CanvasBlocker

Blocks or fakes the browser APIs most used for fingerprinting.

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About CanvasBlocker

CanvasBlocker alters the results returned by canvas, audio, WebGL, font and other JavaScript APIs, either blocking them or returning slightly faked values per domain and per session, so a fingerprint cannot be matched across sites. Protection levels and per-site rules are configurable.

Strengths

  • Faking rather than blocking keeps sites working while breaking the fingerprint
  • Very granular per-API and per-site configuration

Limitations

  • Firefox focused
  • Aggressive settings break image editors, games and captchas

Details

Pricing
FreeFree and open source under the MPL.
License
MPL-2.0
Developer
kkapsner
Platforms
Browser extension
How it runs
Browser extension
Best suited for
Blocks or fakes the browser APIs most used for fingerprinting
Categories
Browser tools
Last verified
Added
Provenance
Selected from the TechWalrus Resource Hub (Browser Extensions); facts checked against the developer's own pages, 3 sources on file.

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