安装Sideload Aptoide App Store Onto Amazon FireTV Devices

Install the Downloader application
Launch Downloader
Navigate to https://aptoide.com/
Click Download button
Click the Download APK button
A prompt will display to go to settings and allow installing unknown apps
Click Settings > Install Unknown Apps > Downloader > Toggle the setting to On
Click back a few times to return to the Downloader app
Click Install and then Install again