This is sad, because as far as I know the only only browser with Tor support is Brave (desktop only) and its Tor implementation is not as good as Tor Browser.
Discussion
If you use Proton VPN you can get Tor support on any browser.
Didn't know that, thanks.
There still needs to be privacy stuff implemented inside the browser, mostly to do with how JavaScript is allowed to have access to user events and use callbacks to pass this information back to the server. Google is abandoning cookies now and moving to a user profile based system that doesn't use or need user consent. The routing part of Tor only partly mitigates against that.
Brave's CEO is actually the former Mozilla CEO, so he's absolutely the reason Firefox is dying.