Examine source code of Primal Scream

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#ad0000",
      "tab_background_text": "#4a4a4a"
    }
  },
  "version": "2.0",
  "name": "Primal Scream",
  "manifest_version": 2,
  "description": "I made this out of my Wallpaper <a href=\"https://outgoing.prod.mozaws.net/v1/cee878dfbed292cbcd6f84c22988cdfdad48285ef910e74206d68da16779633e/http%3A//v1n3.deviantart.com/art/Tribal-Scream-Wallpaper-140469806\" rel=\"nofollow\">http://v1n3.deviantart.com/art/Tribal-Scream-Wallpaper-140469806</a>"
}