Many of our customers asked us how to use Developer Tools in Internet Explorer 8. Well, whilst you have to separately download and install developer toolbar for Internet Explorer 6 and 7, you don't have to do so again with Internet Explorer 8. It has been included inside the browser. Simply press on F12 to toggle the Developer Toolbar window. The developer tool in IE8 is much more powerful than IE6 or IE7. But still not too good compared with Firebug in FF. Not bad though for troubleshooting if something goes wrong with IE8.

We also suggest to ask your IE6 users to upgrade their browsers to either IE8 or other modern browsers. This will be good for both your site and your users too. Because not only it's much faster and convenient to use modern browsers, but also they can experience things that cannot be done by IE6.