Examine source code of Fedora 19

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#011135",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Fedora 19",
  "manifest_version": 2,
  "description": "Personas for Firefox based on default Wallpaper of Fedora 19.\n\nWallpaper's authors:\nMairin Duffy (mizmo, duffy@fedoraproject.org)\nLuya Tshimbalanga (finalzone, luya@fedoraproject.org)\nMartin Sourada (msourada, mso@fedoraproject.org)"
}