[tor-bugs] #30845 [Applications/Tor Browser]: Make sure default Firefox themes are enabled on ESR68

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#30845: Make sure default Firefox themes are enabled on ESR68
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 Reporter:  acat                      |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  ff68-esr                  |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:  Sponsor44-can
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Comment (by acat):

 This also fixes the issue in current esr68 nightly that search engine
 icons disappear after restarting the Tor Browser. Note that the value
 `extensions.enabledScopes = 5` comes from (`AddonManager.SCOPE_PROFILE=1 |
 AddonManager.SCOPE_APPLICATION=4`).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30845#comment:2>
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