Hey man---- try this app out for your Android to cast. It can cast to pretty much anything https://play.google.com/store/apps/details?id=com.tuxera.streambels Also, Roku has an android app to stream from your mobile device https://play.google.com/store/apps/details?id=com.roku.remote Links are straight from playstore. As for firefox on the TV, dont know make/model of it. Give some more details like phone make/model/carrier etc. Take a look Here---> https://developer.mozilla.org/en-US/docs/Mozilla/Firefox_OS_for_TV Mozilla has an OS for smart tv. Hmu anytime loaded with plenty of knowledge and experience