Hello.
First: CCleaner is a perfect tool to temove temporary and old files. I like it very much.
I'm using the CCleaner v1.26.218 and Mozilla Firefox v1.5. In the Firefox Version 1.5 the Cache is saved under C:\Dokumente und Einstellungen\USERNAME\Lokale Einstellungen\Anwendungsdaten\Mozilla\Firefox\Profiles (in German), but this Directory is not clear, after the CCleaner was running.
Kind Regards,
Cruzer83