The HD8 10th Gen uses a MediaTek MT8168 chipset. The kernel source is a mess. Android 12+ builds currently have broken hardware acceleration, making video playback stutter. LineageOS 18.1 is the verified daily driver.
Since a full custom ROM is not an option, you can use tools like to achieve a near-stock Android experience: amazon fire hd 8 10th generation custom rom verified
– Gives you 90% of what people want from a custom ROM (Google apps, custom launcher, no ads) without bricking your device. The HD8 10th Gen uses a MediaTek MT8168 chipset
: Use the Custom Launcher tool to install Nova Launcher or Microsoft Launcher . This replaces the Amazon home screen. LineageOS 18
First, verification of feasibility: The Fire HD 8 (10th gen, codenamed Onn ) is powered by a MediaTek MT8168 chipset. Unlike many modern tablets that enforce permanent bootloader locks, Amazon’s implementation on this device has a critical vulnerability—or feature, depending on perspective. The bootloader is technically lockable, but Amazon does not provide an official unlocking method. However, the development community (primarily on XDA Developers) discovered a hardware-based exploit using the kamakiri and amonet tools, which leverage a bug in the MediaKit’s preloader to force the device into a hacked bootloader interface.