Firefox Version 52.9. 0 Esr Portable Download Jun 2026

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

: Depending on your distribution, you might find it in the repositories or have to use a specific command. For instance, on Ubuntu, you might use apt to find a suitable package: firefox version 52.9. 0 esr download

It is the absolute last official Mozilla release that will run on these systems. It was the last version to allow non-Flash

Because this version is no longer active, it is not available on the main Firefox homepage. You must access it through Mozilla's official archive servers: such as Silverlight or Java