For desktop I recommend you use the arkenfox templates: https://github.com/arkenfox/user.js/ https://github.com/arkenfox/user.js/ For addons in general I recom

For desktop I recommend you use the arkenfox templates: https://github.com/arkenfox/user.js/ https://github.com/arkenfox/user.js/ For addons in general I recommend sticking to this: https://github.com/arkenfox/user.js/wiki/4.1-Extensions https://github.com/arkenfox/user.js/wiki/4.1-Extensions For Firefox on Android I maintain Mull for 4+ years now: - https://f-droid.org/en/packages/us.spotco.fennec_dos/ https://f-droid.org/en/packages/us.spotco.fennec_dos/ - Comparison: https://divestos.org/index.php?page=browsers https://divestos.org/index.php?page=browsers