Eagle Eyes’s most exciting (and highly anticipated by developers) feature is its wide support of Mozilla-based add-ons. Though IE 8.1 duly notes that not all plugins will work perfectly, we have tested four popular Firefox plugins (Firebug, Web Developer, Tab Mix Plus, and No-Script) and they worked flawlessly (some of the developers even claim that – in terms of performance – they work much better under IE 8.1 versus Firefox 3).
If the JavaScript "performance" graph reflects seconds to render the benchmark, then at least that looks believable.