Firefox 2.0 may not be due for official release until tomorrow but it’s on their FTP servers today. As you might expect, the main server is taking a battering so I’d suggest UK folks try a local mirror. Nice touches are the search box which dynamically suggests terms, new pages opening on tabs by default and inline spell checking. Best of all though, all of my add-ons updated successfully! One interesting point is the support for the WHATWG specification for storing and persisting state client side, something that is increasingly important for Web 2.0 applications.