Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.

uMatrix promo image
What is uMatrix?

uMatrix is a matrix-based firewall Chrome extension designed to put users in control of their browser's activities. It enables users to decide where their browser connects, what type of data is downloaded, and what is allowed to execute, offering unparalleled privacy control. Out of the box, uMatrix blocks all 3rd-party scripts, which can be adjusted according to user’s preferences. Its filtering engine uses precedence logic to evaluate what is blocked or allowed. Additionally, it provides basic protection against trackers and malware sites.

Stats date:
Rating: 4.70 (801)
Version: 1.4.4 (Last updated: 2021-07-20)
Creation date: 2019-11-02
Manifest version: 2
  • browsingData
  • cookies
  • privacy
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 1.46M
Email: Click to see
Risk impact: Very high risk impact
Risk likelihood: Very low risk likelihood

Other platforms

uMatrix (v1.4.4)
4.79 (706) 22,694
Not available on Edge
Analyze keywords

uMatrix: A point-and-click matrix-based firewall, with many privacy-enhancing tools.

For advanced users.


uMatrix put you in full control of where your browser is allowed to connect, what type of data it is allowed to download, and what it is allowed to execute. Nobody else decides for you: You choose. You are in full control of your privacy.

Out of the box, uMatrix works in relax block-all/allow-exceptionally mode, meaning web sites which require 3rd-party scripts are likely to be "broken". With two clicks, uMatrix can be set to work in allow-all/block-exceptionally mode, which generally will not break web sites. See for more details on this topic.

  • See ALL the remote connections, failed or attempted, depending on whether they were blocked or allowed (you decide).

  • A single-click to whitelist/blacklist one or multiple classes of requests according to the destination and type of data (a blocked request will NEVER leave your browser).

  • Efficient blacklisting: cookies won't leave your browser, JavaScript won't execute, plugins won't play, tracking pixels won't download, etc.

See more
User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Blocks malicious scripts
  • Fine-grained control over website elements
  • Great security features
  • Improves browser performance
  • Eliminates unwanted content on web pages
  • Highly configurable per-site and domain
  • Provides visibility into what is happening
  • Powerful and versatile
  • Top privacy and productivity addon
  • Can create web problems and block pages
  • Not user-friendly
  • Complex at first
  • Steep learning curve
  • Can be trigger happy and block trusted sites
  • May need to disable for certain websites to function correctly
  • May block websites or interfere with their functionality
  • Built-in blocking rules may not be sufficient
  • May block translation and leave blank spaces for advertisements
Most mentioned
  • Blocks malicious scripts
  • Fine-grained control over website elements
  • Great security features
  • Improves browser performance
  • Eliminates unwanted content on web pages
  • Complexity at first
  • Steep learning curve
View all user reviews
Risk impact

uMatrix is not very risky to use and it requires a lot of sensitive permissions. Avoid installing this extension unless you absolutely trust this publisher.

Risk likelihood

uMatrix has earned a good reputation and can be trusted.

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