Some free VPNs that do work on Firestick need to be side-loaded, which is a complicated process for adding third-party apps onto the device. Thankfully, there are a few free VPNs that can be downloaded directly from the Amazon Appstore.
How to get VPN working I bought a subscription to Private Internet Access VPN. Successfully set up VPN on Android phone (Android 6) following their instructions where I also downloaded the OpenVPN Connect app. Works great when I turn on the VPN connection but everything behind the phone loses internet. 59ce067264