Run a lightweight Linux VM (or Docker container) with yt-dlp . Access it via a local web interface (e.g., youtube-dl-webui ). Your Firefox plugin simply sends the playlist URL to the VM. The VM handles the YouTube changes, not your plugin.

Tools like yt-dlp offer the highest success rate, though they require technical proficiency. To give you a precise fix, I need to know:

The fix for a broken YouTube playlist downloader on Firefox depends on whether you are using a browser-only extension native-messaging hybrid

, and look for your extension's icon to drag it back onto the bar. 2. Resolving High-Resolution & Playlist Issues

If your current plugin is permanently broken, these extensions are currently maintained and highly rated for Firefox users: