FIRMWARE
Fire TV Stick 4K Max - 1st Gen (2021)
- Fire OS 7.2.7.3 (PS7273/2625) (code 22851240324, bundle com.amazon.kara.android.os)
https://d1s31zyz7dcc2d.cloudfront.net/dc64e6a705f8e840217c98b2217938f2/update-kindle-kara-PS7273_user_2625_0022851240324.bin