We had only to open the IE Tab options menu, add the site to the extension's filter, and reload the page everything worked as expected. Sure enough, many of the sites failed to load properly in Firefox and gave us error messages informing us that Internet Explorer was required. In order to find fodder for testing the extension we consulted a Web page titled 'Sites that Make Firefox Sad,' which provided us with a lengthy list of sites that are still demanding the use of Internet Explorer. IE Tab for Firefox installed easily and was ready for action after we restarted the browser. It's a brilliant solution to the problem of switching back and forth between two different browsers. This clever extension lets you open IE-only Web sites within Firefox. If you find yourself doing the same thing even though Firefox is your browser of choice, try IE Tab for Firefox. We don't like Internet Explorer, but we keep it around, because every now and then we encounter some dinosaur of a Web site that can't be viewed without it.

Firefox ie plugin