EcoIndex.fr is a Firefox extension designed for web developers and IT professionals focused on enhancing website performance. This tool allows users to quickly view existing performance results for any given webpage by accessing the EcoIndex database with just a click. If results are available for the visited site, they will be displayed directly, offering immediate insights into the site's efficiency and environmental impact.

The extension is subscription-based, making it an ideal choice for those who require ongoing access to performance data. EcoIndex.fr aims to foster better web development practices by providing essential analytics that help developers optimize their sites for speed and sustainability, ultimately contributing to a greener internet.