Can I uninstall Firefox 4 and reinstall my installation file downloaded previously 3.6.6?

I've upgraded to Firefox 4 Win 7, but a necessary extension is not compatible with version 4 and disabled automatically. I need to go back to the previous version of Firefox until the necessary extension is updated for compatibility with Firefox 4. I find the latest installation file, Firefox Setup 3.6.6.exe on my hard drive. I need to know how best to revert to this version and preserve and transfer all my favorites and settings. Thank you!

Downgrade to Firefox 3.6 first of all uninstall Firefox 4, but do not select the option 'remove my Firefox personal data '. If you select this option, it will delete your bookmarks, passwords and other user data.

Then you can install the latest version of Firefox 3.6 (version 3.6.17) available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your favorite courses, passwords etc.

I recommend, to avoid possible problems with decommissioning, accessing your profile folder and delete the following files if they exist - extensions.cache, extensions.rdf, extensions.ini, extensions.sqlite and localstore.rdf. Delete these files will force Firefox to rebuild the list of installed extensions, check their compatibility and cancel the toolbar customizations.

For more information on how to find your profile folder, see https://support.mozilla.com/kb/Profiles

Tags: Firefox

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