Examine source code of Fractal World 13

{
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    "images": {
      "theme_frame": "FractalWorld13.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ff3700"
    }
  },
  "version": "2.0",
  "name": "Fractal World 13",
  "manifest_version": 2,
  "description": "see more at <a href=\"https://outgoing.prod.mozaws.net/v1/28ab60b87bf5d7bdf2bbba86e99b09d2aa72d1427d0de6d4b01babc29efce251/http%3A//www.philofractal.com\" rel=\"nofollow\">www.philofractal.com</a>"
}