Firefox 149.x — End of Life
EOLFirefox 149.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status |
|---|---|---|---|---|---|
| 149 | Mar 24, 2026 | — | Apr 21, 2026 | 149.0.2 | EOL |
CVEs affecting Firefox 149.x (0)
Firefox 149.x is EOL — migrate to Firefox 150.x
Firefox 150.x is the next major release. Plan your upgrade before Firefox 149.x stops receiving security patches.
Frequently asked questions
Is Firefox 149 end of life?
Yes. All Firefox 149.x releases have reached end of life and no longer receive security patches. Migrate to Firefox 150.x as soon as possible.
What CVEs affect Firefox 149?
No CVEs are currently tracked for Firefox 149.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest Firefox 149 version?
The latest Firefox 149.x patch release is 149.0.2, released on April 7, 2026. Always run the latest patch to benefit from all security fixes.
How to migrate from Firefox 149 to Firefox 150?
To migrate from Firefox 149 to Firefox 150: (1) review the official Firefox 150 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 149 in production?
No. Firefox 149 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