Facebook says it shared user data with 52 hardware and software firms, including some Chinese companies. The admission came in a 700-page document dump to the House Energy and Commerce Committee, which released the information today. The list includes major tech companies like Amazon, Apple and Samsung. It also includes four Chinese firms that have been flagged by U.S. intelligence as national security threats. Facebook said it had ended its partnerships with 38 of the 52 companies and will close the rest within the month.
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