The latest version of Safari comes with pretty solid privacy features, but Apple also provided a Content Blocker API to allow extensions like GhosteryLite to extend its abilities. Ghostery maintains an extensive database of trackers and ad platforms, and using Apple’s own API means it doesn’t add extra load to Safari’s performance. (And blocking ads and trackers will help your sites load even faster, naturally.)
Safari’s “Lite” version of Ghostery offers fewer customisation options: You can’t disable specific trackers, and are instead stuck with whitelisting or blacklisting entire sites. You can customise the categories of trackers it disables, like only blocking ads and analytics, audio/video players, or adult content. For those who want full-coverage privacy protection, the more granular capabilities won’t be missed. The default blocking options are great, and you can install and run GhosteryLite without any additional setup or configuration.
To use GhosteryLite with Safari, install the (free) extension via the Mac App Store, run it once to install the extensions, then open Safari and go to Preferences > Extensions. There are two extensions to enable in the list, GhosteryLite and GhosteryLite UI. If you want the ability to whitelist a site from a popup, enabling the latter is key.
Ghostery Lite for Safari is Live | Ghostery