Just because it has DRM support doesnt mean you have to use it. Avoid DRM content and this won't affect you.
It's a bit like Facebook saying "if you don't agree to our Terms and Conditions, don't use our service". And their T&Cs are complete bullshit. Believe it or not, some of us actually believe in the freedom to communicate online without corporate surveillance and censorship. In the same way, saying that people who care about their right to fair use (legal in US), personal use of files e.g. transferring between personal devices (also legal), sociable sharing of files with friends (possibly not legal) should simply not have access to public material that can only be encrypted using proprietary DRM software is unfair.
The masses though WANT DRM content
That's a lie used by media companies to excuse DRM, and it's simply not true. The masses want access to their movies, music, e-books and cat memes and they will typically click "Yes" to anything that comes up on their screen to get access to their movies/music/etc. Most users, unfortunately, do not know what DRM is. That does not make them "WANT DRM".
If Firefox didn't support DRM, they would switch browsers to one that did (closed source such as IE
What's the point of a free browser if it encourages the user to give away their freedom? The user may as well use IE, there is no difference.