Examine source code of MadMen Favs

{
  "theme": {
    "images": {
      "theme_frame": "Untitlednorm.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "MadMen Favs",
  "manifest_version": 2,
  "description": "Just a compilation from MadMen stuff. Better for people who likes narrow tops for Firefox, or you can edit."
}