Treat cookies as “sameSite=lax” by default if no “sameSite” attribute is specified. Developers must opt-in to the current status quo of unrestricted use by explicitly asserting “sameSite=none”.
若未指定 Cookie 的“sameSite”属性，则将其默认视为“sameSite=lax”。开发者须明确声明“sameSite=none”，以适应当前滥用的现状。