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http://macdailynews.com/2018/06/12/the-18-things-you-may-not-realize-facebook-knows-about-you-firm-reveals-the-extent-of-its-spying-in-a-454-page-document-to-u-s-congress/
The 18 things you may not realize Facebook knows about you: Firm reveals the extent of its spying in a 454-page document to U.S. Congress