Try adding the following line to ~/.config/gtk-3.0/gtk.css
* { outline-color: currentColor; outline-style: dashed; outline-offset: -2px; outline-width: 1px; -gtk-outline-radius: 2px; }
Try adding the following line to ~/.config/ gtk-3.0/ gtk.css
* { outline-color: currentColor; outline-style: dashed; outline-offset: -2px; outline-width: 1px; -gtk-outline- radius: 2px; }