Translation: Netflix successfully lobied DRM into what is supposed to be the OPEN web standard, to the point where even Firefox couldn't afford not to support it. Dark days for the free exchange of information enabled by the web.
Here's the bottom line: browser makers have absolutely zero leverage over DRM. Firefox refusing to implement DRM would have been 1000 times more likely to lead to Firefox's irrelevance and death than it would lead to rightsholders caving on DRM requirements. Even if all browsers banded together and refused, all that would mean is that premium content would not be available in browsers, and that would lead to a significant devaluation of the web in favor of proprietary apps. It is a techno-centric fantasy to think that browser makers have even a modicum of leverage here. The fact is content producers would restrict themselves to licensed devices in a heartbeat, and they would get away with it to, because at the end of the day, people want to watch what they want to watch.
EME is a ideological compromise, sure, but it's a net benefit to the open web since its scope is small and it maintains the overall schema of web standards. It shouldn't be considered worse than proprietary plugins with arbitrary scope.