Examine source code of Forgotten Sunset

{
  "theme": {
    "images": {
      "theme_frame": "ForgottenSunsetHCustom.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Forgotten Sunset",
  "manifest_version": 2,
  "description": "clouds, evening, field, flowers, grass, grove, sky, summer, sunset, trees, light, morning, sunshine, sunrise, evening, country, bright, happy, sunny, romantic, gold, yellow, \n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/0c0f931324e14d5d82c71bb3879891da9d9459285551df6574c90b1f34252f0e/http%3A//nature.desktopnexus.com/wallpaper/1143355/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1143355/</a>"
}