Why did uBlock Origin stop working on Chrome?

Google's Manifest V3 API replaced the webRequest API with declarativeNetRequest, which cannot do real-time request interception. uBlock Origin's core filtering engine requires the old API.

Is there a Chrome extension that blocks ads like uBlock Origin did?

No Chrome extension in 2026 matches full uBlock Origin. AdGuard comes closest on Chrome (MV3). For full capability, Firefox is the only mainstream option.

What is Manifest V3 and why does it matter for ad blocking?

Manifest V3 is Chrome's new extension platform that restricts background processing and replaces dynamic network interception with a static declarative rule system, capping rules at 330,000.

Can I still use uBlock Origin in 2026?

Yes, on Firefox, Brave, and LibreWolf. Not on Chrome or Edge. Chrome 150+ removed the last workaround flag.

How many people were affected when uBlock Origin was removed from Chrome?

uBlock Origin had 50 million Chrome installs at the time of removal.

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Chrome Manifest V3 Killed uBlock Origin for 50M Users

Google Chrome's Manifest V3 transition permanently disabled uBlock Origin as of mid-2025, stripping 50 million Chrome users of their primary ad blocker. The new declarativeNetRequest API cannot replicate uBlock's real-time request interception. uBlock Origin Lite exists but blocks far fewer ads. Users must switch to Firefox or Brave to keep full ad blocking.