pl-sort от rsapkf

pl-sort lets you sort public YouTube playlists by:

- Views
- Duration
- Like count
- Comment count
- Date published
- Video title

This add-on will add an icon on your toolbar and an option on your context menu (when you right-click a YouTube playlist link) that redirects you to a custom link to pl-sort so you can sort a playlist by applying desired configuration.

Source