Extremely useful add-on (extension) for Firefox. Simply put, it enables you to run Internet Exploder(IE) in a tab within Firefox. So that you can easily switch between the two browsers in the same window. This naturally allows you to check on how a page looks in each browser for testing purposes. Of course the big win is that much more convenient to surf with firefox since those pages that you just need to view in IE are now viewable with the click of a button. Another notable feature is that the add-on allows you to set pages to always open in IE, which is good for repeat viewings of the aforementioned IE only pages Install it now IE Tab home page