Question 1

What is the EOL Risk Score for Firefox 120?

Accepted Answer

Firefox 120 has an EOL Risk Score™ of 80 out of 100, placing it in the Critical risk band. The score is calculated from four factors: EOL Recency (40/40), Attack Surface (10/30), CISA KEV Exposure (20/20), and Extended Support Availability (10/10).

Question 2

Is Firefox 120 still supported?

Accepted Answer

Firefox 120 is no longer supported — it has passed its end of life date (December 19, 2023). No further security patches will be issued. Upgrade to a supported version or obtain extended lifecycle support.

Question 3

When does Firefox 120 reach end of life?

Accepted Answer

Firefox 120 reached (or will reach) end of life on December 19, 2023. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Firefox 120 after end of life?

Accepted Answer

After end of life, Firefox 120 no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.