docs: Remove FF warning in readme

And add a note about not removing the event handler so we don't
accidentally break it again.

README.md

@@ -13,9 +13,6 @@ p2p connections in web browsers to facilitate low-latency multiplayer games.
 - [Introductory blog post](https://johanhelsing.studio/posts/introducing-matchbox)
 - [Tutorial for usage with Bevy and GGRS](https://johanhelsing.studio/posts/extreme-bevy)
 
-**WARNING:** This project is in early stages, it has issues with disconnections on Firefox. Make sure to check the [list of
-open issues](https://github.com/johanhelsing/matchbox/issues)
-
 It is currently an all-in-one solution, it comes with:
 
 - A tiny signalling server, [matchbox_server](https://github.com/johanhelsing/matchbox/tree/main/matchbox_server). Written in

matchbox_socket/src/webrtc_socket/wasm/message_loop.rs

@@ -468,6 +468,8 @@ fn create_rtc_peer_connection(config: &WebRtcSocketConfig) -> RtcPeerConnection
         );
     });
     let oniceconnectionstatechange = Closure::wrap(oniceconnectionstatechange);
+    // NOTE: Not attaching a handler on this event causes FF to disconnect after a couple of seconds
+    // see: https://github.com/johanhelsing/matchbox/issues/36
     connection
         .set_oniceconnectionstatechange(Some(oniceconnectionstatechange.as_ref().unchecked_ref()));
     oniceconnectionstatechange.forget();