The underlying reason behind the cookie's change. If a cookie was inserted, or removed via an explicit call to cookies.remove, "cause" will be "explicit". If a cookie was automatically removed due to expiry, "cause" will be "expired". If a cookie was removed due to being overwritten with an already-expired expiration date, "cause" will be set to "expired_overwrite". If a cookie was automatically removed due to garbage collection, "cause" will be "evicted". If a cookie was automatically removed due to a "set" call that overwrote it, "cause" will be "overwrite". Plan your response accordingly.
Type
Values of this type are strings. Possible values are: "evicted", "expired", "explicit", "expired_overwrite", "overwrite".
Browser compatibility
This API is based on Chromium's chrome.cookies API. This documentation is derived from cookies.json in the Chromium code.
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