Download Firefox 12-51 52 Esr [hot] Jun 2026

Windows XP and Windows Vista cannot run modern versions of Firefox. Firefox 52.9.0 ESR is the absolute end-of-the-line version for these operating systems.

Click the .exe , .dmg , or .tar.bz2 installer link to begin the direct download. System Requirements and OS Compatibility Download Firefox 12-51 52 Esr

Downloading old software carries significant risk if sourced from third-party "warez" websites, which frequently bundle installers with malware or adware. Windows XP and Windows Vista cannot run modern

Select your language (e.g., en-US ). Download the installer file ending in .exe (for Windows) or .dmg (for Mac). and select Options or Preferences .

: Open Firefox, click the menu button (three horizontal lines), and select Options or Preferences .