Game is not playable in Firefox browser [PC]

[mvaligursky]

Camera blackscreen with the latest firefox version (120.0)

It seems to be a Firefox issue, see more here https://forum.playcanvas.com/t/back-screen-in-latest-firefox-version-120-0-playcanvas-version-166-3/33964 and The Firefox team is busy investigating, see their linked ticket.