[tor-bugs] #4754 [Torbutton]: Firefox fails to start if Torbutton is enabled and the network is inaccessible.

[Tor Bug Tracker & Wiki]

#4754: Firefox fails to start if Torbutton is enabled and the network is
inaccessible.
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 Reporter:  katmagic   |          Owner:  mikeperry
     Type:  defect     |         Status:  new      
 Priority:  blocker    |      Milestone:           
Component:  Torbutton  |        Version:           
 Keywords:             |         Parent:           
   Points:             |   Actualpoints:           
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Comment(by rransom):

 Replying to [ticket:4754 katmagic]:
 > If Torbutton is enabled when Firefox boots, it makes two requests to
 check.torproject.org through Tor. If this request fails, Torbutton will
 simply try again, and again, and again, and again… Until a successful
 request is made, Firefox will not start.

 I tested this in TBB 2.2.35-4, using “`MapAddress check.torproject.org
 1.1.1.1`” to cause all connection attempts to check.tpo to fail, and
 didn't see any retries.  (I saw one pair of streams attempting to connect
 to 1.1.1.1:443 before the TBB-Firefox window appeared, and one pair after
 the TBB-Firefox window appeared for the home-page load.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4754#comment:6>
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