Installing third-party apps on an Amazon Fire TV Stick 4k can be done by enabling the option to install apps from unknown sources. However, it’s important to note that installing third-party apps can put your device and personal information at risk and it also may void the warranty of the device. Here are the steps to install third-party apps on your Amazon Fire TV Stick 4k.
1. From the main menu hover over to the settings tab and press select
2. Now click on the My Fire TV on the bottom left
3. Click on Developer Options
4. Click on Apps From Unknown Sources
5. Now choose Turn On
Now visit my Downloads page and click on the apps that you would like to install