Close, minimize and resize buttons are inactive on the main window

My email client is the beta version of 41. I just upgraded the sys op to version 10 of Windows version 7.

The close, minimize and resize buttons are inactive on the Thunderbird main window when running on Windows version 10. These buttons are active on other windows such as the address book and new message. Ctrl W keys work on the main as Alt and then exit.

Is there a reason that the buttons are inactive on the main window?

https://support.Mozilla.org/questions/1082823

Tags: Thunderbird

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