Lost root access functionality on Fire?, get it back with BurritoRoot2(Kindle 6.2.2 Root), courtesy of Justin Case. Recently Amazon release Kindle Fire 6.2.2 software update, if you have upgraded to this firmware then you will have to root the device again, for this you can download BurritoRoot2, you can easily root the Kindle fire 6.2.2 with ADB(Android Debug Bridge). Download Kindle 6.2.2 Root file and step by step instructions are given below.
RUN Android Debug Bridge: Get help here
Download Root file for 6.2.2 update – Download link [Thanks Jcase]
Download SU and Superuser apk.
Now type the following commands in adb to install and root Kindle Fire 6.2.2
adb push BurritoRoot2.bin /data/local/
adb shell chmod 777 /data/local/BurritoRoot2.bin
adb shell /data/local/BurritoRoot2.bin
adb shell id
<if uid = 0 continue, if not start over>
adb push su /system/xbin/su
adb shell chown 0.0 /system/xbin/su
adb shell chmod 06755 /system/xbin/su
adb install Superuser.apk (skip this step if its already installed)
If you don’t want to root Kindle Fire this way then a pre-rooted firmware build is also available at XDA.
Download Pre-rooted kindle fire update – Link 1 secure | Link 2 unsecure