It can't be said for all users. I don't want it. No DRM junk in the browser please. I understand that she probably means some estimated majority, which is unfortunate (i.e. majority accepting unethical practice like DRM).
> Firefox users would need to use another browser every time they want to watch a controlled video
Irrelevant for many users of DRM-free OSes (like Linux) who won't have any DRM backend for EME anyway. I.e. it really sounds like "users would need another OS".
> Each person will be able to decide whether to activate the DRM implementation or to leave it off and not watch DRM-controlled content.
I hope there will be a switch for disabling the whole EME altogether. Even better, I'd prefer builds of Firefox free of any DRM sickness. It's very unfortunate that this garbage is finding its way into the open source browser which always stood for the users' rights more than many others.