Examine source code of Leaving Vancouver BC

{
  "theme": {
    "images": {
      "theme_frame": "LeavingVancouverBC.jpg"
    },
    "colors": {
      "frame": "#5ffa79",
      "tab_background_text": "#03a8a8"
    }
  },
  "version": "2.0",
  "name": "Leaving Vancouver BC",
  "manifest_version": 2,
  "description": "Off to Alaska  - past Stanley Park, Vancouver BC."
}