Examine source code of Facebook 2011

{
  "theme": {
    "images": {
      "theme_frame": "Facebook.jpg"
    },
    "colors": {
      "frame": "#417ba8",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Facebook 2011",
  "manifest_version": 2,
  "description": "rate me\nbewertet mich"
}