Examine source code of Shadow fox 4

{
  "theme": {
    "images": {
      "theme_frame": "Shadowfox4.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Shadow fox 4",
  "manifest_version": 2,
  "description": "Shadow fox 4 ! To make this look better : remove the menu toolbox and bring the tabs above the address bar. \n:) ;)"
}