Web Audio API support
I definitely love your browser, but there is one problem that make me sad. I regularly use the Yandex.Music service. And Firefox does not support Web Audio API on this site. This leads to the fact that the equalizer does not work on the site. All other browsers I used before (Edge, Chrome, Opera) support this API. The above problem is the only reason I can't use Firefox all the time and with pleasure.
Anything Web support must come from the site FF only can do what the site permits it to do.
Please provide public link(s) (no password) that we can check out. No Personal Information Please !
Did you check the Web Console and possibly the Browser Console for error messages?