Examine source code of MS Edge Inspired

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Edge Style",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(55, 56, 56)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(23, 23, 23)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(33, 33, 33)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 0, 0, 0.2)",
      "popup": "rgb(58, 58, 58)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(35, 35, 35)",
      "popup_border": "rgba(35, 35, 35, 0)",
      "sidebar_border": "rgba(35, 35, 35, 0)",
      "tab_loading": "rgb(8, 174, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{842374ed-fcad-4e7e-bcdb-aa8144a47190}"
    }
  }
}