Eats bookmarks. Rated 1 out of 5 stars

If you value your bookmarks, don't let this thing near your computer. It simply gobbles them after a few uses, and like the other reviewer said, you can't delete the empty shells. You have to re install Firefox! It's more cumbersome, but you can find these cookies with the windows search. Just plug in *.sol, then you can delete them yourself. At least you'll keep your bookmarks.

This review is for a previous version of the add-on (1.22). 

Once again I rechecked the code but

there is nothing that could cause such a desaster.
This addon does not even touch the bookmark-system. Whatever caused your troubles, you should try to find out - but you'll find also that BetterPrivacy was not involved.