Examine source code of Massive Dynamic

{
  "theme": {
    "images": {
      "theme_frame": "md_ff-header_r.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Massive Dynamic",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/cd86ed6ad96ade089ea5b411bf9993d123c28f36f1a66605354fe45a8f74e4ea/http%3A//massivedynamic.com/\" rel=\"nofollow\">http://massivedynamic.com/</a>"
}