Quite good and useful Rated 4 out of 5 stars

This is a very useful add-on, and works quite well.

The only things I found to grumble about were:

1) The backup is sometimes incomplete (I usually backup just before closing a session - and there is no safeguard against a session closing before the backup is finished saving - so you have to wait and guess when it is done).

2) Whenever you install FEBE it it loads a welcome page (some people might be fine with this - but if you use it often the page becomes annoying).

3) There is no way of backing up to an installable xpi (yes, someone else has mentioned this - I mention it again because it would be VERY useful - just drag the xpi to a fresh Firefox install, and you're done - no first installing FEBE, then restarting, then creating a new profile, restoring to that profile, and then restarting using that profile).

But despite those (perhaps minor) complaints this is, at the moment, the best Firefox backup extension available.

This review is for a previous version of the add-on (7.3.0.1.1-signed).