In the LIFF browser and LINE's in-app browser, the user's social login with google account isn't allowed. This is because Google's OAuth 2.0 Policies (opens new window) disallow authorization requests from WebView to Google.
Therefore, when the user tries social login with google account in the LIFF browser or LINE's in-app browser, an error with a status code
403 and an error code
disallowed_useragent (opens new window) will be displayed.