Mozilla Firefox ↗

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Track your version:Monitors Mozilla Firefox and tailors your dashboard to that exact version.

152.0 · latest cycle—/100 Unknown

Summary iPlain-English security verdict for Mozilla Firefox, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.

Mozilla Firefox's security status could not be assessed at the last sync — vulnerability data was unavailable.

Disclosure trend iNew CVEs published for Mozilla Firefox each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.

'19

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Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.

No urgent unpatched issues identified. ✓

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Versions & lifecycle iWhen each release line stops receiving security patches (end-of-life). After EOL there are no more fixes — plan upgrades before these dates.

How long each Mozilla Firefox release line is supported — and when it sunsets. Select a line for its full report.

Sept16'26 Mozilla Firefox 140EOL 2026-09-16

Aug28'26 Mozilla Firefox 115EOL 2026-08-28

Jun16'26 Mozilla Firefox 151ended 2026-06-16

May18'26 Mozilla Firefox 150ended 2026-05-18

Apr21'26 Mozilla Firefox 149ended 2026-04-21

Mar24'26 Mozilla Firefox 148ended 2026-03-24

Feb24'26 Mozilla Firefox 147ended 2026-02-24

Jan13'26 Mozilla Firefox 146ended 2026-01-13

Dec9'25 Mozilla Firefox 145ended 2025-12-09

Nov11'25 Mozilla Firefox 144ended 2025-11-11

Oct14'25 Mozilla Firefox 143ended 2025-10-14

Sept16'25 Mozilla Firefox 142ended 2025-09-16

Full Mozilla Firefox end-of-life dates & support timeline →

Frequently asked

Is Mozilla Firefox safe and patched?

Mozilla Firefox's security status could not be assessed at the last sync — vulnerability data was unavailable.

What should I do about Mozilla Firefox now?

Upgrade Mozilla Firefox to the latest supported release (152.0) or later and apply available security updates, then confirm against Mozilla's official advisory.

When does Mozilla Firefox reach end-of-life?

The latest supported Mozilla Firefox release is 152.0. After end-of-life a release no longer receives security patches.

Which versions of Mozilla Firefox are still receiving security updates?

Supported Mozilla Firefox release lines (latest 152.0): 152, 140, 115. End-of-life releases no longer receive security patches.

Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Mozilla's official advisory before you patch or upgrade — Mozilla Firefox official site ↗