One of the most usefule features of Firefox besides tabbed browsing, and the ability to easily extend the UI and functionality is the ability to highlight text on a webpage right click and then left click "search web for xxxxx" or "search dictionary for xxxxx" with the results opening in a new tab browse window. Anyone that thinks that the taskbar can substitute for tabs doesn't do much research on the web or has a 36" monitor with a 6 inch high taskbar.  The folks working on IE7 need to hear what the users that live in  browser land are saying by switching to Firefox. My browser history is Mosaic, Nescape Navigator, IE, Firefox. Each change facilitated a better browing experience. I and many of my peers will change again if we are offered a better browsing experience. BTW I am a Microsoft OEM. Don't sell or support nix, so my position isn't based on any political position relative to MS.