At work, where I’m forced to use Windows Vista, I use Google Chrome exclusively. And a thing I’ve grown to love about Chrome, is how it handles moving tabs, which is slightly different—and better—from Safari 4b, which I use at home.
In Safari, you grab the small lined area at the top left of a tab to start dragging, something introduced with Safari 4, where before the entire tab was draggable. Once you start dragging, the semi-transparent tab follows your mouse arround until you let go of it, whereupon it either integrates itself into a row of tabs or into a new window. Most annoyingly, Exposé doesn’t work while dragging tabs.
In Chrome, you can initiate dragging anywhere on the tab, and if the tab is the last remaining member of a window, that window will disappear when you start dragging. This allows you to move a tab into a window behind the current, without first rearranging windows; quite nice in Windows’ maxmized windows regime.
Dear Apple: Please steal some of these interface tricks for Safari.
PS: I would switch to Chrome on OS X in an instant, if I could; extensions or no.