Examine source code of Html RFC

{
  "manifest_version": 2,
  "name": "Html RFC",
  "version": "1.2",
  "description": "Suggest the same RFC in HTML format instead of plain text.",
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon_2x.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.ietf.org/rfc/rfc*.txt",
        "*://www.rfc-editor.org/rfc/rfc*.txt"
      ],
      "js": [
        "htmlrfc.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d0eb61d-d976-4a1f-8ef2-c16d93127922}"
    }
  }
}