About a year ago, Amazon pushed an update to newer Fire TV models that made it possible to control the volume of Bluetooth headphones and/or speakers paired to a Fire TV with the Fire TV remote’s volume buttons. At the time, it seemed like only Fire OS 7 devices, like the 3rd-gen Fire TV Stick and 2nd-gen Fire TV Cube, received the new capability. Now it looks like Amazon is finally bringing it to older Fire TV devices running Fire OS 6. At the very least, the Fire TV Stick 4K can now control Bluetooth volume using the remote volume buttons, which was not possible a few weeks ago. Other Fire OS 6 Fire TV models may be gaining the capability as well, but I haven’t had a chance to check, so please let everyone know in the comments if it works for you and which Fire TV model you are using. Thanks to everyone that contacted me about this new update!