Autohotkey：Firefox上的热键没有执行应有的功能

Question

I just want W to correspond to the Up Arrow key and S to correspond to the Down Arrow key, and work just like they do, and for A/D to move the focus to the last/next tab.

When i hold S , the page skips down erratically and then Firefox opens the "Save as" window multiple times.

When i hold W , the page skips up erratically and then multiple tabs are closed.

D does what it's supposed to, and A straight up doesn't work.

    #IfWinActive ahk_exe firefox.exe

    w::
    Send {Up}  ; Move page up.

    s::
    send {down} ; Move page down.

    a::
    send, ^{pgup} ; Go to tab on the left.

    d::
    send, ^{pgdn} ; Go to tab on the right.

    #IfWinActive

    Return

What exactly is happening? It should work normally but it isn't.

Answer 1

#IfWinActive ahk_exe firefox.exe

    w:: Send {Up}       ; Move page up.
    s:: send {down}     ; Move page down.

#IfWinActive    ; turn off context sensitivity

The above examples are known as single-line hotkeys because each consists of only one command.

To have more than one command executed by a hotkey , put the first line beneath the hotkey definition and make the last line a return . For example:

#n::
Run http://www.google.com
Run Notepad.exe
return

https://autohotkey.com/docs/Hotkeys.htm#Intro