Examine source code of The Rock

{
  "theme": {
    "images": {
      "theme_frame": "therockheader.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#1bbbf5"
    }
  },
  "version": "2.0",
  "name": "The Rock",
  "manifest_version": 2,
  "description": "The Rock at the South Magnetewan River, Ontario Canada"
}