The Free Software Foundation (FSF) strongly condemns
Mozilla’s decision to integrate Adobe’s proprietary DRM module into Firefox.
According to the FSF, this contradicts the fundamental principles on which the Mozilla Foundation is based.
May 14, Andreas Gal (Andreas Gal), CTO of Mozilla, has declared
that "since the majority of competitive browsers and content industry mastered the W3C EME specification from Mozilla virtually no choice but to follow their example and implement EME, to our users retained access to all the content they like. ”
It's about Encrypted Media Extensions
(EME) providing an API for controlling playback of content in a browser through an HTML5 element