Before I delete 'site cookies' I would want to see a list of all cookies I have o the computer and then decide which to delete.

Doesn't work. Still logged in to sites after removing cookies. Add-on I had for previous version of FF worked fine.

good , but i would like to erase cookies when i close every site window on browser

Click one button to erase all cookies for the current web site you are on. It's that simple!