"Benji York"
The express editions are only "free" until November 7th: http://msdn.microsoft.com/vstudio/express/support/faq/default.aspx#pricing
One can keep using any version downloaded before that date, but I would not be surprised to see a bugfix sometime after. There is also this: " 2.What can I do with the Express Editions? ... Evaluate the .NET Framework for Windows and Web development. " and this " 13.Can I develop applications using the Visual Studio Express Editions to target the .NET Framework 1.1? No, each release of Visual Studio is tied to a specific version of the .NET Framework. The Express Editions can only be used to create applications that run on the .NET Framework 2.0. " 'Free' is not always free. This appears to be a .NET 2 promotion. Perhaps the Firefox people are using the professional version, without such a limitation? Terry Jan Reedy