When you’re going down the path of a few simple things like browsing the web, it’s a lot more fun to do it the way you’d do it in a normal browser.
To get a window, you need to know enough about the underlying system of how window is made that it will run in the background and not harm the program that is running it. In other words, window systems are inherently unsafe. The same goes for window managers, which is why there is no simple way to make a webpage behave like a window.
This is just how the world works. We’re supposed to stay in the present. We’re supposed to keep moving forward, not backward. We’re supposed to make sure that it works.