Question 1

What is the EOL Risk Score for Firefox 154?

Accepted Answer

Firefox 154 has an EOL Risk Score™ of 40 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (0/40), Attack Surface (10/30), CISA KEV Exposure (20/20), and Extended Support Availability (10/10).

Question 2

Is Firefox 154 still supported?

Accepted Answer

Firefox 154 is currently supported. End of life is scheduled for a future date. Plan your migration before that date to avoid security risk.

Question 3

When does Firefox 154 reach end of life?

Accepted Answer

The end of life date for Firefox 154 is not yet scheduled. Check the full Firefox version timeline at endoflife.ai/firefox.html for the latest information.

Question 4

What are the security risks of running Firefox 154 after end of life?

Accepted Answer

After end of life, Firefox 154 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.