I tested using the 39.99 Amazon Fire Stick with the Nebula Mars and it works amazingly well. Even using the USB slot for power for the fire stick. (No extra power cable needed).
If the current Operating System for the Nebula Mars was any better, I wouldn’t have to do this.
There might be a nicer way to staple the fire stick to the Nebula Mars rather than having it just dangle out the back.