Was October 27, 2026 a new browser version?
YES
Yes — Firefox 159 ships today, October 27, 2026, at 13:00 UTC (6 AM Pacific).
Why
- Firefox 159 release date: October 27, 2026
- Ships 13:00 UTC with an initial 25% rollout
- Bundled ESR updates: 153.6.0 and 115.44.0