Issues uploading with Tor Browser

In short, Tor Browser has a privacy feature that shields your browser from HTML5 Canvas Image Extraction, a technique used for browser fingerprinting.

Currently, the only way to bypass this is by slightly reducing your privacy protection. You have two options:

1. Globally disabling the feature in about:config

  • To access browser settings, put about:config into the address bar.
  • Find following setting and turn it off:
    privacy.resistFingerprinting.randomDataOnCanvasExtract

2. Allowing a canvas exception for specific domains

There’s now also the choice to allow a canvas exception for specific sites. It seems like this exception lasts only for the current session. To try it out:

  • Look for a ‘canvas’ icon in the top-left corner of the URL bar.
  • Click the icon, then select ‘Allow’.

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