Examine source code of Pirate King

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pirate King",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-024-8de86d890779309c9a66423c64daa480.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 72, 32)",
      "toolbar_text": "rgb(241, 207, 47)",
      "frame": "rgb(103, 26, 60)",
      "tab_background_text": "rgb(241, 207, 47)",
      "toolbar_field": "rgb(230, 166, 33)",
      "toolbar_field_text": "rgb(248, 224, 212)",
      "tab_line": "rgb(230, 166, 33)",
      "popup": "rgb(103, 26, 60)",
      "popup_text": "rgb(248, 224, 212)",
      "tab_loading": "rgb(230, 166, 33)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a96ca2e6-2f56-4a07-9083-ef13da1ba5d9}"
    }
  }
}