[tbb-bugs] #18283 [Tor Browser]: Usage of native GUI controls for web content rendering allows fingerprinting

[Tor Bug Tracker & Wiki]

#18283: Usage of native GUI controls for web content rendering allows
fingerprinting
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 Reporter:  cypherpunks         |          Owner:  tbb-team
     Type:  defect              |         Status:  new
 Priority:  Medium              |      Milestone:
Component:  Tor Browser         |        Version:
 Severity:  Normal              |     Resolution:
 Keywords:  tbb-fingerprinting  |  Actual Points:
Parent ID:                      |         Points:
  Sponsor:                      |
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Comment (by cypherpunks):

 Replying to [comment:3 cypherpunks]:
 > Could you provide a demo, please?
 I added an attachment to the ticket. You need to enable Javascript.

 Changing the Windows theme (e.g. between Aero/Basic/Classic or some 3rd
 party theme) or customizing the scrollbar size changes the height values.

 You need to restart the browser for theme changes to take effect. Firefox
 only reads the theme at startup.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18283#comment:4>
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