FireOS 5.3.1.0 source code released

The source code for FireOS 5.3.1.0 has just been released:
http://ift.tt/1QaRhRW

Quote:

Fire (5th Generation) Fire_7inch_LC_5.3.1.0.tar.bz2

Attempting to downgrade to an earlier version will most likely result in bricking your device (not yet confirmed).

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