[tor-bugs] #21766 [Applications/Tor Browser]: Tor Browser based on ESR52 with e10s enabled crashed while trying to download a file

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#21766: Tor Browser based on ESR52 with e10s enabled crashed while trying to
download a file
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  mcs
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Critical                             |     Resolution:
 Keywords:  ff52-esr, tbb-7.0-must-alpha, tbb-   |  Actual Points:
  e10s, tbb-crash, TorBrowserTeam201705          |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Comment (by gk):

 While pondering #21886 I was wondering whether it would help to just get
 rid of the observer idea and leave the extension out of the picture: could
 we just show a dialog at places where we are currently using the observer
 mechanism?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21766#comment:24>
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