I don't see how an add-on posted on the Chrome store is subject to Facebook's ToS. It might be aiding people in breaking the ToS, but is there really a law against that?
Well you've been quite extreme in this thread. I get your concerns, but I'd say that day is still very much far away. Libertarian lunatics like Peter Thiel certainly dream of it, but I really doubt it will become the reality, at least not over the whole world if indeed so in the already very corporate America.
Anyways, if the vision aspired by Thiel happens, those "libertarian" capitalists will be killed by revolts/uprisings in an instant. A world without tax nor regulation nor basic support for social equality never works. Just as explained in Capitalism in the 21st Century, if inequality is not addressed, there will be revolts and chaos. Extreme injustice can't dominate forever.