Native Window Placement arranges windows erratically
Instead of "arrang[ing] windows in overview in a more compact way", the extension has the windows at odd offsets to each other, leaving large gaps (image attached). When turned off at https://extensions.gnome.org/local, the default GNOME behaviour is sensible. My resolution is 1920 by 1080 at 100% scale, if that helps.
Edited by Arlo James Barnes