You can now root the Amazon Fire 5th Gen 7" Tablet running the latest update to Fire OS 5.3.1. Rootjunky has updated his SuperTool to get the job done! Rooting your Amazon Fire 5th Gen Tablet is as easy as one click. There are several other options included in the SuperTool. You can install your adb drivers, install the Google Play Store and remove ads from the lock screen, block OTA updates, install TWRP recovery, and much more. Grab the updated SuperTool from the link below.
via RootJunky.com