On Tue, Jun 13, 2017 at 9:53 AM Kamil Paral <kparal@redhat.com> wrote:
As we covered in a discussion a while back, gnome-software allows you to only install extensions packaged as rpms. It doesn't show extensions available on the website but unavailable as rpms. I just checked with F26 Beta Workstation Live.

That means the shell-extensions plugin isn't working for some reason, so you only see extensions provided by the packagekit plugin.  The plugin is built and installed in Fedora, so it's not immediately clear what's wrong.