pronounced you-block origin (/ˈjuːˌblɒk/) — you decide what enters your browser.
BEWARE! uBlock Origin is (and has always been) COMPLETELY UNRELATED to the web site ublock.org.
Do not use uBlock Origin along with other similarly-purposed blockers.
See below for more installation options.
An efficient blocker add-on for various browsers. Fast, potent, and lean.
uBlock Origin is NOT an "ad blocker": it is a wide-spectrum blocker -- which happens to be able to function as a mere "ad blocker". The default behavior of uBlock Origin when newly installed is to block ads, trackers and malware sites -- through EasyList, EasyPrivacy, Peter Lowe’s ad/tracking/malware servers, Online Malicious URL Blocklist, and uBlock Origin's own filter lists.
| Basic mode | Advanced-user mode |
|---|---|
| Popup user interface | A point-and-click firewall which can be configured on a per-site basis |
 . . |
 Configure as you wish: picture shows 3rd-party scripts and frames blocked by default everywhere |
Visit the uBlock Origin's wiki for documentation.
For support/questions/help, there is /r/uBlockOrigin on Reddit.
uBlock Origin (or uBlock₀) is not an ad blocker; it's a general-purpose blocker. uBlock Origin blocks ads through its support of the Adblock Plus filter syntax. uBlock Origin extends the syntax and is designed to work with custom rules and filters. Furthermore, advanced mode allows uBlock Origin to work in default-deny mode, which mode will cause all 3rd-party network requests to be blocked by default, unless allowed by the user.
That said, it's important to note that using a blocker is NOT theft. Don't fall for this creepy idea. The ultimate logical consequence of blocking = theft is the criminalisation of the inalienable right to privacy.
Ads, "unintrusive" or not, are just the visible portions of privacy-invading apparatus entering your browser when you visit most sites nowadays. uBlock Origin's main goal is to help users neutralize such privacy-invading apparatus — in a way that welcomes those users who don't wish to use more technical, involved means (such as uMatrix).
EasyList, EasyPrivacy, Peter Lowe's, Online Malicious URL Blocklist and uBO's own lists are enabled by default when you install uBlock Origin. Many more lists are readily available to block trackers, analytics, and more. Hosts files are also supported.
Once you install uBlock Origin, you may easily un-select any of the pre-selected filter lists if you think uBlock Origin blocks too much. For reference, Adblock Plus installs with only EasyList, ABP filters and Acceptable Ads enabled by default.
Feel free to read about the extension's required permissions.
You can install the latest version manually, from the Chrome Web Store, or from the Opera add-ons.
There is also a development version in the Chrome Web Store if you want to test uBlock Origin with the latest changes: see <