There's a reason I disable Facebook buttons on my browser and don't stick them on my own sites (including my blog). I don't trust Facebook with my browsing data, and I don't want to subject users of any website I work on to their abuse, either.
Is there a point to using both of them? I just ended up using only Ghostery a while ago, because running five potentially redundant extensions seemed to do more harm than good with the hits to performance.
"Move fast and break expectation of privacy"