Firefox saved-form data

Have you ever mistyped your password in the username field and it got saved in the form data, or your form data list has become long and you had to clear all your form data just to remove these selected entries?

Then here is a simple trick to overcome this problem...
Just go to the form field and press the Down key. It will show the list of saved data. Now move to the data entry you want to remove. Select the entry and press Delete .. and its gone :)