Examine source code of Autumn charm

{
  "theme": {
    "images": {
      "theme_frame": "1mic.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Autumn charm",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/4a1e8a3c7d9e21eb78fddb30b0cd8336d447e9e78d1890823d88da1513aeb63d/http%3A//nature.desktopnexus.com/wallpaper/1161183/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/1161183/</a>\n\nAutumn branch color leaf tree landscape nature September October November season scenery green gold red yellow wood forest tree Real.Twilight"
}