ESET NOD32 Antivirus contains the Web browsers feature, which allows the user to define whether the given application is a browser or not. If an application is marked as a browser by the user, all communication from this application is monitored regardless of the port numbers involved in the communication.
The Web browsers feature complements the HTTP checking feature, as HTTP checking only takes place on predefined ports. However, many Internet services utilize dynamically changing or unknown port numbers. To account for this, the Web browser feature can establish control of port communications regardless of the connection parameters.
The list of applications marked as browsers is accessible directly from the HTTP checking setup screen (as seen above) under the Web browsers option. This section also contains the submenu Active mode defining the checking mode for Internet browsers. The Active mode is useful because it examines transferred data as a whole. If it is not enabled, communication of applications is monitored gradually in batches. This decreases the effectiveness of the data verification process, but it also provides higher compatibility for the listed applications. If no problems occur while using it, we recommended that you enable the active checking mode.