Within each folder, download the .exe , .dmg , or .tar.bz2 file (e.g., Firefox%20Setup%2052.9.0esr.exe ).
While outdated now, at its release, 52.9.0 included all security fixes from the preceding 15 months, including patches for critical zero-day vulnerabilities. firefox version 52.9. 0 esr download
| Platform | Architecture | File name example | |----------|--------------|-------------------| | Windows | 32-bit | Firefox Setup 52.9.0esr.exe | | Windows | 64-bit | Firefox Setup 52.9.0esr_x64.exe | | macOS | Universal | Firefox 52.9.0esr.dmg | | Linux | 64-bit | firefox-52.9.0esr.tar.bz2 | Within each folder, download the
For the millions of machines still running Windows XP (e.g., point-of-sale systems, industrial control panels, museum kiosks, and classic gaming rigs), Firefox 52.9.0 ESR represents the final secure gateway to the modern web. After this version, no further Firefox updates—security or otherwise—would work on those systems. After this version, no further Firefox updates—security or
: As an ESR release, it focused on long-term stability with essential security patches rather than new consumer features . System Requirements
We use cookies to enhance your experience. Essential cookies are required for the site to function. You can choose to accept all cookies or only essential ones.
Learn more