Examine source code of Circles and Square

{
  "theme": {
    "images": {
      "theme_frame": "CirclesandSquareH.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Circles and Square",
  "manifest_version": 2,
  "description": "abstract, beams, blue, bright, flare, geometrics, glow, lights, space, square, tech, technology\t\n\nDesigned by MaDonna\n\nMy wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/758062fbaa9b0b38627abfd6e20941063df362c9799fe5fa636b0240362d7bd5/http%3A//abstract.desktopnexus.com/wallpaper/1097994/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/1097994/</a>"
}