Notifications Location Camera Microphone Camera + Microphone Screen Share MIDI Bluetooth USB Serial Encrypted Media (EME) Persistent Storage Quota Management Protocol Handler WebAuthn Attestation NFC <keygen>

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Fullscreen Pointer Lock

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Copy Auto Download Popup Popup (delayed 5 seconds)

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Async Clipboard API

Read text Write text
Read text (delayed) Write text (delayed)

Notes:

NFC	Android only - Implemented behind the experimental flag chrome://flags/#enable-webnfc.
Serial	Implemented behind the experimental flag chrome://flags/#enable-experimental-web-platform-features.
Encrypted Media (EME)	May succeed without permission depending on the implementation. Attempts to use known key systems. (See the source for the list of supported key systems.)
Async Clipboard	These buttons test the new Async Clipboard API. Note that these tests are different from the "Copy" button on this page, which uses the old (synchronous) execCommand method to write to the clipboard. This feature is implemented behind the experimental flag chrome://flags/#enable-experimental-web-platform-features. To enable the Content Settings UX for setting clipboard permission, you'll also need to enable chrome://flags/#clipboard-content-setting Note: Only available for secure connections (https).
WebAuthn Attestation	After pressing the button, you may need to touch your security key before you can see an attestation prompt.