[tor-bugs] #20300 [Applications/Tor Browser]: Unable to launch Tor browser

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#20300: Unable to launch Tor browser
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 Reporter:  grobin                    |          Owner:
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by gk):

 Replying to [comment:7 mcs]:
 > Replying to [comment:4 gk]:
 > > mcs/brade: FWIW: it seems to me we have more than one user reporting
 this kind of problem. I wonder what is going on given that we did not
 change anything control port related in the stable release...
 >
 > This problem occurs because once TB 6.5a3 is opened, the alpha versions
 of Torbutton and Tor Launcher are copied into the user's profile. If that
 same profile is used when they later switch back to TB 6.0.x, the
 extensions are not downgraded. This means that the alpha extensions are
 used with our stable release, which is not ideal.

 But that's not what seems to have happened in this (and other) cases (see:
 comment:2):
 {{{
 Definitely did not try to use one of the pilot versions so don't think
 this is it.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20300#comment:9>
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