Mozilla no longer hosts old ESR versions on its main site. However, the is available here:
In the fast-paced world of web browsers, where new versions are released every few weeks, it is rare for a piece of software to remain relevant years after its launch. Yet, holds a unique and critical place in the ecosystem. Released in the summer of 2018, this specific build represents the final iteration of the Firefox 52 Extended Support Release (ESR) cycle. firefox version 52.9. 0 esr download
Before you proceed with the download, you must understand that Firefox 52.9.0 ESR is an End-of-Life (EOL) product. Mozilla officially terminated all support and security updates for it in September 2018. Using it on a daily basis carries . Mozilla no longer hosts old ESR versions on its main site
/win32/ (Recommended for maximum compatibility on older systems) Windows 64-bit: /win64/ Linux: /linux-i686/ or /linux-x86_64/ Mac: /mac/ Released in the summer of 2018, this specific
: To prevent the browser from automatically trying to update to an unsupported newer version, users often disable updates in about:config by searching for app.update Mozilla Support System Requirements : Pentium 4 or newer (must support : At least 512MB (Windows XP) or 1GB (Vista/7). : 200MB hard drive space. If you're using this for a specific , I can help you find lighter alternatives or help with disabling auto-updates