Microsoft announces support for developing third party extensions for the Edge Sidebar - Neowin

The new support will allow developers to make Edge Sidebar extensions for Microsoft's web browser so they can offer various new functions to users of Edge, similar to the Bing Sidebar.

Microsoft Edge – Sidebar

New Microsoft Edge Sidebar Extensions Tips HTMD Blog

New Microsoft Edge Sidebar Extensions Tips HTMD Blog

Windows 8 - Wikipedia

What are the benefits of using Bing Chat on Microsoft Edge compared to other browsers? - Quora

Edge may soon save screenshots of every page you visit - gHacks Tech News

Microsoft Edge1 - Wikipedia, PDF, Internet Explorer

Microsoft Edge force-installs Google Docs Offline extension without permission - Neowin

How to Customize the New Sidebar in Microsoft Edge

The new Edge will seemingly import tabs set aside from the legacy version as favorites - Neowin

Microsoft outlines the new features that are coming to Edge in the Creators Update - Neowin