And we will shout back : )
I'm already on it as might be seen here.
Feel free to complain loud and clear if it doesn't work in FF. Make it clear that FF support isn't optional.
Also on my to do list: complain even more, including to relevant authorities about Googles abuse of market position to push their browser. Feel free to join me here as well.
(And to be sure: feel free to complain when supposedly mainstream sites doesn't work in any major browser - safari, edge, FF and even Chrome : )