This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Why does Panopticlick report successful canvas hash in firefox 59

ron.wilson
ron.wilson
more options

I read recently that starting with FF 58 canvas hashing would be blocked. (https://www.helpnetsecurity.com/2017/10/30/firefox-browser-fingerprinting/) Today I updated to FF 59 and ran the browser fingerprinting tool from panopticlick.org which is part of the Electronic Frontier Foundation. (https://panopticlick.eff.org/). The results of the test show that canvas hashing was succesful and displays the hash. I tried to post a screen shot of the results but was unable to do so.

I read recently that starting with FF 58 canvas hashing would be blocked. (https://www.helpnetsecurity.com/2017/10/30/firefox-browser-fingerprinting/) Today I updated to FF 59 and ran the browser fingerprinting tool from panopticlick.org which is part of the Electronic Frontier Foundation. (https://panopticlick.eff.org/). The results of the test show that canvas hashing was succesful and displays the hash. I tried to post a screen shot of the results but was unable to do so.

All Replies (2)

Shadow110
Shadow110
more options

Sorry, no idea. Suggest If you have a bug, file a bug report. https://bugzilla.mozilla.org/ Bug Writing Guidelines : https://developer.mozilla.org/en-US/docs/Mozilla/QA/Bug_writing_guidelines

Please let us know if this solved your issue or if need further assistance.

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

That article was based on a development version of Firefox 58.

As far as I know, this feature remains under the umbrella of the privacy.resistFingerprinting preference and is not a separate preference available without invoking that mode (which does many things).

Recent thread: Block canvas fingerprinting.