Examine source code of Summer 3

{
  "theme": {
    "images": {
      "theme_frame": "summer3copy.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Summer 3",
  "manifest_version": 2,
  "description": "summer, grass, flowers, mushrooms, ladybug, frog, bee. My matching desktop wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/b2a4448b373c7eae0ee58c6754104590e9d2a9823cd0a025dc7a76a4a1bc2869/http%3A//nature.desktopnexus.com/wallpaper/605468/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/605468/</a>"
}