Firefox 105 End of Life

Support dates and upgrade guidance — rebuilt from live data.

End of Life

Firefox 105 reached end of life on 18 Oct 2022. It no longer receives security fixes.

1,391 days without security patches

Recommended action: upgrade to Firefox 153.

Check your versionfirefox --version

Support timeline

Official dates from the Firefox release process.

Milestone	Date	Status
Initial release	20 Sept 2022	—
End of life	18 Oct 2022	3.8 years ago
Latest release	105.0.3 · 7 Oct 2022	final

Where to go from 105

Recommended target: Firefox 153.

The newest actively supported branch is Firefox 153 (latest release 153.0.3).

Frequently asked questions

Is Firefox 105 still safe to use?

Firefox 105 reached end of life on 18 Oct 2022, 1,391 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.

Can I still download Firefox 105?

Yes — the final release (105.0.3) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.

What should I upgrade Firefox 105 to?

Upgrade to Firefox 153, the newest actively supported branch.

Firefox 105 End of Life

Support timeline

Where to go from 105

Frequently asked questions

All Firefox versions