Examine source code of RockArt

{
  "theme": {
    "images": {
      "theme_frame": "Rockart.jpg"
    },
    "colors": {
      "frame": "#f70808",
      "tab_background_text": "#f7a708"
    }
  },
  "version": "2.0",
  "name": "RockArt",
  "manifest_version": 2,
  "description": "Beautiful RockArt can be seen all the way along our Seawall in West Van.  Artist unknown but cheers to you!"
}