When using Mozilla, it asks me if I want to Save the passwords etc of sites I use? How do I undo this?

[said]

I don't need to log onto Facebook any more - it's just saved all my data. Even if I log out via FB it will still just open up next time I go on FB. I assume I've clicked the Save option that appears in the top right hand of the page. But I can't see how to undo it.

Anyone know what I mean and know how to help? Thanks

It says "Do you want Firefox to remember this passowrd?" Then you can click 'Remember', 'Never for this Site' or 'Not Now'. I must have clicked 'Remember' by mistake

Excellent! Just done it. Thanks