Note that Privacy Badger uses a browser history-dependent algorithm for blocking - when you first install it, it doesn't block anything because it assumes that third-party trackers are innocent until proven guilty. When it sees you being tracked on 3+ first-party domains by a third party, it either blocks or cookieblocks the third party. I wrote up a basic description of the algorithm here: https://github.com/EFForg/privacybadgerfirefox/blob/master/R...

So if you're testing Privacy Badger on a profile with no browsing history, it is bound to do worse than other extensions. You have to "prime" it with some browsing data before it's really effective.