[Serguei Kouzmine]

нужен !

Код:

@echo off
setlocal enableextensions enabledelayedexpansion
set user=%username%
set sRootFolder=C:\Users\%user%\AppData\Roaming\Mozilla\Firefox\Profiles
if exist "%sRootFolder%\." (
	for /f "usebackq delims=" %%i in (
		`2^>nul dir /b /a:d /o:-n "%sRootFolder%\*.*"`
	) do set sSubFolder=%%~i
echo copy "%sRootFolder%\!sSubFolder!\*.*" "c:\temp\"
)
echo %sSubFolder%
endlocal
exit /b 0

дает

Код:

copy "C:\Users\Serguei\AppData\Roaming\Mozilla\Firefox\Profiles\07p9upxo.default
\*.*" "c:\temp\"