Quick one: You know when you fill a web form in once and it remembers the settings for next time? You know how if you accidentally put your password in the ‘username’ box it means anyone using the computer can then see your password? Frapetastic..

Well, just found out that you can remove them in FF4 (probably others, not checked) by highlighting the offending entry when they pop up and pressing shift+delete.

Handy.