Examine source code of Summer to Fall

{
  "theme": {
    "images": {
      "theme_frame": "SummertoFallH2Custom.jpg"
    },
    "colors": {
      "frame": "#050505",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "Summer to Fall",
  "manifest_version": 2,
  "description": "windmills, trees, leaves, blowing, autumn, flowers, butterflies, grass, sky, sunflowers, butterfly, Netherlands, Holland, summer, My wallpaper to match can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/7869786a60a8a157318d220da067465004c8235f6181c94e877ddcf27b57d677/http%3A//nature.desktopnexus.com/wallpaper/673469/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/673469/</a>"
}