[tbb-bugs] #15897 [Tor Browser]: Circuit Information is not displayed on Firefox error pages

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri May 1 14:17:51 UTC 2015

#15897: Circuit Information is not displayed on Firefox error pages
 Reporter:  cypherpunks                          |          Owner:  tbb-
     Type:  defect                               |  team
 Priority:  normal                               |         Status:  new
Component:  Tor Browser                          |      Milestone:
 Keywords:  SSL, Certificate, Untrusted          |        Version:
  Connection                                     |  Actual Points:
Parent ID:                                       |         Points:
 '''The issue'''
 Circuit information is not displayed on Firefox error pages "Untrusted
 Connection" or "Problem Loading Page".

 '''Why does that matter?'''
 User encounters a suspicious SSL error:

 * User can no longer visit an IP discovery website because Tor Browser
 will use a different circuit and,

 * Tor Browser does not display the circuit information.

 It's then difficult for the user to determine which exit they were using
 when they encountered the suspicious behavior.

 This obstacle might ultimately prevent users from investigating suspicious
 exits or making BadExit reports to Tor.


 Behavior described can be observed at https://mjvmobile.com.br/ (SSL
 error) or any domain that wont load.  Clicking TorButton does not display
 circuit information while on the error page.

 This happens reliably with Tor Browser 4.5 (Windows).

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15897>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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