…was released yesterday. So far, I see no radical differences from its predecessor, which in this case is a good thing. You can now reorder tabs by dragging-and-dropping them, which is neat, and the preferences dialogs have been substantially re-organized for ease-of-use. Also, there’s an option to capture new windows opened by web sites as tabs instead. Given how annoying and distracting I find it when sites insist upon opening new windows, I suspect that this may become my favorite feature in short order.
Details and downloads can be found at Firefox’s home.