Opened 6 years ago

Closed 6 years ago

#13038 closed defect (fixed)

Canvas data blocked / poor error message

Reported by: anon12345 Owned by:
Priority: Medium Milestone:
Component: Applications/Tor Browser Version:
Severity: Keywords: tbb-usability
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


When accessing Github a dialog appears:

This website attempted to access image data on a canvas. Since canvas image data can be used to discover information about your computer, blank image data was returned this time.

A button is shown with a default action "Allow in the future" and other options are "Never for this site" and not now.


The default option should be the most security conscious, which is "Thanks, don't tell me again".

Also these wordings to not make sense. "Never for this site" is incorrect English, especially since no question was asked in the prompt. Does this mean "Never return blank image again", or "Never allow again"?

Child Tickets

Attachments (1)

Screen Shot 2014-09-02 at 9.32.42 AM.png (315.0 KB) - added by anon12345 6 years ago.

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Change History (2)

Changed 6 years ago by anon12345

comment:1 Changed 6 years ago by gk

Component: - Select a componentTor Browser
Keywords: tbb-usability added
Resolution: fixed
Status: newclosed

We believe this problem is fixed in version 3.6.5 and 4.0-alpha-2 which are getting released today. You can find builds already on and

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