Hi guys , thanks in advance. I need to display an html control board. I will launch it from command line at startup and nothing else should be visible.(no buttons , address bar, tittle bars , tab bars) Is it possible ? I achieve it using chromium doing: chromium --app=file:///home/leo/Documentos/mptrain/5index.html --window-size=1350,300 I hope i can do same with firefox so I dont need to move to chromium ... i preffer firefox.