I don't use chrome/chromium (also a GTK3 app)
I thought chromium used skia not gtk and did everything itself.
I was under the impression apps (at least on Wayland) needed to be modified to support this behavior.
Well [the merge](https://gitlab.gnome.org/GNOME/gtk/-/commit/2703e420ae9519205cf1b351edcd19b0...) has no documentation so it would be reasonable to assume it all happens inside GTK and no changes are required of the apps?
I'll poke around with the GTK folks to see if I can glean anything further in regard to this behavior with Geany under Gnome/Wayland (no X11 or Xwayland here).
Ok.
GTK3 apps like Firefox and LibreOffice
Don't think they are gtk either, didn't look at firefox but libreoffice has backends based on qt, skia, quartz, win, but not gtk.