Hi abaBAAnNaira ,
The cookie “buttonizer-first-visit” is saved when the setting Timeout is used.
Its purpose is to get the current time when the user arrives on the site.
The timeout function will then check the first visit time of the customer and check if it should do the timeout animation.
"buttonizer-first-visit=;expires=Thu, 01 Jan 1970 00:00:01 GMT;" is a way to delete the cookie.
The cookie is only saved until the user leaves the site.
Please let me know if you need to know more!