Mozilla maintains a comprehensive public archive for all its browser releases.
The primary source for every historical version of Firefox is the Mozilla FTP server . Versions ending in "esr" (e.g., 115.0esr ) indicate the Extended Support Release channel. download old firefox esr
Scroll to find your desired version number (e.g., 102.15.1esr/ ) and click it. Choose Operating System: Windows: Select win32/ (for 32-bit) or win64/ (for 64-bit). macOS: Select mac/ . Linux: Select linux-x86_64/ . Mozilla maintains a comprehensive public archive for all