Examine source code of Be Happy Today

{
  "theme": {
    "images": {
      "theme_frame": "BeHappyToday.jpg"
    },
    "colors": {
      "frame": "#cc9966",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Be Happy Today",
  "manifest_version": 2,
  "description": "fall, autumn, leaves, berries, squirrel, butterfly, flowers, sunflower, nuts, acorns, My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/7a51c164d5cb57d1c4b3059cf54517d4f31683129049a0bfb9bea9eb5ede68b1/http%3A//nature.desktopnexus.com/wallpaper/845555/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/845555/</a>"
}