Using Firefox HTML source viewer in VB.NET?

I want to view the HTML source of a web page, I’ve using ICSharpCode.TextEditor, Scintilla,… and they’re all good. But, I have missed Firefox HTML source viewer.

I wonder if I can use Mozilla ActiveX Control to open the source viewer or is there a command line argument that make Firefox open it? Thanks!

Using Firefox HTML source viewer in VB.NET?