This Firefox Extension IE Tab help web developers who wanted to see how their web page appears within Firefox and Internet Explorer, without having to use Internet Explorer. If you’re a regular web user, you might stumble across a web page that appears irregular within Firefox and you need Internet Explorer to view the page correctly.
IE Tab is an extension for Firefox that enables you to view Internet Explorer content within Firefox, in its own tab.
This is exactly what I was looking for, but not quite. I thought it would allow me to use the IE engine without having to run Windows, but it just embeds the already installed IE in a Firefox tab and isn’t available for Linux.