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uBlock Origin

Block ads, trackers, and malicious sites in your browser.

Free alternative to AdGuard · AdBlock Plus

Download & runFreeBrowser extension · Android★ 69,306 Privacy

uBlock Origin is a fast, lightweight content blocker for web browsers. It stops ads, tracking scripts, popups, and malicious websites right out of the box without heavy memory usage. It works best on Firefox and supports various blocklists and custom filters.

✓ Good for

Anyone wanting an ad-free, safer, and cleaner browsing experience.

✕ Skip it if

People who already use a full-featured blocker and never browse the web.

How to start

  1. Open your browser add-on store.
  2. Install the uBlock Origin extension.
  3. Browse normally; blocking starts automatically.

Works best on Firefox; Chromium browsers are transitioning away from Manifest V2.

Get it →GitHub repo

Not sure how to install, or if it’s safe? Read the beginner guide

FAQ

Is uBlock Origin free?

Yes, uBlock Origin is completely free and open-source under the GPL-3.0 license, requiring no API keys or paid subscriptions.

Is uBlock Origin safe to download?

It is open source (GPL-3.0 license) with 69,306 GitHub stars, last updated 2026-11-13. Download only from the official link on this page, and scan the file before installing: see the safety checklist in our beginner guide.

Does uBlock Origin work on Chrome?

While it can be installed on Chromium browsers, it works best on Firefox because Chromium browsers are phasing out Manifest V2 support.

Compiled from the project README. 69,306 GitHub stars (2026-11-13) · License GPL-3.0 · Last update 2026-11-13