Most Websites Receive ‘F’ Grade in Mozilla’s Comprehensive Security Review

By Marcos Colon

A recent analysis by Mozilla on the Alexa top one million websites points to a majority of the sites lacking the adequate defensive security technology.

Most of the websites analyzed as part of Mozilla’s comprehensive security review earned an “F” letter grade, according to a Mozilla Security blog post.

By leveraging its Observatory tool, the Mozilla Foundation was able to scan the top one million sites to come to its conclusions as it relates to the security posture of the sites. While more than 93% of sites received an “F” grade, only 0.013% obtained the coveted “A+” grade.

The grades are based on 13 security-related features  which are intended to protect against threats associated with XSS vulnerabilities, man-in-the-middle attacks, and cookie hijacking, according to a report by Threat Post.

Since the Observatory tool was launched in 2016, grades have improved as websites continue to bolster their defensive posture.

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