If you mean starting Firefox only with a password, I don't think that is a possible option. However, there is a '''Master Password''' option in the password manager. Once set, the password manager will only fill in user / password data '''AFTER''' the master password has been entered. Otherwise the browser works normally. <BR><BR>'''Firefox Options > Security.''' On the bottom look for '''Use Master Password.'''<BR><BR> '''W A R N I N G ! ! !''' If you forget the master password, there is no way to recover it.