Download Virus Checker is a Firefox extension designed to bolster your online safety by scanning download links for potential threats. Utilizing the VirusTotal web service, it checks links against 68 different antivirus solutions with no configuration required. When a download is initiated, the extension automatically sends the link to VirusTotal, providing a thorough check for malware and viruses. Users are alerted if the link poses a risk, enabling informed decisions on whether to proceed with the download.

This subscription-based tool is particularly useful for users seeking additional layers of security while browsing. It evaluates the responses from VirusTotal and presents warnings if multiple antivirus engines flag a download. With the capability to handle files up to 128 MB and scan URLs, Download Virus Checker offers a robust solution for those wanting to enhance their protection against online threats.