non-ubuntu packages don't appear in 'Add/Remove Applications'

Progetto:Trisquel
Versione:8.0
Componente:Gnome
Categoria:compito
Priorità:normal
Assigned:Non assegnata
Stato:active
Descrizione

IceCat and Abrowser, for instance, are missing. I believe that this is because /usr/share/app-install/desktop has not been updated from Ubuntu.