
CanvasBlocker di kkapsner
Alters some JS APIs to prevent fingerprinting.
Metadati estensione


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:
More information on fingerprinting can be found at:
The different block modes are:
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:
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.
Segnala questo componente aggiuntivo per abuso
Se ritieni che questo componente aggiuntivo violi le politiche Mozilla sui componenti aggiuntivi o presenti dei possibili rischi di sicurezza o privacy, utilizza il seguente modulo per segnalarlo.
Attenzione: non utilizzare questo modulo per segnalare bug o richiedere nuove funzionalità; la segnalazione verrà inoltrata direttamente a Mozilla e non all’autore del componente aggiuntivo.
Questo componente aggiuntivo necessita di:
- Leggere e modificare le impostazioni di privacy
- Accedere alle schede
- Accedere ai dati di tutti i siti web
- Link componente aggiuntivo
- Versione
- 1.5
- Dimensione
- 358,58 kB
- Ultimo aggiornamento
- 3 mesi fa (18 gen 2021)
- Licenza
- Mozilla Public License, version 2.0
- Informativa sulla privacy
- Consulta l’informativa sulla privacy per questo componente aggiuntivo
- Cronologia versioni
new features:
- added {empty}, {false} and {undefined} to webGL preference parameters (i.e. VENDOR, RENDERER, UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL)
- added {disabled} to UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL to disabled the WEBGL_debug_renderer_info extension
- improved performance for protected canvas part "input"
fixes:
- protection of DOM manipulations on unloaded windows may break websites
known issues:
- if a data URL is blocked the page action button does not appear
- added {empty}, {false} and {undefined} to webGL preference parameters (i.e. VENDOR, RENDERER, UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL)
- added {disabled} to UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL to disabled the WEBGL_debug_renderer_info extension
- improved performance for protected canvas part "input"
fixes:
- protection of DOM manipulations on unloaded windows may break websites
known issues:
- if a data URL is blocked the page action button does not appear
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