Return default icons on about:addons page (#37)
Return default icons on about:addons page (#37)

synapsos/firefox-gnome,lbrfabio/firefox-gnome-flat,gnome-integration-team/firefox-gnome,gnome-integration-team/firefox-gnome,synapsos/firefox-gnome,gnome-integration-team/firefox-gnome,lbrfabio/firefox-gnome-flat,lbrfabio/firefox-gnome-flat,synapsos/firefox-gnome,lbrfabio/firefox-gnome-flat,synapsos/firefox-gnome,gnome-integration-team/firefox-gnome