Examine source code of The Colosseum

{
  "theme": {
    "images": {
      "theme_frame": "RomePanorama.jpg"
    },
    "colors": {
      "frame": "#706e6e",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "The Colosseum",
  "manifest_version": 2,
  "description": "A View of the Colosseum in Rome, Italy"
}