Examine source code of Gradient Gerbera

{
  "theme": {
    "images": {
      "theme_frame": "2.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Gradient Gerbera",
  "manifest_version": 2,
  "description": "daisy, flower, floral, spring, flora, bright pink, gradient, abstract. © MaDonnas The desktop wallpaper is available at:\n<a href=\"https://outgoing.prod.mozaws.net/v1/faf4f238d937e3c400c68da3383f44bca0c5466478ccb948bd791cdbf9a083d9/http%3A//nature.desktopnexus.com/wallpaper/573083/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/573083/</a>"
}