# Firefox 156 — lifecycle date releaseDate is now 2026-09-15

For Firefox 156, product is firefox; field changed is releaseDate; new value is 2026-09-15; detected is 2026-09-16, recorded from its source on 2026-09-16; source re-checked 2026-10-26.

- **Product:** firefox
- **Product label:** Firefox
- **Release cycle:** 156 _(verified: appears in the quote below)_
- **Field changed:** releaseDate _(verified: appears in the quote below)_
- **New value:** 2026-09-15 _(verified: appears in the quote below)_
- **Detected:** 2026-09-16 _(our reading, not quoted from the source)_

## What the source says

> {"name":"156","codename":null,"label":"156","releaseDate":"2026-09-15"

## Source

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

Last verified: 2026-10-26. Review by: 2026-11-09.
Part of [Software end-of-life date changes — which dates moved and what they were before](https://referencesource.org/software-eol-change-feed/).