I think you're confusing some stuff. A native dialog element as a popup is easier to block, for example, you just have to select all dialog elements by tag name

I think you're confusing some stuff. A native dialog element as a popup is easier to block, for example, you just have to select all dialog elements by tag name and convert them to div inlined elements or something like that. Can't do the same reliably when the dialog is created by a javascript library using a div that uses a random id or generated class name