[tor-bugs] #12523 [Applications/Tor Browser]: Backport Firefox patch to mark JIT pages as non-writable

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#12523: Backport Firefox patch to mark JIT pages as non-writable
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 Reporter:  gk                                   |          Owner:  mcs
     Type:  enhancement                          |         Status:
 Priority:  Medium                               |  needs_review
Component:  Applications/Tor Browser             |      Milestone:
 Severity:  Normal                               |        Version:
 Keywords:  tbb-security, tbb-firefox-patch,     |     Resolution:
  tbb-hardened, TorBrowserTeam201606R            |  Actual Points:
Parent ID:  #12653                               |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by arthuredelstein):

 I frankly don't understand the JIT code at all, but the backports here
 don't have any errors that I can see. If I understand correctly, we need
 to add a --non-writable-jitcode flag to our mozconfigs for this to take
 effect.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12523#comment:20>
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