Bug#389464: gnome-themes-extras: non-free Firefox icon included

[Filipus Klutiero]

Package: gnome-themes-extras
Version: 0.9.0-5
Severity: serious
Justification: Policy 2.2.1

gnome-themes-extras's copyright file indicates that the package is under
the GPL, but a non-GPL Firefox icon is included in
usr/share/icons/Nuvola/scalable/apps/firefox.svg. Additionally,
gnome-themes-extras is in main and the Firefox icon is not modifiable.