All proxy server settings in mac lab deleted possibly after a firefox update? How can I recover settings without manually doing on all machines?

Most (if not all) of my lab machines have lost their proxy settings...weird...has never happened before. Because the settings were in firefox, I assume it is because of a recent firefox update. First...is there any way to revert back to the previous settings so I don't have to manually reconfigure all users on all machines. Second...please make sure that this doesn't happen again when updates are implemented. Third...does anybody know anything about pushing out a proxy setting through ARD?

Sound like a corrupted or deleted file prefs.js in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder]
See:
* http://kb.mozillazine.org/Preferences_not_saved

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