Thunderbird opens duplicate window on start
Latest Thunderbird version 38.4.0 (reinstall was not help) shows main window and after 2 seconds another one with the same content.
Latest Thunderbird version 38.4.0 (reinstall was not help) shows main window and after 2 seconds another one with the same content.
Alla svar (1)
Sound like an addon we know - minimizetottray.
Does problem go away if you start Thunderbird in safe mode?
https://support.mozilla.org/en-US/kb/safe-mode