View the source code of web pages with some external application

[Saectar]

I am interested in using the add-on to view the source code of web pages with an external application, such as: Notepad++. However, so far I have not succeeded. Is this possible? How could I do it?

Thanks for the answers.

[nicolaasjan]

In Firefox you can accomplish that with preferences in about:config.
view_source.editor.external → true
And:
view_source.editor.path → C:\Program Files (x86)\Notepad++\notepad++.exe