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