Makes sense for Firefox and Chrome to use this extensions. Does anyone know if it is worth adding it to the Brave browser (which is based on Chromium so it accepts all Chrome extensions), as Brave already has a lot of anti-tracking etc. feature built into it?

This extension do not block Piwik tracker, when I navigate to http://www.ifs.edu.br/.

I will not pretend to have any idea as to how to measure privacy, and thus will not comment about that.
But I do know when my browser, core and ram are working extremely slow; My CPU and 8GB RAM are constantly maxed and Firefox stops responding for ten seconds approximately twice every minute! This happens regardless of whether there are five hundred running tabs, or only five. I wouldn't recommend using this extension until this issue is fixed.

Its gives me an idea on how invasive a website is, and explains why. It doesn't say what it means, but to me, to be en guard regarding personal information you may be asked about when you are there.