Uh, sorry, Camino lacks this option. But don't get angry, get FIREFOX! it has all the speed, features (lots more features, actually), and ease of use of Camino. Open up FireFox and then download a great extension call "MiniT." This will allow you to drag and rearrange your tabs around in one window, or drag tabs to another window to group them together as you please. Dragging tabs around is something you get hooked on fast and the only (free) browser that can do that is FireFox. There's plenty of other ways to customize FireFox but I'd thought I'd mention a great available feature that, IMO, should be standard in all tabbed web browsers.