Examine source code of City Holes

{
  "theme": {
    "images": {
      "theme_frame": "Headercompressed.jpg"
    },
    "colors": {
      "frame": "#8a8a8a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "City Holes",
  "manifest_version": 2,
  "description": "Brushes used :\n• Vector Foliage by Obsidian Dawn \n<a href=\"https://outgoing.prod.mozaws.net/v1/0632a4eafd88149df46b57a087fc6eb4b9a0ea7f49ab9b18642d9308f04c867b/http%3A//www.obsidiandawn.com/vector-foliage-photoshop-gimp-brushes\" rel=\"nofollow\">http://www.obsidiandawn.com/vector-foliage-photoshop-gimp-brushes</a>\n• Rush Brushes by Axeraider70\n<a href=\"https://outgoing.prod.mozaws.net/v1/ced9cd4f9be3480ec95d9b4da5523963b0ec7c1659576a350e2885340505a0b9/http%3A//axeraider70.deviantart.com/art/Rush-Brushes-67356431\" rel=\"nofollow\">http://axeraider70.deviantart.com/art/Rush-Brushes-67356431</a>"
}