Firefox 153 End of Life

Support dates and upgrade guidance — rebuilt from live data.

Supported

Firefox 153 is actively supported.

153.0.3 latest release

Check your versionfirefox --version

Support timeline

Official dates from the Firefox release process.

When does Firefox 153 reach end of life?

No end-of-life date has been announced for Firefox 153 yet.

Is Firefox 153 still supported?

Yes. Firefox 153 is currently maintained. Latest release: 153.0.3, published 4 Aug 2026.

What happens when Firefox 153 reaches end of life?

Security fixes stop. After — this branch receives no further updates under standard support.

How long do I have to upgrade from Firefox 153?

No end-of-life date has been announced yet.