Readonlyplatform'macOS', 'Windows', … (UA client hints, else navigator.platform).
ReadonlygpuWebGL unmasked renderer, e.g. ANGLE (Apple, ANGLE Metal Renderer: Apple M4 Max, …).
ReadonlywidthScreen size in CSS px and the device pixel ratio (current screen).
ReadonlyheightReadonlydprReadonlylabelScreenDetailed.label / isInternal — only with the permission.
Readonlyis
What the page can observe about the display the window is on.