[tor-bugs] #13019 [Tor Browser]: New locale fingerprinting capabilities in FF31ESR

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#13019: New locale fingerprinting capabilities in FF31ESR
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     Reporter:           |      Owner:  arthuredelstein
  mikeperry              |     Status:  needs_revision
         Type:  defect   |  Milestone:
     Priority:  major    |    Version:
    Component:  Tor      |   Keywords:  ff31-esr, tbb-fingerprinting,
  Browser                |  TorBrowserTeam201503, tbb-4.5-alpha
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
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Comment (by gk):

 Replying to [comment:30 arthuredelstein]:
 > Replying to [comment:29 gk]:
 > > Setting `javascript.use_us_english_locale` to `false` does not change
 anything wrt to the differing date formats (at least not on OS X nor on
 Linux; I currently don't have an en-US Windows available to test).
 >
 > I just tested it on OS X, and it is working for me. However, if you are
 running Tor Browser from the command line, it is necessary to make sure
 that the shell locale is set to something other than English.

 I think you misunderstood me. While testing I realized that you can infer
 the underlying OS if you just get an english date format back as the
 particular english date format used differs across OSes. This was somewhat
 surprising to me. Setting the pref above to `false` did not change that.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13019#comment:31>
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