Microsoft, in December 2018, announced their decision to adopt the Chromium open source project in the development of Microsoft Edge on the desktop to create better web compatibility for our customers, and less fragmentation of the web for all web developers.
Microsoft began making contributions back to Chromium in areas like accessibility, touch, ARM64 and others. Their plan is to continue working working directly with the teams at Google and in Chromium rather than creating a parallel project. Both Microsoft and Google engineers have been working together to improve the underlying Chromium project so that Chrome and Edge run better on Windows. Microsoft has had around 150 commits accepted into Chromium, paving the way for improvements to Edge and Chromium on Windows 10. That includes improving accessibility, smooth scrolling support, Windows Hello integration, and things like ensuring the touch keyboard shows up reliably.