Re: [tor-bugs] #21886 [Applications/Tor Browser]: Downloading of binary files stalls at 0/0 bytes in Tor Browser based on ESR52 with e10s off

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#21886: Downloading of binary files stalls at 0/0 bytes in Tor Browser based on
ESR52 with e10s off
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  gk
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-usability, tbb-7.0-must-alpha,   |  Actual Points:
  ff52-esr, TorBrowserTeam201705,                |
  GeorgKoppen201705                              |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
-------------------------------------------------+-------------------------

Comment (by gk):

 Replying to [comment:20 mcs]:
 > Replying to [comment:19 gk]:
 > > Alright, I think I have figured out all the pieces involved. The
 problem starts with https://bugzilla.mozilla.org/show_bug.cgi?id=1321528
 being fixed in https://hg.mozilla.org/releases/mozilla-
 beta/rev/1c4863a4ff98 AND NoScript 2.9.5.2rc3 (commit
 9eab569b1d443456325e2b253f2cca65eb453c30 in the git repo at
 https://github.com/avian2/noscript). The whole suspend/resume mechanism
 got introduced there to fix the mediasource blocking for us. ;)
 >
 > Interesting. NoScript's role is confusing to me. Are you saying that
 NoScript relies on the fix for
 https://bugzilla.mozilla.org/show_bug.cgi?id=1321528 and that the same
 Mozilla fix causes this bug?

 No, NoScript does not rely on the fix. But it does channel
 suspense/resumse things starting with 2.9.5 (and the fixup in 2.9.5.2rc3)
 which is causing the problems. The Mozilla bugfix is the necessery bit on
 Mozilla's side to trigger the problem: if either that or Noscript is
 missing (or NoScript before 2.9.5.2rc3 is installed) the problem in this
 bug goes away.

 > > While I don't have assembled all of the pieces to a coherent picture
 yet, the proposed attached fix seems to be a good idea to me. mcs/brade:
 That one works across different platforms, right? If so, do you think you
 want to propose that one for review?
 >
 > No, the fix we proposed does not work on Linux (at least not for us).
 See comment:16.

 Well, that's not the same as in the attachment which is why I was asking.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21886#comment:21>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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