[tor-bugs] #23875 [Applications/Tor Browser]: Facebook's onion site is a single hop onion, but clicking on the Tor onion icon shows that it is a 6 hop circuit.

[Tor Bug Tracker & Wiki]

#23875: Facebook's onion site is a single hop onion, but clicking on the Tor onion
icon shows that it is a 6 hop circuit.
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 Reporter:  Dbryrtfbcbhgf                 |          Owner:  tbb-team
     Type:  defect                        |         Status:  new
 Priority:  Medium                        |      Milestone:
Component:  Applications/Tor Browser      |        Version:
 Severity:  Normal                        |     Resolution:
 Keywords:  tbb-circuit-display, ux-team  |  Actual Points:
Parent ID:                                |         Points:
 Reviewer:                                |        Sponsor:
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Comment (by teor):

 Replying to [comment:4 dgoulet]:
 > Replying to [comment:3 gk]:
 > > dgoulet: What do we need to check for deciding whether we have a
 single onion service vs. a "normal" one?
 >
 > For v2 services (current scheme of 16 char .onion), you can't know. The
 service descriptor doesn't advertise such a thing.
 >
 > For v3 services (>= 0.3.2), the service will put in its descriptor
 `single-onion-service` so by fetching it, a client will know.

 That's not quite true: the service will advertise that it *tries* to make
 one-hop circuits. But some circuits will be 3-hops if the rendezvous point
 is unreachable or fails.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23875#comment:9>
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