Thanks for the information. I cede to most of your points, especially on codecs. :) A few more questions:<p>&gt; Which proves it is possible, and could have been done 5 years earlier to kill off Flash.<p>How would HTML5 video, using OS codecs, kill Flash unless it also had DRM support? Flash has had DRM since 2007 (Flash Player 9).<p>&gt; I think Mozilla is responsible for EME being completely accepted. Before announcing EME support, it was still possible to argue that EME was not supported by all browsers, an admittedly small reason for websites to not use EME.<p>Chrome shipped EME in 2013. Safari and IE shipped EME in 2014. EME content was already live and supported by ~60% of browsers when Mozilla began implementing EME in mid-2014. Perhaps Firefox could continue to lean on Flash and Silverlight to play DRM&#x27;d video.. until content providers decide they don&#x27;t want to continue supporting NPAPI for Firefox&#x27;s small market share. Flash is insecure and Silverlight is on the path to EOL.<p>&gt; The claim was that this was necessary to safe their market share. Well, that didn&#x27;t work<p>Whether EME has any effect on Firefox market share is yet to be seen. It just went live this week. Chrome or Edge users are unlikely to switch to Firefox <i>because</i> they want DRM video to stop working.