My favoured browser is Firefox on a MacBook Pro mid 2010 with external monitor attached! It plays embedded video better than any chrome browser I have tried with no jitter! However with certain websites and in particular MSNBC News website, the video stream launches as expected and like chrome browsers takes a few seconds to adjust up the resolution and smooth out jaggies but then the video stops and audio continues! Refreshing the page solves the problem! This does not happen on chrome based browsers (although on my Mac, they don't play embedded viseo as well as Firefox! Using 80.0.1 Any thoughts?