uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.
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Raymond Hill b50341089d
[mv3] Expand "Develop" pane
Move "No filtering" section in "Settings" to "Develop" pane. It is
now possible to view/edit the list of hostnames for any of the
filtering mode. This takes care of these issues:
- https://github.com/uBlockOrigin/uBOL-home/issues/270
- https://github.com/uBlockOrigin/uBOL-home/issues/297

Add ability to see all rulesets (read-only), to assist in investigating
filtering issues.
2025-06-13 12:46:05 -04:00
.github Fix workflow and makefile 2025-01-10 11:08:54 -05:00
assets Added 4 language codes for Firefox. (#3939) 2025-06-03 15:40:06 -04:00
dist Make Firefox dev build auto-update 2025-06-01 14:46:02 -04:00
docs Fix typos in README, docs, and JS comments 2022-03-13 08:56:26 -04:00
platform [mv3] Expand "Develop" pane 2025-06-13 12:46:05 -04:00
src [mv3] Expand "Develop" pane 2025-06-13 12:46:05 -04:00
tools [mv3] Update build script 2025-06-10 15:24:53 -04:00
.gitignore Update .gitignore 2025-01-04 20:41:28 -05:00
.gitmodules [mv3] Add codemirror-ubol as submodule 2025-05-21 08:01:21 -04:00
CHANGELOG.md Update changelog 2025-06-01 13:50:00 -04:00
CONTRIBUTING.md Update contributing guide 2024-11-01 16:33:22 -04:00
eslint.config.mjs Better integrate latest eslint version 2025-01-10 10:25:15 -05:00
LICENSE.txt first commit 2014-06-23 18:42:43 -04:00
Makefile [mv3] Add support for custom DNR rules 2025-05-29 09:06:02 -04:00
MANIFESTO.md Update MANIFESTO.md (#3888) 2023-04-15 15:42:12 -04:00
package-lock.json Better integrate latest eslint version 2025-01-10 10:25:15 -05:00
package.json Ignore lib directory when linting 2025-05-16 08:52:36 -04:00
README.md Edge status update (#3940) 2025-06-07 06:39:46 -04:00
RELEASE.HEAD.md Re-wording 2025-03-02 12:27:45 -05:00
REMOVED.md Added data about old popup panel 2022-11-08 16:53:04 -05:00

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uBlock Origin (uBO)

Browser Install from ... Status
Get uBlock Origin for Firefox Firefox Add-ons uBO works best on Firefox
Get uBlock Origin for Microsoft Edge Edge Add-ons
Get uBlock Origin for Opera Opera Add-ons
Get uBlock Origin for Chromium Chrome Web Store About Google Chrome's "This extension may soon no longer be supported"
End of support on Chrome 139
Get uBlock Origin for Thunderbird Thunderbird Add-ons No longer updated and stuck at 1.49.2

uBlock Origin (uBO) is a CPU and memory-efficient wide-spectrum content blocker for Chromium and Firefox. It blocks ads, trackers, coin miners, popups, annoying anti-blockers, malware sites, etc., by default using EasyList, EasyPrivacy, Peter Lowe's Blocklist, Online Malicious URL Blocklist, and uBO filter lists. There are many other lists available to block even more. Hosts files are also supported. uBO uses the EasyList filter syntax and extends 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 is NOT theft. Do not fall for this creepy idea. The ultimate logical consequence of blocking = 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

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

Visit the Wiki for documentation.

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

Installation

Required Permissions

Firefox

Firefox Add-ons

Development Builds

uBO works best on Firefox and is available for desktop and Android versions.

Thunderbird

Thunderbird Add-ons

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

Chromium

Chrome Web Store

Microsoft Edge Add-ons (Published by Nicole 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.

All Programs

Do NOT use uBO with any other content blocker. uBO performs 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

Enterprise Deployment

Deploying uBO

Release History

Releases Page

Translations

Help translate uBO via Crowdin.

About

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.