Why you probably shouldn't use cookies to store session data - wonko.comBrowser cookies have a very specific purpose: they are meant to store tiny bits of data and to pass that data to the web server on every request. Because they must be uploaded to the server along with every single request the browser makes, browsers limit cookies to a maximum size of 4 kilobytes per domain. Given this storage limitation and the fact that even a 4KB cookie is absolutely guaranteed
