This FireOS device requires you to use ADB to provide this permission

1. Enable ADB on your device:
   1. From the home screen of your Fire TV, select Settings.
   2. Select My Fire TV > Developer Options.
   3. Turn on ADB Debugging.
2. Setup ADB on your computer (Note USB drivers are not needed since we use network connections)
   • Linux: sudo apt-get install adb or download the zip file and install
   • Windows: Download the zip file and install
   • Mac: Download the zip file and install
3. Connect to your device using adb connect IP_ADDRESS
   IP_ADDRESS is the ip address of your FireOS device.
   You can find your device IP address from Settings -> My Fire TV -> About -> Network
   The first time you connect, your Fire TV will ask on-screen if you should allow this connection. Enter "yes and remember this device".
   You may need to run the adb connect IP_ADDRESS a 2nd time if it took you a while to do the last step.
4. Run the needed commands (via adb shell)
   
   adb shell appops set com.videostorm.irusb SYSTEM_ALERT_WINDOW allow
   
   
5. Disconnect with adb disconnect