Try using the full offline installer when installing Firefox via command line. https://www.mozilla.org/en-US/firefox/all/

You may have to specify the full path to the Firefox installer in case you do not start bat/cmd file in the folder where you saved the file.

This is the command line I use. the-edmeister I already downloaded the offline installer but still the same.

@ECHO. @ECHO Installing Firefox @start /wait "C:\TMP\Firefox Setup 40.0.3.exe" -ms

I also used this one but also error "the installation package cannot be opened" @echo off

Echo Installing Firefox

msiexec.exe /i "C:\TMP\Firefox Setup 40.0.3.exe"

Pause

End

You need to add an extra "" as the second parameter is the command (the first is the title).

@ECHO.
@ECHO Installing Firefox
@start /wait "" "C:\TMP\Firefox Setup 40.0.3.exe" -ms

• https://technet.microsoft.com/en-us/library/bb491005.aspx

Cor-el It Works! thank you for help!

@Start /wait "Firefox" "C:\TMP\Firefox Setup 40.0.3.exe" -ms

You're welcome.