Not Reliable Rated 1 out of 5 stars

Crashed Firefox and did not work to restore passwords and saved cookies. Luckily I also backed up with MozBack and it worked flawlessly.

This review is for a previous version of the add-on (5.3.1). 

Did you try a manual restore?

If FEBE fails to restore any item (for whatever reason), you can always restore the backup manually. See and in the FEBE FAQ.