Flatpak version of Firefox doesn't pick up chrome-gnome-shell
I installed a flatpak of Firefox nightly (see https://firefox-flatpak.mojefedora.cz/). I am using Fedora Silverblue 28 and have chrome-gnome-shell installed. The rpm version of Firefox installed on the system picks up chrome-gnome-shell fine but the flatpak version doesn't. When I go to https://extensions.gnome.org/ in the flatpak firefox it see the message on the webpage:
Although GNOME Shell integration extension is running, native host connector is not detected. Refer documentation for instructions about installing connector.
I don't know if this is a firefox nightly issue, a flatpak issue or chrome-gnome-shell issue but am posting the issue here first