After 20 years of loyalty to Firefox on desktop, the browser’s new built-in ad blocker on iOS could finally persuade long-time users to switch from Safari by blocking many annoying and privacy-invasive ads natively.
- Firefox iOS app adds native ad blocker blocking many ads and trackers
- Feature is disabled by default but can be enabled via settings or menu
- Safari lacks built-in ad blocking, requiring third-party extensions
What happened
Mozilla has begun rolling out an experimental ad blocker feature within the Firefox app on iOS. The blocker utilizes the widely recognized EasyList filter to prevent numerous ads from loading, including third-party advertising networks, trackers, pop-ups, and overlays. This rollout is gradual and the feature remains disabled by default, with users needing to opt in through the app’s settings. Firefox maintains exceptions for sponsored content on its home and new tab pages as well as search engine ads to preserve its primary revenue streams.
Prior to this update, Firefox users on iOS had to rely on external extensions for ad blocking or accept the absence of built-in protections, unlike its desktop counterpart. Meanwhile, Safari on iOS supports blocking pop-ups but does not offer native ad blocking and depends on third-party apps for a more comprehensive ad filtering experience.
Why it matters
The introduction of a native ad blocker in Firefox for iOS marks a significant step in improving user privacy and browsing experience on mobile devices. Ads and trackers increasingly hinder site usability and compromise privacy, incentivizing browsers to provide built-in defenses. By integrating EasyList-based blocking, Firefox aligns with user demands for seamless ad control without additional downloads or configurations.
This move could shift the competitive landscape in mobile browsers, especially given Firefox’s strong privacy reputation. Long-time Firefox desktop users who previously stuck with Safari on mobile due to lack of similar features now have a compelling reason to switch, potentially increasing Firefox’s iOS user base. It also highlights the growing importance of privacy features as a differentiator in browser choice.
What to watch next
It will be important to monitor how widely the new ad blocking feature is adopted by Firefox iOS users and whether this drives a measurable migration away from Safari. User feedback on effectiveness, compatibility with websites, and any impact on browsing performance will also be critical in determining the feature’s success and future development.
Additionally, Mozilla’s approach to balancing ad blocking with revenue considerations, such as not blocking sponsored content on Firefox’s own pages, could signal how privacy-focused browsers sustain business models in a landscape reliant on advertising. Expansion of this experimental feature and its integration into stable releases will reveal how aggressively Mozilla pursues privacy-first capabilities on mobile.