If you "have tested it on your PC", you would see that the flaw I have reported is factual, whether CCleaner works very well (otherwise) or not. The CCleaner webpage CLAIMS it cleans (removes) the autocomplete forms history, but it does NOT. The address bar "suggestions" are History (not "chronic"), Bookmarks, and Open Tabs. After I've cleared history (with firefox or ccleaner), hundreds, perhaps thousands, of "suggestions" that are NOT bookmarks, nor open tabs, remain. I can delete these individually, with the "DELETE" key, so they can be deleted, but ccleaner is not doing so. They must be stored somewhere, and that somewhere SHOULD be cleaned, but it is not!!!
Furthermore, and once again, unchecking the three options (history, bookmarks, and open tabs) may remove the annoyance of unwanted "auto complete", but it doesn't solve the privacy issue, of deleting websites that I may (or may not) have visited in the past.