Mozilla Firefox ESR (ach)

Mozilla Firefox ESR (ach) 153.4.0

Get the Firefox Extended Support Release or Rapid Release browser for comprehensive data security and data protection.

  • By Mozilla
  • Open Source
  • Updated Sep 29, 2026
Download for Windows

About Mozilla Firefox ESR (ach)

Get the Firefox Extended Support Release or Rapid Release browser for comprehensive data security and data protection.

What's new in 153.4.0

Version 153.4.0, first offered to ESR channel users on September 29, 2026
Firefox 153 Extended Support Release (ESR) includes all of the enhancements since Firefox 140, along with many new features to make your enterprise deployments easier and even more flexible.

Fixed

  • Various security fixes.

Developer

  • Reference link to ESR 153.0 release notes.

Full release notes »

Technical details

PublisherMozilla
AuthorMozilla Foundation
Version153.4.0
Release date2026-09-29
LicenseMPL-2.0
Installer typenullsoft
Architecturex86, x64, arm64
Package IDMozilla.Firefox.ESR.ach

Links & install command

Install Mozilla Firefox ESR (ach) from the command line with Windows Package Manager (winget):

winget install --id=Mozilla.Firefox.ESR.ach -e

browsercross-platformfossgeckoquantumspidermonkeywebweb-browser

Older versions

  • 153.3.0
  • 153.2.0
  • 153.1.0
  • 153.0.0
  • 140.14.0
  • 140.13.0
  • 140.12.0
  • 140.11.0
  • 140.10.2

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