Comment by nosioptar

You might be able to get Firefox to work with apulse (pa emulation for alsa), i dont know if it still works.

https://askubuntu.com/questions/1387154/using-alsa-on-firefo...

https://github.com/i-rinat/apulse

SeaMonkey may be an alternative. It's closer to what I want than Firefox.

https://www.seamonkey-project.org/