Revert Back Firefox from version 3 to 2

1. See Backing up your information - Always a good idea to back up your user information first.
2. Download the latest version of Firefox 2 from http://www.oldapps.com/firefox.htm
3. Uninstall Firefox, if you are using the Firefox 3 uninstaller when asked say no to "Remove my Firefox personal data and customizations"
4. Make sure that there are no files left in the installation folder, default location C:\Program Files\Mozilla Firefox
5. Go to your profile folder.

Firefox 3 would have converted your profile to the Firefox 3 format by creating some new files. You should delete these files along with some others to avoid having problems either now or when you decide to update to Firefox 3 at a later date.

1. Delete the following files:
   • content-prefs.sqlite
   • places.sqlite
   • downloads.sqlite
   • cookies.sqlite
   • permissions.sqlite
   • formhistory.sqlite
   • signons3.txt (if the profile folder does not contain a file called signons2.txt you can also remove key3.db)
   • urlcalssifier3.txt
   • extensions.cache
   • extensions.rdf
   • extensions.ini
   • localstore.rdf
2. Install Firefox 2.