flatpak listflatpak run org.mozilla.firefox?
flatpak install org.mozilla.firefox or just open the discover store (or whichever the gnome equivalent is) and search for firefox?sudo mount -a to mount everything in fstab

ostree-image-signed:docker://ghcr.io/ublue-os/bazzite-deck-gnome:39
flatpak listflatpak run org.mozilla.firefoxmitch@bazzite:~$ flatpak run org.mozilla.firefox
error: app/org.mozilla.firefox/x86_64/master not installedflatpak install org.mozilla.firefoxsudo mount -aostree-image-signed:docker://ghcr.io/ublue-os/bazzite-deck-gnome:39