I recently tried to backup my files onto external hard drive. This went as expected and worked. The program on the back up drive also asked if I wanted to clear any existing favorites on my computer and I did so not realizing what would happen. Now when I go into firefox>bookmarks>organize bookmarks>library the left pane is always empty. I used to be able to go here and organize my bookmarks/folders here but nothing ever goes here anymore no matter where I surf or what I do.