Is there a way to join the hosted version without having to sign in?
EDIT found it:
> While we’re investigating options for semi-anonymous or pseudonymous connections, we will require authentication, because:
> The Mozilla Community Participation Guidelines will apply, and they’ll be enforced.
http://exple.tive.org/blarg/2019/04/26/synchronous-text/
(Don't ask me why the article seems to pretend IRC has to be unauthenticated)
Besides, you already are a part of Mozilla. Or you can be: check out the bug database, submit a patch, and we'll happily land it. :-) Until you've been around long enough to land it yourself; commit privileges are not tied to employment.