Rated 5 out of 5 stars

#MaxHotkeysPerInterval 200
DoWeNeedToFireMouseWheel()
{
MouseGetPos, x1, y1, hw1
if (y1 >= 0 && y1 < 80 && WinActive("ahk_class MozillaWindowClass"))
return 1
}
#If, DoWeNeedToFireMouseWheel()
WheelUp::
Send ^+{Tab}
return
WheelDown::
Send ^{Tab}
return
#If

Uh, thanks. Good to know there are alternative solutions, I guess.