AdGuard vs uBlock Origin: Which Ad Blocker Should You Use?

AdGuard and uBlock Origin are the two names that come up every time someone asks which ad blocker actually works in 2026. Both block ads, trackers, and pop-ups. Both are trusted by millions. And both refuse to play the “acceptable ads” game that lets advertisers pay their way through.

The short answer: which browser you use now decides this more than which blocker is “better.” On Firefox, uBlock Origin remains the most powerful content blocker ever made — free, open source, and untouched by Google’s rule changes. On Chrome, Edge, or any Chromium browser, the full uBlock Origin is gone: Google disabled Manifest V2 extensions in July 2025 and removed the last of them from the Chrome Web Store on August 31, 2026. So Chrome users are really choosing between uBlock Origin Lite (the free, lighter successor by the same developer) and AdGuard (a free browser extension plus paid apps that filter your entire device and sidestep Chrome’s extension rules completely). If you want blocking that covers apps and games as well as the browser, AdGuard’s paid apps are the only option of the two.

Testing note: I installed both extensions from their official Chrome Web Store listings on October 23, 2026 — uBlock Origin Lite 2026.1021.1354 (Raymond Hill) and AdGuard AdBlocker 5.5.3.22 (Adguard Software Limited) — and attempted the two best-known public ad-blocking tests. The d3ward adblock tester has been retired (its page now shows only an archived-project notice), and the remaining canyoublockit.com check is a manual visual test that cannot fairly isolate two blockers installed in the same browser. So instead of invented scores, this comparison is built on the developers’ own documentation, Google’s official Manifest V3 timeline, and each company’s published pricing — every spec below verified against the official pages on October 23, 2026: ublockorigin.com and its Lite guide, Raymond Hill’s uBlock GitHub repository, AdGuard’s license page and press room, and Google’s official Manifest V2 deprecation timeline. AdGuard’s prices shift with frequent promotions and region — re-check the license page before buying.

What is uBlock Origin, exactly?

uBlock Origin is a free, open-source content blocker created and maintained by Raymond Hill (known online as gorhill), first released in 2014. Its source code is public on GitHub under the GPLv3 license, where the project has collected nearly 69,000 stars — one of the most-starred browser extensions on the platform. Hill’s own description is blunt: “Free. Open-source. For users by users. No donations sought.”

It’s deliberately more than an ad blocker. uBlock Origin is a wide-spectrum content blocker: it blocks ads, trackers, coin miners, pop-ups, and known malicious domains by default, using community-maintained filter lists — EasyList, EasyPrivacy, Peter Lowe’s blocklist, a malicious-URL blocklist, and uBlock Origin’s own lists. It supports the EasyList filter syntax plus its own extended syntax, and it can import hosts files.

What made it legendary is the advanced toolkit: dynamic filtering (a point-and-click firewall for allowing or blocking scripts and frames per site, in real time), the element picker (click any page element — an ad slot, a newsletter overlay — and hide it permanently), a request logger, and per-site switches for pop-ups, cosmetic filtering, remote fonts, and JavaScript. Low CPU and memory usage is the project’s founding principle.

Two trust facts matter. First, uBlock Origin has no acceptable-ads program — unlike AdBlock Plus, it has no commercial relationships with advertisers, so community filter lists decide what gets blocked, not who paid. Second, the project is so allergic to monetization that it does not accept donations at all — Hill tells supporters to donate to the filter-list maintainers instead. No paid tier, no premium version, no upsells.

The hard limit: uBlock Origin is browser-only by design. It works in the browser where you install it. It does nothing for other apps, games, or devices — Hill’s own site states this plainly.

What is AdGuard, exactly?

AdGuard is a commercial product from AdGuard Software Limited, founded on June 1, 2009 and headquartered in Limassol, Cyprus. The company says over 160 million users trust its products, and it describes itself as funded by its users rather than advertisers. It is open-source at heart in the parts that matter for trust — the browser extension, its filter lists, and dozens of other modules are public on GitHub.

AdGuard is really two products. The AdGuard browser extension is free and works on Chrome, Firefox, Edge, and Safari. Then there are the paid standalone apps for Windows, Mac, Android, iOS, and Android TV, which filter traffic system-wide — every browser plus apps, games, and anything else on the device.

The paid apps unlock what the extension can’t do alone: Stealth Mode (anti-tracking and anti-fingerprinting), HTTPS filtering (a local certificate lets it filter encrypted traffic, which is how it catches YouTube ads in the browser), DNS filtering (AdGuard DNS with encrypted DoH/DoT and custom servers), and parental controls. Like uBlock Origin, AdGuard states plainly that it does not allow so-called acceptable ads.

The pricing model is freemium with a twist: the browser extension costs nothing, and you only pay if you want the system-wide apps. Personal licenses cover 3 devices and Family licenses cover 9, each available as a yearly subscription or a one-time lifetime purchase, and the licenses are universal across Windows, macOS, Android, and iOS. AdGuard backs purchases with a 30-day money-back guarantee.

What happened with Manifest V3 — and why is it the whole story?

This is the event that turned a simple “which is better” question into a “which browser are you on” question. Here’s the official timeline, from Google’s own Manifest V2 support timeline (updated September 9, 2026):

• June 2024: Chrome starts showing warning banners for Manifest V2 extensions on beta and canary channels.
• October 2024: Google begins disabling installed Manifest V2 extensions on the stable channel.
• March 2025: MV2 extensions disabled by default for everyone — users can still turn them back on, for a while.
• July 24, 2025 (Chrome 138): Manifest V2 is disabled everywhere. Users can no longer re-enable MV2 extensions. The enterprise policy exception is removed with Chrome 139.
• August 31, 2026: All remaining Manifest V2 extensions are removed from the Chrome Web Store. They can’t be reinstalled or updated anymore. Raymond Hill’s GitHub repository records it in one line: “Chrome Web Store: Removed on 2026-08-31.”

The technical reason matters. Full uBlock Origin was built on Manifest V2’s webRequest API, which let it inspect and block network requests dynamically, in real time. Manifest V3 replaces that with declarativeNetRequest — the browser applies pre-declared rule lists instead, with a cap on how many rules an extension can use. Hill’s position is that there is no full-featured Manifest V3 version of uBlock Origin, and there never will be.

What he built instead is uBlock Origin Lite — a separate, free, open-source extension designed for Manifest V3, with four simple filtering modes: No filtering, Basic (network blocking only), Optimal (adds cosmetic and scriptlet filtering), and Complete (adds generic cosmetic filtering). Current versions support custom filters, external filter lists, and an element picker — but browser API limits apply, and Hill’s own documentation admits Lite is less effective on sites with anti-ad-blocking, since some full-uBO filters can’t be translated to MV3 rules. Chrome won’t convert your old install; you install Lite yourself.

Firefox is the exception that proves the rule. Mozilla kept supporting the capabilities uBlock Origin needs, so the full uBlock Origin works best on Firefox — on desktop and on Android, per the project’s own installation docs. Microsoft Edge is mid-transition: it began moving consumers from MV2 to MV3 in August 2026 and aims to finish by the end of 2026. And the scale of all this is enormous — StatCounter’s August 2026 data puts Chrome at 69.39% of worldwide page views, with all Blink-based browsers (Chrome, Edge, Samsung Internet, Opera) at 78.70%. Manifest V3 isn’t an edge case; it’s the reality for roughly two-thirds to three-quarters of the web.

Bottom line on the timeline: if you use Chrome, the uBlock Origin you remember is gone for good. The question is no longer “uBlock Origin or AdGuard” — it’s “uBlock Origin Lite or AdGuard,” unless you’re willing to change browsers.

AdGuard vs uBlock Origin: the head-to-head comparison

Here’s every difference that actually matters, in one table:

Which should Chrome users pick: uBlock Origin Lite or AdGuard?

Pick uBlock Origin Lite if you want the free, no-fuss option from the original developer. It installs in seconds, the Optimal mode is a sensible default, and you’re running software from the same Raymond Hill who built the original — not a lookalike. For everyday browsing it handles the bulk of ads and trackers well. Just know its ceiling: no dynamic filtering, reduced cosmetic filtering, and weaker results against aggressive anti-adblock.

Pick AdGuard if you want more than a browser extension. On Chromium, AdGuard’s free extension and uBO Lite play under the same Manifest V3 rules, so the browser-only comparison is close. AdGuard’s real advantage is the paid desktop and mobile apps: they filter at the system level, so Chrome’s extension limits simply don’t apply. If ads in apps, games, and desktop software bother you — not just web pages — the AdGuard app is the only tool here that reaches there.

One timing note: Microsoft Edge began its own consumer move from MV2 to MV3 in August 2026 and aims to finish by the end of 2026, so Edge users face the same Lite-or-AdGuard choice very soon.

Which should Firefox users pick?

uBlock Origin, and it’s not close. Firefox is the one major browser where the full, unrestricted uBlock Origin still runs exactly as designed — dynamic filtering, the complete element picker, the request logger, full cosmetic filtering, per-site controls. The project’s own installation guide says uBlock Origin “works best on Firefox,” on desktop and Android. AdGuard’s free Firefox extension is fine, but there’s no reason to choose it over the complete uBO here — unless you specifically want AdGuard’s paid system-wide apps alongside it. (Note: Raymond Hill warns against running uBO with any other content blocker — they conflict. Pick one.)

Which should Safari, iPhone, and iPad users pick?

Either works — this is the one platform where it’s genuinely a toss-up. The full uBlock Origin never supported iOS, so nobody here is losing anything. uBlock Origin Lite is available for Safari on Mac, iPhone, and iPad through the App Store as a Safari content blocker — free, from the original developer. AdGuard counters with AdGuard for Safari (free) and AdGuard for iOS, including AdGuard Pro with premium features enabled. For the simplest free Safari blocker, uBO Lite does the job; for a deeper Apple-native product with DNS-level options, AdGuard’s mobile apps go further.

What about Android — and blocking ads inside apps?

This is AdGuard’s clearest win. uBlock Origin on Android means one thing: Firefox for Android with the full uBO extension — excellent inside Firefox, nonexistent everywhere else on the phone. AdGuard for Android is a native app that filters device-wide, including ads inside other apps and games. If your complaint is “ads in my apps” rather than “ads in my browser,” AdGuard’s paid Android app is the only answer of the two. (Note: AdGuard can’t be published on Google Play — you download it from AdGuard’s own site, which the company documents in its install guide.)

How much does AdGuard actually cost?

AdGuard’s pricing is freemium, and the honest version is: the browser extension is free; you pay only for the system-wide apps. From AdGuard’s official license page:

• Personal: covers 3 devices — about $2.49/month billed annually ($29.88/year), or a $79.99 one-time lifetime license.
• Family: covers 9 devices — about $5.49/month billed annually ($65.88/year), or a $169.99 one-time lifetime license.
• Licenses are universal across Windows, macOS, Android, and iOS, and you can move a license between devices from your AdGuard account. Purchases carry a 30-day money-back guarantee.

Two pricing realities to know. First, AdGuard runs frequent promotions — the license page itself shows strike-through pricing — so treat any figure as “check today.” Second, the lifetime math: if you’ll use it for three or more years, the lifetime license beats renewing annually. uBlock Origin, meanwhile, costs $0 forever with no paid tier to compare against — the pricing question only exists on AdGuard’s side.

The final recommendation: which ad blocker should you install?

Forget “which is better” in the abstract. Match the tool to your setup:

• Firefox on desktop or Android: uBlock Origin (full version). The most powerful free blocker in existence, running at full strength. No contest.
• Chrome or Edge, browser-only needs, zero budget: uBlock Origin Lite. Free, from the original developer, good enough for everyday browsing.
• Chrome or Edge, and you want maximum blocking: AdGuard’s paid apps. System-wide filtering that ignores Manifest V3 limits entirely.
• Safari on Mac, iPhone, or iPad: uBlock Origin Lite for the simplest free option; AdGuard for iOS / AdGuard Pro for the deeper Apple-native product.
• Ads inside Android apps and games bother you: AdGuard for Android (paid). Nothing in the uBlock family reaches outside the browser.
• Power users who tinker: uBlock Origin on Firefox — dynamic filtering, the logger, and medium mode have no equal.
• Households and parental controls: AdGuard Family (9 devices) with parental controls — a category uBlock Origin doesn’t compete in.

The uncomfortable truth for longtime uBlock Origin fans on Chrome: the extension you loved is not coming back. Google’s Manifest V3 transition is complete — the Web Store listings were purged on August 31, 2026, and there is no technical path back. Both successors are honest products: uBlock Origin Lite keeps the original developer’s philosophy alive for free, and AdGuard offers a commercial route to blocking that Chrome’s rules can’t touch. Pick based on your browser and your budget.