ttpCookie - Download here
Firefox toolbar-button
On first start ttpCookie is deactivated:   Click on the toolbar-button to get ttpCookie running:
Notifiers
ttpCookie has four notifier-icons that inform you about whats happening (to see this more detailed open the Log window). Each of them starts blinking when one of the following events occurs:

An unknown third party is detected and added to the list of known third parties.
You will find this third party in the TP-Editor and may choose to move it on whitelist or blacklist.
A cooke is sent to a third partiy that you've added to your whitelist.
These cookies will never be manipulated or blocked by ttpCookie.
A cooke was designated for sending to a third partiy that you've added to your blacklist.
These cookies are always blocked by ttpCookie.
A cooke has been used too many times or is too old to be resent and therefore blocked.
You can change the according values in the Settings dialog.
ttpCookie context-menu
This menu can also be accessed via Tools → ttpCookie
← Switch ttpCookie on/off (same as clicking the toolbar-button)
← Show the list of fully trusted third parties
← Show the list of completely blocked third parties
← Enable/disable the Log window with detailed messages
← Open TP-Editor to exchange entries between whitelist, blacklist and list of known third parties
← Open the Settings dialog (also available via Tools → Add-ons → ttpCookie → Options)
← Show this help site
← Display a message box with information about authors and contributors to this project
Log window
The image shows the Log window containing explaining examples of each message type.

TP-Editor
The image shows the TP-Editor with whitelist, list of known third parties and blacklist.

To modifiy the list click on one of the items and move it to another list by pressing one of the move buttons. If you don't want to save your changes click on "Cancel" or just close the window.

Settings dialog
The image shows the Settings dialog with the (hopefully self-explaining) available settings.