Source, earlier: https://www.facebook.com/help/messenger-app/804132271957789 https://www.facebook.com/help/messenger-app/804132271957789 (https://news.ycombinat

Source, earlier: https://www.facebook.com/help/messenger-app/804132271957789 https://www.facebook.com/help/messenger-app/804132271957789 (https://news.ycombinator.com/item?id=47042390 https://news.ycombinator.com/item?id=47042390)