SecurityHeaders.io Analyser is a Firefox extension designed for web developers and IT professionals who want to assess the security headers of their web pages. This tool fetches security scores from the SecurityHeaders.io platform, enabling users to quickly gauge the security status of a page through a simple interface. The score is prominently displayed on the extension icon, providing immediate feedback on the page's security posture.

In addition to displaying the score, users can click on the icon to access a comprehensive security report on the SecurityHeaders.io website. This feature allows for deeper analysis and understanding of the security measures in place, making it an essential tool for anyone involved in web development or IT security. The subscription-based model ensures users have access to the latest updates and features.