There are less live TV apps on Firestick than for watching movies and TV series. You can download Android APK that work to install on Amazon Firesticks for live TV, though. For the most free channels, I’d have to pick Live Net TV or the Mobdro APK as the best. Note that most VOD and live TV channels provided by free Firestick apps are likely blocked by your ISP if not connecting through your Surfshark VPN app.