diff --git a/browser/base/content/about.gif b/browser/base/content/about.gif
new file mode 100644
index 000000000000..32959c011276
Binary files /dev/null and b/browser/base/content/about.gif differ
diff --git a/browser/base/content/aboutDialog.xul b/browser/base/content/aboutDialog.xul
new file mode 100644
index 000000000000..33090282e596
--- /dev/null
+++ b/browser/base/content/aboutDialog.xul
@@ -0,0 +1,85 @@
+<?xml version="1.0"?> <!-- -*- Mode: HTML -*- --> 
+
+<!-- ***** 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 Phoenix about dialog.
+   -
+   - The Initial Developer of the Original Code is
+   - Blake Ross (blaker@netscape.com).
+   - Portions created by the Initial Developer are Copyright (C) 2002
+   - the Initial Developer. All Rights Reserved.
+   -
+   - Contributor(s):
+   -
+   - 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 ***** -->
+
+<?xml-stylesheet href="chrome://global/skin/" type="text/css"?> 
+
+<!DOCTYPE window [
+<!ENTITY % brandDTD SYSTEM "chrome://global/locale/brand.dtd" >
+%brandDTD;
+<!ENTITY % aboutDialogDTD SYSTEM "chrome://browser/locale/aboutDialog.dtd" >
+%aboutDialogDTD;
+]>
+
+<dialog xmlns:html="http://www.w3.org/1999/xhtml"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        buttons="accept"
+        onload="onLoad();"
+        title="&aboutDialog.title;"
+        windowtype="navigator:browser"
+        width="300" height="320"
+        screenX="4" screenY="4"
+        persist="screenX screenY width height sizemode"> 
+    
+    <script type="application/x-javascript">
+      <![CDATA[
+        function onLoad() {
+          var userAgentField = document.getElementById("userAgent");
+          userAgentField.value = navigator.userAgent;
+          var versionField = document.getElementById("version");
+          versionField.setAttribute("value", navigator.userAgent.match(/rv:([^;)]+)/)[1]);
+        }
+      ]]>
+    </script>
+
+    <vbox align="center" flex="1">
+      <image src="chrome://browser/content/about.gif"/>
+      <separator class="thin"/>
+      <hbox>
+        <label value="&brandShortName;" style="font-weight: bold;"/>
+        <label id="version"/>
+      </hbox>
+      <spacer flex="1"/>
+      <textbox id="userAgent" multiline="true" readonly="true" cols="60"
+               style="border: none; padding: none; margin: none;"/>
+      <html:a href="http://www.mozilla.org/projects/phoenix/"
+            target="_new"
+            style="display: block; color: blue; text-decoration: underline;">&copyright;</html:a>
+      <spacer flex="1"/>
+    </vbox>
+    <separator class="groove"/>
+</dialog>
\ No newline at end of file
diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index b379e8c6d48f..fc7661c590ac 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -2482,7 +2482,7 @@ function OpenTaskURL( inURL )
 
 function goAboutDialog()
 {
-  window.openDialog("chrome://global/content/about.xul", "About", "modal,chrome,resizable=yes,height=450,width=550");
+  window.openDialog("chrome://browser/content/aboutDialog.xul", "About", "modal,chrome,resizable=no");
 }
 
 
diff --git a/browser/base/jar.mn b/browser/base/jar.mn
index feffad29ace8..ec8fcbc53608 100644
--- a/browser/base/jar.mn
+++ b/browser/base/jar.mn
@@ -6,6 +6,8 @@ browser.jar:
         content/browser/customizeToolbar.xul          (content/customizeToolbar.xul)
         content/browser/customizeToolbar.js           (content/customizeToolbar.js)
         content/browser/customizeToolbar.css          (content/customizeToolbar.css)
+        content/browser/about.gif                     (content/about.gif)
+        content/browser/aboutDialog.xul               (content/aboutDialog.xul)
 
 classic.jar:
         skin/classic/browser/browser.css              (skin/browser.css)
@@ -41,6 +43,7 @@ en-US.jar:
         locale/en-US/browser/browser.dtd              (locale/browser.dtd)
         locale/en-US/browser/browser.properties       (locale/browser.properties)
         locale/en-US/browser/customizeToolbar.dtd     (locale/customizeToolbar.dtd)
+        locale/en-US/browser/aboutDialog.dtd          (locale/aboutDialog.dtd)
 
 US.jar:
         locale/US/browser-region/region.properties    (locale/region.properties)
diff --git a/browser/base/locale/aboutDialog.dtd b/browser/base/locale/aboutDialog.dtd
new file mode 100644
index 000000000000..e37b0e538c59
--- /dev/null
+++ b/browser/base/locale/aboutDialog.dtd
@@ -0,0 +1,2 @@
+<!ENTITY aboutDialog.title      "About &brandShortName;">
+<!ENTITY copyright              "Copyright and contributor information">
\ No newline at end of file