Cross browser testing on IE and FireFox is now supported in Visual Studio Test Tools with the release of the UI automation plugin for Mozilla Firefox.
The primary scenario we want to target with the plugin is that you record a test in IE, and play the same test back in Firefox. In VS2010, you can create a test by recording your web application opened in Internet Explorer. With this plugin, you can run the same test (Coded UI Test or the Action Recording strip) on your web app, this time opened in FireFox.
The current release supports Firefox 3.5 and 3.6. It’s easy to use – just download the feature pack from here: http://msdn.microsoft.com/en-us/vstudio/ff655021.aspx
I am eagerly looking for feedback on this plugin – do let me know what you think.