https://www.ghacks.net/2017/05/29/chrome-sites-may-record-audiovideo-without-indication/
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https://www.ghacks.net/2017/05/29/chrome-sites-may-record-audiovideo-without-indication/
origin - http://www.pipiscrew.com/2017/05/chrome-sites-may-record-audiovideo-without-indication/ chrome-sites-may-record-audiovideo-without-indication