Although most of the time, browsers other than Internet Explorer – Mozilla Firefox, Google Chrome, Opera, are stable enough for daily usage, but there are certain times that some web pages, especially those Internet-Explorer-optimized one such as Microsoft.com, it would be a better idea to render them in IE core to avoid any problems.
What if a Mozilla Firefox user want to do internet surfing all in one application only, without open up another IE instance? Yes, you can. There is a plug-in called IE Tab for Firefox, developed by a Chinese, but unfortunately, it seems that he has stopped the development of the plug-in and it has no longer work with Firefox 3.6 and higher.
Luckily, quaful has made another similar plug-in, called Coral IE Tab, which fully compatible with Firefox 3.6. Not only that, claimed by the author, Coral IE Tab is an enhanced version of IE Tab which enables you to use the embedded IE engine within tabs of Mozilla Firefox. It supports Adblock Plus in IE, and can sync cookies between IE and Firefox.
By reading some comments for the plug-in, it seems it has some minor bugs for rendering, but so far I have no problem using it to render IE-only pages in my Firefox 3.6. A big thanks to quaful for the wonderful plug-in and hopefully it will get updated frequently to be more stable.