I can also advice some useful addon for FF - Secure Login.
"Its main feature is similar to Opera's (the browser) Wand login".
Code:
some additional functionality:
# Prevents malicious JavaScript code to automatically steal your login data.
# Provides an option to protect your login data from all JavaScript code during login.
# Websites requiring JavaScript for the login process can be added to an exception list.
# Can prevent cross-site scripting (XSS) attacks
to steal your passwords without having to deactivate JavaScript.
# Helps to protect you from phishing.