When an action is performed, such as "Quick Save" or "Copy URL of Current Tab", a pop-up notification shows up at the centre of the screen, and it's aggressive.
It doesn't have an "x" to close with a click, you can't swipe it away, and pressing Escape on a keyboard also doesn't close it. You just have to wait for it to disappear.
I tried to find a setting to change it's position, thinking that it wouldn't be that much of a hassle if it was top right, or even better, if it was a native macOS notification.