how can i create theme for android

hello Mozilla team ! straight to the point ; This is my now "live" theme https://addons.mozilla.org/en-US/firefox/addon/iso-dark-theme/ Have created theme based to browser Firefox (changed colors.. in manifest.json) ... but i don't know how edit in android firefox browser colors ... now then i apply my theme to android with firefox latest installed , theme is still the default... there only is in addons : Disable or unistall ... :/ What code i need to use , 'couse i didn't find anything on google search that be mentioned how to do firefox theme to android ; Please help ?!