Mozilla is adding preliminary support for Casting to our Chormecast device directly from it's browsers.
Few time ago they announced that the famous Mozilla Firefox browser have enabled in its latest mobile version for Android the ability to send the browser tabs directly to our Chromecast bringing a great acceptance among its users millions of users.
When suddenly and without almost letting us breath, they announced the support for the desktop version as well.
So if you are interested in begin playing with it, you'll have to download and install the latest "Nightly" version of ''Mozilla Firefox" that you can find here.
The Chromecast News