Violentmonkey is a robust userscript manager designed for Firefox and other browsers with WebExtensions support. It allows users to run scripts that enhance web pages and add functionality, supporting most scripts from popular platforms like Greasemonkey and Tampermonkey. Key features include automatic updates based on metadata, script execution in a specified order, and compatibility with GM functions, making it a versatile tool for web development enthusiasts.

In addition to its core functionalities, Violentmonkey offers convenient import and export options via zip files, facilitating easy script management. Users can also sync their scripts with cloud services like Dropbox and OneDrive for seamless access across devices. The program is open-source and frequently updated, providing users with a reliable and evolving tool for enhancing their web browsing experience.