Very handy. Just gotta watch which cookies it's deleting... if you find yourself having to log into a site when you close the tab & return to that said site, your deletion prefs won't stay saved or anything like that, check the deletion logs to make sure the cookies aren't being deleted by this extension. Easy to white list any important cookies... & if you get lost, they provide instructions for the asking. :) This is cross-browser, so it can be used on other browsers too. :) Just awesome... :D