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Mozilla launches built-in ad blocker for Firefox on iOS

Mozilla has officially launched an ad blocker for Firefox on iOS, using Apple's WebKit Content Blocker technology and the EasyList filter. The feature is off by default and can be enabled in settings or toggled from the site menu. It won't block all ads, as site-served ads, search result ads, and Firefox's own sponsored shortcuts remain. The rollout accompanies Firefox 155, which also expands Smart Window to more users and improves tab organization.

By Tertius News AI Desk 2 distinct · 2 mastheads · 2 articles Version 1 Coverage Sep 1–2, 2026 Published 2h ago

Mozilla has officially launched a built-in ad blocker for Firefox on iOS, marking the first time the browser offers native ad blocking on Apple's mobile platform without requiring a separate extension. The feature, announced alongside the Firefox 155 update, uses Apple's WebKit Content Blocker technology paired with the EasyList filter, a community-maintained list that identifies known ad and tracker sources. The integration is built directly into the Firefox application, as iOS ad blockers typically only work with Safari, so users don't need to download an additional extension.

How the ad blocker works

The ad blocker relies on Apple's WebKit Content Blocker technology, which is also used by Safari, combined with the EasyList filter. This combination allows Firefox to block most third-party ads and trackers before they load, reducing clutter and potentially saving bandwidth. The feature works alongside Firefox's existing Enhanced Tracking Protection, giving iOS users two layers of privacy tools.

However, the ad blocker has limitations. Ads served directly by the website itself will still appear, as will ads inside search results. Firefox's own sponsored shortcuts on the new tab page are also treated separately and won't be blocked by this feature. The ad blocker is disabled by default, but users can easily enable it by going to Settings > Browsing > Ad Blocker. During a browsing session, users can also toggle the ad blocker on or off via the site menu option.

Firefox 155 update

The ad blocker rollout coincides with Firefox 155, which brings several other changes. Smart Window, Mozilla's AI-assisted browsing feature, is expanding to more users in the US, Canada, and France, offering faster responses and smarter tab organization. The Organize Tabs feature has also been improved, now suggesting better grouping for related tabs and providing clear descriptive names for each group. The update also adds a visible tracker count in the address bar, along with a batch of smaller bug fixes across desktop and mobile.

Industry context

Firefox's new ad blocker arrives after several other iOS browsers already introduced built-in ad blocking. Brave, Opera, and Vivaldi each offer native ad-blocking capabilities on their iOS versions, positioning Firefox as a later entrant in this space. The feature is part of Mozilla's broader efforts to enhance privacy and reduce ad-based tracking across its products.

How each outlet told it

A framing line is our reading of that outlet's own text — an interpretation, not a quotation and not a fact we assert. Check it against what the outlet published.

Digital Trends

Framing: Highlights the addition of a built-in ad blocker to Firefox on iOS, emphasizing 'finally' to suggest a long-awaited feature — neutral with a slightly positive undertone

as of Sep 1, 2026, 8:17 PM UTC

Facts Included:

Mozilla officially launched Ad Blocker for Firefox on iOS today
The feature relies on Apple's WebKit Content Blocker technology paired with the EasyList filter
Ads served directly by the website itself will still show up, as will ads inside search results
Firefox's own sponsored shortcuts on the new tab page are treated separately too
You'll need to turn this on yourself, since Mozilla is keeping it off by default
First, go to Settings, then Browsing, then Ad Blocker to enable it, or toggle it quickly from the site menu
The ad-blocker works alongside Firefox's existing Enhanced Tracking Protection
Brave, Opera, and Vivaldi already offer built-in ad blocking on their own iOS browsers
This rollout lands alongside Firefox 155
Smart Window, Mozilla's AI-assisted browsing feature, is expanding to more users in the US, Canada, and France
Organize Tabs feature also got smarter
It now suggests better grouping for related tabs and gives each group a clear descriptive name
The update also adds a visible tracker count right in the address bar, plus a batch of smaller bug fixes across desktop and mobile

Read the source article →

NewsBytes

Framing: Announces the addition of a built-in ad blocker to Firefox for iOS

as of Sep 2, 2026, 7:48 AM UTC

Facts Included:

Firefox for iOS now has a built-in ad blocker
The ad blocker uses the EasyList filter list
It uses Apple's WebKit Content Blocker technology, also used by Safari
The feature is built directly into the Firefox application
iOS ad blockers only work with Safari
The ad blocker is disabled by default
Users can enable it from Settings > Browsing > Ad Blocker
Users can toggle the ad blocker on or off during a browsing session from the site menu option
The feature doesn't block all ads
Ads served directly by a website or shown in search results will still appear
Sponsored shortcuts and other sponsored content shown by Firefox when you open a new tab are also not blocked

Read the source article →

What was claimed, and who backed it

AI-extracted; can misattribute a claim — see Methodology.

Each row is one claim, attributed to the outlet whose wording states it most clearly. Confidence rates how directly the source text states the claim — explicit and unhedged rates high; hedged, pieced-together, or internally inconsistent statements rate lower. It does not measure whether the claim is true. Status is Contested when two claims on this page negate each other; otherwise it counts the distinct outlets we found asserting that specific claim — so a single-source claim can still show high confidence, and a multi-source claim can show medium. Every one of those outlets is named beside the status, so you can check the count against the list. For claims extracted before we began storing that list, the row says so: it names the outlet the claim is quoted from and states that we have not recorded which outlets backed it. Outlets wrote at different times, so a figure that evolves — a casualty count, for example — can legitimately differ between rows; check the "as of" time next to each claim's source.

Claim	Confidence	Status
ClaimMozilla officially launched Ad Blocker for Firefox on iOS.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimThe ad blocker in Firefox for iOS uses Apple's WebKit Content Blocker technology.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimThe ad blocker in Firefox for iOS uses the EasyList filter list.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimAds served directly by the website itself will still show up in Firefox for iOS.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimAds inside search results will still appear with the Firefox for iOS ad blocker.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimFirefox's own sponsored shortcuts on the new tab page are not blocked by the ad blocker.	ConfidenceHigh	StatusContested via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimSponsored shortcuts and other sponsored content shown by Firefox when you open a new tab are also not blocked by the ad blocker.	ConfidenceHigh	StatusContested via NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimThe Firefox for iOS ad blocker is disabled by default.	ConfidenceHigh	StatusContested via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimUsers can enable the Firefox for iOS ad blocker from Settings > Browsing > Ad Blocker.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimUsers can toggle the ad blocker on or off during a browsing session from the site menu option in Firefox for iOS.	ConfidenceHigh	StatusMulti-source (2 outlets · 2 distinct) via Digital Trends as of Sep 1, 2026, 8:17 PM UTC, NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimThe ad blocker in Firefox for iOS works alongside Firefox's existing Enhanced Tracking Protection.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimBrave, Opera, and Vivaldi already offer built-in ad blocking on their own iOS browsers.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimThe Firefox for iOS ad blocker rollout lands alongside Firefox 155.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimSmart Window, Mozilla's AI-assisted browsing feature, is expanding to more users in the US, Canada,and France.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimThe Organize Tabs feature now suggests better grouping for related tabs and gives each group a clear descriptive name.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimThe Firefox 155 update adds a visible tracker count right in the address bar, plus a batch of smaller bug fixes across desktop and mobile.	ConfidenceHigh	StatusSingle-source via Digital Trends as of Sep 1, 2026, 8:17 PM UTC
ClaimiOS ad blockers only work with Safari.	ConfidenceHigh	StatusSingle-source via NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimThe Firefox for iOS ad blocker feature is built directly into the Firefox application.	ConfidenceHigh	StatusSingle-source via NewsBytes as of Sep 2, 2026, 7:48 AM UTC
ClaimApple's WebKit Content Blocker technology is also used by Safari.	ConfidenceHigh	StatusSingle-source via NewsBytes as of Sep 2, 2026, 7:48 AM UTC

Transparency & Audit Trail

2 distinct · 2 mastheads · 2 articles consulted: Digital Trends, NewsBytes 19 claims extracted Version 1 Written 2026-09-02