Just a second...

WebSocket limitations

WebSocket is an Internet Engineering Task Force (IETF) protocol used by Diffusion™ Cloud to provide a full-duplex communication channel over a single TCP connection. It is not supported by all browser versions.

Table 1. Support for WebSocket
Version WebSocket support?
Internet Explorer® 9.0 and earlier NO
Internet Explorer 10.0 and later YES (see note)
Firefox® YES
Chrome™ YES
Safari® YES
Opera® YES
iOS® YES
Android™ YES