[Bug 1811105] Re: Browser hangs when 'open with' dialog opens.

[Debbie]

** Description changed:

- 1) Ubuntu 18.04.1 LTS x86_64 with GNOME 3.28.3.
+ 1) Ubuntu 18.04.1 LTS x86_64 with GNOME 3.28.3., XFCE 4.12.2, Thunderbird 60.9.0, Xed 1.4.6
  2) Firefox: Installed: 64.0+build3-0ubuntu0.18.04.1
  3) Dialog box 'open as' to respond to click events in elements and whole browser not get inoperable.
  4) Dialog box 'open as' hangs, gets inoperable to click commands (close, cancel, ok, save file) when trying to open some attacked file.
  
  My browser started to hang when the dialog 'open as' appears. It's very
  useful since it quickly opens an attached file from gmail or browsing
  pdf/doc files.
  
  When the dialog opens, both the dialog and the browser window get
  extremely slow and i have to click several times for the dialog to
  close. No other button responds and sometimes the crash dialog asks if i
  want to force quit or wait.
  
  I'm having this problem for two weeks now and got so annoyed that sadly
  had to switch back to chrome. This is a very nice feature that doesn't
  work on said browser.
  
  I already uninstalled/installed, cleaned data and installed a nightly
  build without success. I suspect it's something related to window
  manager or nautilus.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: firefox 64.0+build3-0ubuntu0.18.04.1
  ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic x86_64
  AddonCompatCheckDisabled: False
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  guilherme   3261 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  guilherme   3261 F.... pulseaudio
  BuildID: 20181207224003
  Channel: Unavailable
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan  9 13:28:59 2019
  Extensions: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
  IfupdownConfig:
-  # interfaces(5) file used by ifup(8) and ifdown(8)
-  auto lo
-  iface lo inet dhcp
+  # interfaces(5) file used by ifup(8) and ifdown(8)
+  auto lo
+  iface lo inet dhcp
  IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
  InstallationDate: Installed on 2016-11-14 (785 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  IpRoute:
-  default via 192.168.0.1 dev wlp3s0 proto dhcp metric 600 
-  169.254.0.0/16 dev wlp3s0 scope link metric 1000 
-  172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown 
-  192.168.0.0/24 dev wlp3s0 proto kernel scope link src 192.168.0.104 metric 600
+  default via 192.168.0.1 dev wlp3s0 proto dhcp metric 600
+  169.254.0.0/16 dev wlp3s0 scope link metric 1000
+  172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
+  192.168.0.0/24 dev wlp3s0 proto kernel scope link src 192.168.0.104 metric 600
  Locales: extensions.sqlite corrupt or missing
  PrefSources: prefs.js
  Profiles: Profile0 (Default) - LastVersion=64.0/20181207224003
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  Themes: extensions.sqlite corrupt or missing
  UpgradeStatus: Upgraded to bionic on 2018-08-21 (140 days ago)
  dmi.bios.date: 11/25/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 234
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: K45A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No  Asset  Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr234:bd11/25/2014:svnASUSTeKCOMPUTERINC.:pnK45A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnK45A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.family: K
  dmi.product.name: K45A
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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Title:
  Browser hangs when 'open with' dialog opens.

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