Mozilla, the folks who develop the Firefox browser, have bundled Chromecast support into the latest nightly build for Android. Users of the popular browser can cast tabs or videos from an Android device to any Chromecast on the same local network, using the Tools > mirror screen section in the browser settings. Be warned that this is a nightly and is pretty rough around the edges.
If you understand this and want to give it a try anyway, you'll find the latest build at the Firefox nightly page.
Via: +Lucas Rocha