Examine source code of Stonehenge England

{
  "theme": {
    "images": {
      "theme_frame": "stonehenge-h.jpg"
    },
    "colors": {
      "frame": "#e32222",
      "tab_background_text": "#e3e012"
    }
  },
  "version": "2.0",
  "name": "Stonehenge England",
  "manifest_version": 2,
  "description": "Stonehenge England"
}