I like the fact that you can store usernames / passwords in the browser, but I noticed that if you want to change or delete this stored form data from even one website, then you have to delete ALL saved usernames / passwords.
I've noticed this as well, and it's a problem for me. I mistyped the user name to one website I frequent and it saved the user name. Now whenever I go there it remembers the wrong user name and I have to fix it, which is okay but annoying.
Maybe there's a file that contains usernames and passwords that can be modified?