[tor-bugs] #3820 [TorBrowserButton]: Fix a warning and potential issue with session store filter

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#3820: Fix a warning and potential issue with session store filter
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 Reporter:  mikeperry                        |          Owner:  mikeperry                    
     Type:  defect                           |         Status:  new                          
 Priority:  major                            |      Milestone:  TorBrowserBundle 2.2.x-stable
Component:  TorBrowserButton                 |        Version:                               
 Keywords:  MikePerryIterationFires20110828  |         Parent:                               
   Points:  1                                |   Actualpoints:                               
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 The warning "No tab found for session store tag" can appear during "New
 Identity" in TBB. This is due to a lack of proper context for the browser
 object. It may also indicate a leak of sessionstore data to disk.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3820>
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