This add-on builds over time a local database of 1st party/3rd party occurrences. It is a very interesting attempt at personalizing the benchmarking of ad-blocking/privacy-enhancing add-ons.

The concept seems similar to Privacy Badger, in the sense that the add-on experience is personalized to the user. The core difference is that the add-on does not block anything, it just aggregates stats based on your browsing history.

Right now, I am using uBlock Origin to block ads ("very easy mode") and Privacy Badger to enhance my privacy. I was really surprised that, despite using Privacy Badger for weeks, uBO-Scope would tell me that google-analytics was still not blocked! I am going to switch back from Privacy Badger to uBlock Origin with EasyPrivacy subscription now...

Regarding Privacy Badger: Google Analytics is considered first-party and not blocked by Privacy Badger. When I posted a negative review about it on the addon page, this review was deleted for a spurious reason. When I posted a new review, it was again deleted without even notifying me by email, like it did for the first review deletion. So I am stating it here, as I learnt about it thanks to uBO-Scope: The heuristic of Privacy Badger is unable to block Google Analytics. This is documented in several closed Github issues:
https://github.com/EFForg/privacybadger/issues/340
https://github.com/EFForg/privacybadger/issues/367