hey - have the same issue right now - what do you mean by legacy firehose? I'm essentially using github.com/MarshalX/atp... Thanks for your help!

So you should no longer consume the firehose on a websocket connection at wss://bsky.social. it should now be on wss://bsky.network - there are some more details about this change here atproto.com/blog/bgs-and...

Bluesky BGS and DID Document Formatting Changes | AT Protocol

The Bluesky AppView now consumes from a Bluesky BGS, instead of directly from the PDS. Also, we'll be updating the DID document public key syntax.