Download |work| Old Version Of Firefox Esr May 2026

Mozilla hosts all previous releases on its official directory servers. To ensure you are downloading an authentic installer rather than a tampered file from a third party, always use these official sources:

: Look for version numbers followed by "esr" (e.g., 115.0esr/ or 128.0esr/ ). Choose Your Operating System : download old version of firefox esr

: Select linux-i686/ (32-bit) or linux-x86_64/ (64-bit). Mozilla hosts all previous releases on its official

: Firefox might block you from using your existing profile with an older version. You may need to create a new profile by launching the Profile Manager (typing firefox.exe -P in the Run dialog on Windows). en-US for US English).

: Choose your regional language folder (e.g., en-US for US English).