uBlock Origin Lite
What uBlock Origin Lite 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’s built-in lists, EasyList, EasyPrivacy, and Peter Lowe’s ad and tracking server list; users can enable additional rulesets. It also offers custom filter lists, an element picker, and cookie-popup blocking. Filtering works declaratively, so the extension does not need a permanent process to block content. The project says the browser handles CSS and JavaScript injection, and that the extension uses no CPU or memory while blocking. It says it collects no data and makes no remote requests except to fetch filter lists users subscribe to. Users can allow filtering across all sites by default or choose reduced host permissions. The project cautions that Lite is not an automatic replacement for uBlock Origin and may be less effective against anti-content-blocker sites or at preventing site breakage. Packaged rules and scripts update with the extension; subscribed remote lists are fetched when enabled.
Who it suits
It suits people seeking a free browser extension to block ads and other content, with options for additional filters and reduced host permissions. Users who rely on uBlock Origin should note that Lite is not an automatic replacement.
What it does well
- Free and open source.
- Blocks ads, trackers, miners, and other content.
- Includes an element picker and cookie-popup blocking.
- Users can choose reduced host permissions.
What to know first
- May be less effective against anti-content-blocker websites.
- May be less effective at preventing site breakage.
- Not an automatic replacement for uBlock Origin.
Limits
The app is free. The project says it may be less effective against anti-content-blocker sites and at preventing site breakage; it also says Lite is too different from uBlock Origin to replace it automatically.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free app · content blocking extension | Free |
As github.com lists them, read 10 Oct 2026. The maker's own page has the final word.
Getting started
- Open the project website on GitHub.
- Choose the extension for a supported major browser.
- Install it to begin blocking content with the default ruleset.
- Open the options page to enable additional rulesets or adjust permissions.
- Subscribe to remote filter lists if you want them fetched when enabled.
Verdict
uBlock Origin Lite provides free content blocking with optional rulesets and filter controls. Its stated compatibility limits matter for users expecting the same behavior as uBlock Origin.
Questions
How much does uBlock Origin Lite cost?
Its listed Free plan costs nothing.
Is it open source?
Yes. The project repository identifies a GPL-3.0 license.
Which platforms does it support?
Its listed platforms are extension, iOS, and macOS, with desktop-and-mobile device coverage. Browser support is listed as major browsers.
Can I add my own filter lists?
Yes. Custom filter lists are supported. Remote lists that users subscribe to are fetched when enabled.
Does it collect data?
The project says it collects no data and has no analytics or telemetry hooks. It says remote requests are limited to fetching filter lists users explicitly subscribe to.
Who makes uBlock Origin Lite?
The project is hosted at the uBlock Origin GitHub repository.
Facts from uBlock Origin Lite's own pages
- Additional filters
- Users can enable additional rulesets in the options page, and the Firefox listing shows custom filters and filter lists as dashboard panes. · addons.mozilla.org, 10 Oct 2026
- Blocking
- It blocks ads, trackers, miners, and other content immediately upon installation. · chromewebstore.google.com, 10 Oct 2026
- Browser support
- major-browsers · github.com, 20 Sept 2026
- 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. · github.com, 10 Oct 2026
- Cookie popup blocking
- Yes · github.com, 20 Sept 2026
- Custom filter lists
- Yes · github.com, 20 Sept 2026
- 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. · github.com, 10 Oct 2026
- 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. · github.com, 10 Oct 2026
- Device coverage
- desktop-and-mobile · github.com, 20 Sept 2026
- 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. · github.com, 10 Oct 2026
- Element picker
- Yes · github.com, 20 Sept 2026
- Filter updates
- Packaged rulesets and scripts update with the extension, while explicitly subscribed remote filter lists are fetched when enabled. · github.com, 10 Oct 2026
- 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. · github.com, 10 Oct 2026
- Management
- Administrators can define uBOL settings through managed storage. · github.com, 10 Oct 2026
- Permissions
- The permissions documentation says the all-sites host permission lets uBOL filter everywhere by default and that users can choose reduced host permissions. · github.com, 10 Oct 2026
- 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. · github.com, 10 Oct 2026
- Purpose
- uBlock Origin Lite is an efficient content blocker based on the Manifest V3 API. · github.com, 10 Oct 2026
- 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. · github.com, 10 Oct 2026
Where uBlock Origin Lite stands on Freedom251
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