Where are cookies stored?

When using the 'maxage' parameter in a Set-Cookie header the result depends, unfortunately, on the browser..

 

 

From memory - IE doesn't store them to a file and treats them as a session cookie with an explicit expiry time, while Firefox does write them to a file.

 

 

The RFC leaves it rather up to the reader to decide how to handle them, so it's anyones guess as to how other browsers (and, indeed, future versions of the same browser) will handle it.