New nightly build of Firefox Mobile for devices based on the Android operating system has been supported streaming images on Chromecast. This was announced on Google+ Lucas Rocha engaged in the development of Firefox for Android. With this new feature, you can transfer content to the browser via the dongle Chromecast on your TV.
Download the latest version of Firefox nightly build from the official site Mozilla, you can use the new feature. Unfortunately, the function is unstable and often breaks the transfer of images.