uBlock Origin
uBlock Origin is a free, open-source content blocker for Firefox and Chromium-based browsers, including Edge and Opera.
What uBlock Origin is
uBlock Origin is a free, open-source content blocker for Firefox and Chromium-based browsers, including Edge and Opera. It blocks ads, trackers, coin miners, popups, anti-blockers, and malware sites by default. Several filter lists are built in, and users can add other lists or hosts files. Custom rules use EasyList syntax, with extra options for filters; users can also turn off preselected lists if the blocking is too broad. Its basic and advanced popup interfaces include a per-site point-and-click firewall. The project’s stated privacy goal is to help neutralize methods that invade privacy in the browser. It is described as CPU- and memory-efficient, fast, and lean. Desktop and Android versions of Firefox are supported, along with Chromium and Thunderbird versions. In Thunderbird, it affects feeds but not email. The software is GPLv3-licensed, and enterprise deployment documentation is available.
Good
- Blocks ads, trackers, popups, and malware sites by default
- Supports additional filter lists and hosts files
- Includes a per-site point-and-click firewall
- Available for desktop and Android Firefox
Watch out
- The project advises against pairing it with another content blocker
- Thunderbird blocking affects feeds, not email
- Best performance is stated for Firefox
Who it suits
It suits people who want browser content blocking with adjustable filter lists and custom rules. Thunderbird users should note that it applies to feeds, not email.
Verdict
uBlock Origin combines default blocking with options to tailor filter lists and site rules. Its browser scope and Thunderbird feed-only behavior are worth considering before installing.
Plans and prices
From uBlock Origin's own pricing page, checked 27 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free open-source software; no donations sought. |
The facts
Each one read from uBlock Origin's own pages, with the date it was checked.
Money
- Billing terms
- No billing schedule or paid subscription terms are stated.checked 27 Sep 2026
- Free plan
- Yeschecked 21 Sep 2026
- Free tier limits
- The page does not state a numeric free-tier limit.checked 27 Sep 2026
- Trial and refund
- No trial or refund policy is stated.checked 27 Sep 2026
What it does
- Blocker compatibility
- The page advises against using uBO with another content blocker.checked 27 Sep 2026
- Content blocking
- Blocks ads, trackers, coin miners, popups, anti-blockers, and malware sites by default.checked 27 Sep 2026
- Cookie popup blocking
- Yeschecked 21 Sep 2026
- Custom filter lists
- Yeschecked 21 Sep 2026
- Custom filters
- Uses EasyList syntax and extends it for custom rules and filters.checked 27 Sep 2026
- Element picker
- Yeschecked 21 Sep 2026
- Enterprise deployment
- Enterprise deployment documentation is provided.checked 27 Sep 2026
- Filter lists
- Uses several built-in lists and supports many other lists and hosts files.checked 27 Sep 2026
- Filter selection
- Users can unselect preselected filter lists if uBO blocks too much.checked 27 Sep 2026
- Performance profile
- Described as CPU- and memory-efficient, fast, and lean.checked 27 Sep 2026
- Pricing model
- Free and open-source; no paid pricing is stated.checked 27 Sep 2026
- Privacy goal
- Its primary goal is helping users neutralize privacy-invading methods entering the browser.checked 27 Sep 2026
- Repository activity
- The repository lists 14,307 commits, 68.2k stars, and 4.4k forks.checked 27 Sep 2026
- Software license
- The repository is licensed under GPL-3.0/GPLv3.checked 27 Sep 2026
- Support channel
- Support, questions, and help are directed to the uBlockOrigin subreddit.checked 27 Sep 2026
- Thunderbird scope
- In Thunderbird, it affects feeds but not emails.checked 27 Sep 2026
Where it runs
- Browser support
- multiple-browserschecked 21 Sep 2026
- Device coverage
- desktop-and-mobilechecked 21 Sep 2026
- Platform coverage
- Available for desktop and Android versions of Firefox; Chromium and Thunderbird versions are also provided.checked 27 Sep 2026
- Supported browsers
- It works best on Firefox and supports Chromium-based browsers, including Edge and Opera.checked 27 Sep 2026
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