That is a different thing. That is a browser function to store your credentials and be able to auto-fill them later. Opera does it nicely by displaying a bar on

That is a different thing. That is a browser function to store your credentials and be able to auto-fill them later. Opera does it nicely by displaying a bar on top of the screen after you submitted. So you can actually see if you logged in and then decide to store and not to store. This submission is about server-side (cookies or likewise) though.