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uBlock Origin

uBlock Origin

Open sourceFree

Efficient wide-spectrum content blocker

Overview

Open-source browser extension that blocks ads, trackers, and malware domains using filter lists. Extremely lightweight — blocks more while using less memory than alternatives.

Visit siteSource code

Referenced in

Practices using uBlock Origin

Browser Extensions Audit

Essential content blocker. Open-source, no data collection.

Post-Cookie Tracking

Blocks trackers, ads, and CNAME cloaking attempts.

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