Rescue PC

Turn On or Off Ask to Close All Tabs in Microsoft Edge in Windows 10

add this reg key

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Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.microsoftedge_8wekyb3d8bbwe\MicrosoftEdge\Main]
"AskToCloseAllTabs"=dword:00000000

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0 = off
1 = on

if set to "0" then when you close edge it wont ask you to close all tabs

you will also need to to open the three dots top right ...
settings

old edge
open Microsoft edge with
Previous pages

new edge
on startup
Continue where you left off

hope this helps
Cheers
Rescue PC