From the article:
Mastodon is a great microblogging platform, but maybe you want to try something new. Firefish made a splash recently, and a lot of people are talking about it. If you’ve played with it for a while and want to officially take the plunge, here’s some tips on moving from your Mastodon Instance to a Firefish one.
That’s profoundly strange, I registered a new account for Firefish.social just the other day without any invite.
It was just after the re-launch with the new branding, though, and their servers have seemed slow, so maybe they had to close signups again?
Also if you’re on Firefish.social yourself, are you able to follow Lemmy communities? I only get an endless spinning wheel and “Processing”, but it works fine on Calckey.world.
I haven’t tried, will give it a shot tonight.
I appear to be seeing the perpetual “Processing” when trying to follow a community.