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[tor-bugs] #16267 [Tor Browser]: NoCaptcha Recaptcha is not working because of canvas fingerprint blocking
#16267: NoCaptcha Recaptcha is not working because of canvas fingerprint blocking
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Reporter: szgal | Owner: tbb-team
Type: defect | Status: new
Priority: major | Milestone: TorBrowserBundle 2.3.x-stable
Component: Tor Browser | Version:
Keywords: | Actual Points:
Parent ID: | Points:
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Now, the browser is blocking canvas fingerprinting. But the new ReCaptcha
is not working without it. When I try to solve a NoCaptcha on any site
EXCEPT google.com, there is no dialog asking whether to allow reading the
canvas, it simply fails. I know what I need to select, but I cannot see
the pictures.
Repro steps:
1. Run newest TOR browser
1. Visit a page with recaptcha, like this:
http://www.codediesel.com/demos/google-recaptcha/
1. Try to solve
Interestingly, it works on Google's page:
http://www.google.com/recaptcha/api2/demo
Not-so-good workaround: Open network inspector, click checkbox, look for
something like "payload" in network inspector, view response. Now you can
see the images.
Workaround requiring modifications (I would like to have this option even
if this bug is fixed): Allow user to disable canvas read blocking.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16267>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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