I am wondering: When looking at the Source-Code of XenForo, I see this Link to "Facebook". Why do we need this Link to "Facebook" at the XenForo-website ? Is this a tracker ? Can I delete this code ? Code: <!DOCTYPE html> <html id="XenForo" lang="en-US" dir="LTR" class="Public NoJs GalleryLazyLoader LoggedOut Sidebar Responsive" xmlns:fb="http://www.facebook.com/2008/fbml"> <head> Thanks!