[tor-bugs] #31206 [Applications/Tor Browser]: http://ip-check.info detects browser window size with JS disabled

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#31206: http://ip-check.info detects browser window size with JS disabled
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 Reporter:  cypherpunks               |          Owner:  tbb-team
     Type:  defect                    |         Status:  closed
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Critical                  |     Resolution:  not a bug
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Changes (by Thorin):

 * status:  reopened => closed
 * resolution:   => not a bug


Comment:

 Go to
 https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#screen -
 this has a bigger range and doesn't actually download any images (instead
 it inserts text), as it's just a PoC: thus it's way faster

 Resize away with letterboxing on. Leaking sizes **as you transition** from
 one letterbox to the next is not entropy

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31206#comment:18>
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