diff --git a/mozilla/tools/performance/startup/miniXul.xul b/mozilla/tools/performance/startup/miniXul.xul
index 0f440f28035..0f5ed5f8af8 100644
--- a/mozilla/tools/performance/startup/miniXul.xul
+++ b/mozilla/tools/performance/startup/miniXul.xul
@@ -2,17 +2,6 @@
 
 <!DOCTYPE window>
 
-<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-    <script type="application/x-javascript">
-        <![CDATA[
-            function onload() {
-                var n = window.arguments[0] - 1;
-                if ( n ) {
-                    // We need to open more windows.
-                    window.opener.openWindows(n);
-                    //window.openDialog("chrome://navigator/content/miniXul.xul","_blank","chrome,all", n);
-                }
-            }
-        ]]>
-    </script>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        id="miniXul">
 </window>
diff --git a/mozilla/tools/performance/startup/open10Windows.xul b/mozilla/tools/performance/startup/open10Windows.xul
index c59c3d798e1..866fa019ed7 100644
--- a/mozilla/tools/performance/startup/open10Windows.xul
+++ b/mozilla/tools/performance/startup/open10Windows.xul
@@ -3,15 +3,19 @@
 <!DOCTYPE window>
 
 <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-        onload="window.setTimeout( 'onload(11);', 2000 );">
+        id="open10Windows"
+        onload="onload();">
     <script type="application/x-javascript">
         <![CDATA[
-            function onload(n) {
-                if ( n ) {
-                    window.openDialog("chrome://navigator/content/miniXul.xul","_blank","chrome,all");
-                    window.setTimeout( 'onload(n-1);', 2000 );
+            var n = 11;
+            function onload() {
+                while( n-- ) {
+                    window.setTimeout( 'openMiniXul();', n*2000 );
                 }
             }
+            function openMiniXul(n) {
+                window.openDialog("chrome://navigator/content/miniXul.xul","_blank","","chrome,all");
+            }
         ]]>
     </script>
 </window>