Microsoft is virtualizing the Edge browser in Window 10 to improve safety for users as shared below:

https://blogs.windows.com/windowsexperience/2016/09/26/new-windows-10-and-office-365-features-for-the-secure-productive-enterprise/

Today we announced a new addition to the extensive Windows 10 security stack with a revolutionary security improvement to Microsoft Edge. Windows Defender Application Guard uses virtualization-based security technology to protect against advanced attacks coming from the Internet, helping to protect the enterprise’s devices, employees, data and even their corporate networks. This level of protection has never been more important, as the majority of attacks start in the browser.

Unlike other browsers that use software-based sandboxes, which still provide a pathway for malware and vulnerability exploits, Microsoft Edge’s use of Application Guard isolates the browser and employee activity using a hardware-based container to prevent malicious code from impacting the device and moving across the enterprise network. This robust security service helps protect enterprises from malware, viruses, vulnerabilities, and even zero-day attacks. Once enabled, enterprise administrators can configure a trusted network site list policy and distribute the group policy to any devices it wishes to protect with Application Guard. Even if an untrusted site successfully loads malware, the malware is unable to reach beyond the isolated container to steal data or permanently compromise devices or the network. Once the employee exits their Microsoft Edge browsing session, any malware is erased, preventing further attacks.