I have not tried it. Web viewers come back as Safari 5.0. I would like to think this is possible. Hope this helps in some way.
Sadly no - Safari does not allow WebRTC without a plug-in. In raw mode (i.e.a Safari browser) the WebRTC and JABBER connections fine - but it appears that the WebViewer is not the complete version - as it does not allow the WebRTC or XMPP protocol to be delivered.
Thanks any way bigtom