Edge has Start menu pinning built in, but that doesn't mean you can't do the same thing from Chrome or Firefox.

Learn how to pin Portable app shortcuts to the Start Menu in Windows 11/10. You can pin any portable app to the Start Menu to open them directly.

Chrome, Edge, and Firefox have a feature that lets you pin the shortcuts to your favorite websites easily to your Windows Taskbar or Start Menu. Whether you are using Windows 11, Windows 10, or ...

It disappears from your desktop and transfers to the Start menu. Right-click the Firefox icon and click "Pin to Start Menu" to pin the icon at the top of the Start menu.