Firefox 148 release notes for enterprise admins

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Firefox 148

Released 24 February 2026.

These changes apply to Firefox 148 unless explicitly stated. Firefox ESR 140.8.0 shipped the same day, but these changes were not backported to it.

New in Firefox 148

DisableRemoteImprovements: Prevent Firefox from applying performance, stability, and feature changes between updates.

Changes

GenerativeAI: Updated to cover PDF alt text generation and translations. (bug 2013938)
AI Controls settings now respect enterprise policy and locale or region restrictions. (bug 2005805)
Firefox now reports whether a profile is managed by enterprise policy, as policies.is_enterprise in the baseline telemetry ping. (bug 1997959)