[tor-bugs] #18599 [Tor Browser]: Make sure OffScreenCanvas API does not render moot our canvas fingerprinting protection

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Mar 21 11:36:32 UTC 2016


#18599: Make sure OffScreenCanvas API does not render moot our canvas
fingerprinting protection
-----------------------------+----------------------
     Reporter:  gk           |      Owner:  tbb-team
         Type:  task         |     Status:  new
     Priority:  Medium       |  Milestone:
    Component:  Tor Browser  |    Version:
     Severity:  Normal       |   Keywords:  ff45-esr
Actual Points:               |  Parent ID:
       Points:               |   Reviewer:
      Sponsor:               |
-----------------------------+----------------------
 There is a new OffScreenCanvas API that allows running WebGL in web
 workers (e.g.). This is currently preffed of (ESR45)
 (`gfx.offscreencanvas.enabled` is set to `false`). But this sounds scary
 enough that we want to make sure that

 a) preffing off the feature renders it really unusable (we should do this
 for esr45)

 and

 b) if it is preffed on our canvas fingerprinting protections are not
 harmed (can be checked when we transtions to an esr with this feature
 enabled).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18599>
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