Vince

Don't worry, just run: `./install.sh -l -c Light` it'll make one

I need the icon name or ID

This app use specified icon: `Icon=/opt/pt/art/app.png` do not use icon themes

Those buttons minimize size is 16px, and metacity-1 theme is for cinnamon desktop

Not gtk theme issue, what firefox theme you are using ?

It looks great!

Choose another folder outside the source folder

`sudo flatpak override --filesystem=xdg-config/gtk-3.0 && sudo flatpak override --filesystem=xdg-config/gtk-4.0`

Fixed

Run `./install.sh -c light -l -f` to use only light version