If a websocket server reply with extension permessage-deflate; client_max_window_bits=15 an error happens:

unsupported permessage-deflate parameter: "client_max_window_bits=15"

at
https://github.com/nhooyr/websocket/blob/bd07a64be6809ef46b76fff5ef7263ef7641980f/dial.go#L268-L300