Why does peacock streaming not play on Firefox browser

The UserAgent you used to post this thread appears to be Mozilla/5.0 (Windows '''NT 6.2'''; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0 The NT 6.2 is Windows 8 and this leads me to think you are running Firefox in Windows 8 compatibility mode for some reason on Windows 11. You need to uncheck Rin this program in compatibility mode for Windows 8. https://www.minitool.com/news/how-to-run-a-program-in-compatibility-mode.html If you then do an internal Firefox update you will likely get updated to the current Firefox 140.7.0esr. If you prefer to have the current Firefox 147.0.2 Release then see https://www.firefox.com/download/all/