window.openDialog does not remove the titlebar on linux

Question

I use the following code to display a popup:

    var win = window.openDialog("chrome://broceliand/content/view/popup/nameMapPopup.xul", 
      "", 
            "all=no," +
      "titlebar=no," + 
            "chrome=yes," +
            "toolbar=no," +
            "dialog=no," +
            "resizable=no," + 
            "modal=yes," +
            "dependent=yes," +
            "top="+popupY+"px," +
            "left="+popupX+"px",
            args);

On windows the popup is pretty clean. There are no common elements remaining. But on linux le titlebar still remains and the popup is resizable.

Answer 1

That might be because on Linux the window decorator is responsible for the titlebar. This can even be a seperate program to the window manager.

Does the popup need to be as a seperate window? Perhaps panel is really what you are looking for.