[tbb-bugs] #14952 [Applications/Tor Browser]: Audit HTTP/2 and SPDY if needed

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#14952: Audit HTTP/2 and SPDY if needed
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  task                                 |         Status:
                                                 |  assigned
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-linkability, tbb-usability-      |  Actual Points:
  website, tbb-performance                       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by arthuredelstein):

 Mozilla decided not to backport their patches for first-party isolation of
 AltSvc,
 https://bugzilla.mozilla.org/1334690#c16,
 so we would need to do so for TBB/ESR52,
 https://bugzilla.mozilla.org/show_bug.cgi?id=1334690#c16

 We also need to examine if there are other HTTP/2 headers or mechanisms
 that could act as supercookie vectors. (Patrick McManus mentioned alt-used
 as a possibility.) If there are, then those need to be isolated as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14952#comment:25>
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