Created attachment 1077167 [details] Screenshot Attached screenshot. It seems that labels that should be hidden are not hidden, and the icon is missing. firefox-41.0-4.fc23.x86_64 gtk3-3.18.0-1.fc23.x86_64
Closing as invalid, this is a theme bug: https://github.com/gnome-integration-team/firefox-gnome/issues/357