Comment # 1 on bug 1182199 from Dario Faggioli

Just checked, the package is installed by default if picking GNOME (it's not in
the pattern as far as I can see, it comes as a dependency I guess).

And `xdg-open` (if installed :-)) does cause Chromium to open.

It seems like it should be explicitly added to the KDE patterns as well.

If Fabian thinks it makes sense, I can make an SR.