I lost all my bookmarks. I tried all recommendations to repair without success, and decided to accept it and start again yet am unable to add bookmarks now - hitting the star doesn't work. I refreshed firefox, deleted and reinstalled. I keep getting the error message "The bookmarks and history system will not be functional because..." When I try to restore I keep getting error message "Unable to process the back up file" - doesn't matter what date I choose. What the hell has happened? I've had so many links and pages saved - now all gone...!!