Security Plus

Security Plus is a browser extension that provides free checking of urls for viruses. It uses up to 64 different antivirus products and scan engines to check for viruses that the user's own antivirus solution may have missed, or to verify against any false positives.

How does it work?
After installation, a new item will be appended to your context-menu whenever a link is selected. By clicking on the item, a bar appears in the page to inform you about the progress of submission of the link to the VirusTotal service. After a while you will get informed about the results of the virus scanning.