I just tried today, but I don't know when it started, but all of the streaming services I have access to are not working in Firefox (on MacOS 11.2.2, Firefox 86.0). They give the following errors: Disney+ - Something went wrong. Please try again. If the problem persists, visit the Disney+ Help Center (Error Code 83) Prime - We're experiencing a problem playing this video. For assistance, please go to www.amazon.com/videohelp. Netflix - Pardon the interruption. This title is not available to watch instantly. Pleast try another title. - 1044. Error Code F7121-1331 I've tried multiple videos on each service, all produce the same errors. I've rebooted my machine. I've flushed all cache and cookies. I've tried in safe mode. Youtube and Twitch both work. Strangely enough the "Watch Trailer" on Prime works. On the same machine Chrome and Safari play all services fine. This makes me think it's either a privacy guard setting or a DRM setting. I've also checked my media.mediasource settings and they are all default. Play DRM-controlled content is also enabled. Anyone have any help or other things I can check?