diff --git a/browser/installer/unix/browser.jst b/browser/installer/unix/browser.jst
index c06db275a15..e69de29bb2d 100644
--- a/browser/installer/unix/browser.jst
+++ b/browser/installer/unix/browser.jst
@@ -1,117 +0,0 @@
-function upgradeCleanup()
-{
-  // Get rid of Chrome directory cruft.
-  deleteThisFolder("Chrome",      "classic");
-  deleteThisFolder("Chrome",      "comm");
-  deleteThisFolder("Chrome",      "en-mac");
-  deleteThisFile("Chrome",        "en-mac.jar");
-  deleteThisFolder("Chrome",      "en-unix");
-  deleteThisFile("Chrome",        "en-unix.jar");
-  deleteThisFolder("Chrome",      "en-US");
-  deleteThisFolder("Chrome",      "en-win");
-  deleteThisFile("Chrome",        "en-win.jar");
-  deleteThisFolder("Chrome",      "US");
-  deleteThisFile("Chrome",        "help.jar");
-
-  deleteThisFile("Chrome",        "chrome.rdf");
-  deleteThisFile("Chrome",        "installed-chrome.txt");
-  deleteThisFile("Chrome",        "app-chrome.manifest");
-  deleteThisFolder("Chrome",      "overlayinfo");
-
-  // Remove defunct components and type libraries
-  deleteThisFile("Components",    "typeaheadfind.xpt");
-  deleteThisFile("Components",    "chrome.xpt");
-  deleteThisFile("Components",    "ipcd.xpt");
-  deleteThisFile("Components",    "nsUpdateNotifier.js");
-  deleteThisFile("Components",    "nsBackgroundUpdateService.js");
-  deleteThisFile("Components",    "p3p.xpt");
-  deleteThisFile("Components",    "prefmigr.xpt");
-  deleteThisFile("Components",    "profilesharingsetup.xpt");
-  deleteThisFile("Components",    "related.xpt");
-  deleteThisFile("Components",    "ucnative.xpt");
-  deleteThisFile("Components",    "util.xpt");
-  deleteThisFile("Components",    "compreg.dat");
-  deleteThisFile("Components",    "xpti.dat");
-
-  // Remove non-linked xpt files for rev'd interfaces; this prevents a
-  // conflict if you had previously installed a zip build in the app directory.
-  deleteThisFile("Components",    "autocomplete.xpt");
-  
-  // Remove defunct defaults files. 
-  deleteThisFile("Program",	      "defaults/pref/all.js");
-  deleteThisFile("Program",	      "defaults/pref/editor.js");
-  deleteThisFile("Program",	      "defaults/pref/mailnews.js");
-  deleteThisFile("Program",	      "defaults/pref/non-shared.txt");
-  deleteThisFile("Program",	      "defaults/pref/security-prefs.js");
-  deleteThisFile("Program",	      "defaults/pref/unix.js");
-  deleteThisFile("Program",	      "defaults/pref/xpinstall.js");
-  deleteThisFile("Program",	      "defaults/profile/panels.rdf");
-  deleteThisFolder("Program",	    "defaults/profile/US");
-  
-  // Delete dictionary.com search plugin  
-  deleteThisFile("Program",     "searchplugins/dictionary.src");
-  deleteThisFile("Program",     "searchplugins/dictionary.png");
-
-  // These files are related to app patches and will interfere with the 
-  // UA/app version strings if we do not remove them. 
-  deleteThisFile("Program",	    "defaults/pref/bug259708.js");
-  
-  // Remove defunct miscellany
-  deleteThisFolder("Program",     "ipc");
-  deleteThisFile("Program",       "mangle");
-  deleteThisFile("Program",       "mozipcd");
-  deleteThisFile("Program",       "regchrome");
-  deleteThisFile("Program",       "regxpcom");
-  deleteThisFile("Program",       "shlibsign");
-}
-
-var srDest = $SpaceRequired$;
-
-var err = initInstall("$ProductName$", "Browser", "$Version$"); 
-logComment("initInstall: " + err);
-
-var communicatorFolder = getFolder("Program");
-logComment("communicatorFolder: " + communicatorFolder);
-
-if (verifyDiskSpace(communicatorFolder, srDest))
-{
-    // Call upgradeCleanup() before addDirectory() in case we accidentaly
-    // delete files that we happen to be also installing.  This way, if we do,
-    // it will just get reinstalled.  This is for safety measure.
-    upgradeCleanup();
-    err = addDirectory("Program",
-                       "$Version$",
-                       "bin",              // jar source folder
-                       communicatorFolder, // target folder
-                       "",                 // target subdir 
-                       true );             // force flag 
-
-    logComment("addDirectory() returned: " + err);
-
-    // create the plugins folder next to mozilla 
-    var pluginsFolder = getFolder("Plugins");
-    var ignoreErr = dirCreate(pluginsFolder);
-    logComment("dirCreate() returned: " + ignoreErr);
-
-    if (err==SUCCESS)
-    {
-	    err = performInstall(); 
-	    logComment("performInstall() returned: " + err);
-        if (! ('buildID' in Install))
-        {
-          logComment("Running Pre-Mozilla 0.9.1");
-          initInstall("Post-install Cleanup Utility", "Browser/xpicleanup", "$Version$");
-          cleanupUtility = getFolder(communicatorFolder, "xpicleanup");
-          err = File.execute(cleanupUtility);
-          logComment("execute() returned: " + err);
-          err = performInstall();
-        }
-    }
-    else
-    {
-	    cancelInstall(err);
-	    logComment("cancelInstall() due to error: " + err);
-    }
-}
-else
-    cancelInstall(INSUFFICIENT_DISK_SPACE);
diff --git a/browser/installer/windows/browser.jst b/browser/installer/windows/browser.jst
index f96c57f9822..6b005f9b105 100644
--- a/browser/installer/windows/browser.jst
+++ b/browser/installer/windows/browser.jst
@@ -19,6 +19,7 @@ function upgradeCleanup()
   deleteThisFile("Program",     "defaults/pref/security-prefs.js");
   deleteThisFile("Program",     "defaults/pref/winpref.js");
   deleteThisFile("Program",     "defaults/pref/xpinstall.js");
+  deleteThisFile("Program",     "defaults/pref/bug307259.js");
   deleteThisFolder("Program",   "defaults/profile/US");
 
   // Delete dictionary.com search plugin