Safari OS X: Fix Facebook web login buttons not working anymore
Here's a fix for Safari 8 on OS X Yosemite on how-to resolve the issues with the Facebook Single-Sign-On Login Buttons on websites not working anymore, due to a strict Cookie & website data restriction setting in Safari's Preferences.
9 Sep 2015 ... Since some time I noticed an issue with Safari 8 on OS X 10.10 Yosemite and Facebook Single-Sign-On Login Buttons on websites not working ...