[tor-bugs] #31300 [Applications/Tor Launcher]: modify Tor Launcher so it is compatible with ESR68

[Tor Bug Tracker & Wiki]

#31300: modify Tor Launcher so it is compatible with ESR68
-------------------------------------+-------------------------------------
     Reporter:  mcs                  |      Owner:  brade
         Type:  defect               |     Status:  assigned
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Launcher                           |   Keywords:  ff68-esr,
     Severity:  Normal               |  TorBrowserTeam201907, tbb-9.0-must-
                                     |  nightly
Actual Points:                       |  Parent ID:
       Points:                       |   Reviewer:
      Sponsor:                       |
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 In addition to removal of overlays (#29197), we must make other changes in
 Tor Launcher for ESR68 compatibility. For example, most of the "on" event
 attributes within XUL wizard elements have been replaced with events.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31300>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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