[tbb-bugs] #27949 [Applications/Tor Browser]: Wrong circuit & padlock displayed when using an onion service through Alt-Svc discovery

[Tor Bug Tracker & Wiki]

#27949: Wrong circuit & padlock displayed when using an onion service through Alt-
Svc discovery
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 Reporter:  nicoo   |          Owner:  tbb-team
     Type:  defect  |         Status:  new
 Priority:  Medium  |      Component:  Applications/Tor Browser
  Version:          |       Severity:  Normal
 Keywords:          |  Actual Points:
Parent ID:          |         Points:
 Reviewer:          |        Sponsor:
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 TBB version 8.5a2, Linux/amd64

 When connecting to a website that offers an onion service through the Alt-
 Svc header, the circuit (and padlock icon) aren't updated when the browser
 reconnects through the onion service.

 I confirmed the bug occurs by connecting to an endpoint, on an Alt-Svc-
 enabled service, that returns “tor” when going over an exit node and
 “onion” when going over the onion service:

   https://www.facebook.com/si/proxy

 (This is a facebook-internal endpoint, and I will replace the suggested
 reproduction endpoint once I setup an Alt-Svc-enabled website and
 reproduce the issue on it.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27949>
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