See toolbar keeps resetting.

Safe Mode

You May need to reset toolbars and controls via Diagnose Firefox issues using Troubleshoot Mode Make sure you completely close Firefox first. When you get to the Safe Mode window, select Reset toolbars and controls and then Make Changes and Restart.

Uh, are you saying that whenever I add new item to the bookmarks I have to go to safe mode to save them. I just can't believe that. I also lose the toolbar settings. Is this a bug in firefox? This is very concerning. Thanks.

You do not have to go to safe mode to save them every time you make a change. The safe mode option is there to fix a corrupt file, once it has been fixed you should not have to go back into safe mode.

See also http://kb.mozillazine.org/Corrupt_localstore.rdf