Hi folks,
Firefox developer here.
We received Bug 1928600 - spacedock.info - "Secure connection failed" when accessing the page and diagnosed that it's triggered by SETTINGS_NO_RFC7540_PRIORITIES from RFC 9218 Extensible Prioritization Scheme for HTTP.
What I'm seeing in wireshark is that Firefox is sending this in the HTTP/2 SETTINGS packet, and spacedock.info is sending a GOAWAY with PROTOCOL_ERROR(1).
Is this error coming from the CDN or the target server?
For Firefox users out there, you can avoid it by setting `network.http.http2.send_NO_RFC7540_PRI` to false in about:config.
