Earlier quoted context omitted.
Yes, I expect such thing to surface, but it would be nice if Mozilla could provide such options on their own too. That would be some small positive gesture towards those who don't appreciate their move and see it as a betrayal of Mozilla's core values. It would as well make this issue more apparent. Doesn't Mozilla care about educating the public on such matters? It surely would be a positive thing for the Open Web.
As the blog post mentioned, the EME stuff will be an option that the Firefox user would need to agree to install. That would be an opportunity to educate users on the topic, I think.
If there would be build switches to disable that, I'm sure Linux distros with similar to Debian policies will ship versions where it will be disabled altogether.