What Is The Firefox ESR Version?
Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations like universities and businesses that need to set up and maintain Firefox on a large scale. Firefox ESR does not come with the latest features but it has the latest security and stability fixes.
Is Firefox ESR no longer supported?
Firefox ESR versions are maintained for a longer period compared to stable releases. ... The latter will see two additional releases, Firefox 78.14 ESR and Firefox 78.15 ESR before it will be discontinued; this will happen in October 2021. Firefox 91 ESR marks the beginning of a new base for extended support releases.
Firefox ESR 91: new ESR version will be released tomorrow
Is Firefox or Firefox ESR better?
Firefox ESR is essentially a more stable and tested version of regular Firefox. This is accomplished by holding back the latest feature upgrades, at least until they've been thoroughly tested in the main branch of Firefox. While foregoing the newest features, ESR still maintains current security and stability patches.
Firefox vs Firefox ESR on Linux - Linux Tutorials - LinuxConfig.org
Firefox Extended Support Release (ESR), currently based on Firefox 52, is a version of Firefox that comes equipped with the newest security and safety improvements, but uses the older version of Firefox for everything else. This allows users to access tools which are not yet available in Firefox Quantum.
Firefox ESR Installation - Accessibility at Penn State