Examine source code of Spring One

{
  "theme": {
    "images": {
      "theme_frame": "Spring1H.jpg"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Spring One",
  "manifest_version": 2,
  "description": "pink and green flowers, floral, yellow, flora. summer, Matching desktop wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/7a9250c62a5c1ae4eaea92c56f5cb8ab104c2ca848ed2d20667cad894e731d69/http%3A//nature.desktopnexus.com/wallpaper/614063/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/614063/</a>"
}