<sub><ahref="https://github.com/gorhill/uBlock/wiki/uBlock-Origin-is-completely-unrelated-to-the-web-site-ublock.org"><b>BEWARE!</b> uBO is (and has always been) COMPLETELY UNRELATED to the website <code>ublock.org</code></a>.</sub>
<ahref="https://addons.mozilla.org/addon/ublock-origin/"><imgsrc="https://user-images.githubusercontent.com/585534/107280546-7b9b2a00-6a26-11eb-8f9f-f95932f4bfec.png"alt="Get uBlock Origin for Firefox"></a>
<ahref="https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm"><imgsrc="https://user-images.githubusercontent.com/585534/107280622-91a8ea80-6a26-11eb-8d07-77c548b28665.png"alt="Get uBlock Origin for Chromium"></a>
<ahref="https://microsoftedge.microsoft.com/addons/detail/ublock-origin/odfafepnkmbhccpbejgmiehpchacaeak"><imgsrc="https://user-images.githubusercontent.com/585534/107280673-a5ece780-6a26-11eb-9cc7-9fa9f9f81180.png"alt="Get uBlock Origin for Microsoft Edge"></a>
<ahref="https://addons.opera.com/extensions/details/ublock/"><imgsrc="https://user-images.githubusercontent.com/585534/107280692-ac7b5f00-6a26-11eb-85c7-088926504452.png"alt="Get uBlock Origin for Opera"></a>
uBO is **NOT** an "ad blocker"; it is a [wide-spectrum content blocker][Blocking] for Chromium and Firefox with CPU and memory efficiency as primary features. When newly installed, the default behavior of uBO is to block ads, trackers, and malware sites through [EasyList][EasyList], [EasyPrivacy][EasyPrivacy], [Peter Lowe's Blocklist][Peter Lowe's Blocklist], [Online Malicious URL Blocklist][Malicious Blocklist], and uBO's [filter lists][uBO Filters].
[Popup user interface] | [A point-and-click firewall that is configurable on a per-site basis][Dynamic Filters]
<ahref="https://github.com/gorhill/uBlock/wiki/Quick-guide:-popup-user-interface"><imgsrc="https://user-images.githubusercontent.com/585534/84045360-b10ee580-a976-11ea-9e91-29c2107b47c2.png"/></a><br><sup>.<br>.</sup> | <ahref="https://github.com/gorhill/uBlock/wiki/Dynamic-filtering:-quick-guide"><imgsrc="https://user-images.githubusercontent.com/585534/84045366-b1a77c00-a976-11ea-9121-e8c8f35c66c8.png"/></a><br><sup>Configure as you wish.<br>The image shows 3rd-party scripts and frames blocked by default everywhere.</sup>
uBO is **NOT** an "ad blocker"; it is a wide-spectrum content blocker. uBO blocks ads through the EasyList filter syntax and [extends][Extended Syntax] the syntax to work with custom rules and filters. Furthermore, the advanced mode allows uBO to work in [default-deny mode][Default Deny], which will cause [all 3rd-party network requests][3rd Party Requests] to be blocked by default unless allowed by the user.
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, involved means (such as [uMatrix]).
EasyList, EasyPrivacy, Peter Lowe's Blocklist, Online Malicious URL Blocklist, and uBO's filter lists are enabled by default when you install uBO. Many other lists are available to block trackers, analytics, and more. Hosts files are also supported.
Once you install uBO, 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.
There is no guarantee that the package will be available on your specific platform, in which case, you will have to install it from [Firefox Add-ons][Mozilla].
Do **NOT** use any other content blocker concurrently with uBO to benefit from uBO's higher efficiency. uBO will [perform][Performance] as well as or better than most of the other popular ad blockers. Other blockers can prevent uBO's privacy or anti-blocker-defusing features from working correctly.
Without the preset filter lists, this extension is nothing. If you ever want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.
