Mozilla Firefox ESR - MDEF

Mozilla Firefox ESR - MDEF is the Extended Support Release of Mozilla’s open-source Firefox web browser, tailored for enterprises and other managed environments. It offers a stable, predictable release cycle with regular security and stability updates while minimizing disruptive feature changes between major versions. Firefox ESR supports centralized configuration and policy enforcement (Group Policy on Windows and cross-platform policies.json), enterprise deployment via MSI/PKG, and broad compatibility with web standards and essential extensions. Built-in protections include Enhanced Tracking Protection, site isolation, sandboxing, and frequent security patches. Available for Windows, macOS, and Linux, it enables IT teams to standardize, test, and roll out browser updates on their schedule, reducing support overhead and change risk across fleets in business, education, and government settings.

Mozilla Firefox ESR - MDEF is developed by Mozilla. The most popular version of this product among our users is unknown.

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