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CanvasBlocker 預覽

CanvasBlocker 作者: kkapsner

Alters some JS APIs to prevent fingerprinting.

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4.6 (453 reviews)4.6 (453 reviews)
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This add-on allows users to prevent websites from using some Javascript APIs to fingerprint them. Users can choose to block the APIs entirely on some or all websites (which may break some websites) or fake its fingerprinting-friendly readout API.

If you encounter any problems please check the FAQ first. Please report issues and feature requests at https://github.com/kkapsner/CanvasBlocker/issues

IMPORTANT: you should only have ONE addon/setting set that protects an API. Otherwise you could face massive performance issues. (E.g. EclipsedMoon for Palemoon has 'canvas.poison' which is known to cause issues: https://github.com/kkapsner/CanvasBlocker/issues/253#issuecomment-459499290)
But setting privacy.resistFingerprinting to true and/or using the new fingerprinting protection introduced with Firefox 67 is fine.

Protected "fingerprinting" APIs:
  • canvas 2d
  • webGL
  • audio
  • history
  • window (disabled by default)
  • DOMRect
  • navigator (disabled by default)
  • screen

More information on fingerprinting can be found at:
  • <canvas>: http://www.browserleaks.com/canvas
  • audio:
    • https://audiofingerprint.openwpm.com/ (very poorly written = slow)
    • https://webtransparency.cs.princeton.edu/webcensus/#audio-fp
  • DOMRect:
    • http://jcarlosnorte.com/security/2016/03/06/advanced-tor-browser-fingerprinting.html
    • https://browserleaks.com/rects

The different block modes are:
  • fake: Canvas Blocker's default setting, and my favorite! All websites not on the white list or black list can use the protected APIs. But values obtained by the APIs are altered so that a consistent fingerprinting is not possible
  • ask for permission: If a website is not listed on the white list or black list, the user will be asked if the website should be allowed to use the protected APIs each time they are called.
  • block everything: Ignore all lists and block the protected APIs on all websites.
  • allow only white list: Only websites in the white list are allowed to use the protected APIs.
  • block only black list: Block the protected APIs only for websites on the black list.
  • allow everything: Ignore all lists and allow the protected APIs on all websites.
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權限與資料了解更多

必要權限:

  • 讀取或修改隱私設定
  • 存取瀏覽器分頁
  • 存取您所有網站中的資料
更多資訊
附加元件網址
  • 首頁
版本
1.11
大小
448.87 KB
最近更新
7 個月前 (2025年1月3日)
相關分類
  • 隱私權與安全性
授權條款
Mozilla Public License 2.0
隱私權保護政策
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1.11 版的發行公告
changes:

- added jnn-pa.googleapis.com to the convenience preset for YouTube
- improve whitelist inspection
- improve settings export

new features:

- added search for setting values and urls
- added search specific keywords
- new translations

fixes:

- proxy behaviour broke some websites

known issues:

- if a data URL is blocked the page action button does not appear
- canvas and navigator APIs in workers are not protected
kkapsner 製作的更多擴充套件
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