Try restore from the default backup: *[https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them Restore bookmarks from backup or move them to another computer] Other way: First you need show the hidden files and folder. *[http://kb.mozillazine.org/Show_hidden_files_and_folders] Go to your profile: *[https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data Profiles] Enter in the bookmarks backup folder and try get the most recent backup and restore form it, using the process that i posted above. or in your profile folder there is a places.sqlite file, you can use it to restore your bookmarks. *[https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles Back up and restore information in Firefox profiles] Or you can try use a SQLite Manager: *[https://addons.mozilla.org/en-US/firefox/addon/sqlite-manager SQLite Manager]

You can check for problems with the places.sqlite database file in the Firefox profile folder. *http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox *https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file You can also check the Time Machine for an older copy of the places.sqlite file. *http://www.apple.com/support/timemachine/ *https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox