Similar issue to the other posters. Firefox doesn't support streaming from amazon, netflix, or disney+. I have windows 10, a PC, an updated version of the browser, DRM content is allowed, and my widevine plugin has been updated as of today (12/10/23). Disabling all of my extensions did nothing to help. I can stream on apps and other browsers. Please work on a fix soon, or let us know what to do. Thanks.