hi, firefox is released roughly every six weeks & only the current release is supported. for larger organisations there is also an extended support release which base changes roughly every 10 months, but the browser is receiving security updates in between. details about the latter version are available at https://www.mozilla.org/en-US/firefox/organizations/faq/

If you are looking for something particular, perhaps you can provide a link to the kind of information you're looking for supplied by another browser maker so we have a fuller idea of what you have in mind.

Unfortunately the information on ESR doesn't explicitly state what Firefox's support policy is outside of that particular program. I need a simple to the point statement of what is officially supported for users, see the following chrome support article that indicates only the latest version is supported See under the 'Support' section the answer to "How many versions back do you support' in which Chrome provides the answer 'Google only supports the most current dev, beta, and stable channel releases.'

https://support.google.com/chrome/a/answer/188447?hl=en&ref_topic=4386908

The current ESR is 38 and the next one is 45 (which is in quality phase, release date at the end of May). During the quality phase ( ~3 months), two versions of ESR are supported: the current one and the next one. After that, the new ESR is released and the current one becomes EOLed. ESR owns to the Release channel so there is no support for beta/aurora/nightly ESR.

No the Firefox 45.0 ESR has been current since its Release and the 38 ESR has been considered the previous since. https://www.mozilla.org/firefox/organizations/all/

The 38.8.0esr will be the last as the most it will get is a chemspill update if any which will look like 38.8.1 esr.

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https://www.mozilla.org/en-US/firefox/releases/

To the OP, when a new Major Release version comes out the previous Release is considered EOL as it will not get anymore updates.

The Firefox 45.0.2 Release is EOL however the 45.1.1esr (came out when 46.0.1 did) based on Firefox 45 Release is the current.

James, Do you know of any location where what you stated is explicitly stated by Mozilla?

"To the OP, when a new Major Release version comes out the previous Release is considered EOL as it will not get anymore update"

Thats what I really need

This is common knowledge that the previous Release branch is made EOL when a new major Release comes out. The Firefox 45.0.2 was made EOL when Firefox 46.0 was Released.

There was a time long ago when Mozilla supported a previous version branch for a while still as the last time that happened was when Firefox 3.6 continued to get security/stability updates after Firefox 4.0 was released. The Firefox 3.6 was supposed to end as of 3.6.16 (if I recall version) and instead it got a extension to 3.6.28.

Ever since then no previous Release version branch was supported apart for the ESR channel versions as I mentioned the 38.8.1 will likely be last for the old 38 ESR branch as ESR generally only goes for eight updates.

https://wiki.mozilla.org/RapidRelease/Calendar https://www.mozilla.org/en-US/firefox/releases/