Firefox 159 Release - Firefox Release Schedule - Nundina

Nundina › Discover calendars › Firefox Release Schedule calendar › Firefox 159 ReleaseFirefox 159 Release27 October 2026 at 14:00 UTCFirefox 159 Release: released to everyone on the Release channel. Planned for 2026-10-27 14:00 UTC.Firefox Release Schedule calendarMore from this calendar

26 October 2026 at 13:00 UTC - Firefox 160 Beta 1

3 November 2026 at 14:00 UTC - Firefox 159 Dot Release 1

4 November 2026 at 00:00 UTC - Firefox 161 String Freeze

5 November 2026 at 16:00 UTC - Firefox 161 Merge Day

9 November 2026 at 13:00 UTC - Firefox 161 Beta 1