Karabiner configuration to changes tabs with the mouse 4 & 5 buttons and open links in a new window when the middle mouse button is pressed

private.xml

<?xml version="1.0"?>
<root>
    <item>
      <name>LKM Button 4 5 to Tab Back Forward</name>
      <identifier>private.my_button_4_5_to_tab_back_forward</identifier>
      <autogen>
        __KeyToKey__
        PointingButton::BUTTON4,
        KeyCode::TAB, ModifierFlag::CONTROL_L | ModifierFlag::SHIFT_L
      </autogen>
      <autogen>
        __KeyToKey__
        PointingButton::BUTTON5,
        KeyCode::TAB, ModifierFlag::CONTROL_L
      </autogen>
    </item>
    
    <item>
      <name>LKM middle mouse to open a new tab</name>
      <identifier>private.my_button_3_to_command_click</identifier>
      <autogen>
        __KeyToKey__
        KeyCode::COMMAND_L,
        PointingButton::LEFT,ModifierFlag::COMMAND_L
      </autogen>
    </item>
    
    <item>
        <name>LKM Command + left/right to change tabs</name>
        <identifier>private.my_button_fn_left_right</identifier>
        <autogen>
            __KeyToKey__,
            KeyCode::CURSOR_RIGHT, ModifierFlag::COMMAND_L,
            KeyCode::TAB, ModifierFlag::CONTROL_L
        </autogen>
        <autogen>
            __KeyToKey__,
             KeyCode::CURSOR_LEFT, ModifierFlag::COMMAND_L,
            KeyCode::TAB, ModifierFlag::CONTROL_L | ModifierFlag::SHIFT_L
        </autogen>
    </item>
</root>