I didn&#x27;t have to turn this on. It&#x27;s in Content section by default...<p><a href="https:&#x2F;&#x2F;support.mozilla.org&#x2F;en-US&#x2F;kb&#x2F;enable-drm" rel="nofollow">https:&#x2F;&#x2F;support.mozilla.org&#x2F;en-US&#x2F;kb&#x2F;enable-drm</a><p>media.eme.enabled to false to disable EME if you want to tweak the config.