Thank you Andavari. I'm aware of the "cookies to keep" function. I was just hoping for an easy way to permanently block those cookies from the "cookies to be deleted" column. In other words, by clicking on the cookie and having an "add to blocked cookies list" option which, I suspect, would need to communicate such instruction to the browser (in my case, Firefox). I was fairly sure this didn't exist in CCleaner but it would certainly be helpful!