Flatpak Firefox cannot be selected as default browser

[o-alquimista]

What Happened?

Web is the only browser in the list, but I use Firefox (from Flathub).

Steps to Reproduce

1. Install Firefox from Flathub
2. Open System Settings, then Applications, then Defaults, then Internet Browser, and try to select Firefox.

Expected Behavior

Firefox should be there.

OS Version

8.x (Circe)

Session Type

Secure Session (Wayland)

Software Version

Latest release (I have run all updates)

Log Output

No response

Hardware Info

Dell Inspiron 15 3583 (amd64 laptop)

[o-alquimista]

Workaround:

xdg-settings set default-web-browser org.mozilla.firefox.desktop

After that, Firefox appears on the list.