Close, yet so far. Kiosk opens in fullscreen mode, no window controls. Chrome's --app opens a normal desktop window but without browser controls so that it looks like a desktop app.
I don't know what desktop environment/window manager you are using, but in i3 I can just press $mod+f to exit fullscreen and it will appear as a normal desktop app.
hum, standard XFCE for me. I tried only F11 (default shortcut to enter/exit fullscreen and did not work) but Alt-F11 did the trick. Nice.