Examine source code of Firefox Harmony

{
  "theme": {
    "images": {
      "theme_frame": "7head.jpg"
    },
    "colors": {
      "frame": "#c9c3c3",
      "tab_background_text": "#31e8d6"
    }
  },
  "version": "2.0",
  "name": "Firefox Harmony",
  "manifest_version": 2,
  "description": "Firefox wraps Win 7 in absolute harmony.\nTurquoise text.\nEnjoy."
}