At startup, I need Thunderbird to open to the list of messages in the Inbox without user interaction. Every time. Nothing else. I need it to look like the attached screen capture. I am running 78.3.1 (32-bit) on Windows 10. I was using the following process but it quit working on a recent update: 1) Open Thunderbird and click on desired mail folder. 2) Close TB. 3) Use Windows Explorer to navigate to where "session.json" file is located. Mine was, "C:\Users\Administrator\AppData\Roaming\Thunderbird\Profiles\7a4c8p7s.default", but yours will be different. You can locate it by right-clicking on the mail folder from inside TB, then click "Properties". Make sure TB is not running before proceeding to step #4. 4) Right-click on "session.json" file then click, "Properties". Check mark the "Read-only" attribute box then click the "OK" button.