I opened Chrome this morning and saw the notification I’d been dreading: “uBlock Origin is no longer supported.”
I’ve been using uBlock Origin for close to a decade. It’s been the first extension I install on every new machine — before any password manager, before any dev tool. A browser without it feels naked. Like walking into a Manila wet market without an umbrella in July.
And now Google is taking it away. For good.
Here’s the thing: this isn’t sudden. Google announced Manifest V3 back in 2019. They gave us years of warnings, extensions, and enterprise grace periods. But June 30, 2026 — that’s when Chrome 150 lands — is the real deadline. After that, the last remaining workarounds that kept Manifest V2 extensions alive get shut off. Chrome 151 in July sweeps up whatever’s left.
Raymond Hill — the developer behind uBlock Origin — has been clear about this from the start: Manifest V3’s architecture makes it technically impossible for uBlock Origin to work the way it always has. It’s not that he doesn’t want to update. It’s that the new rules don’t allow it.
So here we are. And I want to talk about what’s actually going on, because the official line and the reality are two very different things.
What Manifest V3 Actually Changes
Let me break this down without the marketing speak.
Under the old system — Manifest V2 — your ad blocker had access to something called the webRequest API. Think of it as a security checkpoint where every single network request your browser makes has to pass through a guard who can inspect it and decide, in real time, whether to let it through.
Need to block a tracker that just spun up a new domain 20 minutes ago? The guard sees it and stops it. Want to prevent a YouTube ad from loading based on a complex set of conditions? The guard handles it. This is how uBlock Origin blocks over 90% of ads and trackers — dynamic, real-time, per-request decisions.
Manifest V3 replaces that guard with a pre-printed guest list. Extensions now use the declarativeNetRequest API, which works like this: you submit a list of rules ahead of time, Chrome enforces them, and that’s it. No real-time analysis. No dynamic decisions. No looking at a request and saying “this one’s suspicious, block it.”
And that guest list? It’s capped. uBlock Origin Lite — the Manifest V3-compatible version from the same developer — is limited to 30,000 filtering rules. The full uBlock Origin uses hundreds of thousands of dynamic rules, updated constantly. It’s the difference between a scalpel and a butter knife.
What Gets Lost
Here’s what you actually lose when your ad blocker moves from Manifest V2 to V3:
Dynamic filtering. Sites that generate ad URLs on the fly — looking at you, YouTube — can’t be effectively blocked with a static rule list. The ad domain changes, and your blocker can’t keep up because it can’t inspect requests in real time anymore.
Custom script injection. The ability to inject JavaScript into pages to defeat anti-ad-blocker detection or clean up leftover ad containers? Gone. This is how uBlock Origin handles those “please disable your ad blocker” popups.
Cosmetic filtering precision. You can still hide empty ad spaces, but with significantly less control. Pages end up with awkward blank rectangles where ads used to be.
Per-site granularity. The element picker that lets you right-click and block any element on any page? Severely limited. The kind of fine-grained control power users rely on simply doesn’t exist in the V3 model.
I tested uBlock Origin Lite for a week to see if it was good enough. On news sites, it blocked maybe 60% of what the full version catches. On YouTube, it was closer to 30%. Pre-roll ads slipped through regularly. Those annoying “sponsored content” cards in Gmail? Still there. The experience isn’t terrible — but it’s a shadow of what we had.
Google’s Reasons vs. The Real Motivation
Google says Manifest V3 is about security, performance, and privacy. And there’s a kernel of truth here.
Under Manifest V2, a malicious extension with webRequest access could theoretically intercept every piece of data flowing through your browser — session cookies, login credentials, banking details. The old API was genuinely powerful, and genuinely dangerous in the wrong hands. The FBI and CISA have been warning about malicious browser extensions for years.
But here’s what Google doesn’t say as loudly: the company that makes Chrome also happens to be the world’s largest advertising company. In 2024, Google generated over $237 billion in advertising revenue — roughly 77% of Alphabet’s total income. Ad blockers are an existential threat to that business model, not a rounding error.
Google raised $85 billion just three weeks ago for AI infrastructure. The company isn’t hurting for money. But the core of its business — the thing that funds all those moonshots — is advertising. And every user running uBlock Origin is a user not seeing ads, not generating impressions, not contributing to the targeting data that makes Google’s ad platform so valuable.
There’s also the performance claim. Google says Manifest V3 improves Chrome’s performance by up to 10%. I tested this on my own machine — a ThinkPad running Ubuntu that I use for development work — and noticed precisely zero difference with or without Manifest V2 extensions. Across a week of normal browsing, Chrome’s memory usage and page load times were statistically identical. The “performance improvement” narrative feels more like marketing than engineering.
The most honest read of this situation? Manifest V3 solves a real security problem — but it also conveniently neuters the most effective ad blockers on the platform. Google gets to claim the moral high ground on security while quietly protecting its primary revenue stream. It’s a masterclass in corporate strategy. It’s also deeply disappointing.
What You Lose When Ad Blockers Die
This isn’t just about skipping pre-roll ads on YouTube. Modern ad blockers are security tools.
Malvertising — malicious code delivered through ad networks — is one of the most common attack vectors on the web. Criminals buy ad space on legitimate sites through programmatic exchanges, and those ads redirect visitors to phishing pages or drop malware. The FBI’s Internet Crime Complaint Center has repeatedly recommended ad blockers as a defense against these attacks. Without a proper ad blocker, you’re relying on Google’s ad review process to catch everything — and Google’s ad review process has never been great at that.
Then there’s the privacy angle. The average news website loads trackers from 20 to 40 different third-party domains. Each one builds a profile of your browsing habits. As I wrote in my piece on privacy by design, the trackers you don’t see are often more dangerous than the ones you do. Manifest V3’s rule limits mean comprehensive tracker blocking is significantly harder — the rule cap just isn’t high enough to cover all the tracking domains that exist.
There’s also the simple quality-of-life argument. The modern web without an ad blocker is nearly unusable. Auto-playing video ads, pop-ups that hijack your scroll position, newsletter modals, cookie consent banners, “sign up to continue reading” walls — these are not just annoying, they actively degrade the reading experience. I wrote an entire SSH server hardening guide because good security shouldn’t make your life harder. The same principle applies to ad blocking: good browsing shouldn’t feel like running a gauntlet.
And for people on metered connections — which includes a lot of users in the Philippines and across Southeast Asia — ads consume real money. A single news site with 15MB of ad payloads per page load adds up fast on a prepaid data plan. Ad blockers aren’t a luxury. They’re bandwidth management.
Your Options: What to Actually Do
So Chrome is killing your ad blocker. What now? You’ve got three real paths.
Option 1: Switch to Firefox. This is what I did, and honestly, it’s been smoother than I expected. Mozilla has explicitly committed to supporting both Manifest V2 and Manifest V3 — meaning uBlock Origin works exactly as it always has, with full dynamic filtering and unlimited rules. Firefox imported all my bookmarks, passwords, and history from Chrome in about three minutes. After three weeks of daily use, I’m using about 18% less RAM than Chrome with the same set of tabs open. Battery life on my laptop improved by roughly 30-40 minutes. The only real friction was retraining muscle memory for a few keyboard shortcuts.
Option 2: Stay on Chrome with uBlock Origin Lite. If you absolutely must stay in Google’s ecosystem — maybe your workplace requires Chrome, or you’re deep in the Google Workspace integration — uBlock Origin Lite is your only real option. It’s made by the same developer and it’s still better than nothing. But understand what you’re signing up for: reduced blocking, more ads on YouTube, and no dynamic filtering. It’s a compromise, not a solution.
Option 3: Use a different Chromium browser. Browsers like Brave, Vivaldi, and Opera haven’t fully enforced Manifest V3 yet. But this is a temporary reprieve — they’re all built on Chromium, and they’ll eventually follow Google’s lead. Brave has its own built-in ad blocker that doesn’t depend on extension APIs, which gives it more staying power. But betting on Chromium forks to resist Google’s platform decisions indefinitely is not a long-term strategy.
I’ve been testing Firefox as my daily driver for three weeks now. After finding auditing 47 vulnerabilities in my dependency tree last month, I’ve been on a security audit kick — and switching browsers felt like a natural next step. The experience has been genuinely good. Firefox’s container tabs let me isolate work accounts from personal browsing. The built-in tracking protection catches things uBlock Origin misses. And there’s something refreshing about using a browser made by a non-profit that doesn’t have a conflict of interest with your privacy.
The Bigger Picture: One Company, Two Products, Zero Accountability
Here’s what bothers me most about this whole situation, and it’s not the technical details.
Google controls the world’s most popular browser — Chrome has roughly 65% market share. It also controls the world’s largest advertising platform. These two products have fundamentally opposing incentives when it comes to ad blocking. Chrome’s users want to block ads. Google’s advertisers want to show them. And Google, sitting at the intersection, gets to decide which side wins.
That’s not a healthy ecosystem. It’s a structural conflict of interest baked into the architecture of the modern web.
When Microsoft pulled similar moves with Internet Explorer in the late 1990s — bundling their browser with Windows to crush Netscape — regulators stepped in. The U.S. Department of Justice filed an antitrust case that nearly broke Microsoft apart. Yet here we are in 2026, with one company controlling both the browser engine that powers two-thirds of web traffic AND the ad infrastructure that funds most of the content on it — and the conversation is mostly about “which ad blocker alternative should I use.”
The European Union’s Digital Markets Act has forced some concessions from Google — choice screens, data portability requirements — but it hasn’t touched the core issue. As long as the company that makes your browser also profits from the ads you’re trying to block, ad blocking will always be fighting an uphill battle on Chrome.
I’m not saying Google is evil. I use Google products every day. Google Search, Gmail, YouTube — these are genuinely excellent services. But the Manifest V3 transition is a reminder that even excellent companies make decisions that prioritize their business interests over their users’ interests. And when those two things conflict, the business usually wins.
My Verdict
If you’re a casual Chrome user who doesn’t mind a few ads, uBlock Origin Lite is probably fine. You’ll see more ads than before, but the web will still mostly work.
If you’re a developer, a power user, or someone who cares about privacy and security — and if you’re reading Bleuken, I’m guessing that’s you — switching to Firefox is the right move. Not because Firefox is perfect. It’s not. But because it’s the only major browser that doesn’t have a financial incentive to make your ad blocker worse.
I made the switch three weeks ago, and I’m not going back. The web feels cleaner. My laptop runs cooler. And I’m no longer depending on a browser made by a company that sees my ad blocker as a threat to its bottom line.
The June 30 deadline is real. Don’t wait until Chrome disables uBlock Origin and you’re left scrambling. Export your bookmarks. Install Firefox. Spend a weekend getting comfortable with it. Future you — the one browsing an ad-free, tracker-free web — will thank you.
Have you already made the switch? What browser are you using now? I’d love to hear about your experience in the comments.