Examine source code of Amazon Sunset

{
  "theme": {
    "images": {
      "theme_frame": "amazon_sunset_hdr.png"
    },
    "colors": {
      "frame": "#d8db1b",
      "tab_background_text": "#d8db1b"
    }
  },
  "version": "2.0",
  "name": "Amazon Sunset",
  "manifest_version": 2,
  "description": "Sunset over La Selva Lodge on the Rio Napo, Ecuador."
}