All bookmarks have disappeared and restore option fails
Yesterday (9-Sep-2016) my bookmarks in FFP suddenly disappeared. In addition, when I click the bookmarks icon, the panel of bookmarks no longer appears on the right side of the screen. If I select Show All Bookmarks, a "Library" window opens, but is empty. If, from that Library window, I take the option to Restore (under Import and Backup) , I get a pop-up saying "Unable to process the backup file". I tried numerous back-ups that Firefox had created, but got the same message every time.