Automatic NTLM Logon for ASP.Net, TFS & SharePoint sites with IE & FireFox

NTLM Authentication for websites is a great addition to the bat-belt when writing ASP.Net sites. Additionally it is also a great to have support for it in Team Foundation & SharePoint portals. However as great as having support for NTLM authentication may be, having to enter & re-enter your credentials when surfing Intranet or Extranet sites can be an annoyance that is just not worth it.