Examine source code of Growing on Wall

{
  "theme": {
    "images": {
      "theme_frame": "GrowingonWallH.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Growing on Wall",
  "manifest_version": 2,
  "description": "grunge, green, plant, leaves, vintage, old,\nwall, building, grungy look. Desktop wallpaper that matches is at: <a href=\"https://outgoing.prod.mozaws.net/v1/ecb42fe77b783c45f1d16417fb480f1d30061b8eada5986ce819805efcb1c958/http%3A//nature.desktopnexus.com/wallpaper/610721/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/610721/</a>"
}