I think people on the interwebs are confusing the smoke for the fire.
For those that haven’t read how the new EME/DRM stuff will work: Firefox will have a sandbox to run the binary blob. The blob will not come installed on Firefox. The blob will not have access to the hardware or be able to fingerprint you. The sandbox is open source and can be compiled separate from Firefox so that people who want to make sure their sandbox has not been tampered by NSA/MAFIAA will be able to do so.
If you don’t use services that use DRM such as Netflix, Hulu and Amazon then your Firefox will still be free from the evil binary DRM blob. If you decide to utilize such services then you authorize (explicit user action, like press a button and there is a message) the installation of the binary blob at the time you try to use the said services.
“As plugins today, the CDM itself will be distributed by Adobe and will not be included in Firefox. The browser will download the CDM from Adobe and activate it based on user consent.” — Andreas Gal, Mozilla CEO in Reconciling Mozilla’s Mission and W3C EME
If you’re among the group that is against DRM on the web then instead of going into flamewars and hatred about Firefox having the EME spec you should just stop using DRM enabled services and show them where your convictions are. If on the other hand you want to consume said content then you will have the only open source sandbox that protects you agains hardware access and fingerprinting. Firefox still the best alternative even with EME/DRM.