By ByteBot
Google completed its Manifest V2 purge on August 31, 2026. Every remaining MV2 extension — including uBlock Origin, the most widely used ad blocker on the web — was removed from the Chrome Web Store. You can no longer install it. Existing installs will not receive updates. The story hit the top of Hacker News this morning with 441 points and 358 comments, which tells you everything about how developers feel about it.
This has been coming since 2023, but the final deadline always seemed far away. It isn’t anymore. If you or your users are Chrome-only and were relying on full uBlock Origin, you need a plan today.
Why uBlock Origin Can’t Work on Chrome Anymore
The problem isn’t the extension itself — Raymond Hill (gorhill), uBlock Origin’s developer, has confirmed he will never port the full version to Manifest V3. The problem is that MV3 removed the technical foundation uBlock Origin was built on.
Manifest V2 gave extensions access to the webRequest API, which let uBlock Origin intercept every network request and make real-time blocking decisions in JavaScript. Manifest V3 replaced that with declarativeNetRequest, a static rule system evaluated by Chrome’s engine — no dynamic JavaScript, no response body modification, no real-time adaptation.
The rule cap is where it breaks down completely. MV3 allows up to 330,000 static rules per extension — Google raised this from 30,000 after significant pressure, but the number doesn’t matter. Full uBlock Origin uses millions of filter rules, updated dynamically. uBlock Origin Lite, the official MV3 version, ships with roughly 17,000. That’s not a tradeoff; it’s a different product.
What You Have Now
These are your real options, ranked by blocking effectiveness:
| Option | Full uBO Parity? | Cost | Browser |
|---|---|---|---|
| Firefox + uBlock Origin | Yes — 100% | Free | Firefox only |
| Brave Browser | Yes — full MV2 | Free | Brave (Chromium) |
| uBlock Origin Lite | No — ~17K rules | Free | Chrome |
| AdGuard Desktop App | Comparable | ~$30/yr | All browsers |
| DNS blocking (Pi-hole, NextDNS) | Partial | Free/cheap | All devices |
Firefox + uBlock Origin (Full) — This is the answer for anyone who cares about blocking performance. The full uBlock Origin runs without limitations on Firefox. No rule caps, no static-only rules, no restrictions. Mozilla explicitly chose to support dynamic filtering. Firefox is no longer just a backup browser; it’s the only major browser where your ad blocker actually works as advertised.
Brave Browser — Brave runs on Chromium but has broken from Google’s extension policy. The team independently hosts four MV2 extensions: uBlock Origin, AdGuard, uMatrix, and NoScript. You get the full ad blocker in a browser that largely looks and behaves like Chrome. Vivaldi also supports MV2 extensions.
uBlock Origin Lite (Chrome) — gorhill’s official MV3 extension, available on the Chrome Web Store. It blocks a meaningful portion of ads and trackers, and it’s free. But if you were using advanced features — dynamic filtering, cosmetic element hiding, per-site rules — those are gone. For casual browsing, it’s adequate. For power users, it isn’t.
System-Level Blocking — AdGuard’s desktop app filters all traffic at the OS level, bypassing Chrome’s extension API entirely. Unlimited rules, real-time filtering across every browser and app on your machine. Around $30 per year. If switching browsers isn’t an option, this is the strongest Chrome-compatible alternative.
The Part Nobody at Google Will Say Out Loud
Google is the world’s largest advertising company. Google makes Chrome. Google designed Manifest V3. These facts are worth holding together when evaluating the official rationale — that MV3 is about security, performance, and user privacy.
The EFF put it plainly: “Manifest V3 is another example of the inherent conflict of interest that comes from Google controlling both the dominant web browser and one of the largest internet advertising networks.” The Electronic Frontier Foundation documented this concern as far back as 2021, and nothing since has made the argument less valid.
The most telling detail: Mozilla supports dynamic filtering in Firefox without strict rule caps. That undercuts the claim that Google’s constraints were the only technically sound path. They weren’t. They were a choice — and it happens to be a choice that makes ad blocking measurably weaker in the browser Google profits from showing ads in.
What to Recommend to Users
If your users ask what to do, the honest answer has two parts. For anyone who cares about privacy and blocking effectiveness: switch to Firefox or Brave. uBlock Origin works there without compromise. For users locked into Chrome who won’t switch: uBlock Origin Lite is better than nothing, and the timeline for this change was long enough that no one should be surprised by it at this point.
The browser monoculture we’ve allowed Chrome to become has a real cost. This week, that cost is your ad blocker.
