Re: [tor-bugs] #17023 [Tor Browser]: Investigate fingerprinting of mouse/pointing events

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

#17023: Investigate fingerprinting of mouse/pointing events
---------------------------------+--------------------------------
     Reporter:  arthuredelstein  |      Owner:  tbb-team
         Type:  defect           |     Status:  new
     Priority:  normal           |  Milestone:
    Component:  Tor Browser      |    Version:
   Resolution:                   |   Keywords:  tbb-fingerprinting
Actual Points:                   |  Parent ID:
       Points:                   |
---------------------------------+--------------------------------

Comment (by arthuredelstein):

 Things that worry me:
 * `MouseEvent.mozInputSource` is designed to report the type of pointing
 device being used. Maybe we should always spoof this to
 `MouseEvent.MOZ_SOURCE_MOUSE`?
 * `MouseEvent.buttons` reports if the user is using a mouse with unusual
 buttons ("Browser Forward", "Browser Back"). Suppress all but left, right,
 middle buttons?
 * `MouseEvent.movementX/Y`: Are these movements quantized in a hardware-
 dependent manner?
 * `MouseEvent.mozPressure`: Do we want to reveal that the user is using a
 touch-sensitive pointing device?
 * WheelEvent.deltaX/deltaY/deltaZ: Are these quantized in a hardware-
 dependent way?
 * WheelEvent.deltaWheel: Is this value determined by hardware or platform?
 (I don't see any additional potential problems for DragEvent).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17023#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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