I am working on a project where I have to add several new job postings each day into a data base through a simple web form. Often, the job duration, application due date, city, or company are the same as previous ones. As a shortcut, I simply type in the first two or three characters and scroll through the auto complete list in Firefox.
Occasionally, I press tab too soon to get to the next field and end up submitting a partial value (like ‘4 ‘ instead of ‘4 months’).
Well, I just realised how to delete unwanted items from the auto complete list in Firefox. Just scroll through the list with the down arrow key on your keyboard until the the unwanted one is highlighted. then press Shift+Delete. Voilá! (is that better Cedric)
For IE users, I believe the key combo is simply the Delete key.