Looking for logging into the Facebook Mobile Safari 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 Mobile Safari site. After that you can login as usual with your login credentials.
https://bugs.launchpad.net/bugs/1238736
https://de-de.facebook.com/help/community/question/%3Fid%3D10153173207725771
https://www.facebook.com/help/community/question/%3Fid%3D10153173207725771
https://stackoverflow.com/questions/10407544/facebook-fb-login-works-in-safari-but-not-mobile-safari
https://apple.stackexchange.com/questions/288046/how-to-view-facebook-messages-on-safari-ios
https://discussions.apple.com/thread/5034348
https://www.businessinsider.com/apple-vs-facebook-safari-browser-privacy-2018-6
https://www.liontreegroup.com/general-news/how-to-use-facebook-without-the-app/
https://github.com/feathersjs/authentication/issues/651
https://www.youtube.com/watch%3Fv%3DMNfrBdyEvmY
https://www.youtube.com/watch%3Fv%3DW5-Tzq_zpzk
https://forums.coronalabs.com/topic/62517-login-opens-safari-not-facebook-app-on-ios-and-doesnt-authorise-correctly/
https://forums.macrumors.com/threads/facebook-links-open-safari-instead-of-mobile-fb-app.1479433/