It's the same as the password manager in Internet Explorer, although I would trust any Mozilla product security-wise, before any microsoft product. You also have the option of clearing all saved password lists at the end of a session if you want.
Fujitsu Lifebook P727 laptop review
Microsoft Paint set to die after 32 years
Mac power user tips and hidden tricks
Comment désactiver la saisie intuitive et paramétrer votre clavier ?