In the context of Master Passwords, can passwords be saved from sites for which no option is given to remember the password?
Do certain websites block the option to remember a password? If so, is it possible to overcome this to enable the password to become encrypted by the use of Master Password?
Wšykne wótegrona (2)
Yes passwords can block the browser from remembering passwords. There may be an addon that can work around this, addons.mozilla.org would have it, but that is a web standard so there isn't a real way around it (most commonly banks do this)
Website can use autocomplete=off to prevent Firefox from saving and filling the name and password.
You can remove autocomplete=off with a bookmarklet to make Firefox save the name and password.