kkapsner/CanvasBlocker
A Firefox extension to protect from being fingerprinted. observed · 2026-08-28
Health v2 · maintenance only
64/100
- Activity 68
- Release rhythm 38
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 393
- age_days: 4417
- days_rel: 201
- days_push: 194
- n_releases_24m: 2
Adoption not part of the score
1501 stars · 94 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A Firefox browser extension that protects users from browser fingerprinting by blocking or faking readouts of JavaScript APIs such as canvas, WebGL, audio, and navigator. It offers multiple block modes including faking values, whitelists, blacklists, and per-site permission prompts.
Use cases
- prevent websites from fingerprinting my browser
- block canvas fingerprinting in firefox
- fake webgl and audio fingerprint readouts
- protect against browser tracking without breaking all sites
- whitelist trusted sites while blocking fingerprinting elsewhere
When to choose
- you use Firefox and want fine-grained control over fingerprinting APIs
- you prefer faking readouts over fully blocking APIs to keep sites working
- you need per-site whitelist/blacklist behavior
When to avoid
- you use Chrome or another non-WebExtension-compatible browser
- you want a set-and-forget solution without configuration
- you already run another fingerprinting protection for the same APIs, which can cause conflicts
Facets
plugin · maturity active
privacy security privacy browser-extensions security browser browser-extension fingerprinting firefox anti-tracking webextension canvas
3 sources
- readme: https://github.com/kkapsner/CanvasBlocker · fetched 2026-08-28 · f7bed16a3eea
- homepage: https://canvasblocker.kkapsner.de · fetched 2026-08-29 · 78b22d5c0c8c
- site_page: https://canvasblocker.kkapsner.de/faq · fetched 2026-08-29 · 0aa2086ca4d7
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| kkapsner/CanvasBlocker | main | 64 |
For agents
markdown · JSON · MCP: product_card(name="kkapsner/CanvasBlocker")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem