Canvas data blocked / poor error message
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"?