(In reply to Magnus Melin [:mkmelin] from comment #2) > Do you mean from the standalone message window? (bug 1857953 suggests that) If you open a message in a stand-alone message window or open a compose window and then close the main window, ⌘1 still re-opens the main window when pressed while the message window or the compose window have focus. ⌘1 is actually on the Tools menu of the compose window, it's not on any menu in the stand-alone window (as far as I can see), but it still works. If you closed all windows and the Thunderbird menu is still active, these actions will return a main window: Thunderbird > Settings, Thunderbird > Account Settings, Tools > Saved Files, Tools > Add-ons and Themes. Also a click onto the dock icon as suggested in bug 1858253 comment #5.
Bug 1857953 Comment 10 Edit History
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(In reply to Magnus Melin [:mkmelin] from comment #2) > Do you mean from the standalone message window? (bug 1857953 suggests that) If you open a message in a stand-alone message window or open a compose window and then close the main window, ⌘1 still re-opens the main window when pressed while the message window or the compose window have focus. ⌘1 is actually on the Tools menu of the compose window, it's not on any menu in the stand-alone window (as far as I can see), but it still works. If you closed all windows and the Thunderbird menu is still active, these actions will return a main window: Thunderbird > Settings, Thunderbird > Account Settings, Tools > Saved Files, Tools > Add-ons and Themes. Also a click onto the dock icon as suggested in bug 1858253 comment #5. EDIT: As far as I can tell, the fix would be to a) put ⌘1 back onto some menu like in the compose window or b) wire it in like it is in the stand-alone message window.