This shows details of the URL's entry in the browser cache both before and after the request was completed. The following data items are displayed:

URL in cache?

This indicates whether the currently selected item has an entry in the browser cache.

Expires

The date/time when the cache entry will expire. The web server can specify this using the Expires header.

Last Modification

This is the modification date returned by the server in the Last-Modified header when the cache item was stored or updated.

Last Cache Update

This is the date/time when this cache entry was last updated.

Last Access

This is the date/time when the content was last read from the cache

ETag

An ETag is an opaque string that is used to uniquely identity an entity on a server. It provides a finer level of control than Last-Modified and is used by the browser in If-None-Match request headers.

Hit Count

The number of times that the browser has read content from this cache entry.