A CPU and memory-efficient wide-spectrum content blocker for Chromium and Firefox, blocking ads, trackers, and malware.
uBlock Origin is a free, open-source browser extension that efficiently blocks ads, trackers, malware, and other privacy-invading content on the web. It solves the problem of intrusive advertising, tracking, and malicious scripts while using minimal system resources. It works across multiple browsers including Firefox and Chromium-based browsers.
Internet users seeking enhanced privacy, reduced distractions, and improved browsing performance without the resource overhead of some commercial blockers. It caters to both casual users and advanced users who want fine-grained control over content filtering.
Developers and users choose uBlock Origin for its superior efficiency, comprehensive blocking capabilities, and strong privacy focus. Its open-source nature, lack of 'acceptable ads' compromises, and advanced per-site firewall offer a transparent and powerful alternative to other ad blockers.
uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.
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uBlock Origin is designed to use less CPU and memory than many popular blockers, as highlighted in its performance comparisons and the README's emphasis on being 'CPU and memory-efficient'.
Leverages multiple filter lists including EasyList, EasyPrivacy, and malware lists, and supports custom rules and hosts files, offering wide-spectrum blocking of ads, trackers, and more.
Provides both a simple popup for basic use and an advanced mode with a per-site firewall, catering to both casual and technical users, as described in the documentation.
Actively focuses on neutralizing privacy-invading methods beyond visible ads, with a clear stance against the idea that blocking is theft, as stated in the README.
For Thunderbird, updates are no longer available via the add-on store and require manual installation from GitHub, and future support on Chrome is uncertain with warnings about end of support on Chrome 139.
Development builds and some versions must be installed manually from GitHub releases, and for Chromium and Thunderbird, they usually won't auto-update, adding maintenance overhead for users.
The advanced mode with dynamic filtering and per-site firewall can be overwhelming for users who prefer a set-and-forget solution, despite the availability of a simple mode.
uBlock Origin is an open-source alternative to the following products: