upgraded to 3.6, lost bookmarks, lost bookmarks toolbar, lost bookmarks library, can't go to previous backup, get error message. Don't have Torbutton. Can't save new bookmarks. Autofill remembers. Remember history is on.

I had this problem yesterday right after the 3.6.4 upgrade. Im not sure if I saw all the things you did but I def lost all bookmarks and the back button. I have fixed it by: 1. Going to the Firefox profile directory which for me is here but 1st bit will be different for you as mines work specific: C:\Documents and Settings\U049177\Application Data\Mozilla\Firefox\Profiles\soez0lvk.default 2. Delete places.sqlite and places.sqlite-journal 3. Start Firefox (you should have the back button working now but no bookmarks, it will have recreated those 2 files) 4. From the menus, Bookmarks then Organise Bookmarks, then Import and Backup button, then Restore then select a day to restore from. You should now have your bookmarks back from Firefoxes backups. Hope it works for you