[tbb-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:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-6.5-regression,                  |  Actual Points:
  TorBrowserTeam201702, GeorgKoppen201702        |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 Session Manager does not like it that
 `chrome://sessionmanager/locale/sessionmanager.dtd` and
 `chrome://sessionmanager/locale/options.dtd` are blocked by our fix for
 #8725. Things like `&toolbar.tooltip` need to be available for content
 after the first installation. HolD: does adding the toolbar buttons
 manually to the toolbar work for you?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21396#comment:6>
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