Every Facebook user has a unique ID number. This number gives you some information on approximately -- but not precisely -- when you and your friends joined Facebook relative to each other. A lower ...

When you sign up for a Facebook account, Facebook assigns your profile with an ID number. Facebook will also prompt you to create your own custom user name, which will display on your Facebook page as ...

Facebook is leaking users' personal information to advertising firms and Internet tracking companies, according to a Wall Street Journal investigation. The information being shared is a user's unique ...