diff -r 000000000000 -r 6474c204b198 xpcom/base/nsIConsoleMessage.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/base/nsIConsoleMessage.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 4; 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 "nsISupports.idl"
+
+/**
+ * This is intended as a base interface; implementations may want to
+ * provide an object that can be qi'ed to provide more specific
+ * message information.
+ */
+[scriptable, uuid(c14c151b-5ea4-47ed-8e85-d392cdd3e154)]
+interface nsIConsoleMessage : nsISupports
+{
+    /**
+     * The time (in milliseconds from the Epoch) that the message instance
+     * was initialised.
+     * The timestamp is initialized as JS_now/1000 so that it can be
+     * compared to Date.now in Javascript.
+     */
+    readonly attribute long long timeStamp;
+
+    [binaryname(MessageMoz)] readonly attribute wstring message;
+
+    AUTF8String toString();
+};
+
+%{ C++
+#define NS_CONSOLEMESSAGE_CID \
+{ 0x024efc9e, 0x54dc, 0x4844, { 0x80, 0x4b, 0x41, 0xd3, 0xf3, 0x69, 0x90, 0x73 }}
+%}