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Firefox 151

Support for Firefox 151 ended on 16/06/2026. There are no more security updates for this branch.

End of support reached

Latest version: 151.0.4, released on 09/06/2026

End of support: 16/06/2026

325 known vulnerabilities open in 151.0.4

Vulnerabilities in Firefox 151

327 vulnerabilities from the NVD affect at least one version of this branch. Last checked on 03/11/2026.

And 227 more.

66 vulnerabilities of Firefox have no version information in the NVD and are not assigned to any branch.

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