Rated 5 out of 5 stars

Does exactly what it says it will. And is significantly more stable on my systems than PassIFox (which I used for a good few months before moving to KeeFox).
Having the username selectable on an HTTP Auth dialog box is a stroke of genius, and immediately places this extension above any of the others which intergrate KeePass with Firefox.

This review is for a previous version of the add-on (1.0.2.1-signed).