Examine source code of Green Freshness

{
  "theme": {
    "images": {
      "theme_frame": "FreshnessHcopyCustom.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Green Freshness",
  "manifest_version": 2,
  "description": "field with grass, flowers, butterfly and dragonfly, fresh, spring, summer, bright, mushrooms, toad stools, toadstools, green, My wallpaper to match is available at: <a href=\"https://outgoing.prod.mozaws.net/v1/56f13801127a61e13949bd600116d5828eb24897f970e7a64cd61482a51dcd5f/http%3A//nature.desktopnexus.com/wallpaper/659449/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/659449/</a>"
}