Internet Explorer is a browser developed by Microsoft. Utilu IE Collection contains multiple IE versions, which are standalone so they can be used at the same time. This is useful for web developers. In the standalone versions Conditional Comments work exactly the same as in the native versions. The original version number is shown correcty in the User Agent string. The version number can be found in the window title too. Utilu IE Collection includes the Internet Explorer Developer Toolbar. This Explorer Bar provides a variety of tools which make troubleshooting websites easier. Utilu IE Collection has the option to install the Firebug Web Development Extension for Internet Explorer. Firebug provides a lot of useful tools which make web development easier.