Examine source code of Friday Harbor Orcas

{
  "theme": {
    "images": {
      "theme_frame": "OrcaWatching.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Friday Harbor Orcas",
  "manifest_version": 2,
  "description": "Image we took while orca watching near Friday Harbor, San Juan Island, Washington.  There were actually numerous orcas all enjoying the beautiful day, just as we were."
}