see bug 1745599#c8 If the solution regarding editing the session.json file seems too daunting : Help > More Troubleshooting Information Under 'Application Basics' - half way locate 'Profile Folder' - click on 'Open Folder' Window opens showing contents of profile name folder. Exit Thunderbird now. Delete the 'session.json' file Start Thunderbird. Report on results.
Bug 1735531 Comment 11 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
see bug 1745599 comment 8 If the solution regarding editing the session.json file seems too daunting : Help > More Troubleshooting Information Under 'Application Basics' - half way locate 'Profile Folder' - click on 'Open Folder' Window opens showing contents of profile name folder. Exit Thunderbird now. Delete the 'session.json' file Start Thunderbird. Report on results.
see bug 1745599 comment 8 If the solution regarding editing the session.json file seems too daunting : Help > More Troubleshooting Information Under 'Application Basics' - half way locate 'Profile Folder' - click on 'Open Folder' Window opens showing contents of profile name folder. Exit Thunderbird now. Delete the 'session.json' file Start Thunderbird. Report on results.