Examine source code of Circumpolar

{
  "theme": {
    "images": {
      "theme_frame": "hdcircle.jpg"
    },
    "colors": {
      "frame": "#bd7553",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Circumpolar",
  "manifest_version": 2,
  "description": "Firefox Persona version of my “Circumpolar” wallpaper. 3D artwork by Ryan Bliss. Persona Designed by Mark Hamilton for Digital Blasphemy. Wallpaper available at <a href=\"https://outgoing.prod.mozaws.net/v1/ec355a655c143f4ce337dac1dede0f6e893f4120741709e259638ea7fd23b040/http%3A//digitalblasphemy.com/preview.shtml%3Fi=circumpolar\" rel=\"nofollow\">http://digitalblasphemy.com/preview.shtml?i=circumpolar</a>"
}