Nah, that's for settings and profile stuff. Look for something like this:
C:\Documents and Settings\*your username*\Local Settings\Application Data\Mozilla\Firefox\Profiles\... That e1u3gpz1. default will probably not be the same on your computer. All the files in that Cache folder are the temps. Once there, you can sort them by name, size, type, or modified. They won't have extensions on them, either.