Amazon may not be thrilled – they are selling each Fire at a loss and hope to make their profit from selling users content. This is a victory for consumers, however, who will most likely still want to use Amazon’s services, but not be forced to double-dip on apps they already paid money for.
The method involves connecting you Kindle Fire to a PC and transferring files, which must then be installed in a proper order to the correct directories. You can also install the Google services you would normally find on an Android tablet, including Gmail, Maps, and YouTube. The result is a Kindle Fire that has almost all of the functionality of a normal Android tablet, with Amazon’s UI and content at the same time.
Is it the best of both worlds? If you feel comfortable with rooting and manually installing files on your device feel free to explore the sources for detailed instructions. Remember that this sort of thing generally voids your warranty, so tread carefully!
source: addictivetips via Android Authority