Microsoft's Edge web browser has seen little success since its debut on Windows 10 in 2015. Built from the ground up with a new rendering engine known as EdgeHTML, Microsoft Edge was designed to be fast, lightweight, and secure, but it launched with a plethora of issues that resulted in users rejecting it early on. Edge has since struggled to gain traction, thanks to its continued instability and lack of mindshare, from users and web developers.
Because of this, I'm told that Microsoft is throwing in the towel with EdgeHTML and is instead building a new web browser powered by Chromium, which uses a similar rendering engine first popularized by Google's Chrome browser and could be the Blink rendering engine. Codenamed "Anaheim," this new browser for Windows 10 will replace Edge as the default browser on the platform, according to my sources, who wish to remain anonymous. It's unknown at this time if Anaheim will use the Edge brand or a new brand, or if the user interface (UI) between Edge and Anaheim is different. One thing is for sure, however; EdgeHTML in Windows 10's default web browser is dead.
Source: Zac Bowden | Windows Central