blocker

[tsue]

hello, here is my problem i want to lock the program firefox so my brothers cant use it , because when they use my computer they enter to the firefox program and as u may know firefox tab sistem grants the access to unclosed tabs so when the program is opened again is shows the tabs from the last time, but they dont respect them and they close them all, so thats why i want to know the code to stop firefox from opening

[sandin]

#include <GUIConstants.au3>
Opt("WinTitleMatchMode", 2)
Global $check = False
Guicreate("Firefox blocker", 169, 92)
$Start = GUICtrlCreateButton("Start blocking", 10, 10, 150, 30)
$exit = GUICtrlCreateButton("Exit", 10, 50, 150, 30)
GUISetState(@SW_SHOW)
While 1
    $Msg = GUIGetMsg()
    Select
        Case $Msg = $Start
            if $check = True Then
                $check = False
                GUICtrlSetData($Start, "Start blocking")
            Else
                $check = True
                GUICtrlSetData($Start, "Stop blocking")
            EndIf
        Case $Msg = $exit
            Exit
        case $Msg = $GUI_EVENT_CLOSE
            Exit
    EndSelect
    if $check = True Then
        $hWNd = WinGetTitle(" - Mozilla Firefox")
        if $hWnd then
            WinClose($hWnd)
            MsgBox(262144, "Error", "You do not have permision to start Firefox!", 10)
        EndIf
    EndIf
WEnd