Facebook has collected your web browsing habits to target you with ads
Facebook has been stashing away information on your browsing habits when you’re not actually on Facebook.
Yes yes I know everybody does it but I just found a section in FB I didn't know existed… the ad preferences (https://www.facebook.com/ads/preferences/edit/). Go there and you can see some of the things it's collected on you. Of course collection of this information isn't limited to when you're on the site. Any site that has a Like or Facebook button has code tucked inside instructing every site visitor's browser to telegraph their presence to the social network's servers — effectively giving Facebook a log of your web history.
This is why I use https://disconnect.me/disconnect/).and Disconnect (