Examine source code of In Flight

{
  "theme": {
    "images": {
      "theme_frame": "inflight_hd.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#434343"
    }
  },
  "version": "2.0",
  "name": "In Flight",
  "manifest_version": 2,
  "description": "Jumbojet passenger airplane in flight in a blue sky."
}