KeeFox Rated 4 out of 5 stars
Works well. Connects my KeePass database to Firefox running under Arch Linux. Could be a little more on the pretty side, but it gets the job done.This review is for a previous version of the add-on (18.104.22.168-signed).
It's been a while since I had time to re-assess the visual appearance of the add-on but with Firefox's visual refresh coming later this year it might soon be a good time. If you have any suggestions about the areas that need improving (or specific ideas to make it look better) please discuss on the help forum: http://keefox.org/help/forum