Latest update causes FF to consume more and more ram until it becomes unresponsive and eventually crashes.

stopped working as of 12-12-23 after updating the extension

Не уверен, но похоже расширение майнит во время простоя именно в firefox, в chrome такого поведения не наблюдается. Благо есть Violentmonkey.

I am using this to enable a script that runs on Firefox at YouTube playlists to enable a download of the playlist items' details. It has worked flawlessly and I am well pleased.
https://greasyfork.org/en/scripts/418605-export-youtube-playlist-in-tab-delimited-text

很好用，五星好评