Quoting Netflix, from the article: We expect premium video on the web to continue to shift away from using proprietary plugin technologies to using these new Premium Video Extensions. Quoting the article: According to Netflix, Microsoft made this possible by implementing three features in its still-unfinished IE11: The Encrypted Media Extensions (EME) using Microsoft PlayReady DRM. Netflix is using some doublespeak h…
http://hothardware.com/News/Netflix-Backing-HTML5-But-Not-Wi...
And I think Chrome nightlies had the web DRM in place but were not enabled by default? Don't quote me on that.
Anyway, I think Firefox will be forced follow Chrome and IE now to implement DRM in HTML5 video. Firefox does not have the market power it once had thanks to Chrome.
Remember how the whole H.264 in HTML5 support thing played out for Firefox? They were on the side of not supporting it, and Google said it would remove it from Chrome, but that never happened, and Mozilla finally got tired of the effects of "Firefox doesn't support this site's video, let me use a browser that does" and added support.
The same thing is pretty much guaranteed to happen with EME as sites start using EME to stream video and IE, Chrome and Safari add support.