how to eliminate auto fill for logins
The tools on firefox does not have: Tools -> Options, Security tab, uncheck "Remember passwords for sites".
or
Tools -> Clear Private Data, check "Saved Passwords".
Alla svar (1)
Menu differences: Windows: Tools > Options - Mac: Firefox > Preferences - Linux: Edit > Preferences
- Firefox > Preferences > Security: Passwords: "Remember passwords for sites"
If the password manager is disabled then the user name may be saved as form data:
- Firefox > Preferences > Privacy > History: "Remember search and form history"
You need to remove passwords that you have already saved.
Firefox > Preferences > Security: Passwords: "Saved Passwords" > "Show Passwords"
See also http://kb.mozillazine.org/Deleting_autocomplete_entries