: Sometimes an extension process hangs. Go to the Firefox Add-ons menu and toggle the extension off and then back on.
This extensive guide will explain why YouTube playlist downloader plugins break in Firefox, the specific errors you are encountering, and step-by-step solutions to revive them—without switching to Chrome. youtube playlist downloader firefox plugin fix
Firefox's modern extension system is designed with security and privacy in mind. However, this can make the browser's built-in video downloader plugins less powerful than some native apps. It puts sandboxed walls around what a simple browser extension can see, especially deep within the browser's media pipeline. : Sometimes an extension process hangs