diff -r 000000000000 -r 6474c204b198 dom/interfaces/core/nsIDOMComment.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/core/nsIDOMComment.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* -*- 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 "nsIDOMCharacterData.idl"
+
+/**
+ * The nsIDOMComment interface inherits from nsIDOMCharacterData and represents 
+ * the content of a comment, i.e., all the characters between the starting 
+ * '<!--' and ending '-->'.
+ * 
+ * For more information on this interface please see 
+ * http://www.w3.org/TR/DOM-Level-2-Core/
+ */
+
+[scriptable, uuid(e702a5d2-3aa8-4788-b048-2d3b3e6d16f2)]
+interface nsIDOMComment : nsIDOMCharacterData
+{
+};