Firefox - if you don't use DRM and have no plan on ever using or enabling DRM, disable the pop-in which occurs when visiting any DRM-infected website by adding to your user.js / prefs.js (about:config)

  user_pref("media.gmp-widevinecdm.enabled", false);
  user_pref("media.gmp-widevinecdm.visible", false);

#firefox #opensource #linux 

 Did you know about https://github.com/arkenfox/user.js ? It has many other useful settings 

 Aye I do, I keep hundreds(?) of settings in my own git server repo, just posting selected snippets here and there in bite-sized chunks for nostr notes.