Examine source code of M. C. Escher

{
  "theme": {
    "images": {
      "theme_frame": "Escher_header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "M. C. Escher",
  "manifest_version": 2,
  "description": "M. C. Escher with Source from <a href=\"https://outgoing.prod.mozaws.net/v1/576750361b0f30027ee5a72095d23dd51cf7d7099cfbd940df5bdedb5a16618b/http%3A//www.mcescher.com/\" rel=\"nofollow\">http://www.mcescher.com/</a>"
}