Improve alert, prompt and confirm dialogs style
Alert dialog is missing top rounded borders. Also, it might be better to make title not so prominent, as most important part is the alert message. And for some reason alert dialog backdrop is covering top of DevTools panel.
Same issue with confirm dialog. Prompt dialog has additional issue of missing padding between input field and dialog window borders.
GNOME Web (Epiphany) 3.38.3 on Fedora 33.