# Falkon Python Tutorial - 4. Adding entry to the extension menu

Hello, in this chapter I will show you how to add an entry to the extension menu.
The extension menu is located at `Tools`: `Extensions`.

![Extension menu](../images/py_tutorial4/ExtensionMenu.png)

In this example extension you will see popup [message box](https://doc.qt.io/qtforpython/PySide2/QtWidgets/QMessageBox.html) with 'Tutorial 4 - Message from extension menu' after you click on the menu entry.

![Extension menu](../images/py_tutorial4/MessageBox.png)

To add an entry to extension menu the `populateExtensionsMenu(self, menu)` method has to be implemented in plugin class.  
The reason can be found in the [source code](https://github.com/KDE/falkon/blob/master/src/lib/plugins/plugininterface.h)

The parameter menu is the menu into which the new entry / action will be added.

```python
    def populateExtensionsMenu(self, menu):
        action = Falkon.Action(
            "Tutorial 4 - Extension menu entry",
            menu
        )
        action.triggered.connect(self.onExtensionMenuTriggered)

        menu.addAction(action)

    def onExtensionMenuTriggered(self):
        msgBox = QtWidgets.QMessageBox()
        msgBox.setText('Tutorial 4 - Message from extension menu')
        msgBox.exec_()
```

The full code can be found at [extensions/Tutorial4](../extensions/py_tutorial4)

**Note:** Always create an instance of Action in `populateExtensionsMenu`.
It will be deleted / destroyed when the menu is hidden.  
Do **not** try to add keyboard shortcut to the action used to construct the menu, it will not work properly.