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Is AdBlocker Ultimate safe?

This security report analyses whether AdBlocker Ultimate is safe to install on your browser. We check AdBlocker Ultimate for malicious behaviour, data exfiltration, suspicious permissions, and known vulnerabilities so you can decide if AdBlocker Ultimate is safe for your personal or enterprise fleet.

Low risk

Legitimate ad-blocking extension implementing standard filter-based blocking via declarativeNetRequest and scriptlet injection. Minor findings include an external Font Awesome CDN load in options.html and a companion desktop-app sync feature that transmits user-defined filter rules to self.adblockultimate.net when the companion app is detected.

0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 10 April 2026ohahllgiabjaoigichmmfljhkcfikeof

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