Firefox4 (current beta), with which I'm playing around these days has introduced a new tab organizing feature, called groups. Basic idea is simple; instead of having them all in one pile, you separate them, so your chaos is now neatly organized into groups.
Just one thing bothers me - I cannot quickly switch between groups with a keyboard shortcut. Anyone knows a way how to do that? Or some custom extension (which I've also not been able to find)?