I had just put this (hang on) in a couple of other MS Tech Forums to which, I contribute. Then take a look at the window produced if you, in Edge C > ellipsis > New Application Guard window.
From Windows 10
For anyone who has not done this, already, you are, certainly, urged to do it.
> Settings > Windows Security > App & browser control ... scroll down to Isolated browsing
Click on Install Windows Defender Application Guard.
In the resulting dialogue window scroll down to Windows Defender Application Guard. Put a check in its box and hit OK... that will immediately be followed by a window asking to Reboot Now or Later (to complete). Reboot.
And from Edge C
It syncs after the User signs-in (icon left of ) OR your Home page sign-in.
The 1st item is the OS, Win10 & its browser working together. Anyway, looked at together, thought y'all might find it or this very interesting.
PS: Anyone (else) old enough to remember Arte Johnson?