VirusTotal browser plugins(Firefox)/extension(Chrome) I just had a good read about VirusTotal's extension/plugins at:
Useful tools for online virus checkers - The H Security: News and Features
,in addition to the VirusTotal Uploader there are also alternatives mentioned in the link. I'd say it's a good add-on for your browser for security.
Some additional info/read here:
here
here
here
here
Cheers:)