Looking for logging into the Facebook Signup 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 Facebook Signup site. After that you can login as usual with your login credentials.
https://www.facebook.com/
https://www.express.co.uk/life-style/science-technology/1025812/Facebook-login-sign-up-more-than-one-account-create-Facebook-account
http://support.agorapulse.com/article/show/70789-how-to-sign-up-and-log-in-to-agorapulse
https://www.thewindowsclub.com/facebook-sign-in-login
https://support.udemy.com/hc/en-us/articles/115010555448-Using-Your-Google-or-Facebook-Account-to-Access-Udemy
https://www.avg.com/en/signal/is-it-safe-to-log-in-with-facebook-or-google
https://docs.microsoft.com/en-us/aspnet/core/security/authentication/social/facebook-logins
https://support.strava.com/hc/en-us/articles/216942767-How-to-switch-from-a-Facebook-login-to-email-login
http://www.uandblog.com/How-to-login-or-signup-with-facebook-API-using-PHP
https://firebase.google.com/docs/auth/android/facebook-login
https://forum.bubble.is/t/login-sign-up-with-facebook/20331
https://meta.discourse.org/t/configuring-facebook-login-for-discourse/13394
https://lets.getopensocial.com/manual-social-signup-login