WebRTC based applications don't work (Firefox behind proxy)
OS: Windows 10 1809 LTSC Firefox Version: 89
Firefox is behind a proxy and I have problems with applications like BigBlueButton and DFNConf(Pexip), which using WebRTC.
about:webrtc shows problems with ICE. It seems Firefox doesn't use the proxy config properly on this step. The Proxy is set via GPO.
Testing with other browsers show that there is no issue with webRTC. Only firefox doesn't work.
Is this still a bug or should I try some other configurations?