We will contribute web platform enhancements to make Chromium-based browsers better on Windows devices: Even if you don't use Edge, Microsoft still wants your experience on Windows to be a positive one.
The second important part of this story is that Microsoft will also be bringing this new version of Edge to more platforms. While the engine will change, Microsoft has stated that they will continue utilizing the Microsoft Edge name and will now bring the browser to all supported Windows platforms. All Microsoft said for a timetable was "in the next year or so" and noted that Edge on Chromium would be updated more frequently and would land for macOS. As can be seen from caniuse.com, a website that shows which features are available in which browsers, there's still a lot of fragmentation and quirky browser behavior.
The goal is to help Edge play better with current Web standards and with other Chromium-based browsers, such as Google Chrome. Right now, Edge's set of browser extensions is limited, leaving users no compelling reason to switch from Chrome, which is powered by the open-source Chromium. Microsoft even took the unusual step of nagging people to use Edge in Windows.
Finally they plan on being active contributors to the Chromium Project, like they have been doing with the ARM version of Chrome. As developers will no longer have to test their websites and web apps separately for EdgeHTML, the web will also become less fragmented, allowing for easier testing and more of a consistent experience for everyone. There is also a possibility that Microsoft Edge will be launched for Mac OS X or other platforms in the future.
Some might see this as Mozilla ire against Microsoft for not choosing to use Mozilla's own Gecko Quantum rendering engine, but Mozilla makes a good point.
"This is a big step for Microsoft, for the Microsoft Edge team, and we recognize it will be a big step for the Chromium project as well", the company says.
Preview builds are "expected" to be released starting in "early 2019".
Mozilla says that Microsoft's decision could make it harder for Firefox to prosper.
"Google's dominance across search, advertising, smartphones, and data capture creates a vastly tilted playing field that works against the rest of us", he added.
"That's what happened when Microsoft had a monopoly on browsers in the early 2000s before Firefox was released".