Correction to my below message Rated 2 out of 5 stars
This add-on actually works but the description on how it works provided by the author is not precise :-((
As I said below "Connect" message never appears for new sites containing passwords. I have to LOGIN and then LOGOUT manually to make the add-on to memorize the password. After that it seems to be working OK in automatic mode for that site.
Rated 1 out of 5 stars
Does not work with FF 4.0.1. "Connect" never shows up, manually entered passwords never work for their web sites.This review is for a previous version of the add-on (184.108.40.206-signed).