Skip to content
SPECIFICTION
Get listed

uBlock Origin Lite

github.com

Free plan macOSiOSBrowser extension
Visit github.com
Spec score 8.2 #18 of 48 in Ad blockers

What it is

uBlock Origin Lite is a free, open-source content-blocking extension built on the Manifest V3 API. It blocks ads, trackers, miners, and other content after installation. Its default rules include uBlock Origin lists, EasyList, EasyPrivacy, and Peter Lowe’s ad and tracking server list. Users can add rulesets, custom filters, and filter lists, and use an element picker and cookie-popup blocking. Filtering is declarative, so no permanent process is required; the project says the browser performs CSS and JavaScript injection and the extension itself uses no CPU or memory while blocking. The project says it collects no data, has no analytics or telemetry hooks, and makes no remote requests except for filter lists users explicitly subscribe to. Users can allow all-site filtering or reduce host permissions. It warns Lite is not an automatic uBlock Origin replacement and may be less effective against anti-blocker sites or breakage.

Spec sheet

Purpose
uBlock Origin Lite is an efficient content blocker based on the Manifest V3 API.Read 10 Oct 2026 · github.com
Privacy
The project says uBOL collects no data, has no home server or analytics or telemetry hooks, and makes no remote requests except to fetch filter lists a user explicitly subscribes to.Read 10 Oct 2026 · github.com
Support
The project directs extension issues to GitHub Issues, support questions to GitHub Discussions, and filter or website issues to the chat icon while on the affected site.Read 10 Oct 2026 · github.com
Additional filters
Users can enable additional rulesets in the options page, and the Firefox listing shows custom filters and filter lists as dashboard panes.Read 10 Oct 2026 · addons.mozilla.org
Blocking
It blocks ads, trackers, miners, and other content immediately upon installation.Read 10 Oct 2026 · chromewebstore.google.com
Browser support
major-browsersRead 20 Sep 2026 · github.com
Compatibility limits
The project says uBOL is too different from uBlock Origin to be an automatic replacement and may be less effective against anti-content-blocker websites or in preventing site breakage.Read 10 Oct 2026 · github.com
Cookie popup blocking
YesRead 20 Sep 2026 · github.com
Custom filter lists
YesRead 20 Sep 2026 · github.com
Declarative operation
Filtering is declarative, so the extension does not need a permanent process to block content; its service worker is needed when users interact with the popup or options pages.Read 10 Oct 2026 · github.com
Default filter lists
Its default ruleset includes uBlock Origin's built-in filter lists, EasyList, EasyPrivacy, and Peter Lowe’s Ad and tracking server list.Read 10 Oct 2026 · github.com
Device coverage
desktop-and-mobileRead 20 Sep 2026 · github.com
Efficiency claim
The project says the browser performs CSS and JavaScript injection for content filtering, so uBOL itself does not consume CPU or memory while blocking content.Read 10 Oct 2026 · github.com
Element picker
YesRead 20 Sep 2026 · github.com
Filter updates
Packaged rulesets and scripts update with the extension, while explicitly subscribed remote filter lists are fetched when enabled.Read 10 Oct 2026 · github.com
License and funding
The project repository identifies a GPL-3.0 license, and its privacy policy says uBOL does not accept donations or other financing.Read 10 Oct 2026 · github.com
Management
Administrators can define uBOL settings through managed storage.Read 10 Oct 2026 · github.com
Permissions
The permissions documentation says the all-sites host permission lets uBOL filter everywhere by default and that users can choose reduced host permissions.Read 10 Oct 2026 · github.com

Plans and prices

Free Free Free app · content blocking extension Read 10 Oct 2026 · apps.apple.com

Every uBlock Origin Lite plan and price →

Strong points and limits

Strong points

  • Manifest V3 content blocking
  • Custom filters and element picker
  • Cookie-popup blocking
  • No data collection or telemetry
  • Major-browser support

Limits

  • Not an automatic uBlock Origin replacement
  • May be less effective against anti-blocker sites
  • Reduced effectiveness may cause site breakage

Who it suits

People wanting a free browser extension for blocking ads, trackers, miners, and related content. It suits users comfortable managing filter lists and permissions.

Verdict

uBlock Origin Lite offers declarative blocking with configurable lists and minimal stated data handling. Its compatibility caveat means users should not assume feature parity with uBlock Origin.

Where Specifiction places it

Alternatives to uBlock Origin LiteAll alternatives →