Click the Bookmarks button and select Show All Bookmarks.
   At the top of the Library window, click on Import and Backup and select Restore.
   Click the date of the bookmark backup you want to recover.
   In the new window that appears, click OK.
   Your bookmarks from the selected date should now be restored. 

Hello, Sorry to hear about that. First, Firefox automatically creates backups of your bookmarks, which can be helpful if your bookmarks are lost or missing. Click the Bookmarks button and select Show All Bookmarks. At the top of the Library window, click on Import and Backup and select Restore. Click the date of the bookmark backup you want to recover. In the new window that appears, click OK. Your bookmarks from the selected date should now be restored. For more information, see the [https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them ]article. If the above doesn't work, it could be that a file got corrupted (namely the places.sqlite file). You can install the Places Maintenance extension to run maintenance on the file. Please read the following articles first as they provide helpful hints and instructions that may be relevant to you: [http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox ] [https://support.mozilla.org/en-US/kb/cant-add-change-or-save-bookmarks?redirectlocale=en-US&redirectslug=Bookmarks+not+saved#w_fix-the-bookmarks-file ] Did this fix your problems? Please report back to us! Thank you.