Latest Funai Fire TV 4K (2022) user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 9; AFTMON002 Build/PS7644.3545N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/106.0.5249.170 Mobile Safari/537.36 cordova-amazon-fireos/3.4.0 AmazonWebAppPlatform/3.4.0;2.0	Chrome Webview 106	Fire OS 7
Mozilla/5.0 (Linux; Android 9; AFTMON001 Build/PS7664.3772N; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/112.0.5615.197 Mobile Safari/537.36 cordova-amazon-fireos/3.4.0 AmazonWebAppPlatform/3.4.0;2.0	Chrome Webview 112	Fire OS 7