FileClean can clean the dat files, located in the Temporary Internet and Cookie folders.
This new version will clean the files in Internet Explorer, FireFox, Chrome and should work with Netscape Navigator (as Netscape installs its file in the same folder as Internet Explorer if you are using Microsoft Windows) I have not tested the software on a system with only Netscape Navigator installed. If you have a system with only Netscape Navigator, please let me know how the software works.

There are safe guards in place to keep you from deleting a system folder, but please make sure you know what folders you want to clean, as the cleaning process cannot be reversed. If you have any questions read the help file included with the program.

If you are connected to the internet when FileClean starts it will automatically check for updates to the program.

The license of this software is Free Trial Software, the price is $12.95, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of FileClean, you can buy this disk cleanup software software.