Firefox 115 · Version Status
Firefox 115 End of Life Date
Firefox 115 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
⚡
Firefox 115 reaches end of life in March 2027. Plan your migration now (the vendor names the month only).
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EOL Date
Mar 2027
EOL in March 2027
Latest Release
115.44.0
LTS release
Release Date
Jul 4, 2023
Firefox 115 series
Where these dates come from
End of lifeMar 2027endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Firefox 115 was released on July 4, 2023 and support is scheduled to end in March 2027 — a planned supported lifespan of 3 years and 9 months, longer than the 1 year and 3 months median for Firefox LTS releases. It is a long-term support (LTS) release, so it carries a longer patch window than the interim releases around it. Its most recent patch is 115.44.0, published October 27, 2026.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
20/20 Named in CISA KEV
Extended Support
10/10 None available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
| Version | Latest | EOL Date | Status |
|---|
| 78 LTS |
78.15.0 |
Nov 2, 2021 |
EOL |
| 91 LTS |
91.13.0 |
Sep 20, 2022 |
EOL |
| 102 LTS |
102.15.1 |
Sep 26, 2023 |
EOL |
| 103 |
103.0.2 |
Aug 23, 2022 |
EOL |
| 104 |
104.0.2 |
Sep 20, 2022 |
EOL |
| 105 |
105.0.3 |
Oct 18, 2022 |
EOL |
| 106 |
106.0.5 |
Nov 15, 2022 |
EOL |
| 107 |
107.0.1 |
Dec 13, 2022 |
EOL |
What does Firefox 115 end of life mean?
When Firefox 115 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Firefox 115 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Firefox 153 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Firefox 115 reach end of life?
Firefox 115 reaches end of life in March 2027. The vendor publishes the month only, not a day.
Is Firefox 115 still supported?
Firefox 115 is still supported but approaching end of life in March 2027. Begin planning your migration now.
What should I upgrade to from Firefox 115?
The recommended upgrade from Firefox 115 is
Firefox 153 — the latest actively supported version. Check the
Firefox full timeline for all supported versions.
What are the security risks of running Firefox 115 past EOL?
When Firefox 115 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Firefox should migrate immediately or implement compensating controls.