i'm trying out flatpak. The only app I have trouble with is firefox. After starting it, it creates 2 icons in dock. They both show the firefox logo but one is more blurry than the other. The blurry one is the one with the blue point on it, indicating I have one instance running. The sharp icon disappears a few seconds after starting firefox. But when I right-click the blurry icon all I can do is close the window whereas I expect to see multiple options like "new window" and such. Likewise clicking this icon with the middle-mouse doesn't do anything.
This does not happen when installing firefox via apt. I get one sharp icon that contains all the expected options upon right clicking. This does also not happen with any different apps I installed via flatpak. They all only create one sharp icon upon starting with the expected options upon rightlicking the icon.