Countdown Jumpscare Timer is a Chrome extension designed to enhance the viewing experience of YouTube videos by alerting users to jumpscares. This tool allows users to set specific timestamps for jumpscares, displaying a 10-second countdown before the event occurs. It is particularly useful for viewers who may be sensitive to sudden scares or simply wish to prepare themselves for intense moments in horror content.

This extension is free to use and falls under the category of add-ons and tools for browsers. Users should note that after adding the extension, refreshing the webpage may be necessary for the tool to function properly. The Countdown Jumpscare Timer aims to improve user comfort while watching thrilling videos, making it a valuable addition for fans of the genre.