Are old Firefox keys, e.g., Firefox 1.0.6 needed in the Windows Registry, or should updates have deleted old keys?
I have old keys in my XP Windows Registry going back for eons. Leave them alone? Should any upgrade have deleted old ones? They appear in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Management\ARP Cache.
At least one computer magazine publisher quit acquiring, testing, evaluating and writing about registry software a number of years ago, because they could find no system improvement was evident after a registry product was run.
Other wise systems developers have said that the "perfect" registry cleaner probably doesn't exist; that's it a balancing act between being too lethal (and bringing the system down) or too lite (and a waste of time), therefore each of us must define how squeaky clean we wish to be.