How to open a window (alert) in an extension?

Question

JavaScript

When calling the alert, confirm, promt windows through the extension script, the window appears under the extension icon, partially going beyond the browser window. What code will open a window in the middle of the browser window?

now it's just "alert('text')"

Answer 1

What code will open a window in the middle of the browser window?

none of the existing ones.
you need to make your own custom alert and position it in the center.