I uninstalled FF4...Went online with IE and found FF3.5.6 which I had before. Primarily because my Norton Tool Bar is not yet compatible with FF4....I was bummed. Simply download the FF3.5.6. Save it to desktop...uninstall FF4 Then install the 3.5.6. and away you go. It works fine.

Older version of Firefox 3.6 can be downloaded here: http://www.mozilla.com/en-US/firefox/all-older.html

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