Examine source code of Mad Men

{
  "theme": {
    "images": {
      "theme_frame": "m_M.jpg"
    },
    "colors": {
      "frame": "#f7f4f4",
      "tab_background_text": "#e80c0c"
    }
  },
  "version": "2.0",
  "name": "Mad Men",
  "manifest_version": 2
}