Multiple windows in ThunderbirdPosted: August 2, 2013
When you start Thunderbird it opens several windows. When you quit it it closes all those windows at once. When you restart it, it reopens all those windows again. And so on again and again.
It is a bug in Thunderbird. It comes into effect when the “close” button at the windows border is clicked.
To avoid this behavior, close extra windows using the command menu “File -> Close”.
Now Thunderbird shall not reopen the unnecessary windows.