Popular web browsers such as Netscape Navigator and Internet Explorer tend to hide the details of HTTP transactions from the user. What this means is that it is very difficult for users to see the communication between the web browser and web server. The only way to see this communication is to use a network packet sniffer, which may not be convenient or possible. Not being able to view HTTP transactions can be frustrating for web developers that can use such information to debug their web applications. Filters have access to all details of HTTP transactions and can therefore be used to provide access to this information.