Examine source code of Nextcloud OTP Manager

{
  "manifest_version": 2,
  "name": "Nextcloud OTP Manager",
  "description": "Official Nextcloud OTP Manager browser extension",
  "version": "1.0.1",
  "short_name": "OTP Manager",
  "icons": {
    "16": "icon-16.png",
    "24": "icon-24.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "otpmanager-nextcloud-browser-extension@convertino.cloud",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    }
  },
  "browser_action": {
    "default_title": "OTP Manager",
    "default_popup": "popup.html"
  }
}