It is the absolute last official Mozilla release that will run on these systems.
: Windows XP SP2 or Vista. For these systems, you must use the 32-bit version , as 64-bit Firefox requires Windows 7 or higher . Mac : Supported on OS X 10.9 through 10.12 . firefox version 52.9. 0 esr download
It was the last version to allow non-Flash NPAPI plugins, such as Silverlight or Java, which are still required by some internal corporate applications. Official System Requirements It is the absolute last official Mozilla release
. Because this version is legacy software released in June 2018, it is no longer available on the main Firefox download page and must be accessed through Mozilla's official archive servers. Official Download Links To ensure a safe and authentic download, use the Mozilla FTP Archive Mac : Supported on OS X 10
Before you download, ensure your system meets these legacy requirements: Firefox ESR 52.9.0, See All New Features, Updates and Fixes