Request for Firefox ESR Portable Release History and Release Dates
Hello,
I would like to obtain the complete release history of Firefox ESR Portable, including:
The exact release date of each Firefox ESR Portable version. The corresponding Firefox ESR version number (e.g., 115.x ESR, 128.x ESR, 140.x ESR, etc.). Any available information regarding delays between the release of Firefox ESR by Mozilla and the release of Firefox ESR Portable.
Could you please provide a list of all Firefox ESR Portable releases along with their release dates, or direct me to an official source where this information can be found?
Thank you for your assistance.
Gekose oplossing
Please familiarize yourself with whattrainisitnow.com which has the ESR timelines, release calendar and API endpoints that you can poll for up–to–date data relevant to release operations.
All Replies (11)
Is this what you are looking for ; https://ftp.mozilla.org/pub/firefox/releases/
Mozilla does not produce anything like "ESR Portable" — you'd need to ask around the packager or the provider of such release format.
I am targeting Firefox ESR 153.3.0 and would like to know its exact release date, along with the planned release dates for subsequent ESR versions.
Could you please provide a release matrix or roadmap that includes:
Firefox ESR version numbers Planned release dates Future ESR maintenance releases following ESR 153.3.0
This information will help us plan our deployment and validation activities.
Thank you for your assistance.
Gekose oplossing
Please familiarize yourself with whattrainisitnow.com which has the ESR timelines, release calendar and API endpoints that you can poll for up–to–date data relevant to release operations.
Hi yassine.nsiri, I'm only a volunteer on this community forum, I'm not privy to the information you seek.
The old release calendar wiki is gone.😥
https://firefox-admin-docs.mozilla.org/guides/firefox-channels/
That is correct, the dates need to be managed on so many surfaces and data sets so it's now just pulled from the upstream sources of truth in the other release engineering systems.
The new calendars whattrainisitnow.com/calendar and whattrainisitnow.com/calendar/monthly now also provide .ics exports/subscriptions, embedding and other release management views if you're so inclined:
Bonjour
A article https://www.camp-firefox.de/artikel/1231-firefox-features-updates-künftig-alle-zwei-wochen
Similar discussions https://support.mozilla.org/en-US/questions/1590804
To complement, a subject DisableAppUpdate
And if you need the Release Notes of the ESR versions when they are released as they are listed on https://www.firefox.com/releases/
yassine.nsiri said
The exact release date of each Firefox ESR Portable version. The corresponding Firefox ESR version number (e.g., 115.x ESR, 128.x ESR, 140.x ESR, etc.).
The Fx 128.0 ESR is EOL in updates as Fx 128.14.0 released last year August 19, 2025 was the last update.
Fx 140 ESR is almost done as 140.17 esr will be the last. The Fx 115 ESR is being updated still with stability/security fixes with Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 OS users in mind.
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