Hi Team, We have created a package for ESR version, but when we tested with older version i.e. 78.4.1. We are not able to stop the Automatic Mozilla Firefox update through script. Attaching the script command: // Disable Auto Update lockPref("app.update.enabled", false); lockPref("app.update.auto", false); lockPref("app.update.service.enabled", false); lockPref("app.update.mode", 0); lockPref("app.update.BITS.enabled", false); lockPref("app.update.auto.migrated", false); lockPref("app.update.checkInstallTime", false); lockPref("app.update.staging.enabled", false); lockPref("app.update.doorhanger", false); lockPref("app.update.url", "https://google.com/"); Install command that we used is: msiexec.exe /i "%~dp0FirefoxSetup78.4.1esr_x64.msi" INSTALL_MAINTENANCE_SERVICE=false /qn ================================================================================== echo Script to disable auto update of Firefox using Registry... ================================================================================== REG ADD HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox /v AppAutoUpdate /t REG_DWORD /d 0 /f =================================================================================== echo Script for customization firefox ... =================================================================================== If exist "%ProgramFiles%\Mozilla Firefox\" copy /Y "%~dp0override.ini" "%ProgramFiles%\Mozilla Firefox\browser\" If exist "%ProgramFiles%\Mozilla Firefox\" copy /Y "%~dp0mozilla.cfg" "%ProgramFiles%\Mozilla Firefox\" If exist "%ProgramFiles%\Mozilla Firefox\" copy /Y "%~dp0local-settings.js" "%ProgramFiles%\Mozilla Firefox\defaults\pref" Same worked perfectly with 68.10. Does anyone has any idea what we are doing wrong.