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Specifically, avoid long list of hostnames for the `matches` property[1] when registering the content scripts, as this was causing whole browser freeze for long seconds in Chromium-based browsers (reason unknown). The content scripts themselves will sort out which cosmetic filters to apply on which websites. This change makes it now possible to support annoyances-related lists, and thus two lists have been added: - EasyList -- Annoyances - EasyList -- Cookies Related issue: - https://github.com/uBlockOrigin/uBOL-issues/issues/5 These annoyances-related lists contains many thousands of specific cosmetic filters and as a result, before the above change this was causing long seconds of whole browser freeze when simply modifying the blocking mode of a specific site via the slider in the popup panel. It is now virtually instantaneous, at the cost of injecting larger cosmetic filtering-related content scripts (which typically should be garbage-collected within single-digit milliseconds). Also, added support for entity-based cosmetic filters. (They were previously discarded). --- [1] https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/scripting/RegisteredContentScript |
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uBlock Origin (uBO)
BEWARE! uBO is (and has always been) COMPLETELY UNRELATED to the website ublock.org.
uBlock Origin (uBO) is a CPU and memory-efficient wide-spectrum content blocker for Chromium and Firefox. It blocks ads, trackers, coin miners, popups, annoying anti-blockers, malware sites, etc., by default using EasyList, EasyPrivacy, Peter Lowe's Blocklist, Online Malicious URL Blocklist, and uBO filter lists. There are many other lists available to block even more. Hosts files are also supported. uBO uses the EasyList filter syntax and extends the syntax to work with custom rules and filters.
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.
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 means.
Documentation
| Basic Mode | Advanced Mode |
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| The simple popup user interface for an install-it-and-forget-it type of installation that is configured optimally by default. | The advanced popup user interface includes a point-and-click firewall that is configurable on a per-site basis. |
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Visit the Wiki for documentation.
For support, questions, or help, visit /r/uBlockOrigin.
Installation
Firefox
uBO works best on Firefox and is available for desktop and Android versions.
Thunderbird
Chromium
Microsoft Edge Add-ons (Published by: Nicole Rolls)
uBO should be compatible with any Chromium-based browser.
All Programs
Do NOT use uBO with any other content blocker. uBO performs as well as or better than most popular blockers. Other blockers can prevent uBO's privacy or anti-blocker-defusing features from working correctly.
Enterprise Deployment
Release History
Translations
Help translate uBO via Crowdin.
About
Free. Open-source. For users by users. No donations sought.
If you ever want to contribute something, think about the people working hard to maintain the filter lists you are using, which are available to use by all for free.