FireFox + Pulseaudio is always using sink 0 instead of default sink(9 in my case)

[Jan Beich]

Andreas Drewke <andreas at drewke.net> writes:

> Hi,
>
> since a few FF updates(do not remember correctly) FireFox with
> PulseAudio always uses sink 0 instead of my default sink 9.
> I am not sure if this is FreeBSD port related or a bug in FF code base.
>
> If you have any questions please ask.
>
> FYI: I can change sink to 9 with "pacmd move-sink-input X 9". This way
> FF playes sound for a while with PA. However I do not know how to make
> this persistant.
> This could also be a bug in PA. I do not know.

Have you tried "pacmd set-default-sink 9" ? Alternatively, remove
~/.config/pulse and let PA pick up default from hw.snd.default_unit.

Firefox can also set PA sink via media.cubeb.output_device in about:config
based on Name from Output Devices in about:support (Media section) but for
some reason it doesn't work here.

https://searchfox.org/mozilla-release/rev/be9f154873f1/dom/media/GraphDriver.cpp#577-590