On Tue, Nov 6, 2018 at 4:47 AM Daniel Kasak <d.j.kasak.dk at gmail.com> wrote: > > then creating /home/dkasak/.config/gtk-3.0/settings.ini That is probably the issue: GTK+ takes the $XDG_CONFIG_HOME variable into account, which flatpak sets to $HOME/.var/app/$APP_ID/config