TECHNOLOGY · VERIFIED DEVELOPMENT
Firefox Adds Built‑In Ad Blocker to iOS Browser
WHY IT MATTERS
The built‑in blocker gives iOS users immediate control over intrusive ads without installing extensions, reducing screen clutter and enhancing privacy while preserving the open‑web advertising model.
What happened
Mozilla has added a built‑in ad blocker to Firefox for iOS, enabling users to block many third‑party ads and trackers before they load. The feature uses Apple’s WebKit Content Blocker technology and the EasyList filter list.
It is off by default and can be turned on in Settings > Browsing > Ad Blocker. The blocker does not affect ads served directly by the site, search‑result ads, or Firefox’s own sponsored shortcuts.
It works alongside Firefox’s Enhanced Tracking Protection and other privacy safeguards. Users can report issues on Mozilla Connect and find more details on the support page.
PRIMARY SOURCES
Introducing Ad Blocker for Firefox on iOS: More Control, Fewer Distractions
Mozilla (organization statement) · Mozilla · Corporate primary source; facts only, no copied text or images; link and attribution required