Oh, it seems like we're implementing this property on the wrong interface.
Comment on attachment 8678531 [details] [diff] [review] Move WindowClient.frameType to Client.frameType r=me
Attachment #8678531 - Flags: review?(bzbarsky) → review+
Our documentation already has this hanging off the correct interface: https://developer.mozilla.org/en-US/docs/Web/API/Client/frameType So I think we're all good for docs.
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