To ensure a secure and authentic installation, always use official Mozilla sources. You can access the primary Firefox Enterprise download page to select specific installers. Download Firefox ESR
Choosing the ESR version provides several technical advantages for specific use cases: Use Firefox as your enterprise browser
The is an official version of the Firefox browser designed specifically for organizations, educational institutions, and users who prioritize stability over the latest features. Unlike the standard "Rapid Release" version that updates every four weeks, Firefox ESR follows a much slower release cycle, making it ideal for managed environments. Where to Find the Official Firefox ESR Download Page