[tor-bugs] #31730 [Applications/Tor Browser]: Revert aarch64 fixup for ESR 60-based bundles with Tor Browser 9

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#31730: Revert aarch64 fixup for ESR 60-based bundles with Tor Browser 9
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-mobile, tbb-parity,              |  Actual Points:
  TorBrowserTeam201910R tbb-9.0-must             |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by sysrqb):

 * keywords:  tbb-mobile, tbb-parity, TorBrowserTeam201910R, tbb-9.0-must =>
     tbb-mobile, tbb-parity, TorBrowserTeam201910R tbb-9.0-must
 * status:  needs_review => needs_revision


Comment:

 If I was smart, I would've saved the current prefs somehow before we
 overwrote them, but I didn't think about that. Unfortunately, I'm worried
 about changing these. On the one hand, custom prefs aren't recommended but
 they are allowed. If we change this without notifying the user then we
 could be putting them at risk. We should probably include a warning about
 this in the release announcement, at a minimum.

 I think we should set `kCustomPref` as `false` if all the prefs are set as
 level 4. What do you think? Can you add a function
 `isSecurityLevel(index)` that takes an index and iterates through
 `kSecuritySettings`, returns true if they match the expected value and
 false otherwise? Or something like this?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31730#comment:5>
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