Using the most recent version of the Tor Browser Bundle for 64-bit GNU/Linux (Version 2.2.39-3)
, the following notification popped up when accessing https://duckduckgo.com:
This website (duckduckgo.com) 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.
I don't know anything about this subject matter myself so could someone explain to me what information duckduckgo.com is trying to get and why this is useful?
Here's a picture of the message: