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Mozilla Automation TeamRizki Kelimutu4 min readintro

Firefox new release cadence and what to expect

Read on mozilla.org

Summary

Firefox is shifting to a two‑week release cadence starting with version 155 on Sep 1 2026 to deliver bug fixes faster and make schedules predictable; SUMO contributors will see more frequent support spikes and must adapt content and localization workflows.

  • Firefox 155 launches Sep 1 2026, establishing a two‑week release cycle instead of four weeks.
  • Dot releases will still occur when needed but are not the primary driver of the new cadence.
  • Support question volume spikes will happen every two weeks, so contributors should focus effort in the first 10 days after each release.
  • Knowledge‑base and localization teams will receive content requests on a more distributed timeline; use the new "sumo-contributors" Bugzilla tag to find work.

Firefox contributors, support engineers, and localization volunteers need to adjust their workflows to keep up with the faster release rhythm.

5/10
firefoxlocalizationrelease managementcommunitysupport

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