Examine source code of FritzDaKat

{
  "theme": {
    "images": {
      "theme_frame": "bDDwAtomicKittenFirefoxTheme-Header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "FritzDaKat",
  "manifest_version": 2,
  "description": "FritzDaKat aka Buddy Winsmore lives in a box, creates contents to virtual worlds and Blogs by TARDIS."
}