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Mozilla adds a built-in ad blocker to Firefox on iOS, built on Apple’s WebKit API

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Mozilla has launched a built-in ad blocker for Firefox on iOS, built on Apple’s WebKit content blocker technology with the EasyList filter and switched off by default. Apple opened its browser engine to rivals in March 2024 to comply with the Digital Markets Act, and no alternative engine has shipped to a European iPhone since.

Firefox on iOS finally has a built-in ad blocker. It arrived with Firefox 155 after a few weeks of testing, Digital Trends reported.

It works on Apple’s terms rather than Mozilla’s. The feature uses Apple’s WebKit content blocker with the community-maintained EasyList filter, and it is switched off until you find it in settings.

What it cannot block is the more telling part. Ads served by the site itself remain, so do ads in search results, and Mozilla’s own sponsored shortcuts are handled separately.

Firefox is late to this by years. Brave, Opera and...

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