[tor-bugs] #30372 [Applications/Tor Browser]: Backport Letterboxing

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#30372: Backport Letterboxing
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 Reporter:  tom                                  |          Owner:  tbb-
                                                 |  team
     Type:  enhancement                          |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-fingerprinting-resolution,       |  Actual Points:
  TorBrowserTeam201905R, GeorgKoppen201905       |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by tom):

 The last patch in the series I posted above has landed as
 https://hg.mozilla.org/mozilla-central/rev/6d2d7856e468 so the last two
 patches in that branch can be dropped in favor of this single one.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30372#comment:12>
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