Since browsers on Xubuntu started using GTK3 instead of GTK2, and when saving a file, the dialog for entering a new folder name is white on white and hence unreadable.
I gather this might be changed in
~/.config/gtk-3.0/gtk.css, but I am unsure under what element ID name that would be.
Furthermore, is there a system wide
gtk.css file that solves this issue for all users on this system?