Examine source code of Green Planet in Space

{
  "theme": {
    "images": {
      "theme_frame": "greenplanetheader.jpg"
    },
    "colors": {
      "frame": "#9e9e9e",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Green Planet in Space",
  "manifest_version": 2,
  "description": "Green Planet, rendered in Terragen 2 by <a href=\"https://outgoing.prod.mozaws.net/v1/bf3211435a2b3e2e03af8280e03d11a10539cf05de3e26901e68b6921381c604/http%3A//www.nwdanet.com\" rel=\"nofollow\">http://www.nwdanet.com</a>"
}