Have you tried another browser? It may not be firefox error

Works fine for me in the current release.

It looks that this done via a websocket (wss://stream.binance.com/stream) if I check this in the Web Console and Network Monitor.

You can check the Web Console for websocket related messages.

You cant try to toggle this pref on the about:config page to see if true or false makes a difference (both work for me).

• network.http.spdy.websockets

You can also check other websocket pref to see if they are all default.

See also this question:

• /questions/1331999 Live graphs in some websites have stopped auto updating

network.websocket.timeout.open = 100  :)