With tabs, I lose screen real estate, it's an extra bar that takes up part of my screen. I lose the ability to alt/tab. Sure, I can ctrl-tab, but I lose the preview/title of the document and I can't go from an outside application to the webpage that I want. Why in the world does anyone like tabs? "Well, IE6 doesn't have them!" "So what?" "Well . . . so IE6 doesn't have them!" "Yeah, you said that, why are tabs a good thing?" "Uhm, erm, stop asking such hard questions!"
This is a great app, truly it's an amazing app.