Hi there We deploy Firefox through a SCCM server. The same package is installed on FAT clients and on a Citrix server. The installation on FAT clients works without any problemy, this means the interface is german. But on the Citrix clients the interface is english. what could be the reason? >> This is the command line for install "Deploy-Application.exe -AllowCancel No -ForceClose Yes -ScriptTimeout 1800 -MSIArgs 'ADDLOCAL=LANGS,FFD CP_EXT=1 CP_FILENAME=mozilla CP_DEFAULT="NO" REINSTALL=ADM'" >> and in the mozilla.cfg I have the following lines lockPref("intl.locale.requested", "de"); lockPref("intl.locale.matchOS", true); I think the Citrix Environment is an EN server with a language pack. The FAT clients are installed in german. what could be the cause for that problem? thank you for every help!!!