Examine source code of Windows 9-esque

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Windows 9-esque v3",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(191, 191, 191)",
      "toolbar_text": "rgb(0, 0, 128)",
      "frame": "rgb(0, 124, 120)",
      "tab_background_text": "rgb(246, 249, 83)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(244, 5, 2)",
      "tab_line": "rgb(0, 0, 128)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(13, 157, 15)",
      "tab_loading": "rgb(0, 0, 128)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6cfa100b-225c-4273-ab4b-1ea7a0a673a5}"
    }
  }
}