Mozilla launched built-in ad blocking for Firefox on iOS in September 2026, bringing a feature the company had been testing for several weeks to all users of the browser on iPhone.
The new option blocks most third-party ads and trackers before they load, which Mozilla says reduces bandwidth use and declutters mobile websites. The feature is powered by Apple’s WebKit Content Blocker technology combined with the EasyList filter, meaning no separate extension download is required.
Ad blocking is disabled by default. Users can enable it by navigating to Settings > Browsing > Ad Blocker within the Firefox iOS app. It can also be toggled on or off during an active browsing session through the site menu.
Not all ads are affected. Mozilla notes that ads served directly by a website and ads appearing in search results will still be shown. Sponsored shortcuts and other sponsored content displayed on Firefox’s new tab page are also excluded from blocking.
Firefox joins a group of mobile browsers that already offer similar functionality on iOS. Brave, Vivaldi, and Opera are among the rivals that have had built-in ad blockers on the platform prior to this launch.
Source: The Verge