It could be incompetent team, if they had no FF support at all. But they had and it was working perfect, even better than their hot pile of react native app on linux. But now for some reason they close it, without any explanations.
I guess, they forced to use some "special" proprietary WebRTC layer, for video and audio streaming, which not compatible with FF, and management decided that firefox 10% of users are not worthy to support.
But obviously, they just could not compete honestly, their 4% of browser market is laughable, especially take into consideration their desktop OS share. They have long going plan, to dominate browser market.
Strategy is very simple. If your system browser is chrome based, users would not bother to install chrome. The only competitior is firefox, easily devastated by EEE strategy.
It's not obvious for everyone, but Google started to byte FF. I just can't use google search in Firefox properly, they force me to train their artificial intelligence on each search. Google sites are not locked to chrome-based browsers yet, but they work significantly worse, especially youtube on a mediocre machine.
But in reality, Firefox is the much faster browser. I develop very large webgl web assembly unity game (30Mb of code), and Firefox handles with such burden much better, than chrome.
It's like opera crush. To be compatible with the web, they forced to be compatible with chrome bugs and hacks. After a long time mimicking to a Chrome-based browser, they surrendered to darkness and joined the swarm.
Now the last standing browser is under attack of the giant corporation. If we will not protest, they just swallow us and put onto the glossy walled garden.