Firefox 149 release notes for enterprise admins

Find a version

All versionsAll versions forward

Firefox 149

March 24, 2026

These changes apply to Firefox 149 and Firefox ESR 140.9.0 unless explicitly stated.

New in Firefox 149.0.2

• AIControls: Configure AI controls. Does not apply to the ESR.
• IPProtectionAvailable: Prevent the built-in VPN from being available to users. Does not apply to the ESR.