Facebook now combines "Like" button tracking data with data from Facebook itself to get [ even more information about people's digital activities ]( https://www.eff.org/deeplinks/2014/10/facebook-increases-its-tracking-reach-atlas-and-users-have-little-choice-about-it ) . Facebook does not tell other companies the identities of users, but they can identify users based on data they get elsewhere. "Like" button surveillance even [ tracks people who are not useds of Facebook (i.e., never had a Facebook account). ]( https://stallman.org/archives/2011-sep-dec.html#14_October_2011_%28Facebook_Like%29 ) However, you can block "Like" button tracking with the GNU browser, [ IceCat ]( http://www.gnu.org/software/icecat ) .
Ссылка: https://stallman.org/archives/2014-jul-oct.html#13_October_2014_%28Facebook_to_get_even_more_info_on_digital_activities%29