[simonw]

That would be useful. They do link to these interactive examples - looks like the default styles for popovers are not very exciting: https://mdn.github.io/dom-examples/popover-api/

[1231232131231]

Default styles only make things harder to customize. If we didn't have so many useless/ugly default styles, we wouldn't need reset.css/normalize.css

[slmjkdbtl]

How would you prefer it? I think the default styles (on chrome) are just enough, looks consistent with the rest of the default HTML styles.