Examine source code of MS Edge Dark Clone

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Microsoft Edge Dark Clone",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 32, 32)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(32, 32, 32)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(43, 43, 43)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(69, 69, 69)",
      "popup": "rgb(32, 32, 32)",
      "popup_text": "rgb(239, 239, 239)",
      "ntp_background": "rgb(36, 36, 36)",
      "tab_selected": "rgb(63, 63, 63)",
      "toolbar_bottom_separator": "rgb(32, 32, 32)",
      "toolbar_top_separator": "rgb(32, 32, 32)",
      "tab_loading": "rgb(69, 69, 69)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{72c09a7d-8a13-4ff2-9573-2c0c924d53aa}"
    }
  }
}