[tbb-bugs] #17207 [Tor Browser]: Testing navigator.mimeTypes for known names can reveal info and increase fingerprinting risk

[Tor Bug Tracker & Wiki]

#17207: Testing navigator.mimeTypes for known names can reveal info and increase
fingerprinting risk
-------------------------------+--------------------------------
     Reporter:  TemporaryNick  |      Owner:  tbb-team
         Type:  defect         |     Status:  needs_information
     Priority:  normal         |  Milestone:
    Component:  Tor Browser    |    Version:
   Resolution:                 |   Keywords:  tbb-fingerprinting
Actual Points:                 |  Parent ID:
       Points:                 |    Sponsor:
-------------------------------+--------------------------------
Changes (by gk):

 * keywords:  fingerprinting => tbb-fingerprinting
 * status:  new => needs_information


Comment:

 I just tested with an en-US 5.0.3 on Windows 7 and all I get is
 {{{
 navigator.mimeTypes.length not > 0
 }}}
 Did you try with a fresh, unmodified Tor Browser 5.0.3? What Windows
 version did you use? How can I reproduce your problem if it still
 persists?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17207#comment:4>
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