Forcing firefox to remember password

It happens sometimes that Firefox get messed up with so many stored information in a particular site that it won't remember or ask to remember the password.

I just found a solution, a bookmarklet that will force Firefox to offer you to remember the password.

http://kb.mozillazine.org/User_name_and_password_not_remembered#Using_a_bookmarklet

It says that it works even on sites that explicitly don't want the browser to offer to remember the password. I still have to see if that works well.