Chrome and Firefox now can "talk"

WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple Javascript APIs. The WebRTC components have been optimized to best serve this purpose. 

WebRTC mission: To enable rich, high quality, RTC applications to be developed in the browser via simple Javascript APIs and HTML5.

The WebRTC initiative is a project supported by Google, Mozilla and Opera.

Google and Mozilla have posted a joint annoucement around achieving WebRTC interop.

Chromium blog post:

http://blog.chromium.org/2013/02/hello-firefox-this-is-chrome-calling.html

Mozilla hacks blog post:

https://hacks.mozilla.org/2013/02/hello-chrome-its-firefox-calling/

The WebRTC demo call video (Firefox-Chrome demonstration call between Mozilla’s Chief Innovation Officer, Todd Simpson, and Google’s Director of Product Management, Hugh Finnan):