Adding upstream version 86.0.1.upstream/86.0.1upstream

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

25 files changed, 3835 insertions, 0 deletions

diff --git a/accessible/windows/ia2/ia2Accessible.cpp b/accessible/windows/ia2/ia2Accessible.cpp
new file mode 100644
index 0000000000..b042e41913
--- /dev/null
+++ b/accessible/windows/ia2/ia2Accessible.cpp
@@ -0,0 +1,632 @@
+/* -*- 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 "AccessibleWrap.h"
+
+#include "Accessible2_i.c"
+#include "Accessible2_2_i.c"
+#include "Accessible2_3_i.c"
+#include "AccessibleRole.h"
+#include "AccessibleStates.h"
+
+#include "Compatibility.h"
+#include "ia2AccessibleRelation.h"
+#include "IUnknownImpl.h"
+#include "nsCoreUtils.h"
+#include "nsIAccessibleTypes.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "Relation.h"
+#include "TextRange-inl.h"
+#include "nsAccessibilityService.h"
+
+#include "mozilla/PresShell.h"
+#include "nsIPersistentProperties2.h"
+#include "nsISimpleEnumerator.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+template <typename String>
+static void EscapeAttributeChars(String& aStr);
+
+////////////////////////////////////////////////////////////////////////////////
+// ia2Accessible
+////////////////////////////////////////////////////////////////////////////////
+
+STDMETHODIMP
+ia2Accessible::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  // NOTE: If any new versions of IAccessible2 are added here, they should
+  // also be added to the IA2 Handler in
+  // /accessible/ipc/win/handler/AccessibleHandler.cpp
+
+  if (IID_IAccessible2_3 == iid)
+    *ppv = static_cast<IAccessible2_3*>(this);
+  else if (IID_IAccessible2_2 == iid)
+    *ppv = static_cast<IAccessible2_2*>(this);
+  else if (IID_IAccessible2 == iid)
+    *ppv = static_cast<IAccessible2*>(this);
+
+  if (*ppv) {
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessible2
+
+STDMETHODIMP
+ia2Accessible::get_nRelations(long* aNRelations) {
+  if (!aNRelations) return E_INVALIDARG;
+  *aNRelations = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL) continue;
+
+    Relation rel = acc->RelationByType(sRelationTypePairs[idx].first);
+    if (rel.Next()) (*aNRelations)++;
+  }
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_relation(long aRelationIndex,
+                            IAccessibleRelation** aRelation) {
+  if (!aRelation || aRelationIndex < 0) return E_INVALIDARG;
+  *aRelation = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  long relIdx = 0;
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL) continue;
+
+    RelationType relationType = sRelationTypePairs[idx].first;
+    Relation rel = acc->RelationByType(relationType);
+    RefPtr<ia2AccessibleRelation> ia2Relation =
+        new ia2AccessibleRelation(relationType, &rel);
+    if (ia2Relation->HasTargets()) {
+      if (relIdx == aRelationIndex) {
+        acc->AssociateCOMObjectForDisconnection(ia2Relation);
+        ia2Relation.forget(aRelation);
+        return S_OK;
+      }
+
+      relIdx++;
+    }
+  }
+
+  return E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2Accessible::get_relations(long aMaxRelations,
+                             IAccessibleRelation** aRelation,
+                             long* aNRelations) {
+  if (!aRelation || !aNRelations || aMaxRelations <= 0) return E_INVALIDARG;
+  *aNRelations = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  for (uint32_t idx = 0;
+       idx < ArrayLength(sRelationTypePairs) && *aNRelations < aMaxRelations;
+       idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL) continue;
+
+    RelationType relationType = sRelationTypePairs[idx].first;
+    Relation rel = acc->RelationByType(relationType);
+    RefPtr<ia2AccessibleRelation> ia2Rel =
+        new ia2AccessibleRelation(relationType, &rel);
+    if (ia2Rel->HasTargets()) {
+      acc->AssociateCOMObjectForDisconnection(ia2Rel);
+      ia2Rel.forget(aRelation + (*aNRelations));
+      (*aNRelations)++;
+    }
+  }
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::role(long* aRole) {
+  if (!aRole) return E_INVALIDARG;
+  *aRole = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+#define ROLE(_geckoRole, stringRole, atkRole, macRole, macSubrole, msaaRole, \
+             ia2Role, androidClass, nameRule)                                \
+  case roles::_geckoRole:                                                    \
+    *aRole = ia2Role;                                                        \
+    break;
+
+  a11y::role geckoRole;
+  MOZ_ASSERT(!acc->IsProxy());
+  geckoRole = acc->Role();
+  switch (geckoRole) {
+#include "RoleMap.h"
+    default:
+      MOZ_CRASH("Unknown role.");
+  }
+
+#undef ROLE
+
+  // Special case, if there is a ROLE_ROW inside of a ROLE_TREE_TABLE, then call
+  // the IA2 role a ROLE_OUTLINEITEM.
+  MOZ_ASSERT(!acc->IsProxy());
+  if (geckoRole == roles::ROW) {
+    Accessible* xpParent = acc->Parent();
+    if (xpParent && xpParent->Role() == roles::TREE_TABLE)
+      *aRole = ROLE_SYSTEM_OUTLINEITEM;
+  }
+
+  return S_OK;
+}
+
+// XXX Use MOZ_CAN_RUN_SCRIPT_BOUNDARY for now due to bug 1543294.
+MOZ_CAN_RUN_SCRIPT_BOUNDARY STDMETHODIMP
+ia2Accessible::scrollTo(enum IA2ScrollType aScrollType) {
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  RefPtr<PresShell> presShell = acc->Document()->PresShellPtr();
+  nsCOMPtr<nsIContent> content = acc->GetContent();
+  nsCoreUtils::ScrollTo(presShell, content, aScrollType);
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::scrollToPoint(enum IA2CoordinateType aCoordType, long aX,
+                             long aY) {
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  uint32_t geckoCoordType =
+      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  acc->ScrollToPoint(geckoCoordType, aX, aY);
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_groupPosition(long* aGroupLevel, long* aSimilarItemsInGroup,
+                                 long* aPositionInGroup) {
+  if (!aGroupLevel || !aSimilarItemsInGroup || !aPositionInGroup)
+    return E_INVALIDARG;
+
+  *aGroupLevel = 0;
+  *aSimilarItemsInGroup = 0;
+  *aPositionInGroup = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  GroupPos groupPos = acc->GroupPosition();
+
+  // Group information for accessibles having level only (like html headings
+  // elements) isn't exposed by this method. AT should look for 'level' object
+  // attribute.
+  if (!groupPos.setSize && !groupPos.posInSet) return S_FALSE;
+
+  *aGroupLevel = groupPos.level;
+  *aSimilarItemsInGroup = groupPos.setSize;
+  *aPositionInGroup = groupPos.posInSet;
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_states(AccessibleStates* aStates) {
+  if (!aStates) return E_INVALIDARG;
+  *aStates = 0;
+
+  // XXX: bug 344674 should come with better approach that we have here.
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) {
+    *aStates = IA2_STATE_DEFUNCT;
+    return S_OK;
+  }
+
+  uint64_t state;
+  MOZ_ASSERT(!acc->IsProxy());
+  state = acc->State();
+
+  if (state & states::INVALID) *aStates |= IA2_STATE_INVALID_ENTRY;
+  if (state & states::REQUIRED) *aStates |= IA2_STATE_REQUIRED;
+
+  // The following IA2 states are not supported by Gecko
+  // IA2_STATE_ARMED
+  // IA2_STATE_MANAGES_DESCENDANTS
+  // IA2_STATE_ICONIFIED
+  // IA2_STATE_INVALID // This is not a state, it is the absence of a state
+
+  if (state & states::ACTIVE) *aStates |= IA2_STATE_ACTIVE;
+  if (state & states::DEFUNCT) *aStates |= IA2_STATE_DEFUNCT;
+  if (state & states::EDITABLE) *aStates |= IA2_STATE_EDITABLE;
+  if (state & states::HORIZONTAL) *aStates |= IA2_STATE_HORIZONTAL;
+  if (state & states::MODAL) *aStates |= IA2_STATE_MODAL;
+  if (state & states::MULTI_LINE) *aStates |= IA2_STATE_MULTI_LINE;
+  if (state & states::OPAQUE1) *aStates |= IA2_STATE_OPAQUE;
+  if (state & states::SELECTABLE_TEXT) *aStates |= IA2_STATE_SELECTABLE_TEXT;
+  if (state & states::SINGLE_LINE) *aStates |= IA2_STATE_SINGLE_LINE;
+  if (state & states::STALE) *aStates |= IA2_STATE_STALE;
+  if (state & states::SUPPORTS_AUTOCOMPLETION)
+    *aStates |= IA2_STATE_SUPPORTS_AUTOCOMPLETION;
+  if (state & states::TRANSIENT) *aStates |= IA2_STATE_TRANSIENT;
+  if (state & states::VERTICAL) *aStates |= IA2_STATE_VERTICAL;
+  if (state & states::CHECKED) *aStates |= IA2_STATE_CHECKABLE;
+  if (state & states::PINNED) *aStates |= IA2_STATE_PINNED;
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_extendedRole(BSTR* aExtendedRole) {
+  if (!aExtendedRole) return E_INVALIDARG;
+
+  *aExtendedRole = nullptr;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_localizedExtendedRole(BSTR* aLocalizedExtendedRole) {
+  if (!aLocalizedExtendedRole) return E_INVALIDARG;
+
+  *aLocalizedExtendedRole = nullptr;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_nExtendedStates(long* aNExtendedStates) {
+  if (!aNExtendedStates) return E_INVALIDARG;
+
+  *aNExtendedStates = 0;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_extendedStates(long aMaxExtendedStates,
+                                  BSTR** aExtendedStates,
+                                  long* aNExtendedStates) {
+  if (!aExtendedStates || !aNExtendedStates) return E_INVALIDARG;
+
+  *aExtendedStates = nullptr;
+  *aNExtendedStates = 0;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_localizedExtendedStates(long aMaxLocalizedExtendedStates,
+                                           BSTR** aLocalizedExtendedStates,
+                                           long* aNLocalizedExtendedStates) {
+  if (!aLocalizedExtendedStates || !aNLocalizedExtendedStates)
+    return E_INVALIDARG;
+
+  *aLocalizedExtendedStates = nullptr;
+  *aNLocalizedExtendedStates = 0;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_uniqueID(long* aUniqueID) {
+  if (!aUniqueID) return E_INVALIDARG;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  *aUniqueID = AccessibleWrap::GetChildIDFor(acc);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_windowHandle(HWND* aWindowHandle) {
+  if (!aWindowHandle) return E_INVALIDARG;
+  *aWindowHandle = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  *aWindowHandle = AccessibleWrap::GetHWNDFor(acc);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_indexInParent(long* aIndexInParent) {
+  if (!aIndexInParent) return E_INVALIDARG;
+  *aIndexInParent = -1;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  *aIndexInParent = acc->IndexInParent();
+
+  if (*aIndexInParent == -1) return S_FALSE;
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_locale(IA2Locale* aLocale) {
+  if (!aLocale) return E_INVALIDARG;
+
+  // Language codes consist of a primary code and a possibly empty series of
+  // subcodes: language-code = primary-code ( "-" subcode )*
+  // Two-letter primary codes are reserved for [ISO639] language abbreviations.
+  // Any two-letter subcode is understood to be a [ISO3166] country code.
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString lang;
+  acc->Language(lang);
+
+  // If primary code consists from two letters then expose it as language.
+  int32_t offset = lang.FindChar('-', 0);
+  if (offset == -1) {
+    if (lang.Length() == 2) {
+      aLocale->language = ::SysAllocString(lang.get());
+      return S_OK;
+    }
+  } else if (offset == 2) {
+    aLocale->language = ::SysAllocStringLen(lang.get(), 2);
+
+    // If the first subcode consists from two letters then expose it as
+    // country.
+    offset = lang.FindChar('-', 3);
+    if (offset == -1) {
+      if (lang.Length() == 5) {
+        aLocale->country = ::SysAllocString(lang.get() + 3);
+        return S_OK;
+      }
+    } else if (offset == 5) {
+      aLocale->country = ::SysAllocStringLen(lang.get() + 3, 2);
+    }
+  }
+
+  // Expose as a string if primary code or subcode cannot point to language or
+  // country abbreviations or if there are more than one subcode.
+  aLocale->variant = ::SysAllocString(lang.get());
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_attributes(BSTR* aAttributes) {
+  if (!aAttributes) return E_INVALIDARG;
+  *aAttributes = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  // The format is name:value;name:value; with \ for escaping these
+  // characters ":;=,\".
+  if (!acc->IsProxy()) {
+    nsCOMPtr<nsIPersistentProperties> attributes = acc->Attributes();
+    return ConvertToIA2Attributes(attributes, aAttributes);
+  }
+
+  MOZ_ASSERT(!acc->IsProxy());
+  return E_UNEXPECTED;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessible2_2
+
+STDMETHODIMP
+ia2Accessible::get_attribute(BSTR name, VARIANT* aAttribute) {
+  if (!aAttribute) return E_INVALIDARG;
+
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2Accessible::get_accessibleWithCaret(IUnknown** aAccessible,
+                                       long* aCaretOffset) {
+  if (!aAccessible || !aCaretOffset) return E_INVALIDARG;
+
+  *aAccessible = nullptr;
+  *aCaretOffset = -1;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  int32_t caretOffset = -1;
+  Accessible* accWithCaret = SelectionMgr()->AccessibleWithCaret(&caretOffset);
+  if (!accWithCaret || acc->Document() != accWithCaret->Document())
+    return S_FALSE;
+
+  Accessible* child = accWithCaret;
+  while (!child->IsDoc() && child != acc) child = child->Parent();
+
+  if (child != acc) return S_FALSE;
+
+  *aAccessible =
+      static_cast<IAccessible2*>(static_cast<AccessibleWrap*>(accWithCaret));
+  (*aAccessible)->AddRef();
+  *aCaretOffset = caretOffset;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_relationTargetsOfType(BSTR aType, long aMaxTargets,
+                                         IUnknown*** aTargets,
+                                         long* aNTargets) {
+  if (!aTargets || !aNTargets || aMaxTargets < 0) return E_INVALIDARG;
+  *aNTargets = 0;
+
+  Maybe<RelationType> relationType;
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (wcscmp(aType, sRelationTypePairs[idx].second) == 0) {
+      relationType.emplace(sRelationTypePairs[idx].first);
+      break;
+    }
+  }
+  if (!relationType) return E_INVALIDARG;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsTArray<Accessible*> targets;
+  MOZ_ASSERT(!acc->IsProxy());
+  Relation rel = acc->RelationByType(*relationType);
+  Accessible* target = nullptr;
+  while (
+      (target = rel.Next()) &&
+      (aMaxTargets == 0 || static_cast<long>(targets.Length()) < aMaxTargets)) {
+    targets.AppendElement(target);
+  }
+
+  *aNTargets = targets.Length();
+  *aTargets =
+      static_cast<IUnknown**>(::CoTaskMemAlloc(sizeof(IUnknown*) * *aNTargets));
+  if (!*aTargets) return E_OUTOFMEMORY;
+
+  for (int32_t i = 0; i < *aNTargets; i++) {
+    AccessibleWrap* target = static_cast<AccessibleWrap*>(targets[i]);
+    (*aTargets)[i] = static_cast<IAccessible2*>(target);
+    (*aTargets)[i]->AddRef();
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2Accessible::get_selectionRanges(IA2Range** aRanges, long* aNRanges) {
+  if (!aRanges || !aNRanges) return E_INVALIDARG;
+
+  *aNRanges = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<TextRange, 1> ranges;
+  acc->Document()->SelectionRanges(&ranges);
+  ranges.RemoveElementsBy([acc](auto& range) { return !range.Crop(acc); });
+
+  *aNRanges = ranges.Length();
+  *aRanges =
+      static_cast<IA2Range*>(::CoTaskMemAlloc(sizeof(IA2Range) * *aNRanges));
+  if (!*aRanges) return E_OUTOFMEMORY;
+
+  for (uint32_t idx = 0; idx < static_cast<uint32_t>(*aNRanges); idx++) {
+    AccessibleWrap* anchor =
+        static_cast<AccessibleWrap*>(ranges[idx].StartContainer());
+    (*aRanges)[idx].anchor = static_cast<IAccessible2*>(anchor);
+    anchor->AddRef();
+
+    (*aRanges)[idx].anchorOffset = ranges[idx].StartOffset();
+
+    AccessibleWrap* active =
+        static_cast<AccessibleWrap*>(ranges[idx].EndContainer());
+    (*aRanges)[idx].active = static_cast<IAccessible2*>(active);
+    active->AddRef();
+
+    (*aRanges)[idx].activeOffset = ranges[idx].EndOffset();
+  }
+
+  return S_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Helpers
+
+template <typename String>
+static inline void EscapeAttributeChars(String& aStr) {
+  int32_t offset = 0;
+  static const char kCharsToEscape[] = ":;=,\\";
+  while ((offset = aStr.FindCharInSet(kCharsToEscape, offset)) != kNotFound) {
+    aStr.Insert('\\', offset);
+    offset += 2;
+  }
+}
+
+HRESULT
+ia2Accessible::ConvertToIA2Attributes(nsTArray<Attribute>* aAttributes,
+                                      BSTR* aIA2Attributes) {
+  nsString attrStr;
+  size_t attrCount = aAttributes->Length();
+  for (size_t i = 0; i < attrCount; i++) {
+    EscapeAttributeChars(aAttributes->ElementAt(i).Name());
+    EscapeAttributeChars(aAttributes->ElementAt(i).Value());
+    AppendUTF8toUTF16(aAttributes->ElementAt(i).Name(), attrStr);
+    attrStr.Append(':');
+    attrStr.Append(aAttributes->ElementAt(i).Value());
+    attrStr.Append(';');
+  }
+
+  if (attrStr.IsEmpty()) return S_FALSE;
+
+  *aIA2Attributes = ::SysAllocStringLen(attrStr.get(), attrStr.Length());
+  return *aIA2Attributes ? S_OK : E_OUTOFMEMORY;
+}
+
+HRESULT
+ia2Accessible::ConvertToIA2Attributes(nsIPersistentProperties* aAttributes,
+                                      BSTR* aIA2Attributes) {
+  *aIA2Attributes = nullptr;
+
+  // The format is name:value;name:value; with \ for escaping these
+  // characters ":;=,\".
+
+  if (!aAttributes) return S_FALSE;
+
+  nsCOMPtr<nsISimpleEnumerator> propEnum;
+  aAttributes->Enumerate(getter_AddRefs(propEnum));
+  if (!propEnum) return E_FAIL;
+
+  nsAutoString strAttrs;
+
+  bool hasMore = false;
+  while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
+    nsCOMPtr<nsISupports> propSupports;
+    propEnum->GetNext(getter_AddRefs(propSupports));
+
+    nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(propSupports));
+    if (!propElem) return E_FAIL;
+
+    nsAutoCString name;
+    if (NS_FAILED(propElem->GetKey(name))) return E_FAIL;
+
+    EscapeAttributeChars(name);
+
+    nsAutoString value;
+    if (NS_FAILED(propElem->GetValue(value))) return E_FAIL;
+
+    EscapeAttributeChars(value);
+
+    AppendUTF8toUTF16(name, strAttrs);
+    strAttrs.Append(':');
+    strAttrs.Append(value);
+    strAttrs.Append(';');
+  }
+
+  if (strAttrs.IsEmpty()) return S_FALSE;
+
+  *aIA2Attributes = ::SysAllocStringLen(strAttrs.get(), strAttrs.Length());
+  return *aIA2Attributes ? S_OK : E_OUTOFMEMORY;
+}
diff --git a/accessible/windows/ia2/ia2Accessible.h b/accessible/windows/ia2/ia2Accessible.h
new file mode 100644
index 0000000000..3a8afe46b4
--- /dev/null
+++ b/accessible/windows/ia2/ia2Accessible.h
@@ -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/. */
+
+#ifndef mozilla_a11y_ia2Accessible_h_
+#define mozilla_a11y_ia2Accessible_h_
+
+#include "nsISupports.h"
+
+#include "Accessible2_3.h"
+
+namespace mozilla {
+namespace a11y {
+class Attribute;
+
+class ia2Accessible : public IAccessible2_3 {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessible2
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nRelations(
+      /* [retval][out] */ long* nRelations);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relation(
+      /* [in] */ long relationIndex,
+      /* [retval][out] */ IAccessibleRelation** relation);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relations(
+      /* [in] */ long maxRelations,
+      /* [length_is][size_is][out] */ IAccessibleRelation** relation,
+      /* [retval][out] */ long* nRelations);
+
+  virtual HRESULT STDMETHODCALLTYPE role(
+      /* [retval][out] */ long* role);
+
+  virtual HRESULT STDMETHODCALLTYPE scrollTo(
+      /* [in] */ enum IA2ScrollType scrollType);
+
+  virtual HRESULT STDMETHODCALLTYPE scrollToPoint(
+      /* [in] */ enum IA2CoordinateType coordinateType,
+      /* [in] */ long x,
+      /* [in] */ long y);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_groupPosition(
+      /* [out] */ long* groupLevel,
+      /* [out] */ long* similarItemsInGroup,
+      /* [retval][out] */ long* positionInGroup);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_states(
+      /* [retval][out] */ AccessibleStates* states);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_extendedRole(
+      /* [retval][out] */ BSTR* extendedRole);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedExtendedRole(
+      /* [retval][out] */ BSTR* localizedExtendedRole);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nExtendedStates(
+      /* [retval][out] */ long* nExtendedStates);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_extendedStates(
+      /* [in] */ long maxExtendedStates,
+      /* [length_is][length_is][size_is][size_is][out] */ BSTR** extendedStates,
+      /* [retval][out] */ long* nExtendedStates);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedExtendedStates(
+      /* [in] */ long maxLocalizedExtendedStates,
+      /* [length_is][length_is][size_is][size_is][out] */
+      BSTR** localizedExtendedStates,
+      /* [retval][out] */ long* nLocalizedExtendedStates);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_uniqueID(
+      /* [retval][out] */ long* uniqueID);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_windowHandle(
+      /* [retval][out] */ HWND* windowHandle);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_indexInParent(
+      /* [retval][out] */ long* indexInParent);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_locale(
+      /* [retval][out] */ IA2Locale* locale);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_attributes(
+      /* [retval][out] */ BSTR* attributes);
+
+  // IAccessible2_2
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_attribute(
+      /* [in] */ BSTR name,
+      /* [out, retval] */ VARIANT* attribute);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_accessibleWithCaret(
+      /* [out] */ IUnknown** accessible,
+      /* [out, retval] */ long* caretOffset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relationTargetsOfType(
+      /* [in] */ BSTR type,
+      /* [in] */ long maxTargets,
+      /* [out, size_is(,*nTargets)] */ IUnknown*** targets,
+      /* [out, retval] */ long* nTargets);
+
+  // IAccessible2_3
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectionRanges(
+      /* [out, size_is(,*nRanges)] */ IA2Range** ranges,
+      /* [out, retval] */ long* nRanges);
+
+  // Helper method
+  static HRESULT ConvertToIA2Attributes(nsIPersistentProperties* aAttributes,
+                                        BSTR* aIA2Attributes);
+  static HRESULT ConvertToIA2Attributes(nsTArray<Attribute>* aAttributes,
+                                        BSTR* aIA2Attributes);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleAction.cpp b/accessible/windows/ia2/ia2AccessibleAction.cpp
new file mode 100644
index 0000000000..4671a48256
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleAction.cpp
@@ -0,0 +1,138 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleAction.h"
+
+#include "AccessibleAction_i.c"
+
+#include "AccessibleWrap.h"
+#include "IUnknownImpl.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleAction::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleAction == iid &&
+      !static_cast<AccessibleWrap*>(this)->IsProxy()) {
+    *ppv = static_cast<IAccessibleAction*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+// IAccessibleAction
+
+STDMETHODIMP
+ia2AccessibleAction::nActions(long* aActionCount) {
+  if (!aActionCount) return E_INVALIDARG;
+
+  *aActionCount = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  *aActionCount = acc->ActionCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleAction::doAction(long aActionIndex) {
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  uint8_t index = static_cast<uint8_t>(aActionIndex);
+  return acc->DoAction(index) ? S_OK : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleAction::get_description(long aActionIndex, BSTR* aDescription) {
+  if (!aDescription) return E_INVALIDARG;
+  *aDescription = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString description;
+  uint8_t index = static_cast<uint8_t>(aActionIndex);
+  acc->ActionDescriptionAt(index, description);
+  if (description.IsEmpty()) return S_FALSE;
+
+  *aDescription = ::SysAllocStringLen(description.get(), description.Length());
+  return *aDescription ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleAction::get_keyBinding(long aActionIndex, long aNumMaxBinding,
+                                    BSTR** aKeyBinding, long* aNumBinding) {
+  if (!aKeyBinding) return E_INVALIDARG;
+  *aKeyBinding = nullptr;
+
+  if (!aNumBinding) return E_INVALIDARG;
+  *aNumBinding = 0;
+
+  if (aActionIndex != 0 || aNumMaxBinding < 1) return E_INVALIDARG;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  // Expose keyboard shortcut if it's not exposed via MSAA keyboard shortcut.
+  KeyBinding keyBinding = acc->AccessKey();
+  if (keyBinding.IsEmpty()) return S_FALSE;
+
+  keyBinding = acc->KeyboardShortcut();
+  if (keyBinding.IsEmpty()) return S_FALSE;
+
+  nsAutoString keyStr;
+  keyBinding.ToString(keyStr);
+
+  *aKeyBinding = static_cast<BSTR*>(::CoTaskMemAlloc(sizeof(BSTR*)));
+  if (!*aKeyBinding) return E_OUTOFMEMORY;
+
+  *(aKeyBinding[0]) = ::SysAllocStringLen(keyStr.get(), keyStr.Length());
+  if (!*(aKeyBinding[0])) {
+    ::CoTaskMemFree(*aKeyBinding);
+    return E_OUTOFMEMORY;
+  }
+
+  *aNumBinding = 1;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleAction::get_name(long aActionIndex, BSTR* aName) {
+  if (!aName) return E_INVALIDARG;
+
+  *aName = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString name;
+  uint8_t index = static_cast<uint8_t>(aActionIndex);
+  acc->ActionNameAt(index, name);
+  if (name.IsEmpty()) return E_INVALIDARG;
+
+  *aName = ::SysAllocStringLen(name.get(), name.Length());
+  return *aName ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleAction::get_localizedName(long aActionIndex,
+                                       BSTR* aLocalizedName) {
+  if (!aLocalizedName) return E_INVALIDARG;
+
+  *aLocalizedName = nullptr;
+  return E_NOTIMPL;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleAction.h b/accessible/windows/ia2/ia2AccessibleAction.h
new file mode 100644
index 0000000000..e85c345844
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleAction.h
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_ACTION_H
+#define _ACCESSIBLE_ACTION_H
+
+#include "nsISupports.h"
+
+#include "AccessibleAction.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleAction : public IAccessibleAction {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleAction
+  virtual HRESULT STDMETHODCALLTYPE nActions(
+      /* [retval][out] */ long* nActions);
+
+  virtual HRESULT STDMETHODCALLTYPE doAction(
+      /* [in] */ long actionIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_description(
+      /* [in] */ long actionIndex,
+      /* [retval][out] */ BSTR* description);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_keyBinding(
+      /* [in] */ long actionIndex,
+      /* [in] */ long nMaxBinding,
+      /* [length_is][length_is][size_is][size_is][out] */ BSTR** keyBinding,
+      /* [retval][out] */ long* nBinding);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_name(
+      /* [in] */ long actionIndex,
+      /* [retval][out] */ BSTR* name);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedName(
+      /* [in] */ long actionIndex,
+      /* [retval][out] */ BSTR* localizedName);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#define FORWARD_IACCESSIBLEACTION(Class)                                       \
+  virtual HRESULT STDMETHODCALLTYPE nActions(long* nActions) {                 \
+    return Class::nActions(nActions);                                          \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE doAction(long actionIndex) {               \
+    return Class::doAction(actionIndex);                                       \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_description(long actionIndex,          \
+                                                    BSTR* description) {       \
+    return Class::get_description(actionIndex, description);                   \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_keyBinding(                            \
+      long actionIndex, long nMaxBinding, BSTR** keyBinding, long* nBinding) { \
+    return Class::get_keyBinding(actionIndex, nMaxBinding, keyBinding,         \
+                                 nBinding);                                    \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_name(long actionIndex, BSTR* name) {   \
+    return Class::get_name(actionIndex, name);                                 \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_localizedName(long actionIndex,        \
+                                                      BSTR* localizedName) {   \
+    return Class::get_localizedName(actionIndex, localizedName);               \
+  }
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleComponent.cpp b/accessible/windows/ia2/ia2AccessibleComponent.cpp
new file mode 100644
index 0000000000..9e6996cc12
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleComponent.cpp
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleComponent.h"
+
+#include "AccessibleComponent_i.c"
+
+#include "AccessibleWrap.h"
+#include "States.h"
+#include "IUnknownImpl.h"
+
+#include "nsIFrame.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleComponent::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleComponent == iid) {
+    *ppv = static_cast<IAccessibleComponent*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+// IAccessibleComponent
+
+STDMETHODIMP
+ia2AccessibleComponent::get_locationInParent(long* aX, long* aY) {
+  if (!aX || !aY) return E_INVALIDARG;
+
+  *aX = 0;
+  *aY = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  // If the object is not on any screen the returned position is (0,0).
+  uint64_t state = acc->State();
+  if (state & states::INVISIBLE) return S_OK;
+
+  nsIntRect rect = acc->Bounds();
+
+  // The coordinates of the returned position are relative to this object's
+  // parent or relative to the screen on which this object is rendered if it
+  // has no parent.
+  if (!acc->Parent()) {
+    *aX = rect.X();
+    *aY = rect.Y();
+    return S_OK;
+  }
+
+  // The coordinates of the bounding box are given relative to the parent's
+  // coordinate system.
+  nsIntRect parentRect = acc->Parent()->Bounds();
+  *aX = rect.X() - parentRect.X();
+  *aY = rect.Y() - parentRect.Y();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleComponent::get_foreground(IA2Color* aForeground) {
+  if (!aForeground) return E_INVALIDARG;
+
+  *aForeground = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame* frame = acc->GetFrame();
+  if (frame) *aForeground = frame->StyleText()->mColor.ToColor();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleComponent::get_background(IA2Color* aBackground) {
+  if (!aBackground) return E_INVALIDARG;
+
+  *aBackground = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame* frame = acc->GetFrame();
+  if (frame) {
+    *aBackground = frame->StyleBackground()->BackgroundColor(frame);
+  }
+
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleComponent.h b/accessible/windows/ia2/ia2AccessibleComponent.h
new file mode 100644
index 0000000000..54e87d1963
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleComponent.h
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 IA2_ACCESSIBLE_COMPONENT_H_
+#define IA2_ACCESSIBLE_COMPONENT_H_
+
+#include "AccessibleComponent.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleComponent : public IAccessibleComponent {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleComponent
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_locationInParent(
+      /* [out] */ long* x,
+      /* [retval][out] */ long* y);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_foreground(
+      /* [retval][out] */ IA2Color* foreground);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_background(
+      /* [retval][out] */ IA2Color* background);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleEditableText.cpp b/accessible/windows/ia2/ia2AccessibleEditableText.cpp
new file mode 100644
index 0000000000..06c1dc1530
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleEditableText.cpp
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleEditableText.h"
+
+#include "AccessibleEditableText_i.c"
+#include "HyperTextAccessible-inl.h"
+#include "HyperTextAccessibleWrap.h"
+#include "ProxyWrappers.h"
+
+#include "nsCOMPtr.h"
+#include "nsString.h"
+
+using namespace mozilla::a11y;
+
+// IAccessibleEditableText
+
+STDMETHODIMP
+ia2AccessibleEditableText::copyText(long aStartOffset, long aEndOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) return E_INVALIDARG;
+
+  textAcc->CopyText(aStartOffset, aEndOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::deleteText(long aStartOffset, long aEndOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) return E_INVALIDARG;
+
+  textAcc->DeleteText(aStartOffset, aEndOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::insertText(long aOffset, BSTR* aText) {
+  uint32_t length = ::SysStringLen(*aText);
+  nsAutoString text(*aText, length);
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  textAcc->InsertText(text, aOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::cutText(long aStartOffset, long aEndOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) return E_INVALIDARG;
+
+  textAcc->CutText(aStartOffset, aEndOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::pasteText(long aOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  RefPtr<HyperTextAccessible> textAcc =
+      static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  textAcc->PasteText(aOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::replaceText(long aStartOffset, long aEndOffset,
+                                       BSTR* aText) {
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) return E_INVALIDARG;
+
+  textAcc->DeleteText(aStartOffset, aEndOffset);
+
+  uint32_t length = ::SysStringLen(*aText);
+  nsAutoString text(*aText, length);
+  textAcc->InsertText(text, aStartOffset);
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleEditableText::setAttributes(long aStartOffset, long aEndOffset,
+                                         BSTR* aAttributes) {
+  return E_NOTIMPL;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleEditableText.h b/accessible/windows/ia2/ia2AccessibleEditableText.h
new file mode 100644
index 0000000000..7c6470773d
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleEditableText.h
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_EDITABLETEXT_H
+#define _ACCESSIBLE_EDITABLETEXT_H
+
+#include "nsISupports.h"
+
+#include "AccessibleEditableText.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleEditableText : public IAccessibleEditableText {
+ public:
+  // IAccessibleEditableText
+  virtual HRESULT STDMETHODCALLTYPE copyText(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset);
+
+  virtual HRESULT STDMETHODCALLTYPE deleteText(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset);
+
+  virtual HRESULT STDMETHODCALLTYPE insertText(
+      /* [in] */ long offset,
+      /* [in] */ BSTR* text);
+
+  virtual HRESULT STDMETHODCALLTYPE cutText(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset);
+
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  virtual HRESULT STDMETHODCALLTYPE pasteText(
+      /* [in] */ long offset);
+
+  virtual HRESULT STDMETHODCALLTYPE replaceText(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset,
+      /* [in] */ BSTR* text);
+
+  virtual HRESULT STDMETHODCALLTYPE setAttributes(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset,
+      /* [in] */ BSTR* attributes);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleHyperlink.cpp b/accessible/windows/ia2/ia2AccessibleHyperlink.cpp
new file mode 100644
index 0000000000..2943b3e530
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleHyperlink.cpp
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "AccessibleHyperlink.h"
+#include "AccessibleHyperlink_i.c"
+
+#include "AccessibleWrap.h"
+#include "IUnknownImpl.h"
+#include "nsIURI.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleHyperlink::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleHyperlink == iid) {
+    auto accWrap = static_cast<AccessibleWrap*>(this);
+    if (accWrap->IsProxy()
+            ? !(accWrap->ProxyInterfaces() & Interfaces::HYPERLINK)
+            : !accWrap->IsLink())
+      return E_NOINTERFACE;
+
+    *ppv = static_cast<IAccessibleHyperlink*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return ia2AccessibleAction::QueryInterface(iid, ppv);
+}
+
+// IAccessibleHyperlink
+
+STDMETHODIMP
+ia2AccessibleHyperlink::get_anchor(long aIndex, VARIANT* aAnchor) {
+  if (!aAnchor) return E_INVALIDARG;
+
+  VariantInit(aAnchor);
+
+  Accessible* thisObj = static_cast<AccessibleWrap*>(this);
+  MOZ_ASSERT(!thisObj->IsProxy());
+
+  if (thisObj->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (aIndex < 0 || aIndex >= static_cast<long>(thisObj->AnchorCount()))
+    return E_INVALIDARG;
+
+  if (!thisObj->IsLink()) return S_FALSE;
+
+  AccessibleWrap* anchor =
+      static_cast<AccessibleWrap*>(thisObj->AnchorAt(aIndex));
+  if (!anchor) return S_FALSE;
+
+  void* instancePtr = nullptr;
+  HRESULT result = anchor->QueryInterface(IID_IUnknown, &instancePtr);
+  if (FAILED(result)) return result;
+
+  aAnchor->punkVal = static_cast<IUnknown*>(instancePtr);
+  aAnchor->vt = VT_UNKNOWN;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHyperlink::get_anchorTarget(long aIndex, VARIANT* aAnchorTarget) {
+  if (!aAnchorTarget) {
+    return E_INVALIDARG;
+  }
+
+  VariantInit(aAnchorTarget);
+
+  Accessible* thisObj = static_cast<AccessibleWrap*>(this);
+  nsAutoCString uriStr;
+  MOZ_ASSERT(!thisObj->IsProxy());
+  if (thisObj->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  if (aIndex < 0 || aIndex >= static_cast<long>(thisObj->AnchorCount())) {
+    return E_INVALIDARG;
+  }
+
+  if (!thisObj->IsLink()) {
+    return S_FALSE;
+  }
+
+  nsCOMPtr<nsIURI> uri = thisObj->AnchorURIAt(aIndex);
+  if (!uri) {
+    return S_FALSE;
+  }
+
+  nsresult rv = uri->GetSpec(uriStr);
+  if (NS_FAILED(rv)) {
+    return GetHRESULT(rv);
+  }
+
+  nsAutoString stringURI;
+  AppendUTF8toUTF16(uriStr, stringURI);
+
+  aAnchorTarget->vt = VT_BSTR;
+  aAnchorTarget->bstrVal =
+      ::SysAllocStringLen(stringURI.get(), stringURI.Length());
+  return aAnchorTarget->bstrVal ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleHyperlink::get_startIndex(long* aIndex) {
+  if (!aIndex) return E_INVALIDARG;
+
+  *aIndex = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  Accessible* thisObj = static_cast<AccessibleWrap*>(this);
+  if (thisObj->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!thisObj->IsLink()) return S_FALSE;
+
+  *aIndex = thisObj->StartOffset();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHyperlink::get_endIndex(long* aIndex) {
+  if (!aIndex) return E_INVALIDARG;
+
+  *aIndex = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  Accessible* thisObj = static_cast<AccessibleWrap*>(this);
+  if (thisObj->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!thisObj->IsLink()) return S_FALSE;
+
+  *aIndex = thisObj->EndOffset();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHyperlink::get_valid(boolean* aValid) {
+  if (!aValid) return E_INVALIDARG;
+
+  *aValid = false;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  Accessible* thisObj = static_cast<AccessibleWrap*>(this);
+  if (thisObj->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!thisObj->IsLink()) return S_FALSE;
+
+  *aValid = thisObj->IsLinkValid();
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleHyperlink.h b/accessible/windows/ia2/ia2AccessibleHyperlink.h
new file mode 100644
index 0000000000..c469255e1c
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleHyperlink.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_HYPERLINK_H
+#define _ACCESSIBLE_HYPERLINK_H
+
+#include "nsISupports.h"
+
+#include "ia2AccessibleAction.h"
+#include "AccessibleHyperlink.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleHyperlink : public ia2AccessibleAction,
+                               public IAccessibleHyperlink {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleAction
+  FORWARD_IACCESSIBLEACTION(ia2AccessibleAction)
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_anchor(
+      /* [in] */ long index,
+      /* [retval][out] */ VARIANT* anchor);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_anchorTarget(
+      /* [in] */ long index,
+      /* [retval][out] */ VARIANT* anchorTarget);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_startIndex(
+      /* [retval][out] */ long* index);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_endIndex(
+      /* [retval][out] */ long* index);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_valid(
+      /* [retval][out] */ boolean* valid);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleHypertext.cpp b/accessible/windows/ia2/ia2AccessibleHypertext.cpp
new file mode 100644
index 0000000000..eed2c2cdf6
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleHypertext.cpp
@@ -0,0 +1,117 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleHypertext.h"
+
+#include "AccessibleHypertext_i.c"
+
+#include "HyperTextAccessibleWrap.h"
+#include "IUnknownImpl.h"
+
+using namespace mozilla::a11y;
+
+// IAccessibleHypertext
+
+STDMETHODIMP
+ia2AccessibleHypertext::get_nHyperlinks(long* aHyperlinkCount) {
+  if (!aHyperlinkCount) return E_INVALIDARG;
+
+  *aHyperlinkCount = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessibleWrap* hyperText =
+      static_cast<HyperTextAccessibleWrap*>(this);
+  if (hyperText->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  *aHyperlinkCount = hyperText->LinkCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHypertext::get_hyperlink(long aLinkIndex,
+                                      IAccessibleHyperlink** aHyperlink) {
+  if (!aHyperlink) return E_INVALIDARG;
+
+  *aHyperlink = nullptr;
+
+  AccessibleWrap* hyperLink;
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessibleWrap* hyperText =
+      static_cast<HyperTextAccessibleWrap*>(this);
+  if (hyperText->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  hyperLink = static_cast<AccessibleWrap*>(hyperText->LinkAt(aLinkIndex));
+
+  if (!hyperLink) return E_FAIL;
+
+  *aHyperlink = static_cast<IAccessibleHyperlink*>(hyperLink);
+  (*aHyperlink)->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHypertext::get_hyperlinkIndex(long aCharIndex,
+                                           long* aHyperlinkIndex) {
+  if (!aHyperlinkIndex) return E_INVALIDARG;
+
+  *aHyperlinkIndex = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessibleWrap* hyperAcc =
+      static_cast<HyperTextAccessibleWrap*>(this);
+  if (hyperAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  *aHyperlinkIndex = hyperAcc->LinkIndexAtOffset(aCharIndex);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleHypertext::get_hyperlinks(IAccessibleHyperlink*** aHyperlinks,
+                                       long* aNHyperlinks) {
+  if (!aHyperlinks || !aNHyperlinks) {
+    return E_INVALIDARG;
+  }
+
+  *aHyperlinks = nullptr;
+  *aNHyperlinks = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessibleWrap* hyperText =
+      static_cast<HyperTextAccessibleWrap*>(this);
+  if (hyperText->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  uint32_t count = hyperText->LinkCount();
+  *aNHyperlinks = count;
+
+  if (count == 0) {
+    *aHyperlinks = nullptr;
+    return S_FALSE;
+  }
+
+  *aHyperlinks = static_cast<IAccessibleHyperlink**>(
+      ::CoTaskMemAlloc(sizeof(IAccessibleHyperlink*) * count));
+  if (!*aHyperlinks) {
+    return E_OUTOFMEMORY;
+  }
+
+  for (uint32_t i = 0; i < count; ++i) {
+    AccessibleWrap* hyperLink =
+        static_cast<AccessibleWrap*>(hyperText->LinkAt(i));
+    MOZ_ASSERT(hyperLink);
+    (*aHyperlinks)[i] = static_cast<IAccessibleHyperlink*>(hyperLink);
+    (*aHyperlinks)[i]->AddRef();
+  }
+
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleHypertext.h b/accessible/windows/ia2/ia2AccessibleHypertext.h
new file mode 100644
index 0000000000..2cdda4cf75
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleHypertext.h
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_HYPERTEXT_H
+#define _ACCESSIBLE_HYPERTEXT_H
+
+#include "nsISupports.h"
+
+#include "ia2AccessibleText.h"
+#include "AccessibleHypertext2.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleHypertext : public ia2AccessibleText,
+                               public IAccessibleHypertext2 {
+ public:
+  // IAccessibleText
+  FORWARD_IACCESSIBLETEXT(ia2AccessibleText)
+
+  // IAccessibleHypertext
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nHyperlinks(
+      /* [retval][out] */ long* hyperlinkCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_hyperlink(
+      /* [in] */ long index,
+      /* [retval][out] */ IAccessibleHyperlink** hyperlink);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_hyperlinkIndex(
+      /* [in] */ long charIndex,
+      /* [retval][out] */ long* hyperlinkIndex);
+
+  // IAccessibleHypertext2
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_hyperlinks(
+      /* [out, size_is(,*nHyperlinks)] */ IAccessibleHyperlink*** hyperlinks,
+      /* [out, retval] */ long* nHyperlinks);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleImage.cpp b/accessible/windows/ia2/ia2AccessibleImage.cpp
new file mode 100644
index 0000000000..ad198bb759
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleImage.cpp
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleImage.h"
+
+#include "AccessibleImage_i.c"
+
+#include "ImageAccessibleWrap.h"
+#include "IUnknownImpl.h"
+#include "nsIAccessibleTypes.h"
+
+#include "nsString.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleImage::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleImage == iid) {
+    *ppv = static_cast<IAccessibleImage*>(this);
+    (static_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+// IAccessibleImage
+
+STDMETHODIMP
+ia2AccessibleImage::get_description(BSTR* aDescription) {
+  if (!aDescription) return E_INVALIDARG;
+
+  *aDescription = nullptr;
+
+  ImageAccessibleWrap* acc = static_cast<ImageAccessibleWrap*>(this);
+  if (acc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString description;
+  acc->Name(description);
+  if (description.IsEmpty()) return S_FALSE;
+
+  *aDescription = ::SysAllocStringLen(description.get(), description.Length());
+  return *aDescription ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
+                                      long* aX, long* aY) {
+  if (!aX || !aY) return E_INVALIDARG;
+
+  *aX = 0;
+  *aY = 0;
+
+  ImageAccessibleWrap* imageAcc = static_cast<ImageAccessibleWrap*>(this);
+  if (imageAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  uint32_t geckoCoordType =
+      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+  nsIntPoint pos = imageAcc->Position(geckoCoordType);
+  *aX = pos.x;
+  *aY = pos.y;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleImage::get_imageSize(long* aHeight, long* aWidth) {
+  if (!aHeight || !aWidth) return E_INVALIDARG;
+
+  *aHeight = 0;
+  *aWidth = 0;
+
+  ImageAccessibleWrap* imageAcc = static_cast<ImageAccessibleWrap*>(this);
+  if (imageAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  nsIntSize size = imageAcc->Size();
+  *aHeight = size.width;
+  *aWidth = size.height;
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleImage.h b/accessible/windows/ia2/ia2AccessibleImage.h
new file mode 100644
index 0000000000..23c7b74f77
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleImage.h
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_IMAGE_H
+#define _ACCESSIBLE_IMAGE_H
+
+#include "AccessibleImage.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleImage : public IAccessibleImage {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleImage
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_description(
+      /* [retval][out] */ BSTR* description);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_imagePosition(
+      /* [in] */ enum IA2CoordinateType coordinateType,
+      /* [out] */ long* x,
+      /* [retval][out] */ long* y);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_imageSize(
+      /* [out] */ long* height,
+      /* [retval][out] */ long* width);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleRelation.cpp b/accessible/windows/ia2/ia2AccessibleRelation.cpp
new file mode 100644
index 0000000000..1e920c5376
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleRelation.cpp
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleRelation.h"
+
+#include "Relation.h"
+#include "nsID.h"
+
+#include "AccessibleRelation_i.c"
+
+using namespace mozilla::a11y;
+
+ia2AccessibleRelation::ia2AccessibleRelation(RelationType aType, Relation* aRel)
+    : mType(aType) {
+  Accessible* target = nullptr;
+  while ((target = aRel->Next())) mTargets.AppendElement(target);
+}
+
+// IUnknown
+
+IMPL_IUNKNOWN_QUERY_HEAD(ia2AccessibleRelation)
+IMPL_IUNKNOWN_QUERY_IFACE(IAccessibleRelation)
+IMPL_IUNKNOWN_QUERY_IFACE(IUnknown)
+IMPL_IUNKNOWN_QUERY_TAIL
+
+// IAccessibleRelation
+
+STDMETHODIMP
+ia2AccessibleRelation::get_relationType(BSTR* aRelationType) {
+  if (!aRelationType) return E_INVALIDARG;
+
+  *aRelationType = nullptr;
+
+#define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
+  case RelationType::geckoType:                                            \
+    *aRelationType = ::SysAllocString(ia2Type);                            \
+    break;
+
+  switch (mType) {
+#include "RelationTypeMap.h"
+  }
+
+  return *aRelationType ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleRelation::get_localizedRelationType(BSTR* aLocalizedRelationType) {
+  if (!aLocalizedRelationType) return E_INVALIDARG;
+
+  *aLocalizedRelationType = nullptr;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2AccessibleRelation::get_nTargets(long* aNTargets) {
+  if (!aNTargets) return E_INVALIDARG;
+
+  *aNTargets = mTargets.Length();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleRelation::get_target(long aTargetIndex, IUnknown** aTarget) {
+  if (aTargetIndex < 0 || (uint32_t)aTargetIndex >= mTargets.Length() ||
+      !aTarget)
+    return E_INVALIDARG;
+
+  AccessibleWrap* target =
+      static_cast<AccessibleWrap*>(mTargets[aTargetIndex].get());
+  *aTarget = static_cast<IAccessible*>(target);
+  (*aTarget)->AddRef();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleRelation::get_targets(long aMaxTargets, IUnknown** aTargets,
+                                   long* aNTargets) {
+  if (!aNTargets || !aTargets) return E_INVALIDARG;
+
+  *aNTargets = 0;
+  long maxTargets = mTargets.Length();
+  if (maxTargets > aMaxTargets) maxTargets = aMaxTargets;
+
+  for (long idx = 0; idx < maxTargets; idx++) get_target(idx, aTargets + idx);
+
+  *aNTargets = maxTargets;
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleRelation.h b/accessible/windows/ia2/ia2AccessibleRelation.h
new file mode 100644
index 0000000000..afed4be56e
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleRelation.h
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _NS_ACCESSIBLE_RELATION_WRAP_H
+#define _NS_ACCESSIBLE_RELATION_WRAP_H
+
+#include "Accessible.h"
+#include "IUnknownImpl.h"
+
+#include <utility>
+#include "nsTArray.h"
+
+#include "AccessibleRelation.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleRelation final : public IAccessibleRelation {
+ public:
+  ia2AccessibleRelation(RelationType aType, Relation* aRel);
+
+  ia2AccessibleRelation(RelationType aType,
+                        nsTArray<RefPtr<Accessible>>&& aTargets)
+      : mType(aType), mTargets(std::move(aTargets)) {}
+
+  // IUnknown
+  DECL_IUNKNOWN
+
+  // IAccessibleRelation
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relationType(
+      /* [retval][out] */ BSTR* relationType);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedRelationType(
+      /* [retval][out] */ BSTR* localizedRelationType);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nTargets(
+      /* [retval][out] */ long* nTargets);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_target(
+      /* [in] */ long targetIndex,
+      /* [retval][out] */ IUnknown** target);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_targets(
+      /* [in] */ long maxTargets,
+      /* [length_is][size_is][out] */ IUnknown** target,
+      /* [retval][out] */ long* nTargets);
+
+  inline bool HasTargets() const { return mTargets.Length(); }
+
+ private:
+  ia2AccessibleRelation();
+  ia2AccessibleRelation(const ia2AccessibleRelation&);
+  ia2AccessibleRelation& operator=(const ia2AccessibleRelation&);
+
+  RelationType mType;
+  nsTArray<RefPtr<Accessible>> mTargets;
+};
+
+/**
+ * Gecko to IAccessible2 relation types map.
+ */
+
+const WCHAR* const IA2_RELATION_NULL = L"";
+
+#define RELATIONTYPE(geckoType, name, atkType, msaaType, ia2Type) \
+  std::pair<RelationType, const WCHAR* const>(RelationType::geckoType, ia2Type),
+
+static const std::pair<RelationType, const WCHAR* const> sRelationTypePairs[] =
+    {
+#include "RelationTypeMap.h"
+};
+
+#undef RELATIONTYPE
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleTable.cpp b/accessible/windows/ia2/ia2AccessibleTable.cpp
new file mode 100644
index 0000000000..7150c13da2
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleTable.cpp
@@ -0,0 +1,540 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleTable.h"
+
+#include "Accessible2.h"
+#include "AccessibleTable_i.c"
+#include "AccessibleTable2_i.c"
+
+#include "AccessibleWrap.h"
+#include "IUnknownImpl.h"
+#include "Statistics.h"
+#include "TableAccessible.h"
+
+#include "nsCOMPtr.h"
+#include "nsString.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleTable::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleTable == iid) {
+    statistics::IAccessibleTableUsed();
+    *ppv = static_cast<IAccessibleTable*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  if (IID_IAccessibleTable2 == iid) {
+    *ppv = static_cast<IAccessibleTable2*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessibleTable
+
+STDMETHODIMP
+ia2AccessibleTable::get_accessibleAt(long aRowIdx, long aColIdx,
+                                     IUnknown** aAccessible) {
+  return get_cellAt(aRowIdx, aColIdx, aAccessible);
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_caption(IUnknown** aAccessible) {
+  if (!aAccessible) return E_INVALIDARG;
+
+  *aAccessible = nullptr;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AccessibleWrap* caption = static_cast<AccessibleWrap*>(mTable->Caption());
+  if (!caption) return S_FALSE;
+
+  (*aAccessible = static_cast<IAccessible*>(caption))->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_childIndex(long aRowIdx, long aColIdx,
+                                   long* aChildIdx) {
+  if (!aChildIdx) return E_INVALIDARG;
+
+  *aChildIdx = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || aColIdx < 0 ||
+      static_cast<uint32_t>(aRowIdx) >= mTable->RowCount() ||
+      static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  *aChildIdx = mTable->CellIndexAt(aRowIdx, aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_columnDescription(long aColIdx, BSTR* aDescription) {
+  if (!aDescription) return E_INVALIDARG;
+
+  *aDescription = nullptr;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  nsAutoString descr;
+  mTable->ColDescription(aColIdx, descr);
+  if (descr.IsEmpty()) return S_FALSE;
+
+  *aDescription = ::SysAllocStringLen(descr.get(), descr.Length());
+  return *aDescription ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_columnExtentAt(long aRowIdx, long aColIdx,
+                                       long* aSpan) {
+  if (!aSpan) return E_INVALIDARG;
+
+  *aSpan = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || aColIdx < 0 ||
+      static_cast<uint32_t>(aRowIdx) >= mTable->RowCount() ||
+      static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  *aSpan = mTable->ColExtentAt(aRowIdx, aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_columnHeader(IAccessibleTable** aAccessibleTable,
+                                     long* aStartingRowIndex) {
+  if (!aAccessibleTable || !aStartingRowIndex) return E_INVALIDARG;
+
+  *aAccessibleTable = nullptr;
+  *aStartingRowIndex = -1;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_columnIndex(long aCellIdx, long* aColIdx) {
+  if (!aColIdx) return E_INVALIDARG;
+
+  *aColIdx = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aCellIdx < 0) {
+    return E_INVALIDARG;
+  }
+
+  long colIdx = mTable->ColIndexAt(aCellIdx);
+  if (colIdx == -1) {  // Indicates an error.
+    return E_INVALIDARG;
+  }
+
+  *aColIdx = colIdx;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nColumns(long* aColCount) {
+  if (!aColCount) return E_INVALIDARG;
+
+  *aColCount = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  *aColCount = mTable->ColCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nRows(long* aRowCount) {
+  if (!aRowCount) return E_INVALIDARG;
+
+  *aRowCount = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  *aRowCount = mTable->RowCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nSelectedChildren(long* aChildCount) {
+  return get_nSelectedCells(aChildCount);
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nSelectedColumns(long* aColCount) {
+  if (!aColCount) return E_INVALIDARG;
+
+  *aColCount = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  *aColCount = mTable->SelectedColCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nSelectedRows(long* aRowCount) {
+  if (!aRowCount) return E_INVALIDARG;
+
+  *aRowCount = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  *aRowCount = mTable->SelectedRowCount();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_rowDescription(long aRowIdx, BSTR* aDescription) {
+  if (!aDescription) return E_INVALIDARG;
+
+  *aDescription = nullptr;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= mTable->RowCount())
+    return E_INVALIDARG;
+
+  nsAutoString descr;
+  mTable->RowDescription(aRowIdx, descr);
+  if (descr.IsEmpty()) return S_FALSE;
+
+  *aDescription = ::SysAllocStringLen(descr.get(), descr.Length());
+  return *aDescription ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_rowExtentAt(long aRowIdx, long aColIdx, long* aSpan) {
+  if (!aSpan) return E_INVALIDARG;
+
+  *aSpan = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || aColIdx < 0 ||
+      static_cast<uint32_t>(aRowIdx) >= mTable->RowCount() ||
+      static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  *aSpan = mTable->RowExtentAt(aRowIdx, aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_rowHeader(IAccessibleTable** aAccessibleTable,
+                                  long* aStartingColumnIndex) {
+  if (!aAccessibleTable || !aStartingColumnIndex) return E_INVALIDARG;
+
+  *aAccessibleTable = nullptr;
+  *aStartingColumnIndex = -1;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_rowIndex(long aCellIdx, long* aRowIdx) {
+  if (!aRowIdx) return E_INVALIDARG;
+
+  *aRowIdx = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aCellIdx < 0) {
+    return E_INVALIDARG;
+  }
+
+  long rowIdx = mTable->RowIndexAt(aCellIdx);
+  if (rowIdx == -1) {  // Indicates an error.
+    return E_INVALIDARG;
+  }
+
+  *aRowIdx = rowIdx;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedChildren(long aMaxChildren, long** aChildren,
+                                         long* aNChildren) {
+  if (!aChildren || !aNChildren) return E_INVALIDARG;
+
+  *aChildren = nullptr;
+  *aNChildren = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<uint32_t, 30> cellIndices;
+  mTable->SelectedCellIndices(&cellIndices);
+
+  uint32_t maxCells = cellIndices.Length();
+  if (maxCells == 0) return S_FALSE;
+
+  *aChildren = static_cast<LONG*>(moz_xmalloc(sizeof(LONG) * maxCells));
+  *aNChildren = maxCells;
+  for (uint32_t i = 0; i < maxCells; i++) (*aChildren)[i] = cellIndices[i];
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedColumns(long aMaxColumns, long** aColumns,
+                                        long* aNColumns) {
+  return get_selectedColumns(aColumns, aNColumns);
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedRows(long aMaxRows, long** aRows,
+                                     long* aNRows) {
+  return get_selectedRows(aRows, aNRows);
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_summary(IUnknown** aAccessible) {
+  if (!aAccessible) return E_INVALIDARG;
+
+  // Neither html:table nor xul:tree nor ARIA grid/tree have an ability to
+  // link an accessible object to specify a summary. There is closes method
+  // in Table::summary to get a summary as a string which is not mapped
+  // directly to IAccessible2.
+
+  *aAccessible = nullptr;
+  return S_FALSE;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_isColumnSelected(long aColIdx, boolean* aIsSelected) {
+  if (!aIsSelected) return E_INVALIDARG;
+
+  *aIsSelected = false;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  *aIsSelected = mTable->IsColSelected(aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_isRowSelected(long aRowIdx, boolean* aIsSelected) {
+  if (!aIsSelected) return E_INVALIDARG;
+
+  *aIsSelected = false;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= mTable->RowCount())
+    return E_INVALIDARG;
+
+  *aIsSelected = mTable->IsRowSelected(aRowIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_isSelected(long aRowIdx, long aColIdx,
+                                   boolean* aIsSelected) {
+  if (!aIsSelected) return E_INVALIDARG;
+
+  *aIsSelected = false;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || aColIdx < 0 ||
+      static_cast<uint32_t>(aColIdx) >= mTable->ColCount() ||
+      static_cast<uint32_t>(aRowIdx) >= mTable->RowCount())
+    return E_INVALIDARG;
+
+  *aIsSelected = mTable->IsCellSelected(aRowIdx, aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::selectRow(long aRowIdx) {
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= mTable->RowCount())
+    return E_INVALIDARG;
+
+  mTable->SelectRow(aRowIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::selectColumn(long aColIdx) {
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  mTable->SelectCol(aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::unselectRow(long aRowIdx) {
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aRowIdx < 0 || static_cast<uint32_t>(aRowIdx) >= mTable->RowCount())
+    return E_INVALIDARG;
+
+  mTable->UnselectRow(aRowIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::unselectColumn(long aColIdx) {
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aColIdx < 0 || static_cast<uint32_t>(aColIdx) >= mTable->ColCount())
+    return E_INVALIDARG;
+
+  mTable->UnselectCol(aColIdx);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_rowColumnExtentsAtIndex(long aCellIdx, long* aRowIdx,
+                                                long* aColIdx,
+                                                long* aRowExtents,
+                                                long* aColExtents,
+                                                boolean* aIsSelected) {
+  if (!aRowIdx || !aColIdx || !aRowExtents || !aColExtents || !aIsSelected)
+    return E_INVALIDARG;
+
+  *aRowIdx = 0;
+  *aColIdx = 0;
+  *aRowExtents = 0;
+  *aColExtents = 0;
+  *aIsSelected = false;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  if (aCellIdx < 0) {
+    return E_INVALIDARG;
+  }
+
+  int32_t colIdx = 0, rowIdx = 0;
+  mTable->RowAndColIndicesAt(aCellIdx, &rowIdx, &colIdx);
+  if (rowIdx == -1 || colIdx == -1) {  // Indicates an error.
+    return E_INVALIDARG;
+  }
+
+  *aRowIdx = rowIdx;
+  *aColIdx = colIdx;
+  *aRowExtents = mTable->RowExtentAt(rowIdx, colIdx);
+  *aColExtents = mTable->ColExtentAt(rowIdx, colIdx);
+  *aIsSelected = mTable->IsCellSelected(rowIdx, colIdx);
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_modelChange(IA2TableModelChange* aModelChange) {
+  return E_NOTIMPL;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessibleTable2
+
+STDMETHODIMP
+ia2AccessibleTable::get_cellAt(long aRowIdx, long aColIdx, IUnknown** aCell) {
+  if (!aCell) return E_INVALIDARG;
+
+  *aCell = nullptr;
+
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AccessibleWrap* cell =
+      static_cast<AccessibleWrap*>(mTable->CellAt(aRowIdx, aColIdx));
+  if (!cell) return E_INVALIDARG;
+
+  (*aCell = static_cast<IAccessible*>(cell))->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_nSelectedCells(long* aCellCount) {
+  if (!aCellCount) return E_INVALIDARG;
+
+  *aCellCount = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  *aCellCount = mTable->SelectedCellCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedCells(IUnknown*** aCells,
+                                      long* aNSelectedCells) {
+  if (!aCells || !aNSelectedCells) return E_INVALIDARG;
+
+  *aCells = nullptr;
+  *aNSelectedCells = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<Accessible*, 30> cells;
+  mTable->SelectedCells(&cells);
+  if (cells.IsEmpty()) return S_FALSE;
+
+  *aCells = static_cast<IUnknown**>(
+      ::CoTaskMemAlloc(sizeof(IUnknown*) * cells.Length()));
+  if (!*aCells) return E_OUTOFMEMORY;
+
+  for (uint32_t i = 0; i < cells.Length(); i++) {
+    (*aCells)[i] =
+        static_cast<IAccessible*>(static_cast<AccessibleWrap*>(cells[i]));
+    ((*aCells)[i])->AddRef();
+  }
+
+  *aNSelectedCells = cells.Length();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedColumns(long** aColumns, long* aNColumns) {
+  if (!aColumns || !aNColumns) return E_INVALIDARG;
+
+  *aColumns = nullptr;
+  *aNColumns = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<uint32_t, 30> colIndices;
+  mTable->SelectedColIndices(&colIndices);
+
+  uint32_t maxCols = colIndices.Length();
+  if (maxCols == 0) return S_FALSE;
+
+  *aColumns = static_cast<LONG*>(moz_xmalloc(sizeof(LONG) * maxCols));
+  *aNColumns = maxCols;
+  for (uint32_t i = 0; i < maxCols; i++) (*aColumns)[i] = colIndices[i];
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTable::get_selectedRows(long** aRows, long* aNRows) {
+  if (!aRows || !aNRows) return E_INVALIDARG;
+
+  *aRows = nullptr;
+  *aNRows = 0;
+  if (!mTable) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<uint32_t, 30> rowIndices;
+  mTable->SelectedRowIndices(&rowIndices);
+
+  uint32_t maxRows = rowIndices.Length();
+  if (maxRows == 0) return S_FALSE;
+
+  *aRows = static_cast<LONG*>(moz_xmalloc(sizeof(LONG) * maxRows));
+  *aNRows = maxRows;
+  for (uint32_t i = 0; i < maxRows; i++) (*aRows)[i] = rowIndices[i];
+
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleTable.h b/accessible/windows/ia2/ia2AccessibleTable.h
new file mode 100644
index 0000000000..97b7103d85
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleTable.h
@@ -0,0 +1,172 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_TABLE_H
+#define _ACCESSIBLE_TABLE_H
+
+#include "AccessibleTable.h"
+#include "AccessibleTable2.h"
+
+namespace mozilla {
+namespace a11y {
+
+class TableAccessible;
+
+class ia2AccessibleTable : public IAccessibleTable, public IAccessibleTable2 {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleTable
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_accessibleAt(
+      /* [in] */ long row,
+      /* [in] */ long column,
+      /* [retval][out] */ IUnknown** accessible);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_caption(
+      /* [retval][out] */ IUnknown** accessible);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_childIndex(
+      /* [in] */ long rowIndex,
+      /* [in] */ long columnIndex,
+      /* [retval][out] */ long* childIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnDescription(
+      /* [in] */ long column,
+      /* [retval][out] */ BSTR* description);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnExtentAt(
+      /* [in] */ long row,
+      /* [in] */ long column,
+      /* [retval][out] */ long* nColumnsSpanned);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnHeader(
+      /* [out] */ IAccessibleTable** accessibleTable,
+      /* [retval][out] */ long* startingRowIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnIndex(
+      /* [in] */ long childIndex,
+      /* [retval][out] */ long* columnIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nColumns(
+      /* [retval][out] */ long* columnCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nRows(
+      /* [retval][out] */ long* rowCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nSelectedChildren(
+      /* [retval][out] */ long* childCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nSelectedColumns(
+      /* [retval][out] */ long* columnCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nSelectedRows(
+      /* [retval][out] */ long* rowCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowDescription(
+      /* [in] */ long row,
+      /* [retval][out] */ BSTR* description);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowExtentAt(
+      /* [in] */ long row,
+      /* [in] */ long column,
+      /* [retval][out] */ long* nRowsSpanned);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowHeader(
+      /* [out] */ IAccessibleTable** accessibleTable,
+      /* [retval][out] */ long* startingColumnIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowIndex(
+      /* [in] */ long childIndex,
+      /* [retval][out] */ long* rowIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedChildren(
+      /* [in] */ long maxChildren,
+      /* [length_is][length_is][size_is][size_is][out] */ long** children,
+      /* [retval][out] */ long* nChildren);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedColumns(
+      /* [in] */ long maxColumns,
+      /* [length_is][length_is][size_is][size_is][out] */ long** columns,
+      /* [retval][out] */ long* nColumns);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedRows(
+      /* [in] */ long maxRows,
+      /* [length_is][length_is][size_is][size_is][out] */ long** rows,
+      /* [retval][out] */ long* nRows);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_summary(
+      /* [retval][out] */ IUnknown** accessible);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_isColumnSelected(
+      /* [in] */ long column,
+      /* [retval][out] */ boolean* isSelected);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_isRowSelected(
+      /* [in] */ long row,
+      /* [retval][out] */ boolean* isSelected);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_isSelected(
+      /* [in] */ long row,
+      /* [in] */ long column,
+      /* [retval][out] */ boolean* isSelected);
+
+  virtual HRESULT STDMETHODCALLTYPE selectRow(
+      /* [in] */ long row);
+
+  virtual HRESULT STDMETHODCALLTYPE selectColumn(
+      /* [in] */ long column);
+
+  virtual HRESULT STDMETHODCALLTYPE unselectRow(
+      /* [in] */ long row);
+
+  virtual HRESULT STDMETHODCALLTYPE unselectColumn(
+      /* [in] */ long column);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowColumnExtentsAtIndex(
+      /* [in] */ long index,
+      /* [out] */ long* row,
+      /* [out] */ long* column,
+      /* [out] */ long* rowExtents,
+      /* [out] */ long* columnExtents,
+      /* [retval][out] */ boolean* isSelected);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_modelChange(
+      /* [retval][out] */ IA2TableModelChange* modelChange);
+
+  // IAccessibleTable2
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_cellAt(
+      /* [in] */ long row,
+      /* [in] */ long column,
+      /* [out, retval] */ IUnknown** cell);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nSelectedCells(
+      /* [out, retval] */ long* cellCount);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedCells(
+      /* [out, size_is(,*nSelectedCells,)] */ IUnknown*** cells,
+      /* [out, retval] */ long* nSelectedCells);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedColumns(
+      /* [out, size_is(,*nColumns)] */ long** selectedColumns,
+      /* [out, retval] */ long* nColumns);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectedRows(
+      /* [out, size_is(,*nRows)] */ long** selectedRows,
+      /* [out, retval] */ long* nRows);
+
+ protected:
+  ia2AccessibleTable(TableAccessible* aTable) : mTable(aTable) {}
+
+  TableAccessible* mTable;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleTableCell.cpp b/accessible/windows/ia2/ia2AccessibleTableCell.cpp
new file mode 100644
index 0000000000..c1589d0acd
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleTableCell.cpp
@@ -0,0 +1,187 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleTableCell.h"
+
+#include "AccessibleTable2_i.c"
+#include "AccessibleTableCell_i.c"
+
+#include "AccessibleWrap.h"
+#include "TableAccessible.h"
+#include "TableCellAccessible.h"
+#include "IUnknownImpl.h"
+
+#include "nsCOMPtr.h"
+#include "nsString.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleTableCell::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleTableCell == iid) {
+    *ppv = static_cast<IAccessibleTableCell*>(this);
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessibleTableCell
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_table(IUnknown** aTable) {
+  if (!aTable) return E_INVALIDARG;
+
+  *aTable = nullptr;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  TableAccessible* table = mTableCell->Table();
+  if (!table) return E_FAIL;
+
+  AccessibleWrap* wrap = static_cast<AccessibleWrap*>(table->AsAccessible());
+  *aTable = static_cast<IAccessible*>(wrap);
+  (*aTable)->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_columnExtent(long* aSpan) {
+  if (!aSpan) return E_INVALIDARG;
+
+  *aSpan = 0;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aSpan = mTableCell->ColExtent();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_columnHeaderCells(IUnknown*** aCellAccessibles,
+                                              long* aNColumnHeaderCells) {
+  if (!aCellAccessibles || !aNColumnHeaderCells) return E_INVALIDARG;
+
+  *aCellAccessibles = nullptr;
+  *aNColumnHeaderCells = 0;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<Accessible*, 10> cells;
+  mTableCell->ColHeaderCells(&cells);
+
+  *aNColumnHeaderCells = cells.Length();
+  *aCellAccessibles = static_cast<IUnknown**>(
+      ::CoTaskMemAlloc(sizeof(IUnknown*) * cells.Length()));
+
+  if (!*aCellAccessibles) return E_OUTOFMEMORY;
+
+  for (uint32_t i = 0; i < cells.Length(); i++) {
+    AccessibleWrap* cell = static_cast<AccessibleWrap*>(cells[i]);
+    (*aCellAccessibles)[i] = static_cast<IAccessible*>(cell);
+    (*aCellAccessibles)[i]->AddRef();
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_columnIndex(long* aColIdx) {
+  if (!aColIdx) return E_INVALIDARG;
+
+  *aColIdx = -1;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aColIdx = mTableCell->ColIdx();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_rowExtent(long* aSpan) {
+  if (!aSpan) return E_INVALIDARG;
+
+  *aSpan = 0;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aSpan = mTableCell->RowExtent();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_rowHeaderCells(IUnknown*** aCellAccessibles,
+                                           long* aNRowHeaderCells) {
+  if (!aCellAccessibles || !aNRowHeaderCells) return E_INVALIDARG;
+
+  *aCellAccessibles = nullptr;
+  *aNRowHeaderCells = 0;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<Accessible*, 10> cells;
+  mTableCell->RowHeaderCells(&cells);
+
+  *aNRowHeaderCells = cells.Length();
+  *aCellAccessibles = static_cast<IUnknown**>(
+      ::CoTaskMemAlloc(sizeof(IUnknown*) * cells.Length()));
+  if (!*aCellAccessibles) return E_OUTOFMEMORY;
+
+  for (uint32_t i = 0; i < cells.Length(); i++) {
+    AccessibleWrap* cell = static_cast<AccessibleWrap*>(cells[i]);
+    (*aCellAccessibles)[i] = static_cast<IAccessible*>(cell);
+    (*aCellAccessibles)[i]->AddRef();
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_rowIndex(long* aRowIdx) {
+  if (!aRowIdx) return E_INVALIDARG;
+
+  *aRowIdx = -1;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aRowIdx = mTableCell->RowIdx();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_rowColumnExtents(long* aRowIdx, long* aColIdx,
+                                             long* aRowExtents,
+                                             long* aColExtents,
+                                             boolean* aIsSelected) {
+  if (!aRowIdx || !aColIdx || !aRowExtents || !aColExtents || !aIsSelected)
+    return E_INVALIDARG;
+
+  *aRowIdx = *aColIdx = *aRowExtents = *aColExtents = 0;
+  *aIsSelected = false;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aRowIdx = mTableCell->RowIdx();
+  *aColIdx = mTableCell->ColIdx();
+  *aRowExtents = mTableCell->RowExtent();
+  *aColExtents = mTableCell->ColExtent();
+  *aIsSelected = mTableCell->Selected();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleTableCell::get_isSelected(boolean* aIsSelected) {
+  if (!aIsSelected) return E_INVALIDARG;
+
+  *aIsSelected = false;
+  if (!mTableCell) return CO_E_OBJNOTCONNECTED;
+
+  *aIsSelected = mTableCell->Selected();
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleTableCell.h b/accessible/windows/ia2/ia2AccessibleTableCell.h
new file mode 100644
index 0000000000..bb7504f20c
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleTableCell.h
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_TABLECELL_H
+#define _ACCESSIBLE_TABLECELL_H
+
+#include "AccessibleTableCell.h"
+
+namespace mozilla {
+namespace a11y {
+class TableCellAccessible;
+
+class ia2AccessibleTableCell : public IAccessibleTableCell {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleTableCell
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_table(
+      /* [out, retval] */ IUnknown** table);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnExtent(
+      /* [out, retval] */ long* nColumnsSpanned);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnHeaderCells(
+      /* [out, size_is(,*nColumnHeaderCells,)] */ IUnknown*** cellAccessibles,
+      /* [out, retval] */ long* nColumnHeaderCells);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_columnIndex(
+      /* [out, retval] */ long* columnIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowExtent(
+      /* [out, retval] */ long* nRowsSpanned);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowHeaderCells(
+      /* [out, size_is(,*nRowHeaderCells,)] */ IUnknown*** cellAccessibles,
+      /* [out, retval] */ long* nRowHeaderCells);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowIndex(
+      /* [out, retval] */ long* rowIndex);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_rowColumnExtents(
+      /* [out] */ long* row,
+      /* [out] */ long* column,
+      /* [out] */ long* rowExtents,
+      /* [out] */ long* columnExtents,
+      /* [out, retval] */ boolean* isSelected);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_isSelected(
+      /* [out, retval] */ boolean* isSelected);
+
+ protected:
+  ia2AccessibleTableCell(TableCellAccessible* aTableCell)
+      : mTableCell(aTableCell) {}
+
+  TableCellAccessible* mTableCell;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleText.cpp b/accessible/windows/ia2/ia2AccessibleText.cpp
new file mode 100644
index 0000000000..85cd7113f2
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleText.cpp
@@ -0,0 +1,464 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleText.h"
+
+#include "AccessibleText_i.c"
+
+#include "HyperTextAccessibleWrap.h"
+#include "HyperTextAccessible-inl.h"
+#include "ProxyWrappers.h"
+#include "mozilla/ClearOnShutdown.h"
+
+using namespace mozilla::a11y;
+
+StaticRefPtr<HyperTextAccessibleWrap> ia2AccessibleText::sLastTextChangeAcc;
+StaticAutoPtr<nsString> ia2AccessibleText::sLastTextChangeString;
+uint32_t ia2AccessibleText::sLastTextChangeStart = 0;
+uint32_t ia2AccessibleText::sLastTextChangeEnd = 0;
+bool ia2AccessibleText::sLastTextChangeWasInsert = false;
+
+// IAccessibleText
+
+STDMETHODIMP
+ia2AccessibleText::addSelection(long aStartOffset, long aEndOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  return textAcc->AddToSelection(aStartOffset, aEndOffset) ? S_OK
+                                                           : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_attributes(long aOffset, long* aStartOffset,
+                                  long* aEndOffset, BSTR* aTextAttributes) {
+  if (!aStartOffset || !aEndOffset || !aTextAttributes) return E_INVALIDARG;
+
+  *aStartOffset = 0;
+  *aEndOffset = 0;
+  *aTextAttributes = nullptr;
+
+  int32_t startOffset = 0, endOffset = 0;
+  HRESULT hr;
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  nsCOMPtr<nsIPersistentProperties> attributes =
+      textAcc->TextAttributes(true, aOffset, &startOffset, &endOffset);
+
+  hr = AccessibleWrap::ConvertToIA2Attributes(attributes, aTextAttributes);
+  if (FAILED(hr)) return hr;
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_caretOffset(long* aOffset) {
+  if (!aOffset) return E_INVALIDARG;
+
+  *aOffset = -1;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  *aOffset = textAcc->CaretOffset();
+
+  return *aOffset != -1 ? S_OK : S_FALSE;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_characterExtents(long aOffset,
+                                        enum IA2CoordinateType aCoordType,
+                                        long* aX, long* aY, long* aWidth,
+                                        long* aHeight) {
+  if (!aX || !aY || !aWidth || !aHeight) return E_INVALIDARG;
+  *aX = *aY = *aWidth = *aHeight = 0;
+
+  uint32_t geckoCoordType =
+      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+  nsIntRect rect;
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  rect = textAcc->CharBounds(aOffset, geckoCoordType);
+
+  // Can't use GetRect() because of long vs. int32_t mismatch
+  *aX = rect.X();
+  *aY = rect.Y();
+  *aWidth = rect.Width();
+  *aHeight = rect.Height();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_nSelections(long* aNSelections) {
+  if (!aNSelections) return E_INVALIDARG;
+  *aNSelections = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  *aNSelections = textAcc->SelectionCount();
+
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_offsetAtPoint(long aX, long aY,
+                                     enum IA2CoordinateType aCoordType,
+                                     long* aOffset) {
+  if (!aOffset) return E_INVALIDARG;
+  *aOffset = 0;
+
+  uint32_t geckoCoordType =
+      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  *aOffset = textAcc->OffsetAtPoint(aX, aY, geckoCoordType);
+
+  return *aOffset == -1 ? S_FALSE : S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_selection(long aSelectionIndex, long* aStartOffset,
+                                 long* aEndOffset) {
+  if (!aStartOffset || !aEndOffset) return E_INVALIDARG;
+  *aStartOffset = *aEndOffset = 0;
+
+  int32_t startOffset = 0, endOffset = 0;
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  if (!textAcc->SelectionBoundsAt(aSelectionIndex, &startOffset, &endOffset)) {
+    return E_INVALIDARG;
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_text(long aStartOffset, long aEndOffset, BSTR* aText) {
+  if (!aText) return E_INVALIDARG;
+
+  *aText = nullptr;
+
+  nsAutoString text;
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) {
+    return E_INVALIDARG;
+  }
+
+  textAcc->TextSubstring(aStartOffset, aEndOffset, text);
+
+  if (text.IsEmpty()) return S_FALSE;
+
+  *aText = ::SysAllocStringLen(text.get(), text.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textBeforeOffset(long aOffset,
+                                        enum IA2TextBoundaryType aBoundaryType,
+                                        long* aStartOffset, long* aEndOffset,
+                                        BSTR* aText) {
+  if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+  *aStartOffset = *aEndOffset = 0;
+  *aText = nullptr;
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  nsAutoString text;
+  int32_t startOffset = 0, endOffset = 0;
+
+  if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+    startOffset = 0;
+    endOffset = textAcc->CharacterCount();
+    textAcc->TextSubstring(startOffset, endOffset, text);
+  } else {
+    AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+    if (boundaryType == -1) return S_FALSE;
+
+    textAcc->TextBeforeOffset(aOffset, boundaryType, &startOffset, &endOffset,
+                              text);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  if (text.IsEmpty()) return S_FALSE;
+
+  *aText = ::SysAllocStringLen(text.get(), text.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textAfterOffset(long aOffset,
+                                       enum IA2TextBoundaryType aBoundaryType,
+                                       long* aStartOffset, long* aEndOffset,
+                                       BSTR* aText) {
+  if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+  *aStartOffset = 0;
+  *aEndOffset = 0;
+  *aText = nullptr;
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  nsAutoString text;
+  int32_t startOffset = 0, endOffset = 0;
+
+  if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+    startOffset = 0;
+    endOffset = textAcc->CharacterCount();
+    textAcc->TextSubstring(startOffset, endOffset, text);
+  } else {
+    AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+    if (boundaryType == -1) return S_FALSE;
+    textAcc->TextAfterOffset(aOffset, boundaryType, &startOffset, &endOffset,
+                             text);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  if (text.IsEmpty()) return S_FALSE;
+
+  *aText = ::SysAllocStringLen(text.get(), text.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textAtOffset(long aOffset,
+                                    enum IA2TextBoundaryType aBoundaryType,
+                                    long* aStartOffset, long* aEndOffset,
+                                    BSTR* aText) {
+  if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+  *aStartOffset = *aEndOffset = 0;
+  *aText = nullptr;
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  nsAutoString text;
+  int32_t startOffset = 0, endOffset = 0;
+  if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+    startOffset = 0;
+    endOffset = textAcc->CharacterCount();
+    textAcc->TextSubstring(startOffset, endOffset, text);
+  } else {
+    AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+    if (boundaryType == -1) return S_FALSE;
+    textAcc->TextAtOffset(aOffset, boundaryType, &startOffset, &endOffset,
+                          text);
+  }
+
+  *aStartOffset = startOffset;
+  *aEndOffset = endOffset;
+
+  if (text.IsEmpty()) return S_FALSE;
+
+  *aText = ::SysAllocStringLen(text.get(), text.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::removeSelection(long aSelectionIndex) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  return textAcc->RemoveFromSelection(aSelectionIndex) ? S_OK : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::setCaretOffset(long aOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+  textAcc->SetCaretOffset(aOffset);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::setSelection(long aSelectionIndex, long aStartOffset,
+                                long aEndOffset) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  return textAcc->SetSelectionBoundsAt(aSelectionIndex, aStartOffset,
+                                       aEndOffset)
+             ? S_OK
+             : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_nCharacters(long* aNCharacters) {
+  if (!aNCharacters) return E_INVALIDARG;
+  *aNCharacters = 0;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  *aNCharacters = textAcc->CharacterCount();
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::scrollSubstringTo(long aStartIndex, long aEndIndex,
+                                     enum IA2ScrollType aScrollType) {
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartIndex, aEndIndex)) return E_INVALIDARG;
+
+  textAcc->ScrollSubstringTo(aStartIndex, aEndIndex, aScrollType);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::scrollSubstringToPoint(long aStartIndex, long aEndIndex,
+                                          enum IA2CoordinateType aCoordType,
+                                          long aX, long aY) {
+  uint32_t geckoCoordType =
+      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+  MOZ_ASSERT(!HyperTextProxyFor(this));
+
+  HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
+  if (textAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  if (!textAcc->IsValidRange(aStartIndex, aEndIndex)) return E_INVALIDARG;
+
+  textAcc->ScrollSubstringToPoint(aStartIndex, aEndIndex, geckoCoordType, aX,
+                                  aY);
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_newText(IA2TextSegment* aNewText) {
+  return GetModifiedText(true, aNewText);
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_oldText(IA2TextSegment* aOldText) {
+  return GetModifiedText(false, aOldText);
+}
+
+// ia2AccessibleText
+
+HRESULT
+ia2AccessibleText::GetModifiedText(bool aGetInsertedText,
+                                   IA2TextSegment* aText) {
+  if (!aText) return E_INVALIDARG;
+
+  if (!sLastTextChangeAcc) return S_OK;
+
+  if (aGetInsertedText != sLastTextChangeWasInsert) return S_OK;
+
+  if (sLastTextChangeAcc != this) return S_OK;
+
+  aText->start = sLastTextChangeStart;
+  aText->end = sLastTextChangeEnd;
+
+  if (sLastTextChangeString->IsEmpty()) return S_FALSE;
+
+  aText->text = ::SysAllocStringLen(sLastTextChangeString->get(),
+                                    sLastTextChangeString->Length());
+  return aText->text ? S_OK : E_OUTOFMEMORY;
+}
+
+AccessibleTextBoundary ia2AccessibleText::GetGeckoTextBoundary(
+    enum IA2TextBoundaryType aBoundaryType) {
+  switch (aBoundaryType) {
+    case IA2_TEXT_BOUNDARY_CHAR:
+      return nsIAccessibleText::BOUNDARY_CHAR;
+    case IA2_TEXT_BOUNDARY_WORD:
+      return nsIAccessibleText::BOUNDARY_WORD_START;
+    case IA2_TEXT_BOUNDARY_LINE:
+      return nsIAccessibleText::BOUNDARY_LINE_START;
+    case IA2_TEXT_BOUNDARY_PARAGRAPH:
+      return nsIAccessibleText::BOUNDARY_PARAGRAPH;
+    // case IA2_TEXT_BOUNDARY_SENTENCE:
+    // XXX: not implemented
+    default:
+      return -1;
+  }
+}
+
+void ia2AccessibleText::InitTextChangeData() {
+  ClearOnShutdown(&sLastTextChangeAcc);
+  ClearOnShutdown(&sLastTextChangeString);
+}
+
+void ia2AccessibleText::UpdateTextChangeData(HyperTextAccessibleWrap* aAcc,
+                                             bool aInsert, const nsString& aStr,
+                                             int32_t aStart, uint32_t aLen) {
+  if (!sLastTextChangeString) sLastTextChangeString = new nsString();
+
+  sLastTextChangeAcc = aAcc;
+  sLastTextChangeStart = aStart;
+  sLastTextChangeEnd = aStart + aLen;
+  sLastTextChangeWasInsert = aInsert;
+  *sLastTextChangeString = aStr;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleText.h b/accessible/windows/ia2/ia2AccessibleText.h
new file mode 100644
index 0000000000..cd4f1ad5a7
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleText.h
@@ -0,0 +1,234 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_TEXT_H
+#define _ACCESSIBLE_TEXT_H
+
+#include "AccessibleText.h"
+
+namespace mozilla {
+namespace a11y {
+class HyperTextAccessibleWrap;
+
+class ia2AccessibleText : public IAccessibleText {
+ public:
+  // IAccessibleText
+  virtual HRESULT STDMETHODCALLTYPE addSelection(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_attributes(
+      /* [in] */ long offset,
+      /* [out] */ long* startOffset,
+      /* [out] */ long* endOffset,
+      /* [retval][out] */ BSTR* textAttributes);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_caretOffset(
+      /* [retval][out] */ long* offset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_characterExtents(
+      /* [in] */ long offset,
+      /* [in] */ enum IA2CoordinateType coordType,
+      /* [out] */ long* x,
+      /* [out] */ long* y,
+      /* [out] */ long* width,
+      /* [retval][out] */ long* height);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nSelections(
+      /* [retval][out] */ long* nSelections);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_offsetAtPoint(
+      /* [in] */ long x,
+      /* [in] */ long y,
+      /* [in] */ enum IA2CoordinateType coordType,
+      /* [retval][out] */ long* offset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selection(
+      /* [in] */ long selectionIndex,
+      /* [out] */ long* startOffset,
+      /* [retval][out] */ long* endOffset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_text(
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset,
+      /* [retval][out] */ BSTR* text);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_textBeforeOffset(
+      /* [in] */ long offset,
+      /* [in] */ enum IA2TextBoundaryType boundaryType,
+      /* [out] */ long* startOffset,
+      /* [out] */ long* endOffset,
+      /* [retval][out] */ BSTR* text);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_textAfterOffset(
+      /* [in] */ long offset,
+      /* [in] */ enum IA2TextBoundaryType boundaryType,
+      /* [out] */ long* startOffset,
+      /* [out] */ long* endOffset,
+      /* [retval][out] */ BSTR* text);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_textAtOffset(
+      /* [in] */ long offset,
+      /* [in] */ enum IA2TextBoundaryType boundaryType,
+      /* [out] */ long* startOffset,
+      /* [out] */ long* endOffset,
+      /* [retval][out] */ BSTR* text);
+
+  virtual HRESULT STDMETHODCALLTYPE removeSelection(
+      /* [in] */ long selectionIndex);
+
+  virtual HRESULT STDMETHODCALLTYPE setCaretOffset(
+      /* [in] */ long offset);
+
+  virtual HRESULT STDMETHODCALLTYPE setSelection(
+      /* [in] */ long selectionIndex,
+      /* [in] */ long startOffset,
+      /* [in] */ long endOffset);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nCharacters(
+      /* [retval][out] */ long* nCharacters);
+
+  virtual HRESULT STDMETHODCALLTYPE scrollSubstringTo(
+      /* [in] */ long startIndex,
+      /* [in] */ long endIndex,
+      /* [in] */ enum IA2ScrollType scrollType);
+
+  virtual HRESULT STDMETHODCALLTYPE scrollSubstringToPoint(
+      /* [in] */ long startIndex,
+      /* [in] */ long endIndex,
+      /* [in] */ enum IA2CoordinateType coordinateType,
+      /* [in] */ long x,
+      /* [in] */ long y);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_newText(
+      /* [retval][out] */ IA2TextSegment* newText);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_oldText(
+      /* [retval][out] */ IA2TextSegment* oldText);
+
+  static void InitTextChangeData();
+  static void UpdateTextChangeData(HyperTextAccessibleWrap* aAcc, bool aInsert,
+                                   const nsString& aStr, int32_t aStart,
+                                   uint32_t aLen);
+
+ protected:
+  static StaticRefPtr<HyperTextAccessibleWrap> sLastTextChangeAcc;
+  static StaticAutoPtr<nsString> sLastTextChangeString;
+  static bool sLastTextChangeWasInsert;
+  static uint32_t sLastTextChangeStart;
+  static uint32_t sLastTextChangeEnd;
+
+ private:
+  HRESULT GetModifiedText(bool aGetInsertedText, IA2TextSegment* aNewText);
+  AccessibleTextBoundary GetGeckoTextBoundary(
+      enum IA2TextBoundaryType coordinateType);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#define FORWARD_IACCESSIBLETEXT(Class)                                         \
+  virtual HRESULT STDMETHODCALLTYPE addSelection(long startOffset,             \
+                                                 long endOffset) {             \
+    return Class::addSelection(startOffset, endOffset);                        \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_attributes(                            \
+      long offset, long* startOffset, long* endOffset, BSTR* textAttributes) { \
+    return Class::get_attributes(offset, startOffset, endOffset,               \
+                                 textAttributes);                              \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_caretOffset(long* offset) {            \
+    return Class::get_caretOffset(offset);                                     \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_characterExtents(                      \
+      long offset, enum IA2CoordinateType coordType, long* x, long* y,         \
+      long* width, long* height) {                                             \
+    return Class::get_characterExtents(offset, coordType, x, y, width,         \
+                                       height);                                \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_nSelections(long* nSelections) {       \
+    return Class::get_nSelections(nSelections);                                \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_offsetAtPoint(                         \
+      long x, long y, enum IA2CoordinateType coordType, long* offset) {        \
+    return Class::get_offsetAtPoint(x, y, coordType, offset);                  \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_selection(                             \
+      long selectionIndex, long* startOffset, long* endOffset) {               \
+    return Class::get_selection(selectionIndex, startOffset, endOffset);       \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_text(long startOffset, long endOffset, \
+                                             BSTR* text) {                     \
+    return Class::get_text(startOffset, endOffset, text);                      \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_textBeforeOffset(                      \
+      long offset, enum IA2TextBoundaryType boundaryType, long* startOffset,   \
+      long* endOffset, BSTR* text) {                                           \
+    return Class::get_textBeforeOffset(offset, boundaryType, startOffset,      \
+                                       endOffset, text);                       \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_textAfterOffset(                       \
+      long offset, enum IA2TextBoundaryType boundaryType, long* startOffset,   \
+      long* endOffset, BSTR* text) {                                           \
+    return Class::get_textAfterOffset(offset, boundaryType, startOffset,       \
+                                      endOffset, text);                        \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_textAtOffset(                          \
+      long offset, enum IA2TextBoundaryType boundaryType, long* startOffset,   \
+      long* endOffset, BSTR* text) {                                           \
+    return Class::get_textAtOffset(offset, boundaryType, startOffset,          \
+                                   endOffset, text);                           \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE removeSelection(long selectionIndex) {     \
+    return Class::removeSelection(selectionIndex);                             \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE setCaretOffset(long offset) {              \
+    return Class::setCaretOffset(offset);                                      \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE setSelection(                              \
+      long selectionIndex, long startOffset, long endOffset) {                 \
+    return Class::setSelection(selectionIndex, startOffset, endOffset);        \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_nCharacters(long* nCharacters) {       \
+    return Class::get_nCharacters(nCharacters);                                \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE scrollSubstringTo(                         \
+      long startIndex, long endIndex, enum IA2ScrollType scrollType) {         \
+    return Class::scrollSubstringTo(startIndex, endIndex, scrollType);         \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE scrollSubstringToPoint(                    \
+      long startIndex, long endIndex, enum IA2CoordinateType coordinateType,   \
+      long x, long y) {                                                        \
+    return Class::scrollSubstringToPoint(startIndex, endIndex, coordinateType, \
+                                         x, y);                                \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_newText(IA2TextSegment* newText) {     \
+    return Class::get_newText(newText);                                        \
+  }                                                                            \
+                                                                               \
+  virtual HRESULT STDMETHODCALLTYPE get_oldText(IA2TextSegment* oldText) {     \
+    return Class::get_oldText(oldText);                                        \
+  }
+
+#endif
diff --git a/accessible/windows/ia2/ia2AccessibleValue.cpp b/accessible/windows/ia2/ia2AccessibleValue.cpp
new file mode 100644
index 0000000000..7c41ba5758
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleValue.cpp
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 "ia2AccessibleValue.h"
+
+#include "AccessibleValue_i.c"
+
+#include "AccessibleWrap.h"
+#include "Accessible-inl.h"
+#include "IUnknownImpl.h"
+
+#include "mozilla/FloatingPoint.h"
+
+using namespace mozilla::a11y;
+
+// IUnknown
+
+STDMETHODIMP
+ia2AccessibleValue::QueryInterface(REFIID iid, void** ppv) {
+  if (!ppv) return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessibleValue == iid) {
+    AccessibleWrap* valueAcc = static_cast<AccessibleWrap*>(this);
+    if (valueAcc->HasNumericValue()) {
+      *ppv = static_cast<IAccessibleValue*>(this);
+      valueAcc->AddRef();
+      return S_OK;
+    }
+
+    return E_NOINTERFACE;
+  }
+
+  return E_NOINTERFACE;
+}
+
+// IAccessibleValue
+
+STDMETHODIMP
+ia2AccessibleValue::get_currentValue(VARIANT* aCurrentValue) {
+  if (!aCurrentValue) return E_INVALIDARG;
+
+  VariantInit(aCurrentValue);
+
+  AccessibleWrap* valueAcc = static_cast<AccessibleWrap*>(this);
+  double currentValue;
+  MOZ_ASSERT(!valueAcc->IsProxy());
+  if (valueAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  currentValue = valueAcc->CurValue();
+
+  if (IsNaN(currentValue)) return S_FALSE;
+
+  aCurrentValue->vt = VT_R8;
+  aCurrentValue->dblVal = currentValue;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleValue::setCurrentValue(VARIANT aValue) {
+  if (aValue.vt != VT_R8) return E_INVALIDARG;
+
+  AccessibleWrap* valueAcc = static_cast<AccessibleWrap*>(this);
+  MOZ_ASSERT(!valueAcc->IsProxy());
+
+  if (valueAcc->IsDefunct()) return CO_E_OBJNOTCONNECTED;
+
+  return valueAcc->SetCurValue(aValue.dblVal) ? S_OK : E_FAIL;
+}
+
+STDMETHODIMP
+ia2AccessibleValue::get_maximumValue(VARIANT* aMaximumValue) {
+  if (!aMaximumValue) return E_INVALIDARG;
+
+  VariantInit(aMaximumValue);
+
+  AccessibleWrap* valueAcc = static_cast<AccessibleWrap*>(this);
+  double maximumValue;
+  MOZ_ASSERT(!valueAcc->IsProxy());
+  if (valueAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  maximumValue = valueAcc->MaxValue();
+
+  if (IsNaN(maximumValue)) return S_FALSE;
+
+  aMaximumValue->vt = VT_R8;
+  aMaximumValue->dblVal = maximumValue;
+  return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleValue::get_minimumValue(VARIANT* aMinimumValue) {
+  if (!aMinimumValue) return E_INVALIDARG;
+
+  VariantInit(aMinimumValue);
+
+  AccessibleWrap* valueAcc = static_cast<AccessibleWrap*>(this);
+  double minimumValue;
+  MOZ_ASSERT(!valueAcc->IsProxy());
+  if (valueAcc->IsDefunct()) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+
+  minimumValue = valueAcc->MinValue();
+
+  if (IsNaN(minimumValue)) return S_FALSE;
+
+  aMinimumValue->vt = VT_R8;
+  aMinimumValue->dblVal = minimumValue;
+  return S_OK;
+}
diff --git a/accessible/windows/ia2/ia2AccessibleValue.h b/accessible/windows/ia2/ia2AccessibleValue.h
new file mode 100644
index 0000000000..e430c60e5a
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleValue.h
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=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 _ACCESSIBLE_VALUE_H
+#define _ACCESSIBLE_VALUE_H
+
+#include "AccessibleValue.h"
+
+namespace mozilla {
+namespace a11y {
+
+class ia2AccessibleValue : public IAccessibleValue {
+ public:
+  // IUnknown
+  STDMETHODIMP QueryInterface(REFIID, void**);
+
+  // IAccessibleValue
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_currentValue(
+      /* [retval][out] */ VARIANT* currentValue);
+
+  virtual HRESULT STDMETHODCALLTYPE setCurrentValue(
+      /* [in] */ VARIANT value);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_maximumValue(
+      /* [retval][out] */ VARIANT* maximumValue);
+
+  virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_minimumValue(
+      /* [retval][out] */ VARIANT* minimumValue);
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif
diff --git a/accessible/windows/ia2/moz.build b/accessible/windows/ia2/moz.build
new file mode 100644
index 0000000000..7357fe48a8
--- /dev/null
+++ b/accessible/windows/ia2/moz.build
@@ -0,0 +1,58 @@
+# -*- 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/.
+
+EXPORTS += [
+    "ia2Accessible.h",
+    "ia2AccessibleAction.h",
+    "ia2AccessibleComponent.h",
+    "ia2AccessibleEditableText.h",
+    "ia2AccessibleHyperlink.h",
+    "ia2AccessibleHypertext.h",
+    "ia2AccessibleText.h",
+    "ia2AccessibleValue.h",
+]
+
+UNIFIED_SOURCES += [
+    "ia2Accessible.cpp",
+    "ia2AccessibleAction.cpp",
+    "ia2AccessibleComponent.cpp",
+    "ia2AccessibleEditableText.cpp",
+    "ia2AccessibleHyperlink.cpp",
+    "ia2AccessibleHypertext.cpp",
+    "ia2AccessibleImage.cpp",
+    "ia2AccessibleRelation.cpp",
+    "ia2AccessibleText.cpp",
+    "ia2AccessibleValue.cpp",
+]
+
+# These files cannot be built in unified mode because they both include
+# AccessibleTable2_i.c.
+SOURCES += [
+    "ia2AccessibleTable.cpp",
+    "ia2AccessibleTableCell.cpp",
+]
+
+LOCAL_INCLUDES += [
+    "/accessible/base",
+    "/accessible/generic",
+    "/accessible/html",
+    "/accessible/windows",
+    "/accessible/windows/msaa",
+    "/accessible/xpcom",
+    "/accessible/xul",
+]
+
+FINAL_LIBRARY = "xul"
+
+# The Windows MIDL code generator creates things like:
+#
+#   #endif !_MIDL_USE_GUIDDEF_
+#
+# which clang-cl complains about.  MSVC doesn't, so turn this warning off.
+if CONFIG["CC_TYPE"] == "clang-cl":
+    CXXFLAGS += ["-Wno-extra-tokens"]
+
+include("/ipc/chromium/chromium-config.mozbuild")