Examine source code of Rainbow Evening

{
  "theme": {
    "images": {
      "theme_frame": "RainbowEveningHCustom.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Rainbow Evening",
  "manifest_version": 2,
  "description": "autumn, fall, sky, leaves, tree, color, bright\nI took this photo and did not enhance the colors. They are exactly what the eyes see. I have the desktop wallpaper to match at: <a href=\"https://outgoing.prod.mozaws.net/v1/d2ddba2e620f994c46ba4385d071250fb9c7f435730403058048df43c4122b8b/http%3A//nature.desktopnexus.com/wallpaper/488673/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/488673/</a>"
}