ([aObj isKindOfClass:[NSValue class]] &&
+             strcmp([(NSValue*)aObj objCType], @encode(NSSize)) == 0) {
+    NSSize size = [(NSValue*)aObj sizeValue];
+    return NSObjectToJsValue(
+        @[ [NSNumber numberWithDouble:size.width], [NSNumber numberWithDouble:size.height] ], aCx,
+        aResult);
+  } else if ([aObj isKindOfClass:[NSValue class]] &&
+             strcmp([(NSValue*)aObj objCType], @encode(NSRange)) == 0) {
+    NSRange range = [(NSValue*)aObj rangeValue];
+    return NSObjectToJsValue(@[ @(range.location), @(range.length) ], aCx, aResult);
+  } else if ([aObj isKindOfClass:[NSValue class]] &&
+             strcmp([(NSValue*)aObj objCType], @encode(NSRect)) == 0) {
+    NSRect rect = [(NSValue*)aObj rectValue];
+    return NSObjectToJsValue(@{
+      @"origin" : [NSValue valueWithPoint:rect.origin],
+      @"size" : [NSValue valueWithSize:rect.size]
+    },
+                             aCx, aResult);
+  } else if ([aObj isKindOfClass:[NSArray class]]) {
+    NSArray* objArr = (NSArray*)aObj;
+
+    JS::RootedVector<JS::Value> v(aCx);
+    if (!v.resize([objArr count])) {
+      return NS_ERROR_FAILURE;
+    }
+    for (size_t i = 0; i < [objArr count]; ++i) {
+      nsresult rv = NSObjectToJsValue(objArr[i], aCx, v[i]);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    JSObject* arrayObj = JS::NewArrayObject(aCx, v);
+    if (!arrayObj) {
+      return NS_ERROR_FAILURE;
+    }
+    aResult.setObject(*arrayObj);
+  } else if ([aObj isKindOfClass:[NSDictionary class]]) {
+    JS::RootedObject obj(aCx, JS_NewPlainObject(aCx));
+    for (NSString* key in aObj) {
+      nsAutoString strKey;
+      nsCocoaUtils::GetStringForNSString(key, strKey);
+      JS::RootedValue value(aCx);
+      nsresult rv = NSObjectToJsValue(aObj[key], aCx, &value);
+      NS_ENSURE_SUCCESS(rv, rv);
+      JS_SetUCProperty(aCx, obj, strKey.get(), strKey.Length(), value);
+    }
+    aResult.setObject(*obj);
+  } else if ([aObj respondsToSelector:@selector(isAccessibilityElement)]) {
+    // We expect all of our accessibility objects to implement isAccessibilityElement
+    // at the very least. If it is implemented we will assume its an accessibility object.
+    nsCOMPtr<nsIAccessibleMacInterface> obj = new xpcAccessibleMacInterface(aObj);
+    return nsContentUtils::WrapNative(aCx, obj, &NS_GET_IID(nsIAccessibleMacInterface), aResult);
+  } else {
+    // If this is any other kind of NSObject, just wrap it and return it.
+    // It will be opaque and immutable on the JS side, but it can be
+    // brought back to us in an argument.
+    nsCOMPtr<nsIAccessibleMacNSObjectWrapper> obj = new xpcAccessibleMacNSObjectWrapper(aObj);
+    return nsContentUtils::WrapNative(aCx, obj, &NS_GET_IID(nsIAccessibleMacNSObjectWrapper),
+                                      aResult);
+  }
+
+  return NS_OK;
+}
+
+id xpcAccessibleMacInterface::JsValueToNSObject(JS::HandleValue aValue, JSContext* aCx,
+                                                nsresult* aResult) {
+  *aResult = NS_OK;
+  if (aValue.isInt32()) {
+    return [NSNumber numberWithInteger:aValue.toInt32()];
+  } else if (aValue.isBoolean()) {
+    return [NSNumber numberWithBool:aValue.toBoolean()];
+  } else if (aValue.isString()) {
+    nsAutoJSString temp;
+    if (!temp.init(aCx, aValue)) {
+      NS_WARNING("cannot init string with given value");
+      *aResult = NS_ERROR_FAILURE;
+      return nil;
+    }
+    return nsCocoaUtils::ToNSString(temp);
+  } else if (aValue.isObject()) {
+    JS::Rooted<JSObject*> obj(aCx, aValue.toObjectOrNull());
+
+    bool isArray;
+    JS::IsArrayObject(aCx, obj, &isArray);
+    if (isArray) {
+      // If this is an array, we construct an NSArray and insert the js
+      // array's elements by recursively calling this function.
+      uint32_t len;
+      JS::GetArrayLength(aCx, obj, &len);
+      NSMutableArray* array = [NSMutableArray arrayWithCapacity:len];
+      for (uint32_t i = 0; i < len; i++) {
+        JS::RootedValue v(aCx);
+        JS_GetElement(aCx, obj, i, &v);
+        [array addObject:JsValueToNSObject(v, aCx, aResult)];
+        NS_ENSURE_SUCCESS(*aResult, nil);
+      }
+      return array;
+    }
+
+    bool hasValueType;
+    bool hasValue;
+    JS_HasOwnProperty(aCx, obj, "valueType", &hasValueType);
+    JS_HasOwnProperty(aCx, obj, "value", &hasValue);
+    if (hasValueType && hasValue) {
+      // A js object representin an NSValue looks like this:
+      // { valueType: "NSRange", value: [1, 3] }
+      return JsValueToNSValue(obj, aCx, aResult);
+    }
+
+    bool hasObjectType;
+    bool hasObject;
+    JS_HasOwnProperty(aCx, obj, "objectType", &hasObjectType);
+    JS_HasOwnProperty(aCx, obj, "object", &hasObject);
+    if (hasObjectType && hasObject) {
+      // A js object representing an NSDictionary looks like this:
+      // { objectType: "NSDictionary", value: {k: v, k: v, ...} }
+      return JsValueToSpecifiedNSObject(obj, aCx, aResult);
+    }
+
+    // This may be another nsIAccessibleMacInterface instance.
+    // If so, return the wrapped NSObject.
+    nsCOMPtr<nsIXPConnect> xpc = nsIXPConnect::XPConnect();
+
+    nsCOMPtr<nsIXPConnectWrappedNative> wrappedObj;
+    nsresult rv = xpc->GetWrappedNativeOfJSObject(aCx, obj, getter_AddRefs(wrappedObj));
+    NS_ENSURE_SUCCESS(rv, nil);
+    nsCOMPtr<nsIAccessibleMacNSObjectWrapper> macObjIface = do_QueryInterface(wrappedObj->Native());
+    return macObjIface->GetNativeObject();
+  }
+
+  *aResult = NS_ERROR_FAILURE;
+  return nil;
+}
+
+id xpcAccessibleMacInterface::JsValueToNSValue(JS::HandleObject aObject, JSContext* aCx,
+                                               nsresult* aResult) {
+  *aResult = NS_ERROR_FAILURE;
+  JS::RootedValue valueTypeValue(aCx);
+  if (!JS_GetProperty(aCx, aObject, "valueType", &valueTypeValue)) {
+    NS_WARNING("Could not get valueType");
+    return nil;
+  }
+
+  JS::RootedValue valueValue(aCx);
+  if (!JS_GetProperty(aCx, aObject, "value", &valueValue)) {
+    NS_WARNING("Could not get value");
+    return nil;
+  }
+
+  nsAutoJSString valueType;
+  if (!valueTypeValue.isString() || !valueType.init(aCx, valueTypeValue)) {
+    NS_WARNING("valueType is not a string");
+    return nil;
+  }
+
+  bool isArray;
+  JS::IsArrayObject(aCx, valueValue, &isArray);
+  if (!isArray) {
+    NS_WARNING("value is not an array");
+    return nil;
+  }
+
+  JS::Rooted<JSObject*> value(aCx, valueValue.toObjectOrNull());
+
+  if (valueType.EqualsLiteral("NSRange")) {
+    uint32_t len;
+    JS::GetArrayLength(aCx, value, &len);
+    if (len != 2) {
+      NS_WARNING("Expected a 2 member array");
+      return nil;
+    }
+
+    JS::RootedValue locationValue(aCx);
+    JS_GetElement(aCx, value, 0, &locationValue);
+    JS::RootedValue lengthValue(aCx);
+    JS_GetElement(aCx, value, 1, &lengthValue);
+    if (!locationValue.isInt32() || !lengthValue.isInt32()) {
+      NS_WARNING("Expected an array of integers");
+      return nil;
+    }
+
+    *aResult = NS_OK;
+    return [NSValue valueWithRange:NSMakeRange(locationValue.toInt32(), lengthValue.toInt32())];
+  }
+
+  return nil;
+}
+
+id xpcAccessibleMacInterface::JsValueToSpecifiedNSObject(JS::HandleObject aObject, JSContext* aCx,
+                                                         nsresult* aResult) {
+  *aResult = NS_ERROR_FAILURE;
+  JS::RootedValue objectTypeValue(aCx);
+  if (!JS_GetProperty(aCx, aObject, "objectType", &objectTypeValue)) {
+    NS_WARNING("Could not get objectType");
+    return nil;
+  }
+
+  JS::RootedValue objectValue(aCx);
+  if (!JS_GetProperty(aCx, aObject, "object", &objectValue)) {
+    NS_WARNING("Could not get object");
+    return nil;
+  }
+
+  nsAutoJSString objectType;
+  if (!objectTypeValue.isString()) {
+    NS_WARNING("objectType is not a string");
+    return nil;
+  }
+
+  if (!objectType.init(aCx, objectTypeValue)) {
+    NS_WARNING("cannot init string with object type");
+    return nil;
+  }
+
+  bool isObject = objectValue.isObjectOrNull();
+  if (!isObject) {
+    NS_WARNING("object is not a JSON object");
+    return nil;
+  }
+
+  JS::Rooted<JSObject*> object(aCx, objectValue.toObjectOrNull());
+
+  if (objectType.EqualsLiteral("NSDictionary")) {
+    JS::Rooted<JS::IdVector> ids(aCx, JS::IdVector(aCx));
+    if (!JS_Enumerate(aCx, object, &ids)) {
+      NS_WARNING("Unable to get keys from dictionary object");
+      return nil;
+    }
+
+    NSMutableDictionary* dict = [[NSMutableDictionary alloc] init];
+
+    for (size_t i = 0, n = ids.length(); i < n; i++) {
+      nsresult rv = NS_OK;
+      // get current key
+      JS::RootedValue currentKey(aCx);
+      JS_IdToValue(aCx, ids[i], &currentKey);
+      id unwrappedKey = JsValueToNSObject(currentKey, aCx, &rv);
+      NS_ENSURE_SUCCESS(rv, nil);
+      MOZ_ASSERT([unwrappedKey isKindOfClass:[NSString class]]);
+
+      // get associated value for current key
+      JS::RootedValue currentValue(aCx);
+      JS_GetPropertyById(aCx, object, ids[i], &currentValue);
+      id unwrappedValue = JsValueToNSObject(currentValue, aCx, &rv);
+      NS_ENSURE_SUCCESS(rv, nil);
+      dict[unwrappedKey] = unwrappedValue;
+    }
+
+    *aResult = NS_OK;
+    return dict;
+  }
+
+  return nil;
+}
+
+NS_IMPL_ISUPPORTS(xpcAccessibleMacEvent, nsIAccessibleMacEvent)
+
+xpcAccessibleMacEvent::xpcAccessibleMacEvent(id aNativeObj, id aData)
+    : mNativeObject(aNativeObj), mData(aData) {
+  [mNativeObject retain];
+  [mData retain];
+}
+
+xpcAccessibleMacEvent::~xpcAccessibleMacEvent() {
+  [mNativeObject release];
+  [mData release];
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacEvent::GetMacIface(nsIAccessibleMacInterface** aMacIface) {
+  RefPtr<xpcAccessibleMacInterface> macIface = new xpcAccessibleMacInterface(mNativeObject);
+  macIface.forget(aMacIface);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleMacEvent::GetData(JSContext* aCx, JS::MutableHandleValue aData) {
+  return xpcAccessibleMacInterface::NSObjectToJsValue(mData, aCx, aData);
+}
+
+void xpcAccessibleMacEvent::FireEvent(id aNativeObj, id aNotification, id aUserInfo) {
+  if (nsCOMPtr<nsIObserverService> obsService = services::GetObserverService()) {
+    nsCOMPtr<nsISimpleEnumerator> observers;
+    // Get all observers for the mac event topic.
+    obsService->EnumerateObservers(NS_ACCESSIBLE_MAC_EVENT_TOPIC, getter_AddRefs(observers));
+    if (observers) {
+      bool hasObservers = false;
+      observers->HasMoreElements(&hasObservers);
+      // If we have observers, notify them.
+      if (hasObservers) {
+        nsCOMPtr<nsIAccessibleMacEvent> xpcIface = new xpcAccessibleMacEvent(aNativeObj, aUserInfo);
+        nsAutoString notificationStr;
+        nsCocoaUtils::GetStringForNSString(aNotification, notificationStr);
+        obsService->NotifyObservers(xpcIface, NS_ACCESSIBLE_MAC_EVENT_TOPIC, notificationStr.get());
+      }
+    }
+  }
+}
diff --git a/accessible/xpcom/xpcAccessibleSelectable.cpp b/accessible/xpcom/xpcAccessibleSelectable.cpp
new file mode 100644
index 0000000000..9e24391f95
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleSelectable.cpp
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "Accessible-inl.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsIAccessible.h"
+#include "nsIMutableArray.h"
+#include "xpcAccessibleDocument.h"
+#include "xpcAccessibleSelectable.h"
+
+using namespace mozilla::a11y;
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItems(nsIArray** aSelectedItems) {
+  NS_ENSURE_ARG_POINTER(aSelectedItems);
+  *aSelectedItems = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  AutoTArray<Accessible*, 10> items;
+  Intl()->SelectedItems(&items);
+
+  uint32_t itemCount = items.Length();
+  if (itemCount == 0) return NS_OK;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> xpcItems =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  for (uint32_t idx = 0; idx < itemCount; idx++)
+    xpcItems->AppendElement(static_cast<nsIAccessible*>(ToXPC(items[idx])));
+
+  NS_ADDREF(*aSelectedItems = xpcItems);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItemCount(uint32_t* aSelectionCount) {
+  NS_ENSURE_ARG_POINTER(aSelectionCount);
+  *aSelectionCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  *aSelectionCount = Intl()->SelectedItemCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItemAt(uint32_t aIndex,
+                                           nsIAccessible** aSelected) {
+  NS_ENSURE_ARG_POINTER(aSelected);
+  *aSelected = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  *aSelected = ToXPC(Intl()->GetSelectedItem(aIndex));
+  if (*aSelected) {
+    NS_ADDREF(*aSelected);
+    return NS_OK;
+  }
+
+  return NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::IsItemSelected(uint32_t aIndex, bool* aIsSelected) {
+  NS_ENSURE_ARG_POINTER(aIsSelected);
+  *aIsSelected = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  *aIsSelected = Intl()->IsItemSelected(aIndex);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::AddItemToSelection(uint32_t aIndex) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  return Intl()->AddItemToSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::RemoveItemFromSelection(uint32_t aIndex) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  return Intl()->RemoveItemFromSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::SelectAll(bool* aIsMultiSelect) {
+  NS_ENSURE_ARG_POINTER(aIsMultiSelect);
+  *aIsMultiSelect = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  *aIsMultiSelect = Intl()->SelectAll();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::UnselectAll() {
+  if (!Intl()) return NS_ERROR_FAILURE;
+  MOZ_ASSERT(Intl()->IsSelect(), "Called on non selectable widget!");
+
+  Intl()->UnselectAll();
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleSelectable.h b/accessible/xpcom/xpcAccessibleSelectable.h
new file mode 100644
index 0000000000..706690df2e
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleSelectable.h
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleSelectable_h_
+#define mozilla_a11y_xpcAccessibleSelectable_h_
+
+#include "nsIAccessibleSelectable.h"
+
+class nsIAccessible;
+class nsIArray;
+
+namespace mozilla {
+namespace a11y {
+
+class Accessible;
+
+/**
+ * XPCOM nsIAccessibleSelectable inteface implementation, used by
+ * xpcAccessibleGeneric class.
+ */
+class xpcAccessibleSelectable : public nsIAccessibleSelectable {
+ public:
+  // nsIAccessibleSelectable
+  NS_IMETHOD GetSelectedItems(nsIArray** aSelectedItems) final;
+  NS_IMETHOD GetSelectedItemCount(uint32_t* aSelectedItemCount) final;
+  NS_IMETHOD GetSelectedItemAt(uint32_t aIndex, nsIAccessible** aItem) final;
+  NS_IMETHOD IsItemSelected(uint32_t aIndex, bool* aIsSelected) final;
+  NS_IMETHOD AddItemToSelection(uint32_t aIndex) final;
+  NS_IMETHOD RemoveItemFromSelection(uint32_t aIndex) final;
+  NS_IMETHOD SelectAll(bool* aIsMultiSelect) final;
+  NS_IMETHOD UnselectAll() final;
+
+ protected:
+  xpcAccessibleSelectable() {}
+  virtual ~xpcAccessibleSelectable() {}
+
+ private:
+  xpcAccessibleSelectable(const xpcAccessibleSelectable&) = delete;
+  xpcAccessibleSelectable& operator=(const xpcAccessibleSelectable&) = delete;
+
+  Accessible* Intl();
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleTable.cpp b/accessible/xpcom/xpcAccessibleTable.cpp
new file mode 100644
index 0000000000..97e5941dfa
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTable.cpp
@@ -0,0 +1,395 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleTable.h"
+
+#include "Accessible.h"
+#include "TableAccessible.h"
+
+#include "nsIMutableArray.h"
+#include "nsComponentManagerUtils.h"
+#include "xpcAccessibleDocument.h"
+
+using namespace mozilla::a11y;
+
+static const uint32_t XPC_TABLE_DEFAULT_SIZE = 40;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleTable, xpcAccessibleHyperText,
+                            nsIAccessibleTable)
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleTable
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetCaption(nsIAccessible** aCaption) {
+  NS_ENSURE_ARG_POINTER(aCaption);
+  *aCaption = nullptr;
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  NS_IF_ADDREF(*aCaption = ToXPC(Intl()->Caption()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetColumnCount(int32_t* aColumnCount) {
+  NS_ENSURE_ARG_POINTER(aColumnCount);
+  *aColumnCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aColumnCount = Intl()->ColCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetRowCount(int32_t* aRowCount) {
+  NS_ENSURE_ARG_POINTER(aRowCount);
+  *aRowCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aRowCount = Intl()->RowCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetCellAt(int32_t aRowIdx, int32_t aColIdx,
+                              nsIAccessible** aCell) {
+  NS_ENSURE_ARG_POINTER(aCell);
+  *aCell = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount() ||
+      aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  NS_IF_ADDREF(*aCell = ToXPC(Intl()->CellAt(aRowIdx, aColIdx)));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetCellIndexAt(int32_t aRowIdx, int32_t aColIdx,
+                                   int32_t* aCellIdx) {
+  NS_ENSURE_ARG_POINTER(aCellIdx);
+  *aCellIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount() ||
+      aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aCellIdx = Intl()->CellIndexAt(aRowIdx, aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetColumnExtentAt(int32_t aRowIdx, int32_t aColIdx,
+                                      int32_t* aColumnExtent) {
+  NS_ENSURE_ARG_POINTER(aColumnExtent);
+  *aColumnExtent = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount() ||
+      aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aColumnExtent = Intl()->ColExtentAt(aRowIdx, aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetRowExtentAt(int32_t aRowIdx, int32_t aColIdx,
+                                   int32_t* aRowExtent) {
+  NS_ENSURE_ARG_POINTER(aRowExtent);
+  *aRowExtent = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount() ||
+      aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aRowExtent = Intl()->RowExtentAt(aRowIdx, aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetColumnDescription(int32_t aColIdx,
+                                         nsAString& aDescription) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  nsAutoString description;
+  Intl()->ColDescription(aColIdx, description);
+  aDescription.Assign(description);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetRowDescription(int32_t aRowIdx,
+                                      nsAString& aDescription) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  nsAutoString description;
+  Intl()->RowDescription(aRowIdx, description);
+  aDescription.Assign(description);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::IsColumnSelected(int32_t aColIdx, bool* aIsSelected) {
+  NS_ENSURE_ARG_POINTER(aIsSelected);
+  *aIsSelected = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aIsSelected = Intl()->IsColSelected(aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::IsRowSelected(int32_t aRowIdx, bool* aIsSelected) {
+  NS_ENSURE_ARG_POINTER(aIsSelected);
+  *aIsSelected = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aIsSelected = Intl()->IsRowSelected(aRowIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::IsCellSelected(int32_t aRowIdx, int32_t aColIdx,
+                                   bool* aIsSelected) {
+  NS_ENSURE_ARG_POINTER(aIsSelected);
+  *aIsSelected = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount() ||
+      aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aIsSelected = Intl()->IsCellSelected(aRowIdx, aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedCellCount(uint32_t* aSelectedCellCount) {
+  NS_ENSURE_ARG_POINTER(aSelectedCellCount);
+  *aSelectedCellCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aSelectedCellCount = Intl()->SelectedCellCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedColumnCount(uint32_t* aSelectedColumnCount) {
+  NS_ENSURE_ARG_POINTER(aSelectedColumnCount);
+  *aSelectedColumnCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aSelectedColumnCount = Intl()->SelectedColCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedRowCount(uint32_t* aSelectedRowCount) {
+  NS_ENSURE_ARG_POINTER(aSelectedRowCount);
+  *aSelectedRowCount = 0;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aSelectedRowCount = Intl()->SelectedRowCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedCells(nsIArray** aSelectedCells) {
+  NS_ENSURE_ARG_POINTER(aSelectedCells);
+  *aSelectedCells = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> selCells =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  AutoTArray<Accessible*, XPC_TABLE_DEFAULT_SIZE> cellsArray;
+  Intl()->SelectedCells(&cellsArray);
+
+  uint32_t totalCount = cellsArray.Length();
+  for (uint32_t idx = 0; idx < totalCount; idx++) {
+    Accessible* cell = cellsArray.ElementAt(idx);
+    selCells->AppendElement(static_cast<nsIAccessible*>(ToXPC(cell)));
+  }
+
+  NS_ADDREF(*aSelectedCells = selCells);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedCellIndices(nsTArray<uint32_t>& aCellsArray) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->SelectedCellIndices(&aCellsArray);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedColumnIndices(nsTArray<uint32_t>& aColsArray) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->SelectedColIndices(&aColsArray);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSelectedRowIndices(nsTArray<uint32_t>& aRowsArray) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  Intl()->SelectedRowIndices(&aRowsArray);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetColumnIndexAt(int32_t aCellIdx, int32_t* aColIdx) {
+  NS_ENSURE_ARG_POINTER(aColIdx);
+  *aColIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aCellIdx < 0 || static_cast<uint32_t>(aCellIdx) >=
+                          Intl()->RowCount() * Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aColIdx = Intl()->ColIndexAt(aCellIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetRowIndexAt(int32_t aCellIdx, int32_t* aRowIdx) {
+  NS_ENSURE_ARG_POINTER(aRowIdx);
+  *aRowIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aCellIdx < 0 || static_cast<uint32_t>(aCellIdx) >=
+                          Intl()->RowCount() * Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  *aRowIdx = Intl()->RowIndexAt(aCellIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetRowAndColumnIndicesAt(int32_t aCellIdx, int32_t* aRowIdx,
+                                             int32_t* aColIdx) {
+  NS_ENSURE_ARG_POINTER(aRowIdx);
+  *aRowIdx = -1;
+  NS_ENSURE_ARG_POINTER(aColIdx);
+  *aColIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aCellIdx < 0 || static_cast<uint32_t>(aCellIdx) >=
+                          Intl()->RowCount() * Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  Intl()->RowAndColIndicesAt(aCellIdx, aRowIdx, aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::GetSummary(nsAString& aSummary) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  nsAutoString summary;
+  Intl()->Summary(summary);
+  aSummary.Assign(summary);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::IsProbablyForLayout(bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = false;
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aResult = Intl()->IsProbablyLayoutTable();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::SelectColumn(int32_t aColIdx) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  Intl()->SelectCol(aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::SelectRow(int32_t aRowIdx) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount())
+    return NS_ERROR_INVALID_ARG;
+
+  Intl()->SelectRow(aRowIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::UnselectColumn(int32_t aColIdx) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= Intl()->ColCount())
+    return NS_ERROR_INVALID_ARG;
+
+  Intl()->UnselectCol(aColIdx);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTable::UnselectRow(int32_t aRowIdx) {
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= Intl()->RowCount())
+    return NS_ERROR_INVALID_ARG;
+
+  Intl()->UnselectRow(aRowIdx);
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleTable.h b/accessible/xpcom/xpcAccessibleTable.h
new file mode 100644
index 0000000000..2875b39f92
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTable.h
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleTable_h_
+#define mozilla_a11y_xpcAccessibleTable_h_
+
+#include "nsIAccessibleTable.h"
+#include "xpcAccessibleHyperText.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XPCOM wrapper around TableAccessible class.
+ */
+class xpcAccessibleTable : public xpcAccessibleHyperText,
+                           public nsIAccessibleTable {
+ public:
+  explicit xpcAccessibleTable(Accessible* aIntl)
+      : xpcAccessibleHyperText(aIntl) {}
+
+  xpcAccessibleTable(ProxyAccessible* aProxy, uint32_t aInterfaces)
+      : xpcAccessibleHyperText(aProxy, aInterfaces) {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIAccessibleTable
+  NS_IMETHOD GetCaption(nsIAccessible** aCaption) final;
+  NS_IMETHOD GetSummary(nsAString& aSummary) final;
+  NS_IMETHOD GetColumnCount(int32_t* aColumnCount) final;
+  NS_IMETHOD GetRowCount(int32_t* aRowCount) final;
+  NS_IMETHOD GetCellAt(int32_t aRowIndex, int32_t aColumnIndex,
+                       nsIAccessible** aCell) final;
+  NS_IMETHOD GetCellIndexAt(int32_t aRowIndex, int32_t aColumnIndex,
+                            int32_t* aCellIndex) final;
+  NS_IMETHOD GetColumnIndexAt(int32_t aCellIndex, int32_t* aColumnIndex) final;
+  NS_IMETHOD GetRowIndexAt(int32_t aCellIndex, int32_t* aRowIndex) final;
+  NS_IMETHOD GetRowAndColumnIndicesAt(int32_t aCellIndex, int32_t* aRowIndex,
+                                      int32_t* aColumnIndex) final;
+  NS_IMETHOD GetColumnExtentAt(int32_t row, int32_t column,
+                               int32_t* aColumnExtent) final;
+  NS_IMETHOD GetRowExtentAt(int32_t row, int32_t column,
+                            int32_t* aRowExtent) final;
+  NS_IMETHOD GetColumnDescription(int32_t aColIdx,
+                                  nsAString& aDescription) final;
+  NS_IMETHOD GetRowDescription(int32_t aRowIdx, nsAString& aDescription) final;
+  NS_IMETHOD IsColumnSelected(int32_t aColIdx, bool* _retval) final;
+  NS_IMETHOD IsRowSelected(int32_t aRowIdx, bool* _retval) final;
+  NS_IMETHOD IsCellSelected(int32_t aRowIdx, int32_t aColIdx,
+                            bool* _retval) final;
+  NS_IMETHOD GetSelectedCellCount(uint32_t* aSelectedCellCount) final;
+  NS_IMETHOD GetSelectedColumnCount(uint32_t* aSelectedColumnCount) final;
+  NS_IMETHOD GetSelectedRowCount(uint32_t* aSelectedRowCount) final;
+  NS_IMETHOD GetSelectedCells(nsIArray** aSelectedCell) final;
+  NS_IMETHOD GetSelectedCellIndices(nsTArray<uint32_t>& aCellsArray) final;
+  NS_IMETHOD GetSelectedColumnIndices(nsTArray<uint32_t>& aColsArray) final;
+  NS_IMETHOD GetSelectedRowIndices(nsTArray<uint32_t>& aRowsArray) final;
+  NS_IMETHOD SelectColumn(int32_t aColIdx) final;
+  NS_IMETHOD SelectRow(int32_t aRowIdx) final;
+  NS_IMETHOD UnselectColumn(int32_t aColIdx) final;
+  NS_IMETHOD UnselectRow(int32_t aRowIdx) final;
+  NS_IMETHOD IsProbablyForLayout(bool* aIsForLayout) final;
+
+ protected:
+  virtual ~xpcAccessibleTable() {}
+
+ private:
+  TableAccessible* Intl() {
+    return mIntl.IsAccessible() ? mIntl.AsAccessible()->AsTable() : nullptr;
+  }
+
+  xpcAccessibleTable(const xpcAccessibleTable&) = delete;
+  xpcAccessibleTable& operator=(const xpcAccessibleTable&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_xpcAccessibleTable_h_
diff --git a/accessible/xpcom/xpcAccessibleTableCell.cpp b/accessible/xpcom/xpcAccessibleTableCell.cpp
new file mode 100644
index 0000000000..9deb2a4213
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTableCell.cpp
@@ -0,0 +1,141 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleTableCell.h"
+
+#include "Accessible.h"
+#include "nsIAccessibleTable.h"
+#include "TableAccessible.h"
+#include "TableCellAccessible.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsIMutableArray.h"
+#include "xpcAccessibleDocument.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(xpcAccessibleTableCell, xpcAccessibleHyperText,
+                            nsIAccessibleTableCell)
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessibleTableCell
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetTable(nsIAccessibleTable** aTable) {
+  NS_ENSURE_ARG_POINTER(aTable);
+  *aTable = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  TableAccessible* table = Intl()->Table();
+  if (!table) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIAccessibleTable> xpcTable = do_QueryInterface(
+      static_cast<nsIAccessible*>(ToXPC(table->AsAccessible())));
+  xpcTable.forget(aTable);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetColumnIndex(int32_t* aColIdx) {
+  NS_ENSURE_ARG_POINTER(aColIdx);
+  *aColIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aColIdx = Intl()->ColIdx();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetRowIndex(int32_t* aRowIdx) {
+  NS_ENSURE_ARG_POINTER(aRowIdx);
+  *aRowIdx = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aRowIdx = Intl()->RowIdx();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetColumnExtent(int32_t* aExtent) {
+  NS_ENSURE_ARG_POINTER(aExtent);
+  *aExtent = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aExtent = Intl()->ColExtent();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetRowExtent(int32_t* aExtent) {
+  NS_ENSURE_ARG_POINTER(aExtent);
+  *aExtent = -1;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aExtent = Intl()->RowExtent();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetColumnHeaderCells(nsIArray** aHeaderCells) {
+  NS_ENSURE_ARG_POINTER(aHeaderCells);
+  *aHeaderCells = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  AutoTArray<Accessible*, 10> headerCells;
+  Intl()->ColHeaderCells(&headerCells);
+
+  nsCOMPtr<nsIMutableArray> cells = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  NS_ENSURE_TRUE(cells, NS_ERROR_FAILURE);
+
+  for (uint32_t idx = 0; idx < headerCells.Length(); idx++) {
+    cells->AppendElement(static_cast<nsIAccessible*>(ToXPC(headerCells[idx])));
+  }
+
+  NS_ADDREF(*aHeaderCells = cells);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::GetRowHeaderCells(nsIArray** aHeaderCells) {
+  NS_ENSURE_ARG_POINTER(aHeaderCells);
+  *aHeaderCells = nullptr;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  AutoTArray<Accessible*, 10> headerCells;
+  Intl()->RowHeaderCells(&headerCells);
+
+  nsCOMPtr<nsIMutableArray> cells = do_CreateInstance(NS_ARRAY_CONTRACTID);
+  NS_ENSURE_TRUE(cells, NS_ERROR_FAILURE);
+
+  for (uint32_t idx = 0; idx < headerCells.Length(); idx++) {
+    cells->AppendElement(static_cast<nsIAccessible*>(ToXPC(headerCells[idx])));
+  }
+
+  NS_ADDREF(*aHeaderCells = cells);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTableCell::IsSelected(bool* aSelected) {
+  NS_ENSURE_ARG_POINTER(aSelected);
+  *aSelected = false;
+
+  if (!Intl()) return NS_ERROR_FAILURE;
+
+  *aSelected = Intl()->Selected();
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleTableCell.h b/accessible/xpcom/xpcAccessibleTableCell.h
new file mode 100644
index 0000000000..abfc68ca9e
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTableCell.h
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcom_xpcAccessibletableCell_h_
+#define mozilla_a11y_xpcom_xpcAccessibletableCell_h_
+
+#include "nsIAccessibleTable.h"
+
+#include "xpcAccessibleHyperText.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XPCOM wrapper around TableAccessibleCell class.
+ */
+class xpcAccessibleTableCell : public xpcAccessibleHyperText,
+                               public nsIAccessibleTableCell {
+ public:
+  explicit xpcAccessibleTableCell(Accessible* aIntl)
+      : xpcAccessibleHyperText(aIntl) {}
+
+  xpcAccessibleTableCell(ProxyAccessible* aProxy, uint32_t aInterfaces)
+      : xpcAccessibleHyperText(aProxy, aInterfaces) {}
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIAccessibleTableCell
+  NS_IMETHOD GetTable(nsIAccessibleTable** aTable) final;
+  NS_IMETHOD GetColumnIndex(int32_t* aColIdx) final;
+  NS_IMETHOD GetRowIndex(int32_t* aRowIdx) final;
+  NS_IMETHOD GetColumnExtent(int32_t* aExtent) final;
+  NS_IMETHOD GetRowExtent(int32_t* aExtent) final;
+  NS_IMETHOD GetColumnHeaderCells(nsIArray** aHeaderCells) final;
+  NS_IMETHOD GetRowHeaderCells(nsIArray** aHeaderCells) final;
+  NS_IMETHOD IsSelected(bool* aSelected) final;
+
+ protected:
+  virtual ~xpcAccessibleTableCell() {}
+
+ private:
+  TableCellAccessible* Intl() {
+    if (Accessible* acc = mIntl.AsAccessible()) {
+      return acc->AsTableCell();
+    }
+
+    return nullptr;
+  }
+
+  xpcAccessibleTableCell(const xpcAccessibleTableCell&) = delete;
+  xpcAccessibleTableCell& operator=(const xpcAccessibleTableCell&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_xpcom_xpcAccessibletableCell_h_
diff --git a/accessible/xpcom/xpcAccessibleTextRange.cpp b/accessible/xpcom/xpcAccessibleTextRange.cpp
new file mode 100644
index 0000000000..0ffcc6bd0b
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTextRange.cpp
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleTextRange.h"
+
+#include "TextRange-inl.h"
+
+#include "nsIMutableArray.h"
+#include "nsComponentManagerUtils.h"
+#include "nsQueryObject.h"
+#include "xpcAccessibleDocument.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+// nsISupports and cycle collection
+
+NS_IMPL_CYCLE_COLLECTION(xpcAccessibleTextRange, mRange.mRoot,
+                         mRange.mStartContainer, mRange.mEndContainer)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(xpcAccessibleTextRange)
+  NS_INTERFACE_MAP_ENTRY(nsIAccessibleTextRange)
+  NS_INTERFACE_MAP_ENTRY(xpcAccessibleTextRange)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIAccessibleTextRange)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(xpcAccessibleTextRange)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(xpcAccessibleTextRange)
+
+// nsIAccessibleTextRange
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetStartContainer(nsIAccessibleText** aAnchor) {
+  NS_ENSURE_ARG_POINTER(aAnchor);
+  NS_IF_ADDREF(*aAnchor = ToXPCText(mRange.StartContainer()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetStartOffset(int32_t* aOffset) {
+  NS_ENSURE_ARG_POINTER(aOffset);
+  *aOffset = mRange.StartOffset();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetEndContainer(nsIAccessibleText** aAnchor) {
+  NS_ENSURE_ARG_POINTER(aAnchor);
+  NS_IF_ADDREF(*aAnchor = ToXPCText(mRange.EndContainer()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetEndOffset(int32_t* aOffset) {
+  NS_ENSURE_ARG_POINTER(aOffset);
+  *aOffset = mRange.EndOffset();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetContainer(nsIAccessible** aContainer) {
+  NS_ENSURE_ARG_POINTER(aContainer);
+  NS_IF_ADDREF(*aContainer = ToXPC(mRange.Container()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetEmbeddedChildren(nsIArray** aList) {
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIMutableArray> xpcList =
+      do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsTArray<Accessible*> objects;
+  mRange.EmbeddedChildren(&objects);
+
+  uint32_t len = objects.Length();
+  for (uint32_t idx = 0; idx < len; idx++)
+    xpcList->AppendElement(static_cast<nsIAccessible*>(ToXPC(objects[idx])));
+
+  xpcList.forget(aList);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::Compare(nsIAccessibleTextRange* aOtherRange,
+                                bool* aResult) {
+  RefPtr<xpcAccessibleTextRange> xpcRange(do_QueryObject(aOtherRange));
+  if (!xpcRange || !aResult) return NS_ERROR_INVALID_ARG;
+
+  *aResult = (mRange == xpcRange->mRange);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::CompareEndPoints(uint32_t aEndPoint,
+                                         nsIAccessibleTextRange* aOtherRange,
+                                         uint32_t aOtherRangeEndPoint,
+                                         int32_t* aResult) {
+  RefPtr<xpcAccessibleTextRange> xpcRange(do_QueryObject(aOtherRange));
+  if (!xpcRange || !aResult) return NS_ERROR_INVALID_ARG;
+
+  TextPoint p =
+      (aEndPoint == EndPoint_Start) ? mRange.StartPoint() : mRange.EndPoint();
+  TextPoint otherPoint = (aOtherRangeEndPoint == EndPoint_Start)
+                             ? xpcRange->mRange.StartPoint()
+                             : xpcRange->mRange.EndPoint();
+
+  if (p == otherPoint)
+    *aResult = 0;
+  else
+    *aResult = p < otherPoint ? -1 : 1;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetText(nsAString& aText) {
+  nsAutoString text;
+  mRange.Text(text);
+  aText.Assign(text);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::GetBounds(nsIArray** aRectList) { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::Move(uint32_t aUnit, int32_t aCount) { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::MoveStart(uint32_t aUnit, int32_t aCount) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::MoveEnd(uint32_t aUnit, int32_t aCount) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::Normalize(uint32_t aUnit) { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::Crop(nsIAccessible* aContainer, bool* aSuccess) {
+  Accessible* container = aContainer->ToInternalAccessible();
+  NS_ENSURE_TRUE(container, NS_ERROR_INVALID_ARG);
+
+  *aSuccess = mRange.Crop(container);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::FindText(const nsAString& aText, bool aIsBackward,
+                                 bool aIsIgnoreCase,
+                                 nsIAccessibleTextRange** aRange) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::FindAttr(uint32_t aAttr, nsIVariant* aVal,
+                                 bool aIsBackward,
+                                 nsIAccessibleTextRange** aRange) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::AddToSelection() { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::RemoveFromSelection() { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::Select() { return NS_OK; }
+
+NS_IMETHODIMP
+xpcAccessibleTextRange::ScrollIntoView(uint32_t aHow) { return NS_OK; }
diff --git a/accessible/xpcom/xpcAccessibleTextRange.h b/accessible/xpcom/xpcAccessibleTextRange.h
new file mode 100644
index 0000000000..0f73934b6b
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleTextRange.h
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleTextRange_h_
+#define mozilla_a11y_xpcAccessibleTextRange_h_
+
+#include <utility>
+
+#include "TextRange.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIAccessibleTextRange.h"
+
+namespace mozilla {
+namespace a11y {
+
+class TextRange;
+
+#define NS_ACCESSIBLETEXTRANGE_IMPL_IID              \
+  { /* 133c8bf4-4913-4355-bd50-426bd1d6e1ad */       \
+    0xb17652d9, 0x4f54, 0x4c56, {                    \
+      0xbb, 0x62, 0x6d, 0x5b, 0xf1, 0xef, 0x91, 0x0c \
+    }                                                \
+  }
+
+class xpcAccessibleTextRange final : public nsIAccessibleTextRange {
+ public:
+  explicit xpcAccessibleTextRange(TextRange&& aRange)
+      : mRange(std::forward<TextRange>(aRange)) {}
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(xpcAccessibleTextRange)
+
+  NS_IMETHOD GetStartContainer(nsIAccessibleText** aAnchor) final;
+  NS_IMETHOD GetStartOffset(int32_t* aOffset) final;
+  NS_IMETHOD GetEndContainer(nsIAccessibleText** aAnchor) final;
+  NS_IMETHOD GetEndOffset(int32_t* aOffset) final;
+  NS_IMETHOD GetContainer(nsIAccessible** aContainer) final;
+  NS_IMETHOD GetEmbeddedChildren(nsIArray** aList) final;
+  NS_IMETHOD Compare(nsIAccessibleTextRange* aOtherRange, bool* aResult) final;
+  NS_IMETHOD CompareEndPoints(uint32_t aEndPoint,
+                              nsIAccessibleTextRange* aOtherRange,
+                              uint32_t aOtherRangeEndPoint,
+                              int32_t* aResult) final;
+  NS_IMETHOD GetText(nsAString& aText) final;
+  NS_IMETHOD GetBounds(nsIArray** aRectList) final;
+  NS_IMETHOD Move(uint32_t aUnit, int32_t aCount) final;
+  NS_IMETHOD MoveStart(uint32_t aUnit, int32_t aCount) final;
+  NS_IMETHOD MoveEnd(uint32_t aUnit, int32_t aCount) final;
+  NS_IMETHOD Normalize(uint32_t aUnit) final;
+  NS_IMETHOD Crop(nsIAccessible* aContainer, bool* aSuccess) final;
+  NS_IMETHOD FindText(const nsAString& aText, bool aIsBackward,
+                      bool aIsIgnoreCase,
+                      nsIAccessibleTextRange** aRange) final;
+  NS_IMETHOD FindAttr(uint32_t aAttr, nsIVariant* aVal, bool aIsBackward,
+                      nsIAccessibleTextRange** aRange) final;
+  NS_IMETHOD AddToSelection() final;
+  NS_IMETHOD RemoveFromSelection() final;
+  NS_IMETHOD Select() final;
+  NS_IMETHOD ScrollIntoView(uint32_t aHow) final;
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ACCESSIBLETEXTRANGE_IMPL_IID)
+
+ private:
+  xpcAccessibleTextRange() {}
+
+  ~xpcAccessibleTextRange() {}
+
+  friend class xpcAccessibleHyperText;
+
+  xpcAccessibleTextRange(const xpcAccessibleTextRange&) = delete;
+  xpcAccessibleTextRange& operator=(const xpcAccessibleTextRange&) = delete;
+
+  TextRange mRange;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(xpcAccessibleTextRange,
+                              NS_ACCESSIBLETEXTRANGE_IMPL_IID)
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/xpcom/xpcAccessibleValue.cpp b/accessible/xpcom/xpcAccessibleValue.cpp
new file mode 100644
index 0000000000..93ed32e2b3
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleValue.cpp
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpcAccessibleGeneric.h"
+#include "Accessible.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+NS_IMETHODIMP
+xpcAccessibleValue::GetMaximumValue(double* aValue) {
+  NS_ENSURE_ARG_POINTER(aValue);
+  *aValue = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible() && Intl().AsAccessible()->IsDefunct())
+    return NS_ERROR_FAILURE;
+
+  double value;
+  if (Intl().IsAccessible()) {
+    value = Intl().AsAccessible()->MaxValue();
+  } else {
+    value = Intl().AsProxy()->MaxValue();
+  }
+
+  if (!IsNaN(value)) *aValue = value;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleValue::GetMinimumValue(double* aValue) {
+  NS_ENSURE_ARG_POINTER(aValue);
+  *aValue = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible() && Intl().AsAccessible()->IsDefunct())
+    return NS_ERROR_FAILURE;
+
+  double value;
+  if (Intl().IsAccessible()) {
+    value = Intl().AsAccessible()->MinValue();
+  } else {
+    value = Intl().AsProxy()->MinValue();
+  }
+
+  if (!IsNaN(value)) *aValue = value;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleValue::GetCurrentValue(double* aValue) {
+  NS_ENSURE_ARG_POINTER(aValue);
+  *aValue = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible() && Intl().AsAccessible()->IsDefunct())
+    return NS_ERROR_FAILURE;
+
+  double value;
+  if (Intl().IsAccessible()) {
+    value = Intl().AsAccessible()->CurValue();
+  } else {
+    value = Intl().AsProxy()->CurValue();
+  }
+
+  if (!IsNaN(value)) *aValue = value;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleValue::SetCurrentValue(double aValue) {
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible() && Intl().AsAccessible()->IsDefunct())
+    return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible()) {
+    Intl().AsAccessible()->SetCurValue(aValue);
+  } else {
+    Intl().AsProxy()->SetCurValue(aValue);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleValue::GetMinimumIncrement(double* aValue) {
+  NS_ENSURE_ARG_POINTER(aValue);
+  *aValue = 0;
+
+  if (Intl().IsNull()) return NS_ERROR_FAILURE;
+
+  if (Intl().IsAccessible() && Intl().AsAccessible()->IsDefunct())
+    return NS_ERROR_FAILURE;
+
+  double value;
+  if (Intl().IsAccessible()) {
+    value = Intl().AsAccessible()->Step();
+  } else {
+    value = Intl().AsProxy()->Step();
+  }
+
+  if (!IsNaN(value)) *aValue = value;
+
+  return NS_OK;
+}
diff --git a/accessible/xpcom/xpcAccessibleValue.h b/accessible/xpcom/xpcAccessibleValue.h
new file mode 100644
index 0000000000..74586cd72b
--- /dev/null
+++ b/accessible/xpcom/xpcAccessibleValue.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_xpcAccessibleValue_h_
+#define mozilla_a11y_xpcAccessibleValue_h_
+
+#include "nsIAccessibleValue.h"
+
+namespace mozilla {
+namespace a11y {
+
+class Accessible;
+
+/**
+ * XPCOM nsIAccessibleValue interface implementation, used by
+ * xpcAccessibleGeneric class.
+ */
+class xpcAccessibleValue : public nsIAccessibleValue {
+ public:
+  NS_IMETHOD GetMaximumValue(double* aValue) final;
+  NS_IMETHOD GetMinimumValue(double* aValue) final;
+  NS_IMETHOD GetCurrentValue(double* aValue) final;
+  NS_IMETHOD SetCurrentValue(double aValue) final;
+  NS_IMETHOD GetMinimumIncrement(double* aMinIncrement) final;
+
+ protected:
+  xpcAccessibleValue() {}
+  virtual ~xpcAccessibleValue() {}
+
+ private:
+  AccessibleOrProxy Intl();
+
+  xpcAccessibleValue(const xpcAccessibleValue&) = delete;
+  xpcAccessibleValue& operator=(const xpcAccessibleValue&) = delete;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+#endif