Microsoft's new Edge browser will discard two of the oldest browser technologies found in the aged Internet Explorer and replace them with add-ons based on HTML5 and JavaScript.

That's why the new Edge browser in Windows 10 doesn't support any of the old extensibility options from IE – that means ActiveX controls, Browser Helper Objects, VBScript, or toolbars.

Many old technologies and APIs, including ActiveX controls, will no longer be supported by Microsoft's new Edge browser. Edge will replace Internet Explorer as the default browser in Windows 10.