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



#18599: Make sure OffScreenCanvas API does not render moot our canvas
fingerprinting protection
---------------------------------+--------------------------
 Reporter:  gk                   |          Owner:  mcs
     Type:  task                 |         Status:  accepted
 Priority:  Medium               |      Milestone:
Component:  Tor Browser          |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:  ff45-esr, tbb-6.0a5  |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
---------------------------------+--------------------------

Comment (by mcs):

 Kathy and I reviewed the implementation of this feature and also ran some
 manual tests. We are convinced that this feature is fully disabled by the
 gfx.offscreencanvas.enabled = false setting, so we should be OK for ESR45.
 I suggest changing the keywords field on this ticket to ff52-esr.

 It is also worth noting that Mozilla's automated tests for offscreen
 canvas are in dom/canvas/test/test_offscreencanvas*.html but they always
 set gfx.offscreencanvas.enabled = true.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18599#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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