Steps taken from https://support.mozilla.org/en-US/kb/enable-drm#w_troubleshooting Please make sure that DRM content is enabled in the "'''Digital Rights Management (DRM) Content'''" section of ''about:preferences#general''. In ''about:addons'', go to the '''Plugins''' section, and make sure that the Widevine Content Decryption Module is always activated (click on the three dots on the right side) If those do not work, I can provide further steps.