This sounds like a connectivity/network driver issue, rather than a problem with thunderbird.
** Also affects: network-manager (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1870111 Title: Thunderbird freezes graphical session except mouse cursor on second launch or clicking the icon after email setup on the first launch Status in network-manager package in Ubuntu: New Status in thunderbird package in Ubuntu: Incomplete Bug description: When Launching thunderbird (pinned on Favourites) from the dock/dash it shows 2 orange dots on default theme that is one for email setup and the other for the main window. After setting up an email and closing the email config window, the two dots are still shown on the dash/dock before the icon. Thunderbird causes the graphical session except for the mouse cursor to freeze until I switch to a TTY and reboot. Also when closing thunderbird, one dot is shown and when launching the application the graphical session except for mouse cursor freezes. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: thunderbird 1:68.4.1+build1-0ubuntu0.19.10.1 ProcVersionSignature: Ubuntu 5.3.0-45.37-generic 5.3.18 Uname: Linux 5.3.0-45-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.7 Architecture: amd64 BuildID: 20200110143530 CurrentDesktop: ubuntu:GNOME Date: Wed Apr 1 13:26:59 2020 DefaultProfileExtensions: extensions.sqlite corrupt or missing DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) DefaultProfileLocales: extensions.sqlite corrupt or missing DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/thunderbird/omni.ja:greprefs.js:1141 DefaultProfileThemes: extensions.sqlite corrupt or missing InstallationDate: Installed on 2020-03-31 (1 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=68.4.1/20200110143530 SourcePackage: thunderbird UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1870111/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp