Firefox 138.x — End of Life
EOLFirefox 138.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status |
|---|---|---|---|---|---|
| 138 | Apr 29, 2025 | — | May 27, 2025 | 138.0.4 | EOL |
CVEs affecting Firefox 138.x (0)
Firefox 138.x is EOL — migrate to Firefox 139.x
Firefox 139.x is the next major release. Plan your upgrade before Firefox 138.x stops receiving security patches.
Frequently asked questions
Is Firefox 138 end of life?
Yes. All Firefox 138.x releases have reached end of life and no longer receive security patches. Migrate to Firefox 139.x as soon as possible.
What CVEs affect Firefox 138?
No CVEs are currently tracked for Firefox 138.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest Firefox 138 version?
The latest Firefox 138.x patch release is 138.0.4, released on May 17, 2025. Always run the latest patch to benefit from all security fixes.
How to migrate from Firefox 138 to Firefox 139?
To migrate from Firefox 138 to Firefox 139: (1) review the official Firefox 139 migration guide for breaking changes, (2) update dependencies and configuration accordingly, (3) test thoroughly in a staging environment, (4) deploy with a rollback plan. Starting early gives you time to resolve compatibility issues before your current version reaches end of life.
Is it safe to run Firefox 138 in production?
No. Firefox 138 has reached end of life and security vulnerabilities are no longer patched. Upgrade to a supported version immediately.
Data sourced from endoflife.date · CVE data from NVD · EPSS from FIRST.org · KEV from CISA