Examine source code of HONG's Black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "HONG's Black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(60, 64, 64)",
      "toolbar_text": "rgb(231, 233, 236)",
      "frame": "rgb(25, 26, 26)",
      "tab_background_text": "rgb(139, 139, 153)",
      "toolbar_field": "rgba(26, 28, 28, 0.53)",
      "toolbar_field_text": "rgb(247, 242, 245)",
      "tab_line": "rgb(66, 63, 63)",
      "popup": "rgb(54, 56, 56)",
      "popup_text": "rgb(232, 226, 226)",
      "tab_loading": "rgb(66, 63, 63)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7cae2910-3585-4ba3-83c8-712c0852fc0a}"
    }
  }
}