To be more precise, Firefox ESR is an older version of Firefox with a deferred development cycle that aims to offer increased stability at the expense of the latest features.īe that as it may, the ESR line does not fully compromise security towards achieving this goal.

ESR releases are maintained for more than a year with important “point releases” that usually follow the regular Firefox releases. These so-called point releases contain imperative security upgrades. The past Firefox 52 ESR – the latest version to support XP and Vistaīefore September 2017, the ESR channel was home to older versions of Firefox. This was the pre-quantum era and, back then, Firefox 52 ESR (which is still available for download) offered support for both Windows XP and Vista. This proved to be invaluable for various international companies, at least for 2-3 years until they would inevitably have to move to newer versions of Windows.įirefox 52 ESR also offered support for Microsoft Silverlight and Java. Nowadays, the latest versions of Firefox ESR (60+) only offer support for Adobe Flash NPAPI plugin. Of course, the Firefox 52 ESR was based on the old version of Firefox so WebAssembly was not enabled by default, and the super-fast multi-process handling engine (Quantum) was no present.

The present Firefox ESR lineįirefox fans surely know that version 60 marked a very big transformation for their favorite browser. Firefox went through a massive overhaul starting with its engine and finishing with its look.

In most part, Firefox ESR and Firefox share the same functionalities.

Firefox esr download