[tbb-bugs] #31457 [Applications/Tor Browser]: disable per-installation profiles

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#31457: disable per-installation profiles
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 Reporter:  mcs                             |          Owner:  tbb-team
     Type:  defect                          |         Status:  new
 Priority:  Medium                          |      Milestone:
Component:  Applications/Tor Browser        |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  ff68-esr, tbb-9.0-must-nightly  |  Actual Points:
Parent ID:                                  |         Points:
 Reviewer:                                  |        Sponsor:
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Comment (by boklm):

 It seems the `MOZ_LEGACY_PROFILES` environment variable can be set to
 disable this feature. On Linux we could set it in the start script,
 however I'm not sure we can easily set environment variables on Windows
 and macOS, so maybe patching to disable it will be needed.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31457#comment:3>
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