Examine source code of Papyrus Book

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Papyrus Book",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(63, 63, 60, 0.8)",
      "toolbar_text": "rgb(196, 159, 108)",
      "frame": "rgb(40, 38, 34)",
      "tab_background_text": "rgb(128, 128, 140)",
      "toolbar_field": "rgba(60, 60, 60, 0.2)",
      "toolbar_field_text": "rgb(196, 159, 108)",
      "tab_line": "rgba(226, 226, 160, 0.44)",
      "popup": "rgb(72, 71, 66)",
      "popup_text": "rgb(210, 206, 169)",
      "ntp_background": "rgb(200, 197, 191)",
      "tab_loading": "rgba(226, 226, 160, 0.44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{31b34988-192e-4288-8fcd-ebde86793862}"
    }
  }
}