Examine source code of Sunset Within The Trees

{
  "theme": {
    "images": {
      "theme_frame": "sinset.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Sunset Within The Trees",
  "manifest_version": 2,
  "description": "Here is a picture of a beautiful sunset in Missouri.  I took the picture in my back yard."
}