[tor-bugs] #21396 [Applications/Tor Browser]: Torbutton breaks Session Manager addon

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#21396: Torbutton breaks Session Manager addon
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     Reporter:  HolD                      |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Tor Browser 6.5, Torbutton 1.9.6.12. After installing Session Manager
 (https://addons.mozilla.org/en-US/firefox/addon/session-manager/) it is
 not visible in Tools menu or as a toolbar button. This is a regression.
 Issue is confirmed:
 https://blog.torproject.org/comment/reply/1301/232647
 https://blog.torproject.org/comment/reply/1301/233041
 https://blog.torproject.org/comment/reply/1301/233344

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21396>
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