[tbb-bugs] #21785 [Applications/Tor Browser]: Keep an eye on the Storage API

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Mar 20 20:17:04 UTC 2017

#21785: Keep an eye on the Storage API
     Reporter:  gk                   |      Owner:  tbb-team
         Type:  task                 |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  ff52-esr, tbb-
     Severity:  Normal               |  fingerprinting
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:                       |
 The Storage API (https://developer.mozilla.org/en-
 US/docs/Web/API/Storage_API) is the API that
 defines a common, shared storage system to be used by all APIs and
 technologies that store content-accessible data for individual Web sites.
 The Storage API gives sites' code the ability to find out how much space
 they can use, how much they are already using, and even control whether or
 not they need to be alerted before the user agent disposes of site data in
 order to make room for other things.
 We should think about neutering its fingerprinting/linkability potential.
 For now it seems it is disabled by `dom.storageManager.enabled` set to
 `true`. We should verify that for ESR52, though.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21785>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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