Mozilla Firefox version history
6 recorded versions, newest first. Each has its own page with release notes and the official download link.
| Version | Released | Platforms | What changed |
|---|---|---|---|
| Mozilla Firefox 157.0.1 Newest | 6 Oct 2026 | Windows x64, macOS Universal | Update. Release notes: https://www.mozilla.org/en-US/firefox/157.0.1/releasenotes/ |
| Mozilla Firefox 157.0 | 29 Sept 2026 | Windows x64, macOS Universal | Major release. Release notes: https://www.mozilla.org/en-US/firefox/157.0/releasenotes/ |
| Mozilla Firefox 156.0.1 | 22 Sept 2026 | Windows x64, macOS Universal | Update. Release notes: https://www.mozilla.org/en-US/firefox/156.0.1/releasenotes/ |
| Mozilla Firefox 156.0 | 15 Sept 2026 | Windows x64, macOS Universal | Major release. Release notes: https://www.mozilla.org/en-US/firefox/156.0/releasenotes/ |
| Mozilla Firefox 155.0.1 | 4 Sept 2026 | Windows x64, macOS Universal | Update. Release notes: https://www.mozilla.org/en-US/firefox/155.0.1/releasenotes/ |
| Mozilla Firefox 155.0 | 1 Sept 2026 | Windows x64, macOS Universal | Major release. Release notes: https://www.mozilla.org/en-US/firefox/155.0/releasenotes/ |
Downloads are provided by the publisher. Older versions can contain security problems that later releases fixed. How we record versions