Examine source code of TOTP Authenticator

{
  "manifest_version": 3,
  "name": "TOTP Authenticator",
  "version": "1.1.2",
  "description": "Multi-account offline TOTP generator",
  "default_locale": "en",
  "action": {
    "default_popup": "Views/popup.html",
    "default_icon": {
      "32": "icons/icon_32.png",
      "64": "icons/icon_64.png",
      "96": "icons/icon_96.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "authenticator@aldaror",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    }
  },
  "icons": {
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "64": "icons/icon_64.png",
    "96": "icons/icon_96.png"
  }
}