Recent rumors were real: Microsoft's Edge will become a Chromium-based browser. The main reasoning behind the MacOS release is because many web developers work in Apple's operating system, and often just skip testing for Edge as it's not available to them. The slightly less dramatic news has now gone official: Edge will be improved through open source collaboration and the core of this initiative will be adopting the Chromium open source project in the development of Microsoft Edge on the desktop.
Now that this transition has begun, Belfiore also said that Microsoft intends to become a major contributor to the Chromium open source project, and do work that will make all existing Chromium-based browsers run better on Windows 10. The rendering engine Microsoft has worked for years to flawless is getting the boot, and the company will spend the next year building a new version of Edge (the name stays) that will run on Apple's macOS as well as older versions of Windows. Once Edge shifts to a Chromium foundation, the company intends to deliver browser updates for all Windows versions "on a more frequent cadence". This makes Chromium and its Blink engine the most popular on the web due to Chrome's inherent popularity and omnipresence.
At the time of publication, there is no timeframe for when Edge will launch on Macs, and Microsoft isn't launching a beta or anything like that anytime soon.
While this move will nearly certainly make Edge more popular (to be fair, it couldn't really get any more unpopular), and widen its audience to new platforms, not everyone is happy with this move. "Ultimately, we want to make the web experience better for many different audiences", he said.
Finally they plan on being active contributors to the Chromium Project, like they have been doing with the ARM version of Chrome.
Building Edge as a Win32 program allows Microsoft to also bring it to Windows 7 and Windows 8, which opens up a vast new market for potential Edge users. All in, this is great news for anyone who struggled with Edge and the fact that websites and web apps simply didn't play well with it from the beginning. New Chromium builds roll out every few weeks. Of course, the new Edge will still tie into your Microsoft account and sync your passwords, bookmarks, and other data across devices. As far as the users are concerned, nothing really is going to change on the surface (no pun intended) and Edge will continue to operate as before, just with better compatibility.
Instead, it's about making the browser better.
Compared to the endlessly mocked Internet Explorer, Edge is a totally serviceable, relatively sleek piece of software, but the fact is that web developers simply weren't going to go out of their way to ensure that their websites would run flawlessly on the platform when almost 70% of the planet uses Chrome.