Hi What happens when you try to view videos on that site? Is there an error message? Do you have an example of a video that does not play? Do you have any add-ons installed in Firefox?

https://support.mozilla.org/en-US/kb/update-firefox-latest-version?cache=no Did you update Firefox to the latest version? Version 95.0, first offered to Release channel users on December 7, 2021 Version 95.0.1, first offered to Release channel users on December 16, 2021 Version 95.0.2, first offered to Release channel users on December 19, 2021 https://support.mozilla.org/en-US/questions/1359657#answer-1463359 and updated to 95.0. . . . I finally found where the plugin "Widevine Content Decryption Module provided by Google Inc." was not updating to the newest version of December 1, 2021. Ver #4.10.2391.0 cor-el; Make sure you have the latest Widevine version. You can toggle DRM off/on to see if that makes Firefox (re)load DRM components. * Settings -> General: Play DRM * https://support.mozilla.org/en-US/kb/enable-drm You can possibly check the XHR requests in the Browser Console if this doesn't work. * https://developer.mozilla.org/en-US/docs/Tools/Browser_Console