SEE: 10 ways to prevent developer burnout (free PDF) (TechRepublic) Microsoft says the new extension simplifies developers' workflow by changing the way users can launch an instance of Edge to debug.

Auto attach the Microsoft Edge Tools when you start debugging with the Debugger for Microsoft Edge extension. "The DevTools will connect to an instance of Microsoft Edge giving you the ability to see ...

Like earlier versions of the now legacy Edge, Microsoft’s new browser keeps the familiar F12 shortcut to launch its developer tools, either attached to the browser or in a separate pane.

The F12 keyboard shortcut takes Microsoft Edge users to the Developer Tools page. If you want to disable this shortcut, read this post.