The thing is that browsers these days are constantly changing how they handle different types of cookies making it difficult to keep up with the changes that they make.
Cleaners try to keep up, but they are a moving target and the locations to be cleaned seemingly change each month as the browser updates.
In some cases even the browser itself can’t keep up with it’s own changes.
eg. I have my Firefox set to delete all cookies on exit, but since changes were made to how it stores cetrain types of cookies it is no longer removing them all, particularly some of those now stored in ‘cookie-jars’ as well as some of the newer changes to cookie management and storage…
(I catch some of the extra ones with my own cleaner batch file, CCleaner can sometimes find a few more than my own cleaner did).
PS. As a new member you won’t be able to post any images or weblinks yet, see this for why not:
Can’t post an Image or a Weblink?