uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.
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Raymond Hill 01e36db23a
Remove "permission-less" status at install time
Related issue:
https://github.com/uBlockOrigin/uBOL-home/issues/326

uBOL now asks broad host permissions by default. Users can still
choose narrow host permissions by using their browser's controls
for this.

For instance in Chromium, those host permissions controls are found
in the "Site access" section in the detailed view of an extension.

One can set "Site access" to "On click" to revoke broad host
permissions, and grant host permissions to only specific site.

In such mode, uBOL will still block through the DNR API, but no
cosmetic or scriptlet filtering will occurs, as these requires
permission to "read and change data" on websites for which higher
filtering mode is desired.

Some browsers do not automatically grant broad host permissions
even when an extension asks for broad permissions at install time,
and going forward all browsers will likely adopt this approach, and
thus it no longer made sense for uBOL to default to no broad hosts
permissions at install time, especially given this leads to issues
with no solution -- issues solved with the new approach (e.g. like
the ability to deploy uBOL in Optimal mode by default).
2025-04-09 15:11:17 -04:00
.github Fix workflow and makefile 2025-01-10 11:08:54 -05:00
assets Merge in long overdue change re. UKR list in assets.json 2025-03-31 11:26:41 -04:00
dist Make Firefox dev build auto-update 2025-04-08 15:51:30 -04:00
docs Fix typos in README, docs, and JS comments 2022-03-13 08:56:26 -04:00
platform Remove "permission-less" status at install time 2025-04-09 15:11:17 -04:00
src Code review for recent commit re path support in target 2025-04-08 19:01:43 -04:00
tools Add path support as target option in static extended filtering 2025-04-08 11:20:27 -04:00
.gitignore Update .gitignore 2025-01-04 20:41:28 -05:00
CHANGELOG.md Update changelog 2025-04-08 11:57:20 -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 Rebuild MV3 extension if mv3-data content changes 2025-03-10 09:24:26 -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 Fix "make lint" command; fix more lint errors 2025-01-19 09:35:51 -05:00
README.md Update links in readme 2024-11-01 16:33:23 -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)

BEWARE! uBO is (and has always been) COMPLETELY UNRELATED to the website ublock.org.


Get uBlock Origin for Firefox Get uBlock Origin for Microsoft Edge Get uBlock Origin for Opera Get uBlock Origin for Thunderbird


Get uBlock Origin for Chromium
IMPORTANT: About Google Chrome's "This extension may soon no longer be supported"


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)

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.