How can I install AirVPN on an Amazon Firestick?

To install AirVPN on an Amazon Firestick, you need to sideload the application since it's not available directly through the Amazon Appstore. First, go to your Firestick settings and navigate to "My Fire TV" > "Developer options." Enable "Apps from Unknown Sources". Then, using the Downloader app which you can get from the Appstore, download the AirVPN APK from a reliable source online by entering the direct URL for the APK. Once downloaded, open the file and install it. After installation, launch AirVPN, log in with your credentials, and connect to a server of your choice to start using the VPN service on your Firestick. Remember that sideloading apps outside the official store might pose a risk, so ensure you trust the APK source and have a valid subscription to use AirVPN legitimately.