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uBlock Origin Lite
What it is
uBlock Origin Lite is a free, open-source content-blocking extension based on the Manifest V3 API. It blocks ads, trackers, miners and other content after installation. 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, create custom filters and filter lists, pick page elements and block cookie pop-ups. Filtering is declarative, so the extension does not need a permanent process for blocking; the browser performs CSS and JavaScript injection. The project says the extension itself uses no CPU or memory while blocking. It also says uBOL collects no data, has no home server, analytics or telemetry hooks, and makes no remote requests except to fetch filter lists users explicitly subscribe to. Users can allow filtering everywhere by default or choose reduced host permissions. Packaged rules and scripts update with the extension, while subscribed remote lists update when enabled. The project cautions that Lite is not an automatic replacement for uBlock Origin and may be less effective on anti-content-blocker sites or at preventing site breakage.
For and against
For
- Blocks ads, trackers and miners
- Includes several default filter lists
- Supports custom filters and element picking
- No data collection stated
- Free and open source
Against
- Not an automatic uBlock Origin replacement
- May be less effective on anti-blocker sites
- May allow more site breakage
The verdict
uBlock Origin Lite provides broad blocking with custom-list controls and a privacy-focused operating model. Its stated compatibility limits matter for users who require the behavior of the full uBlock Origin extension.
Who it suits
uBlock Origin Lite suits users seeking free browser content blocking on major browsers across desktop and mobile. It also fits users who want custom lists and a declarative design.
Plans and prices
Free
Free app · content blocking extension
Read 10 Oct 2026 · apps.apple.com
On the record
- 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 · read 10 Oct 2026
- Blocking
- It blocks ads, trackers, miners, and other content immediately upon installation.chromewebstore.google.com · read 10 Oct 2026
- Browser support
- major-browsersgithub.com · read 20 Sep 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 · read 10 Oct 2026
- Cookie popup blocking
- Yesgithub.com · read 20 Sep 2026
- Custom filter lists
- Yesgithub.com · read 20 Sep 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 · read 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 · read 10 Oct 2026
- Device coverage
- desktop-and-mobilegithub.com · read 20 Sep 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 · read 10 Oct 2026
- Element picker
- Yesgithub.com · read 20 Sep 2026
- Filter updates
- Packaged rulesets and scripts update with the extension, while explicitly subscribed remote filter lists are fetched when enabled.github.com · read 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 · read 10 Oct 2026
- Management
- Administrators can define uBOL settings through managed storage.github.com · read 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 · read 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 · read 10 Oct 2026
- Purpose
- uBlock Origin Lite is an efficient content blocker based on the Manifest V3 API.github.com · read 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 · read 10 Oct 2026
