Open new window on the laptop?

How to open a page in the new window on the laptop

You mean in the web browser? Usually using the key combination Ctrl + N

On the plus next to the first tab (tab) in the browser

Yes, but open an already opened page again like a copy

By copying the URL and pasting it into the new window?

But there's also a key combination that is much faster

If you know that, use it and don't ask here in general…

Incidentally, this key combination would not be the same in every browser. I personally do not know of any of them

Try the key combination: Shift + Enter