Firefox 52 was a landmark release, but it is remembered most famously for what came after it.
Because this is a legacy version, standard download pages will redirect you to the latest version of Firefox. To find the 52.9.0 ESR installer, you must use official archive repositories: firefox version 52.9. 0 esr download
Mozilla strongly warns that since September 2018 — no security updates. Do not use as a daily browser, especially for banking or sensitive accounts. Firefox 52 was a landmark release, but it