Examine source code of Cool Summer

{
  "theme": {
    "images": {
      "theme_frame": "CoolSummerHCustom.jpg"
    },
    "colors": {
      "frame": "#00cc33",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Cool Summer",
  "manifest_version": 2,
  "description": "blooms, blossoms, butterflies, butterfly, floral, flowers, glow, green, lady bugs, ladybug, leaves, light, sparkle, spring, summer, vine\t\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/ec8e5140ca064f3d27a9932bdd3c85c508b89106bb76cb137d43b186aec06a1e/http%3A//nature.desktopnexus.com/wallpaper/1095102/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1095102/</a>"
}