Zorin OS 18 installing firefox not wanting snap version

[d-man]

@Ponce-De-Leon

You can make that in the Browser Settings of Firefox and set it there as default Browser.

That was the first thing i checked - it appears to be absent:

Maybe that's a Flatpak thing?

vs my Nobara PC:

EDIT - this thread implies it is a Flatpak thing, and @Aravisian provides a solution:

I can't set Firefox as the default Browser

It does not appear among the options in the settings, nor is there an option to set it as a default browser in firefox itself despite disabling the policy that checks if firefox is set as the default browser manually. This is the default firefox that comes with the os [immagine] [immagine]