2517 Media Capabilities => inactive

see https://github.com/ghacksuserjs/ghacks-user.js/commit/f214e4bc4e69af62a031323142b3645bd0bad340#comments

user.js

@@ -1213,10 +1213,10 @@ user_pref("dom.webaudio.enabled", false);
  * [1] https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent ***/
 user_pref("dom.w3c_pointer_events.enabled", false);
 /* 2517: disable Media Capabilities API (FF63+)
- [WARNING] This *may* affect media performance if disabled, no one is sure
- [1] https://github.com/WICG/media-capabilities
- [2] https://wicg.github.io/media-capabilities/#security-privacy-considerations ***/
-user_pref("media.media-capabilities.enabled", false);
+ * [WARNING] This *may* affect media performance if disabled, no one is sure
+ * [1] https://github.com/WICG/media-capabilities
+ * [2] https://wicg.github.io/media-capabilities/#security-privacy-considerations ***/
+   // user_pref("media.media-capabilities.enabled", false);
 
 /*** 2600: MISCELLANEOUS ***/
 user_pref("_user.js.parrot", "2600 syntax error: the parrot's run down the curtain!");