Examine source code of Shifting Gears

{
  "theme": {
    "images": {
      "theme_frame": "ShiftingGearsHCustom.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Shifting Gears",
  "manifest_version": 2,
  "description": "abstract, gears, metal, steel, technology, mechanics, mechanical, masculine, steampunk\n\nDesigned by MaDonna\n\nMy wallpaper to match is at:  <a href=\"https://outgoing.prod.mozaws.net/v1/3ab3352cf640e54fca72f1f3f90379350e56530e1a3e3662338639ca4e97d880/http%3A//abstract.desktopnexus.com/wallpaper/1049182/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/1049182/</a>"
}