Dr.Web anti-virus link checker - a Firefox extension for safer downloading
review from ClifNotes, Dec 2006, permalink _ Security Tools
Under review
Quote from the website
This plugin allows you to check any file you are about to download, any page you are about to visit with online version of Dr.Web anti-virus! A new menu item "Scan with Dr.Web" will appear on hyperlink context menu.
https://addons.mozilla.org/firefox/938/