Flatpak
For making sure themes are correct inside Flatpak applications:
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1 # TODO: Figure out which repository these belong to
2 flatpak install org.gtk.Gtk3theme.Breeze-Dark org.gtk.Gtk3theme.Breeze
Setup
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1 # Install flathub
2 flatpak --user remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
3 flatpak --user remote-add --if-not-exists kdeapps --from https://distribute.kde.org/kdeapps.flatpakrepo
Interesting apps
Building
Repositories
KDE/flatpak-kde-applications: Official KDE repository for Flatpak-distributed applications