{ "story_id": "1d6e29401848f26d7ef021be4869c8f6", "desk": "drm3", "revision": 1, "published_at": "2026-09-01T20:41:28.000Z", "content_hash": "9ede03781267996ae6b3d1cc4ad515865478b95744bb3451d40038eb330aa419", "hash_basis": "sha256 over `headline\\ndek\\nprose`, plus `\\n` + the canonical citations JSON when any source is placed, plus `\\n#blog` for blogs", "basis": { "headline": "Mozilla Adds Built-In Ad Blocker to Firefox for iOS", "dek": "Mozilla announced a new ad-blocking feature for Firefox on iOS using Apple's WebKit API.", "prose": "Mozilla announced on September 1, 2026, that it is adding a built-in ad blocker to Firefox for iOS. [^1]\n\nMozilla launched built-in ad blocking for the Firefox browser on iOS devices. [^2]\n\nMozilla officially launched ad blocking for Firefox on iOS today after testing the feature over the past few weeks. [^3]\n\nMozilla officially rolled out native ad blocking for Firefox on iOS devices following a slow experimental period. [^4]\n\nMozilla announced the addition of a new feature called Ad Blocker for Firefox on iOS devices, which blocks many third-party ads and ad-related trackers. [^5]\n\nAd blocking is turned off by default and can be enabled in Settings > Browsing > Ad Blocker. [^6]\n\nThe new ad blocker uses the EasyList filter list and Apple's WebKit Content Blocker technology. [^7]\n\nMozilla configured the feature to use the EasyList filter list for blocking content. [^8]\n\nThe new ad blocking feature utilizes Apple's WebKit Content Blocker API to operate on iOS. [^9]\n\nFirefox's ad blocking capability can also block ad-related trackers, pop-ups, and overlays. [^10]\n\nThe new built-in option will block most third-party ads and trackers before they load on an iPhone, reducing bandwidth use and decluttering mobile websites. [^11]\n\nThe new Firefox feature can block third-party ad networks, exchanges, and many third-party ads served on websites at the network level. 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