Youtube Playlist Manager 作者： Software

Youtube music organizer.
Just create a new playlist and start adding the URLs to the songs you want to listen to.
Once you hit play, the add-on will open a new tab containing a playlist with all your songs.
The user can choose between Youtube or Invidious for opening playlists.
No need for further action such as logging in.

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Source code: https://notabug.org/ElectricTree/Youtube-Playlist-Mozilla-Addon

Donations (monero xmr):
86sFQJPSWefaRNbFV5TYo22jvc3aoF99mSSW8mVShKbh7tZGDB7QYhZhULuTULDYE74dAkdJywfpUUSZhjqUYt5WEkKzY21