[tor-bugs] #16747 [Tor Browser]: Tor-browser downloads favicon twice (and over different circuits)

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri Jan 8 14:59:40 UTC 2016


#16747: Tor-browser downloads favicon twice (and over different circuits)
-----------------------------+-----------------------------------
 Reporter:  cypherpunks      |          Owner:  tbb-team
     Type:  defect           |         Status:  needs_information
 Priority:  Medium           |      Milestone:
Component:  Tor Browser      |        Version:
 Severity:  Major            |     Resolution:
 Keywords:  tbb-linkability  |  Actual Points:
Parent ID:                   |         Points:
  Sponsor:                   |
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Comment (by cypherpunks):

 Replying to [comment:10 gk]:
 > Interesting. FWIW: I see favicon requests in the browser console. Still,
 looking at the log output visiting mozilla.org shows everything goes over
 the same circuit. What OS are you on?

 I'm on Win10 x64 and you can scratch my previous observations, I was
 testing a bunch of sites after flipping the aforementioned pref, obviously
 the requests on my site went away but mozilla.org didn't break because
 they don't reference a favicon, but because the secondary circuit must
 have timed out.


 > Yes, please. I assumed you were using Linux. If you extract the Tor
 Browser and change into the tor-browser_LOCALE directory, starting Tor
 Browser with `./start-tor-browser.desktop --log` should give you a `tor-
 browser.log` file in the same directory. If you set the Torbutton logging
 to level 3 as described you should see the circuit isolation at work.

 Can't get this to work on Windows.

 > > Btw: opening 'Page Info' triggers resource fetches via unrelated
 circuits, too.
 > Yeah, that's annoying and #15555 assuming you meant the view-source
 feature.

 No, I'm talking about Tools >> Page Info, or right-clicking in a page >>
 View Page Info, clicking the lock or globe in the URL-bar >> more
 information is another way to open this, don't even need to select the
 media tab there.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16747#comment:11>
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