Something I've noticed in vimium-c and Surfingkeys that I'd be curious to confirm for regular Vimium if anyone has a moment: if you press ? to bring up the shortcuts window, it doesn't get autofocus in Orion like it does in Chrome or Safari, so pressing Escape doesn't close it. You have to click on the window to focus on it, then press Escape again. That's a small thing, but it's an irritant and I think it affects all similar extensions.