Firefox 147.x — End of Life
EOLFirefox 147.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status |
|---|---|---|---|---|---|
| 147 | Jan 13, 2026 | — | Feb 24, 2026 | 147.0.4 | EOL |
CVEs affecting Firefox 147.x (0)
Firefox 147.x is EOL — migrate to Firefox 148.x
Firefox 148.x is the next major release. Plan your upgrade before Firefox 147.x stops receiving security patches.
Frequently asked questions
Is Firefox 147 end of life?
Yes. All Firefox 147.x releases have reached end of life and no longer receive security patches. Migrate to Firefox 148.x as soon as possible.
What CVEs affect Firefox 147?
No CVEs are currently tracked for Firefox 147.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest Firefox 147 version?
The latest Firefox 147.x patch release is 147.0.4, released on February 16, 2026. Always run the latest patch to benefit from all security fixes.
How to migrate from Firefox 147 to Firefox 148?
To migrate from Firefox 147 to Firefox 148: (1) review the official Firefox 148 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 147 in production?
No. Firefox 147 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