Update YouTube sorting playlists by play time length.user.js

Change display symbol.

Change display symbol.

Fix for Firefox that performance is too good

The page loading performance is too good. It cannot wait for loaded before reading dynamic objects.

Update YouTube sorting playlists by play time length.user.js

Fix first time not check list.

Change onload to eventlistener.

Change onload to eventlistener because it will overwrite other script.

Update YouTube sorting playlists by play time length.user.js

Fix observer name to other.

1. If Youtube hide data is old then auto refresh when clicking custom button.