diff -r 000000000000 -r 6474c204b198 dom/interfaces/storage/nsIDOMStorageEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/storage/nsIDOMStorageEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "domstubs.idl"
+#include "nsIDOMEvent.idl"
+
+/**
+ * Interface for a client side storage. See
+ * http://dev.w3.org/html5/webstorage/#the-storage-event
+ * for more information.
+ *
+ * Event sent to a window when a storage area changes.
+ */
+
+interface nsIDOMStorage;
+
+[scriptable, builtinclass, uuid(85f04275-4679-4e89-b43f-142bbbab1e89)]
+interface nsIDOMStorageEvent : nsIDOMEvent
+{
+  /**
+   * Attribute represents the key being changed. The key attribute is null
+   * when change has been invoked by the storage clear() method.
+   */
+  readonly attribute DOMString key;
+
+  /**
+   * The original value of the key. The oldValue is null when the change
+   * has been invoked by storage clear() method or the key has been newly
+   * added and therefor doesn't have any previous value.
+   */
+  readonly attribute DOMString oldValue;
+
+  /**
+   * The new value of the key. The newValue is null when the change
+   * has been invoked by storage clear() method or the key has been removed
+   * from the storage.
+   */
+  readonly attribute DOMString newValue;
+
+  /**
+   * Represents the address of the document whose key changed.
+   */
+  readonly attribute DOMString url;
+
+  /**
+   * Represents the Storage object that was affected.
+   */
+  readonly attribute nsIDOMStorage storageArea;
+
+  /**
+   * Initialize the event in a manner analogous to the similarly-named method
+   * in the DOM Events interfaces.
+   */
+  void initStorageEvent(in DOMString typeArg, 
+                        in boolean canBubbleArg, 
+                        in boolean cancelableArg, 
+                        in DOMString keyArg,
+                        in DOMString oldValueArg,
+                        in DOMString newValueArg,
+                        in DOMString urlArg,
+                        in nsIDOMStorage storageAreaArg);
+};