[tbb-bugs] #16747 [Tor Browser]: Tor-browser downloads favicon twice (was: Tor-browser downloads images twice)

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#16747: Tor-browser downloads favicon twice
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     Reporter:  cypherpunks  |      Owner:  tbb-team
         Type:  defect       |     Status:  reopened
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |    Sponsor:
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Changes (by cypherpunks):

 * status:  closed => reopened
 * resolution:  worksforme =>


Comment:

 This is still an issue with TB 5.5a3.
 Single request for / with embedded image from my httpd logs:

  * $exitIP1 - "GET / HTTP/1.1" 200 "-" "Mozilla/5.0 (Windows NT 6.1;
 !rv:38.0) Gecko/20100101 Firefox/38.0"

  * $exitIP1 - "GET /content.gif HTTP/1.1" 200 "!http://domain.tld/"
 "Mozilla/5.0 (Windows NT 6.1; !rv:38.0) Gecko/20100101 Firefox/38.0"

  * $exitIP2 - "GET /favicon.ico HTTP/1.1" 200 "-" "Mozilla/5.0 (Windows NT
 6.1; !rv:38.0) Gecko/20100101 Firefox/38.0"

  * $exitIP1 - "GET /favicon.ico HTTP/1.1" 200 "-" "Mozilla/5.0 (Windows NT
 6.1; !rv:38.0) Gecko/20100101 Firefox/38.0"

 $exitIP1 is the IP shown for the circuit in Torbutton. IP2 confirmed via
 Atlas as Exit.
 So it's not images per se, but favicons that get fetched a second time,
 via unrelated circuit.
 Privacy implications?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16747#comment:4>
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