what divestOS is actually saying:

While DivestOS includes a Gecko based browser for privacy reasons, Chromium based browsers have many security advantages. It is up to the user to choose their preference.

https://divestos.org/pages/browsers

https://github.com/mumble-voip/mumble-docker

myself, I run a docker container of mumble in casaOS

something you can try https://github.com/ValveSoftware/csgo-osx-linux/issues/3282#issuecomment-1969271416

For me putting the gaming monitor higher on the virtual canvas made them launch on that monitor.