Firefox add-on to auto insert username and password?

I’m looking for a firefox add-on or something to auto insert my username and passwords on all sites I visit.
I know how to remember passwords with the firefox browser but is there an add-on where I do not ever have to insert anything in the username and password box?
Ta.
Answer #1
Secure Login
https://addons.mozilla.org/en-US/firefox/addon/4429
Answer #2
Try Roboform
http://www.google.com?t=2032590&start=0