[tor-bugs] #18844 [Applications/Tor Browser]: browser hangs when clicking in bookmarks window

[Tor Bug Tracker & Wiki]

#18844: browser hangs when clicking in bookmarks window
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     Reporter:  cypherpunks               |      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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 Steps to reproduce:

 1) Bookmarks -> Show All Bookmarks
 2) Under the "All Bookmarks" heading in the list on the left side of the
 window, click on "Bookmarks Toolbar" or "Bookmarks Menu"

 Expected result:
 Seeing the contents of those subfolders in a timely fashion.

 Actual result:
 Entire browser stops accepting keyboard and mouse input for ~30 seconds.
 Browser may remain sluggish afterwards until relaunched.

 The other items in the list do not exhibit this problem, just those two
 subfolders.

 I have observed this on SubgraphOS (Debian, using xpra as an X proxy) but
 someone in the #subgraph channel reproduced it without xpra too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18844>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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