Examine source code of Windows 10

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Windows 10",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 145, 255, 0)",
      "toolbar_text": "rgb(0, 131, 255)",
      "frame": "rgb(49, 149, 255)",
      "tab_background_text": "rgb(0, 13, 255)",
      "toolbar_field": "rgb(244, 241, 255)",
      "toolbar_field_text": "rgb(29, 40, 238)",
      "tab_line": "rgb(116, 112, 248)",
      "popup": "rgb(133, 138, 255)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(116, 112, 248)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{689e29ea-24ad-401a-b72d-a71c2c02a0e2}"
    }
  }
}