uBlock Origin vs uBlock Origin Lite

uBlock Origin is a free, open-source content blocker for desktop and Android versions of Firefox, as well as Chromium and Thunderbird versions. It blocks ads, trackers, coin miners, popups, anti-blockers, and malware sites by default. Several filter lists are built in, and users can add lists and hosts files or create custom rules using EasyList syntax with uBlock Origin extensions. If blocking is too broad, users can disable preselected lists. The basic and advanced popup interfaces include a per-site point-and-click firewall. The project’s stated purpose is to help users neutralize privacy-invading methods in the browser, and it is described as CPU- and memory-efficient, fast, and lean. It works best on Firefox and also supports Chromium-based browsers, including Edge and Opera. In Thunderbird, it affects feeds but not email. The project advises against running it alongside another content blocker. It is licensed under GPL-3.0/GPLv3, and enterprise deployment documentation is available.

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.