- Edited
This firefox extention is neat and discrete, you can switch any tab to IE rendering... just right click on the tab title and choose "Switch rendering engine".IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox.
You can also set it up to automatically use the IE engine for some sites (like windows update for example). Check it out:
https://addons.mozilla.org/firefox/1419/