WebRTC and Firefox 119 on Mac OS Sonoma 14.1

I’m testing a WebRTC solution on the a.m. system and experiencing very bad results with FireFox 119. All other browsers on my system (Chrome, Safari) don’t show these problems:

– Sluggish video

– Long delay

– High latency

– Drop outs

– Low framerate.

The video is hard or software encoded H.264 from various sources. I’m wondering if this could be a problem with the OpenH264 decoder (which has been updated today, as I have learned).

Generally I have a lot of problems with Firefox on Sonoma, so it could also be some other thing between Firefox and Sonoma.

In contrary I fired up my old iMac 27 with High Sierra. After several updates Firefox went from 109 to 115. There is no such an issue in this system.

Can anybody confirm?