Examine source code of Wunderland by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "WonderlandHCustom.jpg"
    },
    "colors": {
      "frame": "#7aa314",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Wunderland by MaDonna",
  "manifest_version": 2,
  "description": "My wallpaper to match can be found at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/3ba55ff1e640c9ddf065d730f579f0b02dcc8d3e5a3232b94084d59c810dbbc7/http%3A//nature.desktopnexus.com/wallpaper/728361/\">http://nature.desktopnexus.com/wallpaper/728361/</a>"
}