Simulcast not working (Mozilla Firefox)

The simulcast on the consumer side is working fine in Google Chrome, But it is not working in Mozilla Firefox. The resolution of video is stuck at 720p in firefox. Could you please tell me why it is not working in firefox? I have deployed the project. Could you please check the url - https://vofoxtest.tk:8888/ ?

I’m afraid you should provide much more accurate description of the issue. “The resolution of video is stuck at 720p in firefox” tells absolutely nothing about the issue. Please read the doc, check the consumer “layerschange” event, check how may streams/layers the producer is sending, the consumer available bnadwidth, etc etc, and open a new topic with the full description of the problem.