diff --git a/browser/base/content/tabbrowser.xml b/browser/base/content/tabbrowser.xml
index 0d903775c18..052731b39cd 100644
--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -1,38 +1,41 @@
 <?xml version="1.0"?>
 
-<!--
-   - The contents of this file are subject to the Mozilla Public
-   - License Version 1.1 (the "License"); you may not use this file
-   - except in compliance with the License. You may obtain a copy of
-   - the License at http://www.mozilla.org/MPL/
+<!-- ***** BEGIN LICENSE BLOCK *****
+   - Version: MPL 1.1/GPL 2.0/LGPL 2.1
    -
-   - Software distributed under the License is distributed on an "AS
-   - IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
-   - implied. See the License for the specific language governing
-   - rights and limitations under the License.
+   - The contents of this file are subject to the Mozilla Public License Version
+   - 1.1 (the "License"); you may not use this file except in compliance with
+   - the License. You may obtain a copy of the License at
+   - http://www.mozilla.org/MPL/
    -
-   - The Original Code is this file as it was released on
-   - March 28, 2001.
+   - Software distributed under the License is distributed on an "AS IS" basis,
+   - WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+   - for the specific language governing rights and limitations under the
+   - License.
    -
-   - The Initial Developer of the Original Code is David Hyatt
-   - Portions created by David Hyatt are Copyright (C) 2001
-   - David Hyatt.  All Rights Reserved.
+   - The Original Code is this file as it was released on March 28, 2001.
+   -
+   - The Initial Developer of the Original Code is
+   - David Hyatt.
+   - Portions created by the Initial Developer are Copyright (C) 2001
+   - the Initial Developer. All Rights Reserved.
    -
    - Contributor(s):
    -   David Hyatt <hyatt@netscape.com> (Original Author of <tabbrowser>)
    -
-   - Alternatively, the contents of this file may be used under the
-   - terms of the GNU General Public License Version 2 or later (the
-   - "GPL"), in which case the provisions of the GPL are applicable
-   - instead of those above.  If you wish to allow use of your
-   - version of this file only under the terms of the GPL and not to
-   - allow others to use your version of this file under the MPL,
-   - indicate your decision by deleting the provisions above and
-   - replace them with the notice and other provisions required by
-   - the GPL.  If you do not delete the provisions above, a recipient
-   - may use your version of this file under either the MPL or the
-   - GPL.
-  -->
+   - Alternatively, the contents of this file may be used under the terms of
+   - either the GNU General Public License Version 2 or later (the "GPL"), or
+   - the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+   - in which case the provisions of the GPL or the LGPL are applicable instead
+   - of those above. If you wish to allow use of your version of this file only
+   - under the terms of either the GPL or the LGPL, and not to allow others to
+   - use your version of this file under the terms of the MPL, indicate your
+   - decision by deleting the provisions above and replace them with the notice
+   - and other provisions required by the GPL or the LGPL. If you do not delete
+   - the provisions above, a recipient may use your version of this file under
+   - the terms of any one of the MPL, the GPL or the LGPL.
+   -
+   - ***** END LICENSE BLOCK ***** -->
 
 <!DOCTYPE bindings [
 <!ENTITY % tabBrowserDTD SYSTEM "chrome://global/locale/tabbrowser.dtd" >