It seems like a common question on Google, but I couldn't find a satisfactory answer (unless the answer is 'no')
I would like to add menu items or show a custom menu when a user right-clicks on my Silverlight app.
The closest thing that I found catches the context menu in IE, but not in Firefox, and Chrome shows the context menu and then shows the custom event.
(The tutorial I mentioned was here http://silverlight.net/blogs/msnow/archive/2008/07/01/tip-of-the-day-14-how-to-right-click-on-a-silverlight-application.aspx)