Examine source code of Darksiders Design 2

{
  "theme": {
    "images": {
      "theme_frame": "design8.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Darksiders Design 2",
  "manifest_version": 2,
  "description": "All Done with <a href=\"https://outgoing.prod.mozaws.net/v1/6c67a6544621a57268c52dc018bb2366122a90d2da6787c748d3da03b6b64347/http%3A//Paint.net\" rel=\"nofollow\">Paint.net</a> ... just a little tryout"
}