--- a/accessible/base/ARIAMap.cpp
+++ b/accessible/base/ARIAMap.cpp
@@ -535,16 +535,27 @@ static nsRoleMapEntry sWAIRoleMaps[] =
     roles::STATUSBAR,
     kUseMapRole,
     eNoValue,
     eNoAction,
     ePoliteLiveAttr,
     kGenericAccType,
     kNoReqStates
   },
+  { // switch
+    &nsGkAtoms::_switch,
+    roles::SWITCH,
+    kUseMapRole,
+    eNoValue,
+    eCheckUncheckAction,
+    eNoLiveAttr,
+    kGenericAccType,
+    kNoReqStates,
+    eARIACheckableBool
+  },
   { // tab
     &nsGkAtoms::tab,
     roles::PAGETAB,
     kUseMapRole,
     eNoValue,
     eSwitchAction,
     eNoLiveAttr,
     kGenericAccType,

--- a/accessible/base/Role.h
+++ b/accessible/base/Role.h
@@ -780,17 +780,22 @@ enum Role {
    */
   DEFINITION = 128,
 
   /**
    * Represent a keyboard or keypad key (ARIA role "key").
    */
   KEY = 129,
 
-  LAST_ROLE = KEY
+  /**
+   * Represent a switch control widget (ARIA role "switch").
+   */
+  SWITCH = 130,
+
+  LAST_ROLE = SWITCH
 };
 
 } // namespace role
 
 typedef enum mozilla::a11y::roles::Role role;
 
 } // namespace a11y
 } // namespace mozilla

--- a/accessible/base/RoleMap.h
+++ b/accessible/base/RoleMap.h
@@ -1050,8 +1050,16 @@ ROLE(DEFINITION,
 
 ROLE(KEY,
      "key",
      ATK_ROLE_PUSH_BUTTON,
      NSAccessibilityButtonRole,
      ROLE_SYSTEM_PUSHBUTTON,
      ROLE_SYSTEM_PUSHBUTTON,
      eNameFromSubtreeRule)
+
+ROLE(SWITCH,
+     "switch",
+     ATK_ROLE_TOGGLE_BUTTON,
+     NSAccessibilityCheckBoxRole,
+     ROLE_SYSTEM_CHECKBUTTON,
+     IA2_ROLE_TOGGLE_BUTTON,
+     eNameFromSubtreeRule)

--- a/accessible/interfaces/nsIAccessibleRole.idl
+++ b/accessible/interfaces/nsIAccessibleRole.idl
@@ -3,17 +3,17 @@
  * 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 "nsISupports.idl"
 
 /**
  * Defines cross platform (Gecko) roles.
  */
-[scriptable, uuid(50db5e86-9a45-4637-a5c3-4ff148c33270)]
+[scriptable, uuid(76ce835f-ef86-47c0-ac7b-e871417f1b6e)]
 interface nsIAccessibleRole : nsISupports
 {
   /**
    * Used when accessible hans't strong defined role.
    */
   const unsigned long ROLE_NOTHING = 0;
 
   /**
@@ -773,9 +773,14 @@ interface nsIAccessibleRole : nsISupport
    * An HTML definition <dd>
    */
   const unsigned long ROLE_DEFINITION = 128;
 
   /**
    * A keyboard or keypad key.
    */
   const unsigned long ROLE_KEY = 129;
+
+  /**
+   * A switch control widget.
+   */
+  const unsigned long ROLE_SWITCH = 130;
 };

--- a/accessible/mac/mozAccessible.mm
+++ b/accessible/mac/mozAccessible.mm
@@ -470,16 +470,19 @@ GetClosestInterestingAccessible(id anObj
       return @"AXDefinitionList"; // 10.6+ NSAccessibilityDefinitionListSubrole;
 
     case roles::TERM:
       return @"AXTerm";
 
     case roles::DEFINITION:
       return @"AXDefinition";
 
+    case roles::SWITCH:
+      return @"AXSwitch";
+
     default:
       break;
   }
 
   return nil;
 }
 
 - (NSString*)roleDescription

--- a/accessible/tests/mochitest/actions/test_aria.html
+++ b/accessible/tests/mochitest/actions/test_aria.html
@@ -81,16 +81,26 @@
           events: CLICK_EVENTS
         },
         {
           ID: "radio",
           actionName: "select",
           events: CLICK_EVENTS
         },
         {
+          ID: "switch_unchecked",
+          actionName: "check",
+          events: CLICK_EVENTS
+        },
+        {
+          ID: "switch_checked",
+          actionName: "uncheck",
+          events: CLICK_EVENTS
+        },
+        {
           ID: "tab",
           actionName: "switch",
           events: CLICK_EVENTS
         },
         {
           ID: "textbox",
           actionName: "activate",
           events: CLICK_EVENTS
@@ -161,16 +171,20 @@
     <div id="menuitemcheckbox" role="menuitemcheckbox">Menuitem checkbox</div>
     <div id="menuitemradio" role="menuitemradio">Menuitem radio</div>
   </div>
 
   <div role="radiogroup">
     <div id="radio" role="radio">Radio</div>
   </div>
 
+  <div id="switch_unchecked" role="switch">Switch</div>
+
+  <div id="switch_checked" role="switch" aria-checked="true">Switch</div>
+
   <div role="tablist">
     <div id="tab" role="tab">Tab</div>
   </div>
 
   <div id="textbox" role="textbox">Textbox</div>
 
   <div role="tree">
     <div id="treeitem" role="treeitem">Treeitem</div>

--- a/accessible/tests/mochitest/events/test_aria_statechange.html
+++ b/accessible/tests/mochitest/events/test_aria_statechange.html
@@ -102,27 +102,38 @@
     }
 
     function setChecked(aID, aValue)
     {
       this.__proto__ =
         new setAttrOfMixedType(aID, "aria-checked", STATE_CHECKED, aValue);
     }
 
+    function buildQueueForAttr(aList, aQueue, aID, aInvokerFunc)
+    {
+      for (var i = 0; i < aList.length; i++) {
+        for (var j = i + 1; j < aList.length; j++) {
+          // XXX: changes from/to "undefined"/"" shouldn't fire state change
+          // events, bug 472142.
+          aQueue.push(new aInvokerFunc(aID, aList[i]));
+          aQueue.push(new aInvokerFunc(aID, aList[j]));
+        }
+      }
+    }
+
     function buildQueueForAttrOfMixedType(aQueue, aID, aInvokerFunc)
     {
       var list = [ "", "undefined", "false", "true", "mixed" ];
-      for (var i = 0; i < list.length; i++) {
-        for (var j = i + 1; j < list.length; j++) {
-          // XXX: changes from/to "undefined"/"" shouldn't fire state change
-          // events, bug 472142.
-          aQueue.push(new aInvokerFunc(aID, list[i]));
-          aQueue.push(new aInvokerFunc(aID, list[j]));
-        }
-      }
+      buildQueueForAttr(list, aQueue, aID, aInvokerFunc);
+    }
+
+    function buildQueueForAttrOfBoolType(aQueue, aID, aInvokerFunc)
+    {
+      var list = [ "", "undefined", "false", "true" ];
+      buildQueueForAttr(list, aQueue, aID, aInvokerFunc);
     }
 
     function doTests()
     {
       gQueue = new eventQueue();
 
       gQueue.push(new expandNode("section", true));
       gQueue.push(new expandNode("section", false));
@@ -130,16 +141,17 @@
       gQueue.push(new expandNode("div", false));
 
       gQueue.push(new busyify("aria_doc", true));
       gQueue.push(new busyify("aria_doc", false));
 
       buildQueueForAttrOfMixedType(gQueue, "pressable", setPressed);
       buildQueueForAttrOfMixedType(gQueue, "pressable_native", setPressed);
       buildQueueForAttrOfMixedType(gQueue, "checkable", setChecked);
+      buildQueueForAttrOfBoolType(gQueue, "checkableBool", setChecked);
 
       gQueue.invoke(); // Will call SimpleTest.finish();
     }
 
     SimpleTest.waitForExplicitFinish();
     addA11yLoadEvent(doTests);
   </script>
 </head>
@@ -161,16 +173,21 @@
      title="mixed state change event is fired for focused accessible only"
     Mozilla Bug 467143
   </a>
   <a target="_blank"
      href="https://bugzilla.mozilla.org/show_bug.cgi?id=989958"
      title="Pressed state is not exposed on a button element with aria-pressed attribute"
     Mozilla Bug 989958
   </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1136563"
+     title="Support ARIA 1.1 switch role"
+    Mozilla Bug 1136563
+  </a>
 
   <p id="display"></p>
   <div id="content" style="display: none"></div>
   <pre id="test">
   </pre>
   <div id="eventdump"></div>
 
   <!-- aria-expanded -->
@@ -181,10 +198,11 @@
   <div id="aria_doc" role="document" tabindex="0">A document</div>
 
   <!-- aria-pressed -->
   <div id="pressable" role="button"></div>
   <button id="pressable_native"></button>
 
   <!-- aria-checked -->
   <div id="checkable" role="checkbox"></div>
+  <div id="checkableBool" role="switch"></div>
 </body>
 </html>

--- a/accessible/tests/mochitest/role.js
+++ b/accessible/tests/mochitest/role.js
@@ -65,16 +65,17 @@ const ROLE_ROW = nsIAccessibleRole.ROLE_
 const ROLE_ROWHEADER = nsIAccessibleRole.ROLE_ROWHEADER;
 const ROLE_SCROLLBAR = nsIAccessibleRole.ROLE_SCROLLBAR;
 const ROLE_SECTION = nsIAccessibleRole.ROLE_SECTION;
 const ROLE_SEPARATOR = nsIAccessibleRole.ROLE_SEPARATOR;
 const ROLE_SLIDER = nsIAccessibleRole.ROLE_SLIDER;
 const ROLE_SPINBUTTON = nsIAccessibleRole.ROLE_SPINBUTTON;
 const ROLE_STATICTEXT = nsIAccessibleRole.ROLE_STATICTEXT;
 const ROLE_STATUSBAR = nsIAccessibleRole.ROLE_STATUSBAR;
+const ROLE_SWITCH = nsIAccessibleRole.ROLE_SWITCH;
 const ROLE_TABLE = nsIAccessibleRole.ROLE_TABLE;
 const ROLE_TERM = nsIAccessibleRole.ROLE_TERM;
 const ROLE_TEXT_CONTAINER = nsIAccessibleRole.ROLE_TEXT_CONTAINER;
 const ROLE_TEXT_LEAF = nsIAccessibleRole.ROLE_TEXT_LEAF;
 const ROLE_TOGGLE_BUTTON = nsIAccessibleRole.ROLE_TOGGLE_BUTTON;
 const ROLE_TOOLBAR = nsIAccessibleRole.ROLE_TOOLBAR;
 const ROLE_TOOLTIP = nsIAccessibleRole.ROLE_TOOLTIP;
 const ROLE_TREE_TABLE = nsIAccessibleRole.ROLE_TREE_TABLE;

--- a/accessible/tests/mochitest/role/test_aria.html
+++ b/accessible/tests/mochitest/role/test_aria.html
@@ -55,16 +55,17 @@
       testRole("aria_region", ROLE_PANE);
       testRole("aria_row", ROLE_ROW);
       testRole("aria_rowheader", ROLE_ROWHEADER);
       testRole("aria_scrollbar", ROLE_SCROLLBAR);
       testRole("aria_separator", ROLE_SEPARATOR);
       testRole("aria_slider", ROLE_SLIDER);
       testRole("aria_spinbutton", ROLE_SPINBUTTON);
       testRole("aria_status", ROLE_STATUSBAR);
+      testRole("aria_switch", ROLE_SWITCH);
       testRole("aria_tab", ROLE_PAGETAB);
       testRole("aria_tablist", ROLE_PAGETABLIST);
       testRole("aria_tabpanel", ROLE_PROPERTYPAGE);
       testRole("aria_textbox", ROLE_ENTRY);
       testRole("aria_timer", ROLE_TEXT_CONTAINER); // weak role
       testRole("aria_toolbar", ROLE_TOOLBAR);
       testRole("aria_tooltip", ROLE_TOOLTIP);
       testRole("aria_tree", ROLE_OUTLINE);
@@ -173,16 +174,21 @@
      href="https://bugzilla.mozilla.org/show_bug.cgi?id=725432">
     Bug 725432
   </a>
   <a target="_blank"
      title="Map ARIA role FORM"
      href="https://bugzilla.mozilla.org/show_bug.cgi?id=735645">
     Bug 735645
   </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1136563"
+     title="Support ARIA 1.1 switch role"
+    Bug 1136563
+  </a>
   <p id="display"></p>
   <div id="content" style="display: none"></div>
   <pre id="test">
   </pre>
 
   <span id="aria_alert" role="alert"/>
   <span id="aria_alertdialog" role="alertdialog"/>
   <span id="aria_application" role="application"/>
@@ -220,16 +226,17 @@
   <span id="aria_region" role="region"/>
   <span id="aria_row" role="row"/>
   <span id="aria_rowheader" role="rowheader"/>
   <span id="aria_scrollbar" role="scrollbar"/>
   <span id="aria_separator" role="separator"/>
   <span id="aria_slider" role="slider"/>
   <span id="aria_spinbutton" role="spinbutton"/>
   <span id="aria_status" role="status"/>
+  <span id="aria_switch" role="switch"/>
   <span id="aria_tab" role="tab"/>
   <span id="aria_tablist" role="tablist"/>
   <span id="aria_tabpanel" role="tabpanel"/>
   <span id="aria_textbox" role="textbox"/>
   <span id="aria_timer" role="timer"/>
   <span id="aria_toolbar" role="toolbar"/>
   <span id="aria_tooltip" role="tooltip"/>
   <span id="aria_tree" role="tree"/>

--- a/accessible/tests/mochitest/states/test_aria.html
+++ b/accessible/tests/mochitest/states/test_aria.html
@@ -87,16 +87,18 @@
         testStates(checkboxElem, 0, 0, STATE_CHECKED);
         checkboxElem.indeterminate = true;
         testStates(checkboxElem, STATE_MIXED, 0);
       }
 
       // aria-checked
       testStates("aria_checked_checkbox", STATE_CHECKED);
       testStates("aria_mixed_checkbox", STATE_MIXED);
+      testStates("aria_checked_switch", STATE_CHECKED);
+      testStates("aria_mixed_switch", 0, 0, STATE_MIXED); // unsupported
 
       // test disabled group and all its descendants to see if they are
       // disabled, too. See bug 429285.
       testAriaDisabledTree("group");
 
       // aria-modal
       testStates("aria_modal", 0, EXT_STATE_MODAL);
       testStates("aria_modal_false", 0, 0, 0, EXT_STATE_MODAL);
@@ -345,16 +347,21 @@
      title="ARIA grid should be editable by default">
     Mozilla Bug 835121
   </a>
   <a target="_blank"
      href="https://bugzilla.mozilla.org/show_bug.cgi?id=989958"
      title="Pressed state is not exposed on a button element with aria-pressed attribute"
     Mozilla Bug 989958
   </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1136563"
+     title="Support ARIA 1.1 switch role"
+    Mozilla Bug 1136563
+  </a>
 
   <p id="display"></p>
   <div id="content" style="display: none"></div>
   <pre id="test">
   </pre>
 
   <div id="textbox_autocomplete_inline" role="textbox" aria-autocomplete="inline"></div>
   <div id="textbox_autocomplete_list" role="textbox" aria-autocomplete="list"></div>
@@ -378,16 +385,25 @@
 
   <div id="aria_checked_checkbox" role="checkbox" aria-checked="true">
     I agree
   </div>
 
   <div id="aria_mixed_checkbox" role="checkbox" aria-checked="mixed">
     I might agree
   </div>
+
+  <div id="aria_checked_switch" role="switch" aria-checked="true">
+    I am switched on
+  </div>
+
+  <div id="aria_mixed_switch" role="switch" aria-checked="mixed">
+    I am unsupported
+  </div>
+
   <div id="aria_modal" aria-modal="true">modal stuff</div>
   <div id="aria_modal_false" aria-modal="false">non modal stuff</div>div>
   <div id="aria_multiline_textbox" role="textbox" aria-multiline="true"></div>
   <div id="aria_multiselectable_listbox" role="listbox" aria-multiselectable="true"></div>
   <div id="aria_pressed_button" role="button" aria-pressed="true">Button</div>
   <button id="aria_pressed_native_button" aria-pressed="true">Button</button>
 
   <div id="aria_readonly_textbox"

--- a/dom/base/nsGkAtomList.h
+++ b/dom/base/nsGkAtomList.h
@@ -2291,16 +2291,17 @@ GK_ATOM(progressbar, "progressbar")
 GK_ATOM(region, "region")
 GK_ATOM(rowgroup, "rowgroup")
 GK_ATOM(rowheader, "rowheader")
 GK_ATOM(select1, "select1")
 GK_ATOM(setsize, "setsize")
 GK_ATOM(spelling, "spelling")
 GK_ATOM(spinbutton, "spinbutton")
 GK_ATOM(status, "status")
+GK_ATOM(_switch, "switch")
 GK_ATOM(tableCellIndex, "table-cell-index")
 GK_ATOM(tablist, "tablist")
 GK_ATOM(textIndent, "text-indent")
 GK_ATOM(textInputType, "text-input-type")
 GK_ATOM(textLineThroughColor, "text-line-through-color")
 GK_ATOM(textLineThroughStyle, "text-line-through-style")
 GK_ATOM(textPosition, "text-position")
 GK_ATOM(textUnderlineColor, "text-underline-color")