The Company That Lives on Ads Is Killing Your Ad Blocker

If you use an ad blocker, you’ve probably seen the notice: uBlock Origin disabled in Chrome, flagged as an extension that’s “no longer supported.” It’s not a bug. It’s the rollout of a plan Google has telegraphed for years. And at the heart of the story sits one fact nobody can really argue with: the company that loses money when ads get blocked is the same company writing the rules for how ad blockers are allowed to work.

What Manifest V3 Actually Changed

Browser extensions talk to the browser through a fixed rulebook. That rulebook is called the Manifest. Chrome ran on Manifest V2 for years. Google is now forcing the switch to V3.

The biggest change is the fate of one feature: the webRequest API. Under V2, an extension could watch every network request a page tried to make, in real time, and kill any request headed for an ad server on the spot. That’s exactly how a heavyweight blocker like uBlock Origin worked.

V3 effectively seals that off. In its place, Google offers declarativeNetRequest. The extension submits a list of rules up front — “please block addresses that look like this” — and the browser handles the actual blocking. The blocker no longer sees the requests itself.

Why This Is a Problem

On the surface, it sounds reasonable. Google frames V3 as a win for security, performance, and privacy. And it’s true that an extension with permission to inspect all your traffic is a juicy target — shrink that power and you shrink the risk from malicious extensions.

The catch is rule limits and flexibility. The pre-submitted rule list has a hard cap. uBlock Origin runs hundreds of thousands of filter rules, updated dynamically to keep pace with ad-tech that evolves week to week. Under V3, holding onto that scale and that real-time responsiveness gets very hard.

The result: uBlock Origin’s developer had to ship a stripped-down separate version called uBlock Origin Lite. The “Lite” in the name says it all. It’s not the same blocker with a new coat of paint. It’s the same blocker with its hands tied.

This Is Really About Trust

Here’s where the conflict of interest snaps into focus. Look at Google’s revenue and an overwhelming share comes from advertising — showing ads and getting clicks is the foundation of the business. And the browser that business built holds the dominant share of the global desktop market.

So a company that makes its money from ads gets to unilaterally set the rules for the tools people use to block those ads. That’s the core of it. This doesn’t mean Google’s security argument is a lie. It means the security argument and the company’s financial interest happen to point in exactly the same direction — and that’s what makes people uneasy.

You can see the sentiment in the numbers. Tech YouTubers covering this topic have racked up views ranging from tens of thousands to nearly a million. A Mental Outlaw video on the subject from 2022 cleared 980,000 views and over 47,000 likes. The titles all rhyme: “Google is killing ad blockers.” The framing is deliberately hot, but it’s a signal — a lot of users genuinely read the change that way.

So What Do You Actually Do

You’re not out of options. The alternative that comes up most is Firefox. Mozilla adopted Manifest V3 but committed to keeping the old webRequest approach alongside it. Translation: the full-fat uBlock Origin keeps working in Firefox.

If you’d rather not leave the Chromium world entirely, browsers like Brave run the same engine but take a different policy line. Some bake ad blocking directly into the browser, which insulates you from extension-policy changes.

You can also filter ads at the DNS or network layer — think of a device-wide block list. The trade-off is that these methods don’t catch things as precisely as a browser extension can.

The Takeaway

The question this change raises is simple. Is it really fine that the browser you use every day is built by the company that profits from the very ads you’re trying to block? Technically, Manifest V3 may well be the safer architecture. But it’s worth asking who gets to define “safer,” and who benefits from that definition. So which is it for you — stay with the Chrome you know and watch the ads, or switch browsers to keep your blocker alive?