For me, 4 hrs ago I went to my Newsfeed in Facebook for the first time in a couple of days, and that initial snip/ESET blocking popped up.
Newsfeed has become nothing but an advertising place for Facebook, so I post my stuff and leave, only monitoring if someone comments.
The Github location was where Patricia WhaleyPatricia and 6 others manage the membership, moderators, settings, and posts for Social Fixer User Support. Jerry, the blocked address is the site where all the subscription Filters and Tweaks reside, and you need to whitelist that with your antivirus or you will not be able to use any of those Filters/Tweaks.
I had to leave for a few hours, and I've only just now picked up trying to sort through it.