---
title: Firefox
addedAt: 2021-09-11
category: app
tags: mozilla web-browser
iconSlug: firefoxbrowser
permalink: /firefox
versionCommand: firefox --version
releasePolicyLink: https://www.firefox.com/
changelogTemplate: https://www.firefox.com/firefox/__LATEST__/releasenotes/
LTSLabel: "<abbr title='Extended Support Release'>ESR</abbr>"

identifiers:
  - repology: firefox
  - purl: pkg:apk/alpine/firefox
  - purl: pkg:deb/debian/firefox-esr
  - purl: pkg:generic/firefox
  - cpe: cpe:2.3:a:mozilla:firefox

auto:
  # It takes too much time to fetch all versions.
  # See https://github.com/endoflife-date/release-data/blob/main/src/firefox.py for details
  cumulative: true
  methods:
    - firefox: https://www.mozilla.org/en-US/firefox/releases/

# For non-LTS versions, eol(x) = releaseDate(x+1)
# For LTS version, eol(x) = releaseDate of the next major after the corresponding version last minor LTS on https://whattrainisitnow.com/calendar/, if available.
# The next ESR / LTS is not yet planned.
releases:
  - releaseCycle: "158"
    releaseDate: 2026-10-13
    eol: 2026-10-27
    latest: "158.0.1"
    latestReleaseDate: 2026-10-20

  - releaseCycle: "157"
    releaseDate: 2026-09-29
    eol: 2026-10-13
    latest: "157.0.1"
    latestReleaseDate: 2026-10-06

  - releaseCycle: "156"
    releaseDate: 2026-09-15
    eol: 2026-09-29
    latest: "156.0.1"
    latestReleaseDate: 2026-09-22

  - releaseCycle: "155"
    releaseDate: 2026-09-01
    eol: 2026-09-15
    latest: "155.0.1"
    latestReleaseDate: 2026-09-04

  - releaseCycle: "154"
    releaseDate: 2026-08-18
    eol: 2026-09-01
    latest: "154.0.1"
    latestReleaseDate: 2026-08-25

  - releaseCycle: "153"
    lts: true
    releaseDate: 2026-07-21
    eol: false
    latest: "153.5.1"
    latestReleaseDate: 2026-10-20

  - releaseCycle: "152"
    releaseDate: 2026-06-16
    eol: 2026-07-21
    latest: "152.0.6"
    latestReleaseDate: 2026-07-14

  - releaseCycle: "151"
    releaseDate: 2026-05-18
    eol: 2026-06-16
    latest: "151.0.4"
    latestReleaseDate: 2026-06-09

  - releaseCycle: "150"
    releaseDate: 2026-04-21
    eol: 2026-05-18
    latest: "150.0.3"
    latestReleaseDate: 2026-05-12

  - releaseCycle: "149"
    releaseDate: 2026-03-24
    eol: 2026-04-21
    latest: "149.0.2"
    latestReleaseDate: 2026-04-07

  - releaseCycle: "148"
    releaseDate: 2026-02-24
    eol: 2026-03-24
    latest: "148.0.2"
    latestReleaseDate: 2026-03-10

  - releaseCycle: "147"
    releaseDate: 2026-01-13
    eol: 2026-02-24
    latest: "147.0.4"
    latestReleaseDate: 2026-02-16

  - releaseCycle: "146"
    releaseDate: 2025-12-09
    eol: 2026-01-13
    latest: "146.0.1"
    latestReleaseDate: 2025-12-18

  - releaseCycle: "145"
    releaseDate: 2025-11-11
    eol: 2025-12-09
    latest: "145.0.2"
    latestReleaseDate: 2025-11-25

  - releaseCycle: "144"
    releaseDate: 2025-10-14
    eol: 2025-11-11
    latest: "144.0.2"
    latestReleaseDate: 2025-10-28

  - releaseCycle: "143"
    releaseDate: 2025-09-16
    eol: 2025-10-14
    latest: "143.0.4"
    latestReleaseDate: 2025-10-03

  - releaseCycle: "142"
    releaseDate: 2025-08-19
    eol: 2025-09-16
    latest: "142.0.1"
    latestReleaseDate: 2025-08-27

  - releaseCycle: "141"
    releaseDate: 2025-07-22
    eol: 2025-08-19
    latest: "141.0.3"
    latestReleaseDate: 2025-08-07

  - releaseCycle: "140"
    lts: true
    releaseDate: 2025-06-24
    eol: 2026-09-29
    latest: "140.17.0"
    latestReleaseDate: 2026-09-29

  - releaseCycle: "139"
    releaseDate: 2025-05-27
    eol: 2025-06-24
    latest: "139.0.4"
    latestReleaseDate: 2025-06-10

  - releaseCycle: "138"
    releaseDate: 2025-04-29
    eol: 2025-05-27
    latest: "138.0.4"
    latestReleaseDate: 2025-05-17

  - releaseCycle: "137"
    releaseDate: 2025-04-01
    eol: 2025-04-29
    latest: "137.0.2"
    latestReleaseDate: 2025-04-15

  - releaseCycle: "136"
    releaseDate: 2025-03-04
    eol: 2025-04-01
    latest: "136.0.4"
    latestReleaseDate: 2025-03-27

  - releaseCycle: "135"
    releaseDate: 2025-02-04
    eol: 2025-03-04
    latest: "135.0.1"
    latestReleaseDate: 2025-02-18

  - releaseCycle: "134"
    releaseDate: 2025-01-07
    eol: 2025-02-04
    latest: "134.0.2"
    latestReleaseDate: 2025-01-21

  - releaseCycle: "133"
    releaseDate: 2024-11-26
    eol: 2025-01-07
    latest: "133.0.3"
    latestReleaseDate: 2024-12-10

  - releaseCycle: "132"
    releaseDate: 2024-10-29
    eol: 2024-11-26
    latest: "132.0.2"
    latestReleaseDate: 2024-11-12

  - releaseCycle: "131"
    releaseDate: 2024-10-01
    eol: 2024-10-29
    latest: "131.0.3"
    latestReleaseDate: 2024-10-14

  - releaseCycle: "130"
    releaseDate: 2024-09-03
    eol: 2024-10-01
    latest: "130.0.1"
    latestReleaseDate: 2024-09-17

  - releaseCycle: "129"
    releaseDate: 2024-08-06
    eol: 2024-09-03
    latest: "129.0.2"
    latestReleaseDate: 2024-08-20

  - releaseCycle: "128"
    lts: true
    releaseDate: 2024-07-09
    eol: 2025-09-16 # estimated release day for 140.3 on https://whattrainisitnow.com/calendar/
    latest: "128.14.0"
    latestReleaseDate: 2025-08-19

  - releaseCycle: "127"
    releaseDate: 2024-06-11
    eol: 2024-07-09
    latest: "127.0.2"
    latestReleaseDate: 2024-06-25

  - releaseCycle: "126"
    releaseDate: 2024-05-14
    eol: 2024-06-11
    latest: "126.0.1"
    latestReleaseDate: 2024-05-28

  - releaseCycle: "125"
    releaseDate: 2024-04-16
    eol: 2024-05-14
    latest: "125.0.3"
    latestReleaseDate: 2024-04-29

  - releaseCycle: "124"
    releaseDate: 2024-03-19
    eol: 2024-04-16
    latest: "124.0.2"
    latestReleaseDate: 2024-04-02

  - releaseCycle: "123"
    releaseDate: 2024-02-20
    eol: 2024-03-19
    latest: "123.0.1"
    latestReleaseDate: 2024-03-05

  - releaseCycle: "122"
    releaseDate: 2024-01-23
    eol: 2024-02-20
    latest: "122.0.1"
    latestReleaseDate: 2024-02-06

  - releaseCycle: "121"
    releaseDate: 2023-12-19
    eol: 2024-01-23
    latest: "121.0.1"
    latestReleaseDate: 2024-01-09

  - releaseCycle: "120"
    releaseDate: 2023-11-21
    eol: 2023-12-19
    latest: "120.0.1"
    latestReleaseDate: 2023-11-30

  - releaseCycle: "119"
    releaseDate: 2023-10-24
    eol: 2023-11-21
    latest: "119.0.1"
    latestReleaseDate: 2023-11-07

  - releaseCycle: "118"
    releaseDate: 2023-09-26
    eol: 2023-10-24
    latest: "118.0.2"
    latestReleaseDate: 2023-10-10

  - releaseCycle: "117"
    releaseDate: 2023-08-29
    eol: 2023-09-26
    latest: "117.0.1"
    latestReleaseDate: 2023-09-12

  - releaseCycle: "116"
    releaseDate: 2023-08-01
    eol: 2023-08-29
    latest: "116.0.3"
    latestReleaseDate: 2023-08-16

  - releaseCycle: "115"
    lts: true
    releaseDate: 2023-07-04
    eol: 2027-03-31 # https://whattrainisitnow.com/release/?version=esr
    latest: "115.38.0"
    latestReleaseDate: 2026-07-21

  - releaseCycle: "114"
    releaseDate: 2023-06-06
    eol: 2023-07-04
    latest: "114.0.2"
    latestReleaseDate: 2023-06-20

  - releaseCycle: "113"
    releaseDate: 2023-05-09
    eol: 2023-06-06
    latest: "113.0.2"
    latestReleaseDate: 2023-05-23

  - releaseCycle: "112"
    releaseDate: 2023-04-11
    eol: 2023-05-09
    latest: "112.0.2"
    latestReleaseDate: 2023-04-25

  - releaseCycle: "111"
    releaseDate: 2023-03-14
    eol: 2023-04-11
    latest: "111.0.1"
    latestReleaseDate: 2023-03-21

  - releaseCycle: "110"
    releaseDate: 2023-02-14
    eol: 2023-03-14
    latest: "110.0.1"
    latestReleaseDate: 2023-02-28

  - releaseCycle: "109"
    releaseDate: 2023-01-17
    eol: 2023-02-14
    latest: "109.0.1"
    latestReleaseDate: 2023-01-31

  - releaseCycle: "108"
    releaseDate: 2022-12-13
    eol: 2023-01-17
    latest: "108.0.2"
    latestReleaseDate: 2023-01-05

  - releaseCycle: "107"
    releaseDate: 2022-11-15
    eol: 2022-12-13
    latest: "107.0.1"
    latestReleaseDate: 2022-11-29

  - releaseCycle: "106"
    releaseDate: 2022-10-18
    eol: 2022-11-15
    latest: "106.0.5"
    latestReleaseDate: 2022-11-04

  - releaseCycle: "105"
    releaseDate: 2022-09-20
    eol: 2022-10-18
    latest: "105.0.3"
    latestReleaseDate: 2022-10-07

  - releaseCycle: "104"
    releaseDate: 2022-08-23
    eol: 2022-09-20
    latest: "104.0.2"
    latestReleaseDate: 2022-09-06

  - releaseCycle: "103"
    releaseDate: 2022-07-26
    eol: 2022-08-23
    latest: "103.0.2"
    latestReleaseDate: 2022-08-09

  - releaseCycle: "102"
    lts: true
    releaseDate: 2022-06-28
    eol: 2023-09-26
    latest: "102.15.1"
    latestReleaseDate: 2023-09-12

  - releaseCycle: "91"
    lts: true
    releaseDate: 2021-08-10
    eol: 2022-09-20
    latest: "91.13.0"
    latestReleaseDate: 2022-08-23

  - releaseCycle: "78"
    lts: true
    releaseDate: 2020-06-30
    eol: 2021-11-02
    latest: "78.15.0"
    latestReleaseDate: 2021-10-05

---

> [Firefox](https://www.firefox.com/), is a free and open-source web browser
> developed by the Mozilla. Firefox is available for
> [Windows](https://support.mozilla.org/kb/how-install-firefox-windows),
> [macOS](https://support.mozilla.org/kb/how-download-and-install-firefox-mac),
> [Android](https://support.mozilla.org/products/mobile),
> [iOS](https://support.mozilla.org/products/ios),
> [Linux](https://support.mozilla.org/kb/install-firefox-linux), and
> [ChromeOS](https://support.mozilla.org/kb/run-firefox-chromeos).

## Firefox has two main release channels

- **Firefox:** Simply named Firefox, this is the default channel and is the one recommended. It's
  the stable branch with the latest features available. Once a new release is out, the older release
  immediately stops receiving support and everyone must migrate to the next Firefox release.
- **Firefox Extended Support Release (ESR):** is an official version of Firefox developed for large
  organizations like universities and businesses that need to set up and maintain Firefox on a large
  scale. Firefox ESR does not come with the latest features, but it has the latest security and
  stability fixes. Usually these branches are supported for a year,
  [with a planned release calendar for new ESR branches.](https://whattrainisitnow.com/calendar/)
  For more information you should review the [release cycle documentation.](https://support.mozilla.org/kb/firefox-esr-release-cycle)

## Firefox also has three testing channels

- **Firefox Beta:** This branch is meant to reflect what the next **Firefox** release will look
  like. Every four weeks it gets cherry-picked changes from **Nightly**, then follows a three-weekly
  point release aimed at stabilizing the release for the stable branch. Version number is always
  `X + 1`, `X` being the **Firefox** version number.
- **Firefox Developer Edition:** This branch is based off the **Firefox Beta** branch with
  additional DevTools merged in. It gets released alongside the **Firefox Beta** release, following
  the same release pattern. Version number is always `X + 1`, `X` being the **Firefox** version
  number.
- **Firefox Nightly:** This is the branch that receives all the changes before anything else. It
  gets daily updates which represent the master branch. This is the branch that first features new
  changes/features, which then may be forwarded to **Firefox Beta** after being tested. Version
  number is always `X + 2`, `X` being the **Firefox** version number.

## Special notes

- Firefox 78 ESR was the last version of Firefox that supported macOS versions < 10.12 or Flash.
- Firefox only supports the last 3 macOS releases, [matching the Apple support cycle](https://support.mozilla.org/kb/firefox-mac-osx-users-esr).
- Firefox [ESR 115 support is extended](https://whattrainisitnow.com/release/?version=esr) for Windows 7–8.1 and macOS 10.12–10.14 up to March 2026, and this extension will be reconsidered in February 2026.