How can I re-download the previous version of Firefox. I have lost most of my add-ons with 4.0 including my password manager. This is a calamity and I've changed my default browser from Firefox. Help!!!
The problem is very simple. As soon as I downloaded Firefox 4.0 I lost my add-ons. The add-ons were the reason I have been using Firefox for several years. This seems to be ludicrous. The new version should be able to manage integration of existing add-ons or the Firefox team should have provided the add-on authors with advance technical information before releasing 4.0 to the world.
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To downgrade to Firefox 3.6 first uninstall Firefox 4, but do not select the option to "Remove my Firefox personal data". If you select that option it will delete your bookmarks, passwords and other user data.
You can then install the latest version of Firefox 3.6 available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your current bookmarks, passwords etc.
To avoid possible problems with downgrading, I recommend going to your profile folder and deleting the following files if they exist - extensions.cache, extensions.rdf, extensions.ini, extensions.sqlite and localstore.rdf. Deleting these files will force Firefox to rebuild the list of installed extensions, checking their compatibility, and reset toolbar customizations.
For details of how to find your profile folder see https://support.mozilla.com/kb/Profiles