Does Facebook track your web browsing history?

[Ben]

Facebook won't post anything without your permission (your friend gave Pandora permission to post the current song at some point, even if she didn't read what she was giving it permission to do). But it's very difficult to stop Facebook from tracking you altogether. Every website with an embedded Facebook like button sends a message to Facebook to load the button, and that request includes enough information for Facebook to be able to match your website visit to your Facebook account, especially if you're still logged in to Facebook.