--- title: Mozilla adds a built-in ad blocker to Firefox on iOS,... description: Mozilla shipped a built-in ad blocker for Firefox on iOS with Firefox 155, built on Apple's WebKit content blocker API and using the EasyList filter, switched... canonical: https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API | daily.dev og:description: Mozilla shipped a built-in ad blocker for Firefox on iOS with Firefox 155, built on Apple's WebKit content blocker API and using the EasyList filter, switched... og:url: https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e og:image: https://api.daily.dev/og/posts/04FY2771E.png og:image:alt: Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API **[The Next Web](https://daily.dev/sources/tnw)** · 3 min read · 0 upvotes · 0 comments ## Summary Mozilla shipped a built-in ad blocker for Firefox on iOS with Firefox 155, built on Apple's WebKit content blocker API and using the EasyList filter, switched off by default. The feature cannot block site-served ads, search ad results, or Mozilla's own sponsored shortcuts. Firefox arrives years after Brave, Opera, and Vivaldi already shipped similar blocking on iOS. The underlying story is that Apple's BrowserEngineKit, opened in March 2024 under the EU's Digital Markets Act to let rival engines run on iPhones, still has no adopter two and a half years later - Google and Mozilla have prototyped alternative engines but not released them, and Microsoft measured a Blink prototype 28.6% faster than WebKit on Speedometer 3.1. Open Web Advocacy is pushing the European Commission to intervene. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Does Firefox for iOS have a built-in ad blocker now? Yes, Firefox on iOS added a built-in ad blocker starting with Firefox 155, built on Apple's WebKit content blocker API and using the community-maintained EasyList filter. It ships switched off by default and must be enabled in settings. It cannot block ads served directly by a website, ads in search results, or Mozilla's own sponsored shortcuts, which are handled separately. _Track how Firefox iOS features evolve under Apple's WebKit rules on daily.dev._ ### Why can't Firefox use its own rendering engine on iPhone in the EU despite the Digital Markets Act? Apple opened BrowserEngineKit in March 2024, with iOS 17.4, to comply with the DMA and let rival engines run on iPhones in the EU, but no browser maker has shipped an alternative engine two and a half years later. Google and Mozilla have both prototyped their own engines without releasing them, and Mozilla said Apple's implementation would force it to build and maintain two separate browsers. _Developers weighing browser engine choices can follow the DMA compliance saga on daily.dev._ ### How much faster is Blink than WebKit according to Microsoft's testing? Microsoft's engineers measured a Blink prototype running 28.6% faster than WebKit on the Speedometer 3.1 benchmark, tested on the same device. This performance gap underpins arguments from Microsoft and Open Web Advocacy that Apple's WebKit-only requirement on iOS imposes a real cost on browser performance in the EU market. _Anyone benchmarking browser engines can keep tabs on WebKit versus Blink comparisons via daily.dev._ ## Similar posts on daily.dev - [Reduce clutter and distractions with Ad Blocker for Firefox on iOS](https://daily.dev/posts/reduce-clutter-and-distractions-with-ad-blocker-for-firefox-on-ios-njuqi2uuw) · Mozilla · 0 upvotes · 0 comments - [Mozilla adds ad blocking to Firefox for iOS](https://daily.dev/posts/mozilla-adds-ad-blocking-to-firefox-for-ios-8f5g8ynit) · The Register · 0 upvotes · 0 comments - [Firefox helps iPhone users bypass ads on web sites while making money showing its own ads](https://daily.dev/posts/firefox-helps-iphone-users-bypass-ads-on-web-sites-while-making-money-showing-its-own-ads-usqyhc7tg) · The Register · 0 upvotes · 0 comments - [Firefox Has Quietly Integrated Brave's Adblock Engine](https://daily.dev/posts/firefox-has-quietly-integrated-brave-s-adblock-engine-icdbdfmgl) · It's Foss · 205 upvotes · 35 comments --- Tags: [#ios](https://daily.dev/tags/ios), [#firefox](https://daily.dev/tags/firefox), [#safari](https://daily.dev/tags/safari) [View this post on daily.dev](https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API","url":"https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e"},"datePublished":"2026-09-01T20:31:04.242Z","dateModified":"2026-09-02T13:12:24.239Z","description":"Mozilla shipped a built-in ad blocker for Firefox on iOS with Firefox 155, built on Apple's WebKit content blocker API and using the EasyList filter, switched...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/9558508273b3af611d53cb0395b423e3?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/9558508273b3af611d53cb0395b423e3?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"The Next Web","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"The Next Web","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/tnw","url":"https://daily.dev/sources/tnw"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ios,firefox,safari","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The Next Web","item":"https://daily.dev/sources/tnw"},{"@type":"ListItem","position":3,"name":"Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/mozilla-adds-a-built-in-ad-blocker-to-firefox-on-ios-built-on-apple-s-webkit-api-04fy2771e#faq","mainEntity":[{"@type":"Question","name":"Does Firefox for iOS have a built-in ad blocker now?","acceptedAnswer":{"@type":"Answer","text":"Yes, Firefox on iOS added a built-in ad blocker starting with Firefox 155, built on Apple's WebKit content blocker API and using the community-maintained EasyList filter. 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