Examine source code of Bluebird schoolbus

{
  "theme": {
    "images": {
      "theme_frame": "top003.jpg"
    },
    "colors": {
      "frame": "#4f4e4e",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Bluebird schoolbus",
  "manifest_version": 2,
  "description": "Old american Bluebird schoolbus."
}