Examine source code of Dragon Spirited Away

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dragon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(91, 210, 230, 0.4)",
      "toolbar_text": "rgb(28, 71, 227)",
      "frame": "rgb(162, 234, 235)",
      "tab_background_text": "rgb(0, 15, 1)",
      "toolbar_field": "rgba(91, 210, 230, 0.8)",
      "toolbar_field_text": "rgb(0, 15, 1)",
      "tab_line": "rgb(28, 71, 227)",
      "popup": "rgb(162, 234, 235)",
      "popup_text": "rgb(28, 71, 227)",
      "tab_loading": "rgb(28, 71, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ee2e5a4-9d53-422c-ac79-d620c5c42a68}"
    }
  }
}