I wanted to buy a Firefox os phone, but every phone I searched is low specification phone, so I would like to remove android os and install Firefox os in it

A customized tablet for Firefox OS is recommended to slightly advanced users since it can result in data loss. *[https://developer.mozilla.org/en-US/Firefox_OS/Building_and_installing_Firefox_OS] There was one for a tablet program called flat fish however I cannot guarantee exact steps on how to do this: [https://github.com/flatfish-fox/flatfish-kernel]