uBlock Origin Lite

Manifest V3 version of uBlock Origin that filters content declaratively, using no background CPU.

Visit uBlock Origin Lite See 5 alternatives

Verified facts: 3 of 3
Alternatives ranked: 5
Approved reviews: 0
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About uBlock Origin Lite

uBlock Origin Lite (uBOL) is the uBlock Origin team's content blocker rebuilt for Manifest V3, the extension platform Chrome and Edge now require. Instead of running a filtering engine in the background, it hands its rules to the browser, which applies them itself; that means the extension uses essentially no CPU or memory while you browse. Its default ruleset includes uBlock Origin's own filters plus EasyList and EasyPrivacy, and you choose a filtering mode per site, from basic to complete. The trade-off is flexibility: MV3 limits the number and kind of rules, so there is no element picker-style custom filtering at the level of the full version, and some cosmetic and scriptlet filtering is less thorough. It is free and open source, available for Chrome, Edge, Firefox and Safari. For most people on Chromium browsers it is now the default recommendation.

Best for: Chrome, Edge and Safari users who want uBlock Origin's filtering after Manifest V3.

What works

Works on Chrome and Edge under Manifest V3
No background process, so near-zero resource use
Same team and core filter lists as uBlock Origin

Why people leave

Less flexible than full uBlock Origin
MV3 rule limits weaken some cosmetic filtering
Fewer advanced controls for power users

Top uBlock Origin Lite alternatives

See all 5

1
uBlock Origin
The full version with advanced filtering, still available on Firefox.
66.5
2
AdGuard
System-wide app filtering that avoids browser extension limits entirely.
62.6
3
Ghostery
Open-source MV3 blocker with automatic cookie-banner rejection.
59.6
4
Adblock Plus
Widely supported extension, though it shows acceptable ads by default.
57.2
5
NextDNS
DNS-level blocking that works in every browser and app.
55.3

Why people left uBlock Origin Lite

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uBlock Origin Lite: common questions

Is uBlock Origin Lite free?

Yes. uBlock Origin Lite is free, open-source software.

Is uBlock Origin Lite open source?

Yes. The source code is on GitHub at uBlockOrigin/uBOL-home.

What platforms does uBlock Origin Lite run on?

uBlock Origin Lite is available for Browser extension, iOS and macOS.

What are the best alternatives to uBlock Origin Lite?

The highest-ranked uBlock Origin Lite alternatives right now are uBlock Origin, AdGuard and Ghostery. See the full ranked list for pricing, platforms and verified facts.

See all 5 uBlock Origin Lite alternatives

uBlock Origin Lite facts

3 of 3 verified

Extension platform: Manifest V3; Checked Oct 25, 2026github.com(opens source in a new tab); “efficient content blocker based on the MV3 API .”
Background resource use: None while filtering; Checked Oct 25, 2026github.com(opens source in a new tab); “The browser handles CSS/JS injection for content filtering, ensuring that uBOL does not consume CPU or memory resources while blocking content.”
Browsers: Chrome, Firefox, Edge, Safari; Checked Oct 25, 2026github.com(opens source in a new tab); “Chrome Web Store Firefox Add-ons Edge Add-ons Safari App Store”