[tbb-bugs] #13875 [Tor Browser]: Tor Browser DPI spoofing is broken if the user changes zoom level

[Tor Bug Tracker & Wiki]

#13875: Tor Browser DPI spoofing is broken if the user changes zoom level
-----------------------------+--------------------------------
     Reporter:  isis         |      Owner:  tbb-team
         Type:  defect       |     Status:  closed
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:  duplicate    |   Keywords:  tbb-fingerprinting
Actual Points:               |  Parent ID:
       Points:               |
-----------------------------+--------------------------------
Changes (by gk):

 * status:  new => closed
 * resolution:   => duplicate


Comment:

 Replying to [comment:4 poly]:
 > hello, poly here. Sorry for the late reply, I'm just getting used to the
 trac system.
 >
 > I created a writeup (with photos!) to clarify the windows dpi scaling
 and another POC to show that the actual zoom level can be inferred. Skip
 to the description section for the relevant stuff. Can anyone try the
 second POC and comment on how reliable it is?

 I did often get no zoom level back while zooming around but maybe that's
 just because the zoom level was not exactly hard-coded. But I could
 confirm that #4316 is fixed, thanks. That said this ticket is a duplicate
 of #8076.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13875#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online