For me, root access is a must have for Android devices no matter smartphone or tablet. Same apply to my Amazon Kindle Fire. Why? Check out this article ~ Top reasons to root Kindle Fire to know more. Having Kindle Fire Software Update 6.3 now and lost root access? No worry, you still can root Kindle Fire Software Update 6.3.
How to root Kindle Fire Software Update 6.3?
Personally, I do not use stock Kindle Fire ROM right now. So I don’t have this OTA update and lose root access issue because I am using custom CM7 ROM. But you can find the way to root Kindle Fire Software Update 6.3 here. Then enjoy all applications and features that require root access.