Is it possible to get Plasma Integration working with the Firefox Flatpak on Kinoite?

I want to use the Firefox Flatpak instead of the RPM, so far I’ve already found a workaround to get it to work along with the KeepassXC flatpak, but I haven’t found how to get it to work with Plasma Integration. I understand it has to do with native messaging but my knowledge is limited. I’ve also found this from the kde gitlab which leads me to believe it should work, but it doesn’t for me.