Fifefox has a very convenient auto-complete function when filling in forms and logins. Very convenient, until you somehow manage to mistype one of the fields (obviously, you never ever mistype, but some people do…). This mistake haunted me for long enough to get me motivated to solve it.
Apparently, the solution is very straightforward: just highlight the “wrong” value in the drop-down and hit Shift+delete to get rid of it.
