Enable developer console in browser and navigate to:
Look for the response of POST request in the network tab of developer console: https://www.facebook.com/v2.6/dialog/oauth/confirm?dpr=1 it contains the access token parameter. Just search for 'access_token' in the response. For the lazy people (like myself) i made a small helper that parses the token from response https://taseppa.github.io/tokenparser.github.io/
I think, the Link doesn't work correctly.
Please check this link.
https://www.facebook.com/v2.6/dialog/oauth?redirect_uri=fb464891386855067%3A%2F%2Fauthorize%2F&scope=user_birthday%2Cuser_photos%2Cuser_education_history%2Cemail%2Cuser_relationship_details%2Cuser_friends%2Cuser_work_history%2Cuser_likes&response_type=token%2Csigned_request&client_id=464891386855067&ret=login&fallback_redirect_uri=221e1158-f2e9-1452-1a05-8983f99f7d6e&ext=1556057433&hash=Aea6jWwMP_tDMQ9y
and Open developer tool in browser, you can find "access_token" there.
I hope it will works for everyone.