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Browser	Install from ...	Status
	Firefox Add-ons	uBO works best on Firefox
	Edge Add-ons
	Opera Add-ons
	Chrome Web Store	About Google Chrome's "This extension may soon no longer be supported" End of support on Chrome 139
	Thunderbird Add-ons	No longer updated and stuck at 1.49.2. Later versions require "GitHub - Releases".
	GitHub - Releases	Stable and development versions on Firefox, Chromium MV2, and Thunderbird. Must be placed manually into web browsers; the Chromium and Thunderbird versions usually won't auto-update.

uBlock Origin (uBO) is a CPU and memory-efficientwide-spectrum content blocker for Chromium and Firefox. It blocks ads, trackers, coin miners, popups, annoying anti-blockers, malware sites, etc., by default usingEasyList,EasyPrivacy,Peter Lowe's Blocklist,Online Malicious URL Blocklist, and uBOfilter lists. There are many other lists available to block even more. Hosts files are also supported. uBO uses the EasyList filter syntax andextends the syntax to work with custom rules and filters.

You may easily unselect any preselected filter lists if you think uBO blocks too much. For reference, Adblock Plus installs with only EasyList, ABP filters, and Acceptable Ads enabled by default.

It is important to note that using a blocker isNOTtheft. Do not fall for this creepy idea. Theultimate logical consequence ofblocking = theft is the criminalization of the inalienable right to privacy.

Ads, "unintrusive" or not, are just the visible portion of the privacy-invading means entering your browser when you visit most sites.uBO's primary goal is to help users neutralize these privacy-invading methods in a way that welcomes those users who do not wish to use more technical means.

• Documentation
• Installation
  • Firefox
  • Thunderbird
  • Chromium
  • All Programs
  • Enterprise Deployment
• Release History
• Translations
• About

Basic Mode	Advanced Mode
Thesimple popup user interface for an install-it-and-forget-it type of installation that is configured optimally by default.	Theadvanced popup user interface includes a point-and-click firewall that is configurable on a per-site basis.

Visit theWiki for documentation.

For support, questions, or help, visit/r/uBlockOrigin.

Required Permissions

Firefox Add-ons

Development Builds

uBOworks best on Firefox and is available for desktop and Android versions.

Thunderbird Add-ons

In Thunderbird, uBlock Origin does not affect emails, just feeds.

Chrome Web Store

Microsoft Edge Add-ons (Published byNicole Rolls until version 1.62. Ownership transfer at version 1.64.)

Opera Add-ons

Development Builds

uBO should be compatible with any Chromium-based browser.

DoNOT use uBO with any other content blocker. uBOperforms as well as or better than most popular blockers. Other blockers can prevent uBO's privacy or anti-blocker-defusing features from working correctly.

Manual Installation

Deploying uBO

Releases Page

Help translate uBO viaCrowdin.

Manifesto

Privacy Policy

GPLv3 License

Free. Open-source. For users by users. No donations sought.

If you ever want to contribute something, think about the people working hard to maintain the filter lists you are using, which are available to use by all for free.