I agree that H.264 was not a fight that could be won, considering existing H.264 content and mobile devices&#x27; hardware support. But I&#x27;m sure the situation seemed more hopeful when 40% of the browser market (30% Firefox plus 10% Chrome, at the time) would drop H.264, especially when Google also owned YouTube and On2 Technologies (VP8).<p>Dodging the problem by leaving the codec support to the OS would fragment cross-platform compatibility if websites stuck with a Windows-only codec. Today, Firefox does use H.264, AAC, and MP3 decoders from the OS, but AFAIU doesn&#x27;t expose any other OS codecs to web content.<p>Do you think the current situation with EME DRM is &quot;H.264 all over again&quot;? At least now, we can sandbox the DRM bits and dump NPAPI plugins. EME and CENC commoditize DRM, separating content encoding and DRM. Content providers don&#x27;t need to reencode their video library to add support for new DRM systems.