Mozilla revealed some information and a video of Tab Candy, a new tab management feature that will make its debut in Firefox 4. Looks like a quite handy feature, it gives you an instant overview of all open tabs, it enables you to create groups and to organize your space.
With one keystroke Tab Candy shows an overview of all tabs to allow you to quickly locate and switch between them. Tab Candy also lets you group tabs to organize your work flow. You can create a group for your vacation, work, recipes, games and social sites, however it makes sense to you to group tabs. When you switch to a grouped tab only the relevant tabs are shown in the tab bar, which helps you focus on what you want.