how do I clear old form data?
When you're filling in forms, as you enter the first letter, all options beginning with that letter appear - allowing you to select one rather than type in an entry.
Some of those drop down suggestions can get pretty long. How do you remove entries - or clear them?
Todas as respostas (1)
From : http://kevmarl.com/2008/10/20/how-to-delete-a-single-saved-form-data-entry-in-mozilla-firefox
Click on the test entry box form where your data is. Press down till you get to the incorrect/old/unwanted entries. Press shift+del. Repeat for all others. Viola!