Nundina › Discover calendars › Firefox Release Schedule calendar › Firefox 161 Merge DayFirefox 161 Merge Day5 November 2026 at 16:00 UTCFirefox 161 Merge Day: code moves from Nightly to Beta (Nightly becomes the next version). Planned for 2026-11-05 16:00 UTC.Firefox Release Schedule calendarMore from this calendar