I don’t want Facebook to store my every move. But guess what Facebook tracks your data even when you are logged out. Kind of scary that all of my data is getting stored in a database and people can access it without my permission.
To experiment this yourself, create few fake Facebook accounts. After using them for some time, you will find that Facebook will suggest you your real account as a friend. This is a proof that Facebook knows that all accounts are coming from the same browser, even after you are logged out.