You can block websites on a Microsoft Edge browser using Command Prompt, as there is no built-in feature for it in the browser.

To allow websites to show pop-up windows in Microsoft Edge, you have to disable the browser's pop-up blocker. Here's how you do that on desktop and mobile. Why Disable the Pop-Up Blocker in Edge?

To block a website on Windows 10, head to Microsoft's Family Safety site and log in with your adult Microsoft account.