Facebook's new features secretly add apps to your profile

Tabbed browsers, like IE7, Opera, Firefox and Chrome are wonderful things, but dangerous if you use Facebook, for that social networking business is now shoehorning business apps into your profile if you do so little as log into Facebook then visit another site while Facebook is still open.

MacWorld adds:

You don't have to have a Facebook window open, you don't need to be signed in to these sites for the apps to appear, there's no notification, and there doesn't appear to be an option to opt-out anywhere in Facebook's byzantine privacy settings.

OK, from now on, I will use one web browser (Chromium? Firefox? IE?) to visit Facebook, purge its cookies and cache on every shutdown, and my favorite browser (Chrome) to browse to everywhere else. That will keep Facebook in its place.