Re: [tor-bugs] #25451 [- Select a component]: Tor window size leaks information

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#25451: Tor window size leaks information
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 Reporter:  cypherpunks           |          Owner:  (none)
     Type:  defect                |         Status:  new
 Priority:  Medium                |      Milestone:
Component:  - Select a component  |        Version:
 Severity:  Normal                |     Resolution:
 Keywords:                        |  Actual Points:
Parent ID:                        |         Points:
 Reviewer:                        |        Sponsor:
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Comment (by cypherpunks):

 > Have some kind of prompt for the user to choose between common browser
 content window sizes

 That would allow easier fingerprinting. It's not just about your results
 on panopticlick, if there's only one Tor user who regularly visits some
 evil site foo.com and his browser size is always unique and differs from
 the TB standard, then he's easily fingerprintable.

 > Default to the largest common browser window size, and on resize snap
 the window size to other common browser content window resolutions

 Not everyone has 4K monitors, most folks are still on on 1366x768 and
 1920x1080 https://hardware.metrics.mozilla.com/

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25451#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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