Mireth Technology’s NetShred X has been updated to version 3.5. The software automatically writes over and destroys your Web browser’s cache, history and download cache, as well as your e-mail trash and other potentially sensitive files. The new version adds support for Firefox and Camino Web browsers and also shreds the contents of Safari’s icons folder, which contains cached items. NetShred X 3.5 is US$19.95, but this is a free upgrade for existing users. A demo that deletes files, instead of overwriting them, is available for download from the Mireth Web site. System requirements call for a G3 or better processor and Mac OS X v10.1 or higher. Mireth notes that NetShred X doesn’t work with Outlook Express or Entourage, due to Microsoft’s use of proprietary file formats with both applications.