Earlier quoted context omitted.
The openness of the browser has nothing to do with it, the browser provides an interface to the DRM mechanism which could be open or closed source. Open source browsers like firefox already support proprietary plugins such as Flash. If anything this makes Linux support easier, because you no longer have to provide support for an entire virtual machine and all APIs such as Flash or Silverlight. The only software requi…
The DRM mechanism can't really be open source. You could simply change it to write the unencrypted video data to the disk if it were. A plugin DRM module will also have to do all of the video rendering and displaying. Because if it just hands the unencrypted stream back to the browser then you could change the browser to simply write it to disk. The relevant DRM mechanisms will come from Apple, Microsoft, Google, and…
EME means you rely less on Adobe code than you did previously as they are no longer shipping an entire runtime, just the content protection module.