Microsoft Edge and Application Guard for Windows 10 Pro [View all]

That's what Edge looks like while using Application Guard on my copy of Windows 10 Pro Build 17063 (a beta version)
Here's an explanation:
https://blogs.windows.com/windowsexperience/2017/12/19/announcing-windows-10-insider-preview-build-17063-pc/#toR0qJ90x6Ejt08h.97
Windows Defender Application Guard (WDAG) update: You spoke, and we listened. Microsoft is bringing Windows Defender Application Guard to Windows 10 Professional in the next feature update of Windows 10. Now, like Windows 10 Enterprise users, Windows 10 Pro Users can navigate the Internet in Application Guard knowing their systems are protected from even the most sophisticated browser attacks.
Windows Defender Application Guard provides unprecedented protection against targeted threats using Microsofts industry leading Hyper-V virtualization technology. Check out this recent RSA talk on Window Defender Application Guard if youd like to understand this feature in some more detail.
It is available now to our awesome Windows Insider community to give it a try and we would like to hear your feedback.
For more details please see our tech community page.
Here's the more technical explanation:
https://techcommunity.microsoft.com/t5/Windows-Insider-Program/Announcing-WDAG-in-PRO-SKU/m-p/133395#M701
Caveats: Yes, I know many dislike Edge. Just giving one more option if you use W10 Pro in the future. This feature was only available in W10 Enterprise before. Hopefully this will provide Edge with even more security, to make it a better option.