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Re: [tor-bugs] #31591 [Applications/Tor Browser]: Feature review for ESR68

#31591: Feature review for ESR68
-------------------------------------------------+-------------------------
 Reporter:  pili                                 |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-9.0-must-alpha,                  |  Actual Points:
  TorBrowserTeam201910, GeorgKoppen201910        |
Parent ID:  #31144                               |         Points:  3
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by mikeperry):

 Ok I looked through FF68's dev docs in detail. The only thing that struck
 me as remotely concerning was the potential ability to build high
 precision timers for performance fingerprinting out of the Close Caption
 https://developer.mozilla.org/en-
 US/docs/Web/API/TextTrack/cuechange_event.. I don't think we have gone
 down that rabbithole of trying to eliminate such timers, right? And it's
 not even clear that the accuracy of this timer would be very high in the
 first place, so it might not even be possible.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31591#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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