Preferences preferences {
    Width  600
    Height 520
    TabBackground white
    Tab main {
        Text "Main"
        Image "advancedsettings"
        Padding {8 0}
        RowConfigure all { Pad 5 }
        ColumnConfigure 0 { Weight 1 }
        Grid { Sticky "nw" }
        Row {
            Widget {
                Pady   {0 10}
                Sticky ew
                Type "separator"
                Text "Startup"
            }
        }
        Grid { Padx {10 0} } 
        Row {
            Sticky   "nw"
            Combined "yes" 
            Widget {
                Type "Label"
                Text "When Firefox starts:"
            }
            Widget {
                Weight 1
                Width 35
                Type "Menubutton"
                Preference "startupAction"
                Values {
                    "*Show my home page"
                    "Show a blank page"
                    "Show my windows and tabs from last time"
                }
            }
        }
    }
    etc...
}