Use Firefox, and my advise use the Firefox from another computer. I had a similar issue with my computer and turned out that for some reason my firefox keeps on sending or requesting a secure encryption/channel.
Chrome with WEBRTC does not work at all for me although it was upgraded to the latest version.
Oh and by the way if you happen to have upgraded the ubuntu after the 8th of Jan then it is likely that WEBRTC will not work for you. I have posted an issue earlier about this.