Indeed it works now. But when I launched Firefox after having closed it in fullscreen, the Firefox window was restored with it's title bar underneath unity's top panel. So it looked like a maximized window without window controls (close/minimize/maximize).
Indeed it works now. But when I launched Firefox after having closed it in fullscreen, the Firefox window was restored with it's title bar underneath unity's top panel. So it looked like a maximized window without window controls (close/ minimize/ maximize) .