That message is an indicator that the updater wasn't able to update all the files and some were left as older versions. Do a clean reinstall. #Download a fresh Firefox copy and save the file to the desktop. #*Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html #Uninstall your current Firefox version. #*'''''Do not remove personal data when you uninstall the current version''''' #*Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox. #*See [http://support.mozilla.com/en-US/kb/uninstalling+Firefox Uninstalling Firefox] '''''and''''' [http://kb.mozillazine.org/Uninstalling_firefox Uninstalling Firefox (Mozillazine)] #*Also see: [http://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information] '''''and''''' [http://kb.mozillazine.org/Profile_backup Profile backup (Mozillazine)] #Remove the Firefox program folder/directory before installing that newly downloaded copy of the Firefox installer. #*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling. #*See: http://kb.mozillazine.org/Installation_directory #Install the fresh copy of Firefox that you downloaded in step 1 '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You need to update some plug-ins: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox] *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]