Mozilla Firefox ESR140.17.0

Open Mozilla Firefox ESR to visit websites, use online services, and handle everyday web access from a Mac computer. It provides the familiar core function of a browser: entering web addresses, reading online content, and interacting with browser-based services. The ESR designation, meaning Extended Support Release, marks it as a Firefox edition built for stability and ease of use in enterprise settings.

Organizations can deploy it for employees who need a consistent browser environment for routine work, while individual Mac users can use it for general internet activity. Firefox is available in more than 90 languages, supported by dedicated volunteers around the world, so users can work with a localized browser interface. Its language availability also helps organizations and households serving people with different language preferences.

The current version is 140.17.0 and supports macOS on both Intel and Apple Silicon hardware. Mozilla Firefox ESR is distributed under a freeware license, and the listed platform is macOS. As an extended-support browser rather than Firefox Beta, Developer Edition, or Nightly, it prioritizes a dependable experience for enterprise use over previewing unreleased features.