MV3 migration extension, MV3keepalive, is designed to assist extension developers facing challenges with the new Manifest V3 limitations. This tool ensures the continuous operation of any extension's service worker by keeping it active through requests. Service workers typically terminate after 15 seconds of inactivity, or at best, after 5 minutes without any event listeners being triggered.

This extension proves beneficial when the persistent operation of an MV3 extension becomes impractical due to implementation or performance concerns. To utilize MV3keepalive effectively, users are encouraged to install the extension and make the necessary modifications to their service worker and manifest.json files, detailed in the project's GitHub repository.