Firefox 151.x — End of Life
EOLFirefox 151.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status | Alert me |
|---|---|---|---|---|---|---|
| 151 | May 18, 2026 | — | Jun 16, 2026 | 151.0.4 | EOL |
CVEs affecting Firefox 151.x (0)
Firefox 151.x is EOL — migrate to Firefox 152.x
Firefox 152.x is the next major release. Plan your upgrade before Firefox 151.x stops receiving security patches.
Frequently asked questions
Is Firefox 151 end of life?
Yes. All Firefox 151.x releases have reached end of life and no longer receive security patches. Migrate to Firefox 152.x as soon as possible.
What CVEs affect Firefox 151?
No CVEs are currently tracked for Firefox 151.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest Firefox 151 version?
The latest Firefox 151.x patch release is 151.0.4, released on June 9, 2026. Always run the latest patch to benefit from all security fixes.
How to migrate from Firefox 151 to Firefox 152?
To migrate from Firefox 151 to Firefox 152: (1) review the official Firefox 152 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 151 in production?
No. Firefox 151 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