Warning: This will wipe all data. Amazon does not support this. You assume all risk.
Example brief install note (template)
For two years, users accepted the sluggish UI, the inability to change the launcher, and the walled-garden approach of the Amazon Appstore. But then, the developers over at XDA-Developers did something magical. They cracked the bootloader. amazon fire hd 8 10th generation custom rom extra quality
: Late 2021 units have different touch controller (Cypress vs. Goodix). Check dmesg | grep touch before flashing. Flashing wrong kernel = no touch input. Warning: This will wipe all data
: For technical users who want to turn their Fire HD 8 into a mini Linux computer rather than an Android tablet, PostmarketOS supports various Fire models and can be used for light coding or server tasks. Installation Prerequisites users accepted the sluggish UI