Mozilla Firefox plug-ins for WinUtilities History Cleaner How to use this plug-ins? 1. Download and install our WinUtilities suite 2. Unzip the downloaded file to your WinUtilities plug-ins folder 3. Run WinUtilities History Cleaner 4. Check the ‘Erase Mozilla Firefox cookies & recent history’ option in list 5. Click Erase Now button on the bottom of main window .