Want to protect your privacy from super-cookies?

 

They are also called LSO’s and you can find a Firefox extension and description of what they are here.

LSO’s threaten your privacy because they never expire.
However, as every cookie they can contain data that you consider as useful. For example stored Flash game settings or personal data for automatic logins. If you decide to delete a LSO make sure not to loose important data. See FAQ on how to exclude certain LSO’s from deletion.