[tbb-bugs] #30575 [Applications/Tor Browser]: "unable to connect" if Firefox GPOs configure proxy settings

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed May 22 13:08:04 UTC 2019

#30575: "unable to connect" if Firefox GPOs configure proxy settings
 Reporter:  kT3Ycp9jwm                |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:

Comment (by kT3Ycp9jwm):

 Replying to [comment:2 gk]:
 > Hm. Did that work before and just Tor Browser 8.5 breaks now?

 no, it never worked since the policy was deployed (some months ago, but
 could manage to report it just today)

 I use it as a local account, who does not get the policy

 > The problem with GPOs is that it seems Tor Browser is happily following
 whatever the GPO is telling it. That means this could lead to a proxy
 bypass, see: #29916. We therefore set:
 `browser.policies.testing.disallowEnterprise` to `true`.

 just checked: it's already set to true, as default value

 > Does flipping that pref get things working for you again?

 unfortunately not

 > Where does the PAC file actually point to?

 proxy.pac is on an internal server domain.local/proxy.pac

 I am using Tor Browser 8.5 (based on Mozilla Firefox 60.7.0esr) (32-bit),
 updated today just before taking screenshots

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30575#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

More information about the tbb-bugs mailing list