The backdrop policy overrides set on the window.
OptionalbehaviorPopups only: the behavior overrides set on the popup.
The window rectangle.
Features the window supports.
Whether this is the main window.
OptionalprofilePopups only: the behavior preset; legacy when the popup was created without one.
The backdrop policy in effect.
OptionalresolvedPopups only: the behavior in effect.
Diagnostic snapshot of the window shell (lifecycle and startup state); its shape can change between versions.
Window title.
OptionalurlPopups only: initial URL specified when the popup was created.
main or the popup id.
One window of
window.getAllWindows. The popup-only fields are absent for the main window.