# Mozilla speeds Firefox release schedule to biweekly

- URL: https://talkfuse.com/story/mozilla-speeds-firefox-release-schedule-to-biweekly/
- Published: 2026-07-17T17:40:00+00:00
- Updated: 2026-07-21T16:14:18+00:00
- Original publisher: The Register
- Original article: https://www.theregister.com/software/2026/07/17/mozilla-speeds-firefox-release-schedule-to-biweekly/5274423
- Topics: Software

## Key points

- Firefox moves to fortnightly releases from September 2026, on trial.
- ESR releases stay annual; unaffected by the faster cadence.
- Firefox 153, out 21 July, becomes the next ESR with PDF and security upgrades.

## Summary

Mozilla plans to speed up Firefox's release cadence from every four weeks to every two weeks, starting in September 2026, in an experimental change announced by director of engineering Sylvestre Ledru. The Extended Support Release (ESR) schedule, which offers longer-term stability for enterprises and cautious users, will remain unaffected and continue on its annual cycle, with the next ESR version due imminently. Mozilla says the faster pace does not mean features will be rushed out before they are ready, and it will monitor the change closely before deciding whether to keep it.

Under the new schedule, Firefox 155 will arrive on 1 September 2026 rather than 15 September, with releases roughly a fortnight apart thereafter; Firefox 153 and 154 will still follow the current four-week rhythm. Mozilla previously used a similar cadence over a decade ago, and Google made a comparable move for Chrome in March. In the nearer term, Firefox 153, due for release on 21 July, will become the next ESR version with security support until at least late 2027, and brings features including PDF merging and image insertion, QR code generation for offline page sharing, support for the EU's new Qualified Website Authentication Certificates, a location-use indicator icon, and a change that removes extensions' local-file access by default.

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Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.