Ah yeah, Firefox is GTK too, and annoyingly hides xdg behind a setting. I apologize in advance as my knowledge here is bit limited, but if firefox is installed with RPM, I think you'll need xdg-desktop-portal-kde
installed, then in firefox's about:config set widget.use-xdg-desktop-portal
= true. I'm not sure how it works with flatpak though.
But hopefully that helps, best of luck!
Mm mmhmm, yes. I see. Must have a vitamin deficiency then. Have you tried fish oil?