# Firefox 155 — lifecycle date releaseDate is now 2026-09-01

For Firefox 155, product is firefox; field changed is releaseDate; new value is 2026-09-01; detected is 2026-09-02, verified against its source on 2026-09-02.

- **Product:** firefox _(verified: appears in the quote below)_
- **Product label:** Firefox _(verified: appears in the quote below)_
- **Release cycle:** 155 _(verified: appears in the quote below)_
- **Field changed:** releaseDate _(verified: appears in the quote below)_
- **New value:** 2026-09-01 _(verified: appears in the quote below)_
- **Detected:** 2026-09-02 _(verified: appears in the quote below)_

## What the source says

> {"name":"155","codename":null,"label":"155","releaseDate":"2026-09-01"

## Source

- https://endoflife.date/api/v1/products/firefox

Last verified: 2026-09-02. Review by: 2026-09-16.
Part of [Software end-of-life date changes — which dates moved and what they were before](https://referencesource.org/software-eol-change-feed/).