If you are using the automatic form fill, can you not just remove the information for that form and re-enter it again?

Here's what happens. I go to a site like, say, gmail. for username, I write alfonse, then I hit tab and do the pw. I've told Firefox not to remember the pw because more than one person uses this machine. One time, in a hurry, I thought I'd hit the tab but hadn't and typed my pw on the end of the username: alfonse#####. So now when I sign in, once I write a, it doesn't automatically fill in the rest of the line. It gives me two choices: alfonse or alfonse#####. Needless to say, I don't want the mistake with my pw coming up. I want to know how to eliminate that, but still have Firefox autofill the correct sign-on when I start writing it. I'm not sure what you mean by "automatic fill form." Selecting the unwanted autofill, highlighting it and hitting delete doesn't get rid of it for the next time.

Go to your profile page and display the ID and password that is wrong, then delete it. Next time enter the correct ones and SAVE. Tools -> Options -> Security Click on [Saved Passwords]. Highlight and {Remove} what you do not want. If you have a master Password, you willneed it to display the passwords.