When I was entering my username and password on a website, my tabs key was sticky and I wasn't paying close attention, so I entered usernamepassword in the username window and then hit enter. Needless to say, the site didn't accept this alternative, however, my usernamepassword is now an auto-complete option on my laptop for this site. As the security of this site is somewhat important to me, I'd like to remove this drop-down option, preferably without removing all dropdown info on all sites, as it is useful that my firefox knows and supplies correct usernames on many sites I use regularly. Better to have security though, so a clear-all option is acceptable. I've already tried clearing Recent History, which did not disable the new drop-down info.