There are however some notable differences. In most part, Firefox ESR and Firefox share the same functionalities. Firefox went through a massive overhaul starting with its engine and finishing with its look. The present Firefox ESR lineįirefox fans surely know that version 60 marked a very big transformation for their favorite browser. 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. Nowadays, the latest versions of Firefox ESR (60+) only offer support for Adobe Flash NPAPI plugin.

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. 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. 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. These so-called point releases contain imperative security upgrades.

ESR releases are maintained for more than a year with important “point releases” that usually follow the regular Firefox releases. 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. For example, imagine a national school system having to change their entire browser system because a new release does not support some important outdated features (but relevant to the system in question) or worse because of a security vulnerability.įound under the moniker of Firefox ESR (stands for Extended Support Release), it’s a browser specifically designed for organizations that require extended support. One of the main issues with mass software deployment within organizations can be the lack of extended support. It may be unknown to many day-to-day users out there that the Mozilla Foundation offers a product specifically aimed at medium to extremely large organizations (schools, universities, and other international businesses).

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