[tbb-bugs] #21876 [Applications/Tor Browser]: e10s is not enabled on Linux (and probably OS X) by default in ESR 52 based nightlies

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#21876: e10s is not enabled on Linux (and probably OS X) by default in ESR 52 based
nightlies
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Major                                |     Resolution:
 Keywords:  ff52-esr, tbb-7.0-must-alpha,        |  Actual Points:
  TorBrowserTeam201704R                          |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by mcs):

 Replying to [comment:23 gk]:
 > Woah, we are getting e10s on Windows even without compiling the sandbox.
 (I tested it and hit #21766) It seems to work but is that a smart thing to
 have? (stability-wise etc.)

 I didn't have a chance to comment here, but yes, the sandbox is controlled
 by a separate set of #ifdef's. I guess the risk is that Firefox builds
 with the sandbox and we do not? It seems like we have quite a few e10s-
 related issues on all platforms; I am not sure if Windows is worse then
 the others or not.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21876#comment:24>
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