Rated 1 out of 5 stars

xmarks kills the human spirit. It is so dangerous it should be banned. It is the worst functioning addon ever and can led to broken keyboards, monitors, and minds. xmarks is the Al-Qaeda of browsers, terrorizing the user with every possible review. Dangerous and immutably destructive.

This review is for a previous version of the add-on (4.0.1).  This user has other reviews of this add-on.