Examine source code of Utah Desert

{
  "theme": {
    "images": {
      "theme_frame": "desert-top3.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Utah Desert",
  "manifest_version": 2,
  "description": "A nice view of the Utah desert"
}