Examine source code of Oh Mandel

{
  "theme": {
    "images": {
      "theme_frame": "oMandel-3.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Oh Mandel",
  "manifest_version": 2,
  "description": "An image from Optimal Mandelbrot\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/23b9bf86217eb00bdfb6d8196270218f036b3bf27f0e180eee0106cf3d8d8925/http%3A//www.freedownloadscenter.com/Multimedia_and_Graphics/Video_and_Animation_Tools/Optimal_Mandelbrot.html\" rel=\"nofollow\">http://www.freedownloadscenter.com/Multimedia_and_Graphics/Video_and_Animation_Tools/Optimal_Mandelbrot.html</a>"
}