go to `about:support` and make sure that Window Protocol is wayland, not xwayland.
(it should be wayland because MOZ_ENABLE_WAYLAND is set to 1 by inga-river)
For some reason, while sound in general works fine in firefox (after following the steps from Hardware section),
in WebRTC pages there is crackling much louder than the actual voices, making it unusable for voice/video calls/meetings.
### Chrome
```
doas apk add chromium
```
It should also be wayland by default, but you can check it by `doas apk add xeyes && xeyes`.
In order for screen sharing to work, go to `chrome://flags/#enable-webrtc-pipewire-capturer` and enable it.
Note though that every time you screenshare, there will be two promps from xdg-desktop-portal, one for picking a source, and another for actually sharing.