As of 2026, finding a reliable browser for systems like or early Windows Vista is difficult. Firefox 52.9.0 Extended Support Release (ESR) is generally recognized as the final, functional version designed to support these legacy operating systems.
Mozilla stopped supporting Firefox 52 ESR in 2018 [1]. firefox version 52.9. 0 esr download
: Click on the executable link (e.g., Firefox Setup 52.9.0esr.exe ) to start your download. Crucial Security Warnings and Risks As of 2026, finding a reliable browser for
: Avoid searching random freeware download directories. Go directly to Mozilla's directory server at ftp.mozilla.org or archive.mozilla.org . As of 2026
Necessary for interacting with archived web media and legacy training modules.