[tor-bugs] #29916 [Applications/Tor Browser]: Group Policies for Firefox can bypass Tor Browser's proxy settings

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#29916: Group Policies for Firefox can bypass Tor Browser's proxy settings
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-proxy-bypass,                    |  Actual Points:
  TorBrowserTeam201904                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 Replying to [comment:1 tom]:
 > Hm. I haven't found this code yet. This is referring to the Windows
 Group Policy mechanism, and not the Firefox policy mechanism, right?

 Good question: I'd say, yes, but I am not sure as I don't know much about
 group policies. The report says "If a GPO policy tells Firefox to use
 system proxy setting" and says, that a specific key is written to the
 registry which seems to cause Tor Browser to ignore its own proxy
 settings.

 > I think we should wire up both to be ignored when
 MOZ_PROXY_BYPASS_PROTECTION is enabled

 Agreed.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29916#comment:2>
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