Clacks Overhead Broadcaster is a Chrome extension that adds a unique touch to web requests by including the X-Clacks-Overhead header. This header serves as a tribute to the late Sir Terry Pratchett, allowing users to remember those who have passed. The extension operates by appending a harmless message to all HTTP requests, ensuring that the legacy of individuals is acknowledged across the web. It is a simple yet meaningful way to keep memories alive in the digital space.

The X-Clacks-Overhead header, inspired by the Discworld series, particularly the novel 'Going Postal,' carries the default message 'GNU Terry Pratchett.' This message is designed to be transmitted through the Clacks network, symbolizing that as long as the message is sent, those remembered are never truly gone. This extension is free to use, making it an accessible tool for fans of Pratchett's work and those wishing to honor the memories of loved ones.