[tor-bugs] #4810 [Firefox Patch Issues]: Weird screen sizes reported by Panopticlick

Tor Bug Tracker & Wiki blackhole at torproject.org
Sat Oct 3 08:35:25 UTC 2015


#4810: Weird screen sizes reported by Panopticlick
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     Reporter:  erikd                |      Owner:  mikeperry
         Type:  enhancement          |     Status:  needs_revision
     Priority:  major                |  Milestone:  TorBrowserBundle
    Component:  Firefox Patch        |  2.3.x-stable
  Issues                             |    Version:
   Resolution:                       |   Keywords:
Actual Points:                       |  Parent ID:
       Points:                       |    Sponsor:
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Comment (by elypter):

 random agent spoofer is not a good idea for window size spoofing because
 it can only fake resolution for javascript. window size detected via css
 cannot be faked so a well equipped website could gather more information
 with enabled RAS than without.

 Instead of snapping the window size to multiples of a fixed amount of
 pixels it should snap to common(common for firefox) window sizes reported
 by panopticlick. wether to use window resolutions from maximized windows
 depends on wether to use static or dynamic screen size if it is important
 that javascript cannot see the screensize change.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4810#comment:15>
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