Privacy policy

uBlock Origin (uBO) does not collect any data of any kind.

uBO has no home server.
uBO doesn't embed any analytic or telemetry hooks in its code.
uBO doesn't accept donations or any other form of financing.

The only time uBO connects to a remote server is to update the filter lists and other related assets. If you disable auto-update in the "Filter lists" pane in the dashboard, uBO will not connect to any remote server unless you click "Update now" and only if there are assets deemed "out of date."

GitHub is used to host the uBO project. GitHub, Inc. (a subsidiary of Microsoft Corporation) owns GitHub and is unrelated to uBO.

uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.

Wiki home
About the Wiki documentation
Permissions
- Can you trust uBlock Origin?
Privacy policy
- Why don't you accept donations?
Info:
- Source (for developers)
- uBlock Origin Core (Node.js)
- About Safari, Canary, Tor and Kiwi support
- About Google Chrome's "This extension may soon no longer be supported"
The toolbar icon
The popup user interface
- The per-site switches
The context menu
Dashboard
- Settings pane
  - Cloud storage
  - Advanced user features
    - Advanced settings
- Filter lists pane
- My filters pane
  - Static filter syntax
    - Procedural cosmetic filters
    - Resources Library
- My rules pane
  - Dynamic filtering
  - Dynamic URL filtering
- Trusted sites pane
  - How to mark a web site as trusted
- Keyboard shortcuts
The logger
- DOM inspector
Element picker
Element zapper
Blocking mode
- Very easy mode
- Easy mode (default)
  - Easy mode + more privacy
  - Easy mode + enhanced security/privacy
- Medium mode (optimal for advanced users)
- Hard mode
- Nightmare mode
Strict blocking
- Badware risks
Few words about re-design of uBO's user interface
Reference answers to various topics seen in the wild
Overview of uBlock's network filtering engine
- Overview of uBlock's network filtering engine: details
- Does uBlock Origin block ads or just hide them?
- Doesn't uBlock Origin add overhead to page load?
- About "Why uBlock Origin works so much better than Pi‑hole does?"
uBlock's blocking and protection effectiveness:
- uBlock and others: Blocking ads, trackers, malwares
- About "This other extension reports more stuff blocked!"
- About "uBlock is inferior in capabilities as a result of being lighter on the browser"
- Does uBlock protect against fingerprinting?
- Does uBlock have parental control or password protection?
uBlock's resource usage and efficiency:
- Memory footprint: what happens inside uBlock after installation
- uBlock vs. ABP: efficiency compared
- Counterpoint: Who cares about efficiency, I have 8 GB RAM and|or a quad core CPU
- Debunking "uBlock Origin is less efficient than Adguard" claims
- Myth: uBlock consumes over 80MB
- Myth: uBlock is just slightly less resource intensive than Adblock Plus
- Myth: uBlock consumes several or several dozen GB of RAM
- Various videos showing side by side comparison of the load speed of complex sites
- Own memory usage: benchmarks over time
- Contributed memory usage: benchmarks over time
- Can uBO crash a browser?
Tools, tests
Deploying uBlock Origin
Proposal for integration/unit testing
uBlock Origin Core (Node.js):
- Split out uBO core functionality into separate module
Troubleshooting:
- Privileged Pages
- Software known to have uninstalled uBlock Origin
- The removed element reappears when you reload the page
- Read carefully if using uBO/webext on legacy Firefox
Good external guides:
- How to use uBlock Origin advanced user mode tutorial ↗︎
- Firefox: uBlock Origin – Firefox-Kompendium Teil2 ↗︎
- Beginners Cheat Sheet - "Syntax Meanings That Are Actually Human Readable" ↗︎
Scientific papers

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