Dynamic filtering

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Dynamic filtering is available to advanced users. Dynamic filtering in current uBlock versions can act as a complete replacement of "RequestPolicy"-like add-ons.

Quick guide
Excellent video guide contributed by The Hated One: "How to use uBlock Origin advanced user mode tutorial" (YouTube video; slightly dated, but still relevant)
Rule syntax
Rule precedence
Blocking modes

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
- Support
- 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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