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Mozilla Firefox ESR (Legacy) 115.24.0

Author: Mozilla
Date: 05/29/2025
Size: 55-129 MB
License: Open Source
Requires: 10|8|7|Linux|macOS
Downloads: 53540 times

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Mozilla Firefox ESR (Extended Support Release) is a long-term support build of Firefox, updated roughly every 42 weeks for major changes and every 4 weeks for minor changes. Portable version is also available.

In other words, Mozilla Firefox ESR is designed to be three versions behind the current official release but with the latest security updates. It's for anyone who needs to use a previous build of Firefox safely. While you can download older builds manually going back to the first Firefox, they won't have the latest security updates.

Aside from the security updates included, you'll most likely not even notice that Mozilla Firefox ESR is a few builds behind.

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Version History for Mozilla Firefox ESR (Legacy) :
https://www.mozilla.org/en-US/firefox/115.24.0/releasenotes/

Editor's Note:
Does not support Windows 7/8 or macOS 10.12-10.14. See Release notes above.

Screenshot for Mozilla Firefox ESR (Legacy)

Official Download Mirror for Mozilla Firefox ESR (Legacy)

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