Giving people choice in how they experience the web is important to us. Advertising helps fund much of the open web, supporting the publishers, creators and websites people rely on. We also know that ads can sometimes crowd the screen or interrupt what you’re trying to do.
Cross-website tracking and data collection, to the point where it has become an FBI-recognized threat, seems like the opposite of the "open web," and it's pretty clear there are problems with it other than being an annoyance.
(Mozilla knows this. They created Tracking Protection years ago. They mention it in this post. Ad and tracker blocking are closely related subsets of content blocking.)
That’s why Ad Blocker is optional: you decide whether it’s part of how you browse.
Ad blocking is disabled by default.
It’s part of a broader approach across Firefox to give you more control over your experience, from the extensions you use to how AI shows up in your browser.
AI is enabled by default.
