This is an exploit chain for FireTV 2 (2015) (2nd gen / sloane / AFTVS). It contains a MediaTek bootrom exploit and a LittleKernel bootloader exploit.
For installation instructions, see https://forum.xda-developers.com/t/unlock-root-twrp-unbrick-firetv-2-sloane.4222331/
brom-payload includes code from Linux kernel, and is therefore licensed under GPLv2.
lk-payload and modules are licensed under MIT.
See LICENSE.MIT and LICENSE.GPL2 for more details.