it's worked in Firefox for a while. Well, more like I'm not personally aware of any instance where it didn't work in Firefox, but I can't say it never didn't.
Push to talk only works on Firefox (or probably Chrome too but I don't use Chrome) if you're clicked on the browser, however. But AFAIK with Wayland that's just the case in general with Discord
I think I started around that time. I recall accidentally installing Slackware in Portuguese then having to learn both Portuguese and Linux to fix it. Wild ride.