{ -brand-name-firefox-focus } blocks a wide range of common trackers by default including social trackers and those sticky ones that come from things like { -brand-name-facebook } ads.
{ -brand-name-firefox-focus } 默认即会拦截各种常见跟踪器，包括社交跟踪器和那些来自 { -brand-name-facebook } 广告的“粘人”跟踪器。