I can't tell, things like BespokeSynth are running ok with alsa or jack. I got the rt kernel, made a few things to audio priority, fiddled with governors, but no luck. Let's say that it happens quite quickly with the Stitch Angel fast trance example "the key needs to be G" supersaw synth.
Chromium is better at it than Firefox though.
Maybe this 5800X3D needs a buff up...