Firefox — 12.51 52 Esr
Disabled Service Workers, Push Notifications, and WebAssembly by default for stability.
Firefox 52.0 ESR was released on . It was based on the Firefox 52 codebase but designed for organizations needing stability over rapid feature updates. ESR versions receive only backported security fixes and critical bug fixes, with no new features added mid-cycle.
However, the inclusion of "12.51" in the query likely stems from two sources: the or misremembered versioning . firefox 12.51 52 esr
| ESR Version | Based on | Release Date | End of Support | Last OS support | |-------------|----------|--------------|----------------|------------------| | Firefox 10 ESR | Firefox 10 | Jan 2012 | Feb 2013 | Windows XP (until 2018 via 52) | | Firefox 17 ESR | Firefox 17 | Nov 2012 | Nov 2014 | Windows XP | | Firefox 24 ESR | Firefox 24 | Sep 2013 | Sep 2015 | Windows XP | | Firefox 31 ESR | Firefox 31 | Jul 2014 | Jul 2016 | Windows XP | | Firefox 38 ESR | Firefox 38 | May 2015 | May 2017 | Windows XP | | | Firefox 45 | Mar 2016 | Apr 2017 | Windows XP | | Firefox 52 ESR | Firefox 52 | Mar 2017 | Sep 2018 | Last XP/Vista support | | Firefox 60 ESR | Firefox 60 | May 2018 | Oct 2019 | Windows 7+ only |
In the fast-paced world of web browsers, version numbers usually tick by without a second thought. However, certain numerical combinations capture the attention of system administrators, digital archaeologists, and IT managers running legacy infrastructures. One such cryptic phrase is ESR versions receive only backported security fixes and
Notably, Firefox 52 ESR was the first ESR release to begin phasing out XUL add-ons (legacy extensions) in favor of WebExtensions, aligning with the transition that completed in Firefox 57.
In practice, if you require a browser for Windows XP today, the only secure (relatively) choice is , not any 12.x version. Anything older than 52 ESR has unpatched vulnerabilities. followed by 13.0
First, let’s clear the air: The official releases followed a sequence: Firefox 12.0 (April 2012), followed by 13.0, 14.0, and so on. There were minor updates like 12.0.1 or 12.0.2 for security patches, but never a "12.51."
Firefox 52.0 released: find out what is new - gHacks Tech News 7 Mar 2017 —