FYI, Ghostery, a free browser add-on, blocks trackers, tells you how many trackers there are and will tell you who the trackers are.
libertytree.com trackers are: Google Tag Manager, Gravatar and Twitter Button.
Ghostery has always reported FR as being tracker-free.
At the bottom of every FR page... (view the source code)
Thanks! In addition to the trackers, the site also reports to Facebook anytime it is accessed. Some sites are surprisingly bad. Mark Levin’s website is worse than CNN for trackers.