Good news for Firefox users who have lusted over Chrome and Safari's option that lets you "tear" away tabs from an open window. The latest build of 3.1--and it works marvelously.
As in Google's Chrome and Apple's Safari browsers you simply pull away a tab from the interface and it turns into its own window. Likewise you can drag it back into an already opened window, just like you'd do to re-order your existing tabs.
While not a ground-breaking feature, tab tearing is a large step forward in changing the way we interact with our browsers. It's a cross between the idea of having multiple tabs and multiple windows, but does not relegate the user to being pigeonholed in either one permanently.
Below is a quick demo of how the new tear-away feature works, both with dragging tabs and choosing to open them via contextual menu.