Firefox 78.x — End of Life
EOLFirefox 78.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status |
|---|---|---|---|---|---|
| 78LTS | Jun 30, 2020 | — | Nov 2, 2021 | 78.15.0 | EOL |
CVEs affecting Firefox 78.x (0)
Firefox 78.x is EOL — migrate to Firefox 91.x
Firefox 91.x is the next major release. Plan your upgrade before Firefox 78.x stops receiving security patches.
Frequently asked questions
Is Firefox 78 end of life?
Yes. All Firefox 78.x releases have reached end of life and no longer receive security patches. Migrate to Firefox 91.x as soon as possible.
What CVEs affect Firefox 78?
No CVEs are currently tracked for Firefox 78.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest Firefox 78 version?
The latest Firefox 78.x patch release is 78.15.0, released on October 5, 2021. Always run the latest patch to benefit from all security fixes.
How to migrate from Firefox 78 to Firefox 91?
To migrate from Firefox 78 to Firefox 91: (1) review the official Firefox 91 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 78 in production?
No. Firefox 78 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