diff --git a/browser/components/shell/content/dummyWindow.xul b/browser/components/shell/content/dummyWindow.xul
deleted file mode 100644
index dc32e749ffc..00000000000
--- a/browser/components/shell/content/dummyWindow.xul
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0"?>
-
-<!-- ***** BEGIN LICENSE BLOCK *****
-   - Version: MPL 1.1/GPL 2.0/LGPL 2.1
-   -
-   - 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/
-   -
-   - 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 Original Code is Mozilla WinXP SP1 Support.
-   -
-   - The Initial Developer of the Original Code is
-   - Netscape Communications Corporation.
-   - Portions created by the Initial Developer are Copyright (C) 2002
-   - the Initial Developer. All Rights Reserved.
-   -
-   - Contributor(s):
-   -   Bill Law  <law@netscape.com>
-   -
-   - 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 LGPL or the GPL. 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 ***** -->
-
-<!-- This is a dummy window that autocloses.  See nsDefaultBrowser.js. -->
-
-<!DOCTYPE window>
-
-<window id="dummyWindow" onload="window.close()"
-        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-</window>
diff --git a/browser/components/shell/jar.mn b/browser/components/shell/jar.mn
index 0ba5ddef52f..d1fcf1aa1cb 100644
--- a/browser/components/shell/jar.mn
+++ b/browser/components/shell/jar.mn
@@ -1,7 +1,3 @@
-toolkit.jar:
-    content/global/dummyWindow.xul (content/dummyWindow.xul)
-
 browser.jar:
 *       content/browser/setDesktopBackground.xul              (content/setDesktopBackground.xul)
 *       content/browser/setDesktopBackground.js               (content/setDesktopBackground.js)
-