When quitting Thunderbird, visible tabs will be saved and will be restored when you open Thunderbird the next time. There is also a Tab menu on the Tab toolbar to help you switch between Tabs.
Quando tu quita Thunderbird, le schedas visibile es salvate e se restaura quando tu aperi Thunderbird le proxime vice. Il ha etiam un menu Schedas sur le barra de instrumentos Schedas que te adjuta a commutar inter schedas.