how to get rid of security message box from gecko webbrowser

Question

I'm using gecko webbrowser control in my winforms app, it's belonging to firefox browser.

When I navigate to www.facebook.com I get this messagebox immediately :

it's really annoying , I tried to press enter by code when my webbrowser loses focus but it doesn't work.. how to get rid of it ?

Answer 1

Application.OpenForms[1].Close();