OK, I wrote that comment and I'm not a Ghostery user, so I don't know what it does by default. I'm not a Ghostery user because I do not trust it. Don't know the latest state of affairs, but the company developing Ghostery seemed fishy. I can trust either projects developed by non-profits committed to my interests, such as EFF or Mozilla, or projects developed by enthusiasts on GitHub.

Depending on the device, I am using Privacy Badger from EFF, Mozilla's Focus for iOS, or uBlock with the EasyPrivacy list. Was using AdBlock Plus in Firefox for Android, but it lacks the option to subscribe to third-party filter lists, an almost 2 year old ticket that still hasn't been fixed.