I use one website with a userid and password. Because of the password encryption on that site, Firefox thinks the password changes every time I use it and asks me to either 'Update Password' or 'Don't Update'. If I agree to update it changes the saved password to an encrypted value and the login fails next time I go to the site. I do want to keep the password saved for the site. But I don't want this prompt every time, can I stop it just for this site?

Many Thanks