Examine source code of Light & Shadow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Light & Shadow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 196, 255)",
      "toolbar_text": "rgb(255, 196, 0)",
      "frame": "rgb(196, 196, 196)",
      "tab_background_text": "rgb(255, 0, 196)",
      "toolbar_field": "rgb(196, 255, 0)",
      "toolbar_field_text": "rgb(0, 255, 196)",
      "tab_line": "rgb(255, 196, 0)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(196, 0, 255)",
      "tab_loading": "rgb(255, 196, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24df4f6e-84ce-4217-8b90-738536e10217}"
    }
  }
}