Looking for logging into the Fb Button Redirect site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Fb Button Redirect site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/5200167/how-to-let-facebook-login-button-redirect-to-a-particular-url
https://stackoverflow.com/questions/5200167/how-to-let-facebook-login-button-redirect-to-a-particular-url/5638337
https://www.socketloop.com/tutorials/facebook-login-button-redirect-to-a-particular-url
https://developers.facebook.com/docs/facebook-login/web/
https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow/
http://qnimate.com/implementing-facebook-login-in-websites/
https://stormpath.com/blog/facebook-login-guide
http://www.albertgao.xyz/2017/08/22/how-to-implement-facebook-login-via-official-js-sdk/
https://www.sammyk.me/best-practice-for-facebook-login-with-the-javascript-sdk-and-php-sdk-v4-1
https://www.youtube.com/watch?v=ea9KyE78qKI
https://eureka.ykyuen.info/2011/10/14/facebook-javascript-sdk-%E2%80%93-reloadredirect-url-after-facebook-login/
https://www.cloudways.com/blog/add-facebook-login-in-php/
https://auth0.com/docs/connections/social/facebook