Github · GitHub Repository Radar
gorhill uBlock
uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.
Stars
67,540
Forks
4,324
Watchers: 67,540
Language
License: GNU General Public License v3.0
Repository Radar Score
65 / 100
Growth
- 7d
- +0
- 30d
- +0
- %
- 0.0%
Not enough metric snapshots yet to chart growth for this repository.
Score breakdown
- popularity 88
- growth 0
- activity 100
- freshness 100
- community 87
Need help integrating this stack?
Our team builds with modern open-source stacks. Tell us what you are shipping.
Get a quote →Badge Commits
Badge Issues
Badge Localization
Badge License
Badge NPM
Badge Mozilla
Badge Chrome
Badge Edge
| Browser | Install from ... | Status |
|---|---|---|
 |
Firefox Add-ons | uBO works best on Firefox |
 |
Edge Add-ons | "Moving the Microsoft Edge extensions ecosystem forward with Manifest Version 3": "Beginning in August 2026, Microsoft Edge will start the consumer transition away from Manifest Version 2 (MV2) extensions and toward MV3. Our goal is to complete the consumer transition by the end of 2026, with enterprise deprecation following in early 2027." |
 |
Opera Add-ons | |
 |
Removed | "Manifest V2 support timeline": "Aug 31st 2026: All remaining Manifest V2 extensions removed from the Chrome Web Store" About Google Chrome's "This extension may soon no longer be supported" |
 |
Thunderbird Add-ons | No longer updated and stuck at 1.49.2.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. |
Related:
uBlock Origin Lite
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.
| 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.
uBO works best on Firefox and is available for desktop and Android versions.
Chrome Web Store: Removed on 2026-08-31
Microsoft Edge Add-ons (Published by Nicole Rolls until version 1.62. Ownership transfer at version 1.64.)
uBO should be compatible with any Chromium-based browser.
In Thunderbird, uBlock Origin does not affect emails, just feeds.
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.
Help translate uBO via Crowdin.
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.
Repository Radar analysis
Deterministic insights derived from public metadata and our observations — not personal testing or reviews.
Why this repository is interesting
- High absolute popularity (67,540 stars) signals broad adoption.
- Maintained recently (last push 2 weeks ago).
Who should use it
- Developers working primarily with JavaScript
Potential use cases
- Reference or evaluate JavaScript open-source approaches in this domain
Strengths
- Recent repository activity
- README present in our index
- Declared license: GNU General Public License v3.0
- Substantial fork count (4,324) suggests reuse and contribution interest
Limitations / considerations
- Insights are derived from public metadata and our observations — not a substitute for code review
What to watch
- Re-check last push, issues, and releases on GitHub before production adoption
Strong signals: Strong community interest · Active maintenance
Source: GitHub (public metadata) + Repository Radar analysis. We do not claim ownership of third-party repositories.