This "context switch" cost of moving from keyboard only to keyboard+mouse (or mouse only) is why I always have both VimFX for keyboard controls in FireFox, and

This "context switch" cost of moving from keyboard only to keyboard+mouse (or mouse only) is why I always have both VimFX for keyboard controls in FireFox, and FireGestures, for mouse-only tools for doing most things. Whether I'm leaning back in my chair with a hand on the mouse, or sitting forward with both ands on the keyboard, I can have all or most functionality available without having to reposition.