"^(chromium|org.pwmt.zathura|brave-browser|FoxitReader)$"
    None, Up, Button4, 2
    None, Down, Button5, 2
    Shift_L,   Up,   Shift_L|Button4, 4
    Shift_L,   Down, Shift_L|Button5, 4
    Control_L, Up,   Control_L|Button4
    Control_L, Down, Control_L|Button5

"LibreWolf"
    None, Up, Button4, 2
    None, Down, Button5, 2
    Shift_L,   Up,   Shift_L|Button4, 4
    Shift_L,   Down, Shift_L|Button5, 4
    Control_L, Up,   Control_L|Button4
    Control_L, Down, Control_L|Button5

"^(discord|ferdi|spotify)$"
    None, Up, Button4, 3
    None, Down, Button5, 3