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How to invoke Thunderbird confirm shift+delete pop-up

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On my new Windows 10 PC with the latest version of Thunderbird (52.2.0 32 bit) when shift+delete is applied to a selected message a pop-up window appears asking "This will delete messages immediately, without saving a copy to Deleted. Are you sure you want to continue?" with buttons "Delete" and Cancel". On my Windows 7 laptop with the same version of Thunderbird the same shift+delete applied to a selected message results in immediate deletion without the confirmation pop-up window. How can I modify the laptop Thunderbird to ensure that the "confirm delete" pop-up window appears before deletion?

On my new Windows 10 PC with the latest version of Thunderbird (52.2.0 32 bit) when shift+delete is applied to a selected message a pop-up window appears asking "This will delete messages immediately, without saving a copy to Deleted. Are you sure you want to continue?" with buttons "Delete" and Cancel". On my Windows 7 laptop with the same version of Thunderbird the same shift+delete applied to a selected message results in immediate deletion without the confirmation pop-up window. How can I modify the laptop Thunderbird to ensure that the "confirm delete" pop-up window appears before deletion?
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Chosen solution

Go to Options => Advanced => Config editor and set mail.warn_on_shift_delete = true

You also may find interesting mail.warn_on_delete_from_trash = true

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Seçilmiş Həll

Go to Options => Advanced => Config editor and set mail.warn_on_shift_delete = true

You also may find interesting mail.warn_on_delete_from_trash = true

Modified by TyDraniu

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Perfect. Many thanks indeed for the very prompt and accurate response