Examine source code of Redirect2RawPDF

{
  "manifest_version": 2,
  "name": "Redirect2RawPDF",
  "version": "1.2",
  "description": "Redirect to raw pdf files.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "Redirect2RawPDF.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{06c17b8a-f53b-4e69-97c3-8b6af09a6c87}"
    }
  }
}