Examine source code of Google Docs Viewer

{
  "description": "Allows you to view documents and other files online with the google docs viewer.",
  "manifest_version": 3,
  "name": "Google Docs Viewer",
  "version": "1.3.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a734ba68-4aac-41e0-9141-9f8d00373d93}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "112.0"
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  },
  "icons": {
    "16": "icons/docs-16.png",
    "32": "icons/docs-32.png",
    "48": "icons/docs-48.png",
    "64": "icons/docs-64.png",
    "96": "icons/docs-96.png",
    "128": "icons/docs-128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/docs-16.png",
      "32": "icons/docs-32.png"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "bg.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "options.html"
  }
}