Development activity had slowed to a trickle, and the project owner and lead developer is now stepping away. The flagship instance, firefish.social, doesn't seem to be working anymore. It looks like many Firefish instances are planning on migrating to other Misskey forks like Sharkey.
It's a bummer to see this. Firefish had a decent amount of hype around it for a minute, and the UI and feature set are nice.
Seeing these projects fail makes me thankful that Lemmy seems to have "made it", in the sense that it is not going away so easily now.