Examine source code of Iceberg, Right Ahead!

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#030724",
      "tab_background_text": "#ff7300"
    }
  },
  "version": "2.0",
  "name": "Iceberg, Right Ahead!",
  "manifest_version": 2,
  "description": "What appears to be a relatively small and harmless iceberg conceals a behemoth below the waves."
}