The idea of using a device as wireless headphones isn’t really anything new. Some Roku boxes have a headphone port on their remotes, allowing for a private viewing experience. The Xbox One has a similar deal with the stereo headset adapter, which I use frequently. And now, developer Koush has announced that his app AllCast will feature the same thing for the Fire TV. The video demonstration shows a new button on the screen when streaming to an Amazon Fire TV box.