[tor-bugs] #26607 [Applications/Tor Browser]: verify that subpixel accuracy of window scroll properties does not add fingerprinting risk

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Apr 8 08:30:40 UTC 2019


#26607: verify that subpixel accuracy of window scroll properties does not add
fingerprinting risk
-------------------------------------------------+-------------------------
 Reporter:  mcs                                  |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-fingerprinting, ff60-esr,        |  Actual Points:
  TorBrowserTeam201904                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by Thorin):

 FYI: I added a test to `window.scrollTo(0, 500.5)` and read back the
 position, and it doesn't throw any errors and rounds to an integer (tested
 on my Android). Are there any other methods that need testing?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26607#comment:16>
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