Trying to play Widevine with no Windows Media Foundation (nor Silverlight fallback), see https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows
Yritetään toistaa Widevineä ilman Windows Media Foundationia (ja ilman Silverlight-hätävaraa). Katso https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows