Build status Support development
uBlock: an efficient blocker extension for your browser. Fast, potent, and lean.
* [Getting Started & Installation](#getting-started) * [Performance & Benchmarks](#performance) * [Tips](#tips) * [FAQ](https://chrismatic.io/ublock/faq/) * [About](#about-ublock) ## Getting started #### Installation: * **Chrome**: available on the [Chrome Web Store](https://chrome.google.com/webstore/detail/ublock/epcnnfbjfcgphgdmggkamkmgojdagdnn) or for [manual](https://github.com/chrisaljoudi/uBlock/tree/master/dist#install) installation. * **Safari**: available to install [from the homepage](https://chrismatic.io/ublock/safari/), or from the [Safari Extension Gallery](https://extensions.apple.com/details/?id=net.gorhill.uBlock-96G4BAKDQ9). * **Firefox**: available on the [Firefox Add-ons site](https://addons.mozilla.org/en-US/firefox/addon/ublock/), or for [manual](https://github.com/chrisaljoudi/uBlock/releases) installation. * Due to Mozilla's review process, the version of uBlock available from the Add-ons homepage is currently often outdated. This isn't in our control. * **Opera**: Opera shares Chrome's underlying engine, so you can install uBlock simply by grabbing the [latest release for Chrome](https://github.com/chrisaljoudi/uBlock/releases/latest). uBlock has tooltips throughout its UI to help you along. But just in case you need it, [here's a quick guide for basic usage](https://github.com/chrisaljoudi/uBlock/wiki/Quick-guide:-popup-user-interface). ## Performance #### Memory

On average, uBlock really does make your browser run leaner. [1]

Chrome


Safari


Firefox


[1] An overview of the benchmark is available at this wiki page.
#### CPU

uBlock is also CPU-efficient

Details of the benchmark available in this LibreOffice spreadsheet.

#### Blocking

Being lean and efficient doesn't mean blocking less

For details of benchmark, see uBlock and others: Blocking ads, trackers, malwares.

**Some quick tests:** These tests are by no means complete or comprehensive, but do remain helpful. - [Index](http://raymondhill.net/ublock/tests.html) - [Web page components](http://raymondhill.net/ublock/tiles1.html) - [Popups](http://raymondhill.net/ublock/popup.html) ## Tips * **To benefit from uBlock's higher efficiency,** it's advised that you don't use other inefficient blockers at the same time (such as AdBlock or Adblock Plus). uBlock will do [as well or better](#blocking) than most popular ad blockers. * It's important to note that blocking ads [is *not* theft](https://twitter.com/LeaVerou/status/518154828166725632). Don't fall for this creepy idea. The _ultimate_ logical consequence of `blocking = theft` is the criminalisation of the inalienable right to privacy. * _EasyList_, _Peter Lowe's Adservers_, _EasyPrivacy_ and _Malware domains_ are enabled by default when you install uBlock. Many more lists are readily available to block trackers, analytics, and more. Hosts files are also supported. * Once you install uBlock, you can easily un-select any of the pre-selected filter lists if you think uBlock blocks too much. For reference, Adblock Plus installs with only _EasyList_ enabled by default. * Feel free to read [about the extension's required permissions](https://github.com/chrisaljoudi/uBlock/wiki/About-the-required-permissions). ## About uBlock Some users might want to check out [uBlock Origin](https://github.com/gorhill/uBlock): a noteworthy personal fork of uBlock from @gorhill with a slightly different featureset. uBlock is a general-purpose blocker — not an *ad blocker* specifically. uBlock's main goal is to help users neutralize privacy-invading apparatus — ads being one example. uBlock blocks ads through its support of the [Adblock Plus filter syntax](https://adblockplus.org/en/filters). uBlock [extends](https://github.com/chrisaljoudi/uBlock/wiki/Filter-syntax-extensions) the syntax and is designed to work with custom rules and filters. Free and open-source. For users, by users. If uBlock is useful to you, [donations to support development are much appreciated](https://chrismatic.io/ublock/). [Feel free to read about uBlock's development philosophy](https://chrismatic.io/ublock/philosophy) and [uBlock's manifesto](MANIFESTO.md). *Acknowledgment:* uBlock comes with several filter lists ready to use out-of-the-box (including but not limited to: EasyList, Peter Lowe's, several malware filter lists). We deeply appreciate the people working hard to maintain those lists which are available to use by all for free. ## License [GPLv3](https://github.com/chrisaljoudi/uBlock/blob/master/LICENSE.txt).