Some words of caution, the database file ''places.sqlite'' stores both the browsing history and the bookmarks, so you are in danger of loosing bookmarks when trying to solve this problem. Firefox also saves some backup copies of bookmarks, but as they are by default within your profile, there is also a danger they may be lost, coupled with the fact that restoring such backups overwrites any existing file it is good practice to make a copy of your bookmarks manually, and export them somewhere safe. (or maybe even copy the whole set of profile files somewhere safe, including the bookmarks backup folder whilst working on this problem) * see [[backing up and restoring bookmarks]] Have a look at the article [[Toolbar keeps resetting]] and the one it is based on [http://kb.mozillazine.org/Corrupt_localstore.rdf] The first suggestion is to reset the toolbars and controls in safe mode, that will potentially loose some of your customisation/customization but hopefully will solve the problem. If it does not work the next stage is carefully following the instructions to delete the correct ''localstore.rdf'' file. A final last resort remedy will be deleting (BUT rename it, or ensure a copy is retained so it is not lost entirely - if the bookmarks are important, there may be methods of extracting some of the information from the file that you could try) the places.sqlite database, but that will destroy your bookmarks records, and you will be forced to rely on any backups - they may, or may not, work.