you close Firefox (or even across launches!). Internet Explorer 7+ Avant Browser ( http://www.avantbrowser.com/ ) or Maxthon Browser ( http://www.maxthon.com/ ) free, closed-source "replacements" ( Trident  wrappers, actually) for Internet Explorer. These browser enhancements uses the Internet Explorer "engine" (so you get the same page layout and compatibility with IE-friendly sites),