It is possible that the profiles.ini file got reverted to an older version and that you are using a different profile or a new profile. You can check if there is more than one profile in the location of the profiles. You can use this button to go to the currently used Firefox profile folder: *Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder) *http://kb.mozillazine.org/Profile_folder_-_Firefox *http://kb.mozillazine.org/Recovering_a_missing_profile *https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Hi, you can also try: Open bookmarks > Show All Bookmarks > Import and Backup > Restore. Hope that helps.