Examine source code of Exploding Planet

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Exploding Planet",
  "manifest_version": 2,
  "description": "An exploding planet (tutorial located at <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/cde5c4e955a074c478f61a42157dc187214c50503e59a979f40bbf71ec64f4bf/http%3A//paintdotnet.forumer.com/viewtopic.php%3Ff=31&amp;t=26973%29\">http://paintdotnet.forumer.com/viewtopic.php?f=31&amp;t=26973)</a>"
}