Examine source code of Lights at Night

{
  "theme": {
    "images": {
      "theme_frame": "LightsatNightH.jpg"
    },
    "colors": {
      "frame": "#000099",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Lights at Night",
  "manifest_version": 2,
  "description": "river, night, sunset, city, lights, bridge, sky, blue, My wallpaper to match can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/65c90831bfec05e685842628515e40b1ce485190c199618489390b34fd4286dc/http%3A//nature.desktopnexus.com/wallpaper/819502/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/819502/</a>"
}