Firefox: Remember All Passwords

From cybernetnews… you can make it so websites can’t override the password saving feature in Firefox. Edit the file nsLoginManager.js, and modify line 770 to return false all the time.

    _isAutocompleteDisabled :  function (element) {
        if (element && element.hasAttribute("autocomplete") &&
            element.getAttribute("autocomplete").toLowerCase() == "off")
            /** Change this line to be return false **/
            return false;

        return false;
    },