http://www.techradar.com/news/microsoft-defends-edge-and-looks-to-make-a-better-browser

Microsoft is looking to improve Windows 10’s dedicated browser by speeding up development on Edge with an Insider testing program, and the firm has also been defending its policy on extensions.

Much like the testing programs which are already in place for Windows 10 itself, Microsoft Office and the Bing search engine (the latter was launched last year), apparently Microsoft is readying an Edge Insider program, at least according to an email sent to Bing testers.