Microsoft is testing tabs in File Explorer. The EaretTrump Windows app developers discovered the new tabs support hidden inside the latest Windows 11 test build. This feature appears to be one of the secret additions Microsoft has started testing.

Multiple folders can be opened in one window with the addition of tabs to File Explorer. Under a feature called Sets, Microsoft started testing tabs in Windows 10 apps. Microsoft canceled the project and never shipped it to Windows 10 users.

Microsoft doesn't seem to be changing its File Explorer interface as part of this support. The Windows File Explorer has existed in the operating system since Windows 95, and a variety of designers have created concepts to try and improve and modernize it in recent years.

While Microsoft has made some improvements to File Explorer in Windows 11, a developer has created a new app. The Windows store has an app called Files that supports tabs and has modern features.

We are waiting on Microsoft to officially announce the tabs for File Explorer. The company would only communicate about features that they are allowing Insiders to try out and give feedback on.