Average storage is 5MB per domain, which equals about 5,000,000
characters
Thanks to those 5MB, you can store hundreds of songs
If storage is full, you won’t be able to add more playlists/songs
Actions that could lead to the deletion of the data stored in LS
Clearing browsing data (cookies, history, cache)
Manually deleting from the developer tools
Uninstalling/Reinstalling the browser
Restoring the device
Switching to another browser
Signing out of a synchronized browser
Some browser updates
I recommend making a backup of your playlists by obtaining a JSON
object that will contain both the playlist name and its respective
songs, with the URLs for each song.
I recommend saving that JSON in
Google Keep, which is free.