Feature	Type of permission request	Time of request	Persistence of permission	Visibility of permission	Control on permission	Embeddability	Permission denied signalling	Remarks
Geolocation	Prompt	At usage time	Session by default, optionally permanent	Chrome indicator	Via indicator	Always allowed, bound to origin of document calling script	Error callback with PERMISSION_DENIED code	(getCurrentPosition and watchPosition handled identically)
Direct camera access (getUserMedia)	Prompt	At usage time	Session by default, optionally permanent	Chrome indicator, pulsing reminder	Via indicator	Always allowed, bound to origin of document calling script	Error callback with PermissionDeniedError object	Can be combined with mike access. Also grants access to information about other available cameras
Direct mike access (getUserMedia)	Prompt	At usage time	Session by default, optionally permanent	Chrome indicator	Via indicator	Always allowed, bound to origin of document calling script	Error callback with PermissionDeniedError object	Can be combined with camera access. Also grants access to information about other available microphones
Get stuff from camera / mike (HTML Media Capture)	Implict via user interaction	At usage time	One-off	N/A	N/A	Always allowed	No file object available
Notification	Prompt	Upfront	Persistent	None (?)	?	Allowed	Notification.permission = "denied"
Pop Up	Denied by default, Opt-in required	At usage time	One-off, optionally persistent	Chrome indicator	Via indicator	Allowed	window.open == null
Fullscreen	Ask for forgiveness after “engagement gesture”	At usage time	One-off	Transient overlay	Through instructions	Allowed only with specific permission from parent (allowfullscreen attribute)	watch el.fullscreenenabled; fullscreenerror event if previously rejected
Pointer Lock	Ask for forgiveness after “engagement gesture”	At usage time	One-off	Transient overlay	Through instructions	Allowed	document.pointerLockElement == null ; pointerlockchange event
File picker	Implicit via user interaction	At usage time	One-off	N/A	N/A	Allowed	No file object
Quota	Prompt	Upfront	Persistent	?	Convoluted	Allowed	Success (!) callback with StorageInfo.quota unchanged