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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

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.