going downhill Rated 1 out of 5 stars
Two big problems with this add-on:
1) The password sync feature is being discontinued with the "suggestion" to use lastpass instead.
However, while xmarks was fairly inobtrusive, lastpass is a behemoth that is always in your face. No thanks.
2) Stability is almost nonexistent. Some time ago it stopped syncing, complaining that I added a password that was excluded in the profile and it will not sync AT ALL until the problem is resolved (no hint of what the password was for, mind you). The web help suggested enabling the password for the profile (by guessing, I assume) but any change in the inclusion/exclusion I tried to make resulted in an "An unknown synchronization error occurred."