A website can only control popups it opened I think, not the main window for example. It actually may be useful in some contexts, but should probably be throttl

A website can only control popups it opened I think, not the main window for example. It actually may be useful in some contexts, but should probably be throttled by the browser, like not more than 1 changes every 5 sec, because it can be also used in a very annoying way. As usual anyway.