How to Sideload Apps on the Fire TV and Fire TV Stick
Amazon’s Fire TV and Fire TV stick technically runs Android…but you wouldn’t know it from looking. Amazon has a wall of content for its set-top box, and doesn’t want Google (with its own competing platform) to crash the party. But even though the Fire TV only has official access to Amazon’s Appstore, you can install other apps too.
Network Wait Party Apps In Settings Settings Device About Network Network Highlight Cloud Enable Third Party Apps Developer Options
Source: howtogeek.com