diff --git a/accessible/aom/AccessibleNode.cpp b/accessible/aom/AccessibleNode.cpp
index dd26c6a29fe4..2fbd2d7bd36b 100644
--- a/accessible/aom/AccessibleNode.cpp
+++ b/accessible/aom/AccessibleNode.cpp
@@ -6,6 +6,7 @@
 #include "AccessibleNode.h"
 #include "mozilla/dom/AccessibleNodeBinding.h"
 #include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/DOMStringList.h"
 
 #include "Accessible-inl.h"
 #include "nsAccessibilityService.h"
@@ -61,6 +62,20 @@ AccessibleNode::GetRole(nsAString& aRole)
   aRole.AssignLiteral("unknown");
 }
 
+void
+AccessibleNode::GetStates(nsTArray<nsString>& aStates)
+{
+  if (mIntl) {
+    if (!mStates) {
+      mStates = GetOrCreateAccService()->GetStringStates(mIntl->State());
+    }
+    aStates = mStates->StringArray();
+    return;
+  }
+
+  mStates->Add(NS_LITERAL_STRING("defunct"));
+}
+
 nsINode*
 AccessibleNode::GetDOMNode()
 {
diff --git a/accessible/aom/AccessibleNode.h b/accessible/aom/AccessibleNode.h
index 355bb395c897..0a75e18d55b4 100644
--- a/accessible/aom/AccessibleNode.h
+++ b/accessible/aom/AccessibleNode.h
@@ -9,6 +9,8 @@
 
 #include "nsWrapperCache.h"
 #include "mozilla/RefPtr.h"
+#include "nsTArray.h"
+#include "nsString.h"
 
 class nsINode;
 
@@ -20,6 +22,7 @@ namespace a11y {
 
 namespace dom {
 
+class DOMStringList;
 struct ParentObject;
 
 class AccessibleNode : public nsISupports,
@@ -35,8 +38,11 @@ public:
   virtual dom::ParentObject GetParentObject() const final;
 
   void GetRole(nsAString& aRole);
+  void GetStates(nsTArray<nsString>& aStates);
   nsINode* GetDOMNode();
 
+  a11y::Accessible* Internal() const { return mIntl; }
+
 protected:
   AccessibleNode(const AccessibleNode& aCopy) = delete;
   AccessibleNode& operator=(const AccessibleNode& aCopy) = delete;
@@ -44,6 +50,7 @@ protected:
 
   RefPtr<a11y::Accessible> mIntl;
   RefPtr<nsINode> mDOMNode;
+  RefPtr<dom::DOMStringList> mStates;
 };
 
 } // dom
diff --git a/accessible/aom/moz.build b/accessible/aom/moz.build
index 700081215312..c1adb0cc77d6 100644
--- a/accessible/aom/moz.build
+++ b/accessible/aom/moz.build
@@ -5,11 +5,11 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 EXPORTS.mozilla.dom += [
-    'AccessibleNode.h',
+    'AccessibleNode.h'
 ]
 
 UNIFIED_SOURCES += [
-    'AccessibleNode.cpp',
+    'AccessibleNode.cpp'
 ]
 
 LOCAL_INCLUDES += [
diff --git a/accessible/tests/mochitest/aom/test_general.html b/accessible/tests/mochitest/aom/test_general.html
index 5812ac55f5f4..e67b51c4e19c 100644
--- a/accessible/tests/mochitest/aom/test_general.html
+++ b/accessible/tests/mochitest/aom/test_general.html
@@ -49,6 +49,34 @@
     is(anode.role, 'document', 'correct role of a document accessible node');
     is(anode.DOMNode, ifrDoc, 'correct DOM Node of a document accessible node');
 
+    // States may differ depending on the document state, for example, if it is
+    // loaded or is loading still.
+    var states = null;
+    switch (anode.states.length) {
+      case 5:
+        states = [
+          'readonly', 'focusable', 'opaque', 'enabled', 'sensitive'
+        ];
+        break;
+      case 6:
+        states = [
+          'readonly', 'busy', 'focusable', 'opaque', 'enabled', 'sensitive'
+        ];
+        break;
+      case 7:
+        states = [
+          'readonly', 'busy', 'focusable', 'opaque', 'stale', 'enabled', 'sensitive'
+        ];
+        break;
+      default:
+        ok(false, 'Unexpected amount of states');
+    }
+    if (states) {
+      for (var i = 0; i < states.length; i++) {
+        is(anode.states[i], states[i], `${states[i]} state is expected at ${i}th index`);
+      }
+    }
+
     finish();
   }
   </script>
diff --git a/dom/webidl/AccessibleNode.webidl b/dom/webidl/AccessibleNode.webidl
index 42bc93aa9f78..544fe06304aa 100644
--- a/dom/webidl/AccessibleNode.webidl
+++ b/dom/webidl/AccessibleNode.webidl
@@ -7,5 +7,7 @@
 [Pref="accessibility.AOM.enabled"]
 interface AccessibleNode {
   readonly attribute DOMString role;
+  [Frozen, Cached, Pure]
+  readonly attribute sequence<DOMString> states;
   readonly attribute Node? DOMNode;
 };