Its even worse when you force Firefox to use wayland its icon doesn’t even show.
Edit: Oh since everyone now is confused; I only have the flatpak version of Firefox installed yet it doesn’t use the pinned icon and doesn’t even use the firefox icon under wayland at all.
It wastes resources on the consumer side to free up resources on the developer side, allowing for more time spent on improving the software instead of worrying about millions of different system setup combinations.