Examine source code of On Vacation

{
  "theme": {
    "images": {
      "theme_frame": "h_onvacation.jpg"
    },
    "colors": {
      "frame": "#fbe7ab",
      "tab_background_text": "#040040"
    }
  },
  "version": "2.0",
  "name": "On Vacation",
  "manifest_version": 2,
  "description": "Starfish, sand, beach, water, sea, drink, umbrella, straw,  stones, mussel, orange, blue, white, foam, lazy, relax"
}