I've noticed that a lot of my fellow MediaWiki devs using OS X or Linux don't have much experience with Windows 10's new 'Edge' browser, so I wrote up some notes about testing with it and what to expect regarding versioning and bug reporting:

https://www.mediawiki.org/wiki/Microsoft_Edge_browser_testing_notes

In particular, note that although versioning of the browser engine is tied to the Windows 10 operating system, the OS is updated much more aggressively than older versions of Windows.

The 'Windows Insider' preview release program also gives a chance to check new engine features for bugs, or confirm that a reported bug has been fixed correctly, before major OS updates go out. Not as good as the nightly browser builds we get from Mozilla and Google, but it's a big improvement from IE days. :)

-- brion