Re: [tor-bugs] #28823 [Applications/Tor Browser]: Every web page crashes on Windows 7 with Tor Browser 8

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

#28823: Every web page crashes on Windows 7 with Tor Browser 8
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 Reporter:  testcy                    |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  High                      |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-crash                 |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by tom):

 I spoke with aklotz about this.  This is almost certainly third party
 code; probably Comodo but potentially something else on the user's
 machine.

 The crashes are likely happening on process start. The best way to try and
 diagnose this would be to figure out the dll's loaded by the process.

 I think the easiest and most detailed way to collect this information
 would be to use Process Monitor.  https://docs.microsoft.com/en-
 us/sysinternals/downloads/procmon

 You can set process monitor to record only events for the Tor Browser
 process; and you can omit the registry and network connection event types
 and record only process and filesystem activity.

 Collect a log of the process starting up and crashing (ideally as quickly
 as possible, so there's not a ton of events to sift through - you can
 clear the log and try a few times if needed.)  The value of
 browser.tabs.remote.autostart should not matter as long as the process
 crashes - set it to whatever will make it crash fastest.

 This log should show dll load events (and the corresponding location they
 come from) that would help us figure out what the offending program is.

 It would be great if this could be done after Comodo is uninstalled to
 remove that from the equation. (It could be that Comodo lingers after you
 uninstall it, or something else is on the system.)

 This log will have personal data in it: your operating system username for
 certain, and potentially other machine characteristics. It should not
 contain browsing history, MAC address, IP Address or other highly personal
 information; but none the less I wouldn't want you to post it online.

 I'll gk confirm this is an acceptable path forward and provide details on
 how to provide the data safely and who at Tor will have access to it.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28823#comment:24>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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