Hi, I take a look to forums and docs but didn't find answer to it : just found informations about the use of firefox -P Is there a way to change the defaults profile path. For example, in the profiles.ini : Name=default IsRelative=1 Path=Profiles/be7er9lz.default Default=1 this is a relative path referring to %appdata%\Mozilla\Firefox\[PathVariableValue] Is there a way to change a config file or config to customise the path for all users a windows computer ? For example : setting this variable to \\nameofserver\Firefox\ will made all relatives profiles looking for : \\nameofserver\Firefox\[PathVariableValue] without this option, I should be obliged to edit all users profiles.ini to change path to absolute Thanks for your help ludovic