Firefox is now the last major browser that still supports uBlock Origin

Microsoft’s move isn’t surprising, as Edge is based on Chromium, the open-source browser engine that powers most web browsers today, including Opera, Brave, Vivaldi, and Samsung Browser. Google initiated the migration from Manifest V2 to V3 in Chrome/Chromium, and Microsoft Edge is now following Google’s lead.

This is officially Firefox's killer app. I will never go back to Chrome so long as uBlock Origin is supported on Firefox. — (@hispanicat7hedisco.bsky.social) 2026-08-11T13:30:56.181Z

But Firefox is one of the few web browsers remaining that isn’t based on Chromium, and it’s now the only major browser to still support uBlock Origin. Neither Safari nor DuckDuckGo—the two other major non-Chromium browsers out there—support uBlock Origin.

For die-hard uBlock Origin fans, Firefox appears to be the only browser left without compromises. With any other browser, you’ll need to settle for uBlock Origin Lite (with fewer features and less ad-blocking success) or whatever built-in ad-blocking feature comes with the browser.