https://www.cnet.com/news/firefox-will-stop-hiding-important-privacy-feature-tracking-protection/

Mozilla developers accepted an update to the Firefox Nightly test version on Wednesday that makes tracking protection easier to discover, easier to use and more nuanced. Tracking protection blocks website publishers and advertisers from running software that tracks your online behavior -- something that's useful for targeting ads to specific people but that can invade privacy.

The feature previously was tucked away in a preferences submenu, but now it's accessible directly from the three-line "hamburger" menu in the upper right of the browser. And once it's enabled, Firefox lets you block tracking site by site instead using the previous all-or-nothing approach by clicking on an information icon on the left side of the address bar.