Doesn't work well on MacOS. Alt+Shift+arrow means "select a word". The extension still captures the keys in inputs and textareas, effectively making text selection impossible. Also, keys are propagated to every window, so if you have eg 2, you'll see 2 tab changes per one keystroke.

Very needed feature (most recently used order) especially with Tree Style Tabs, but also a weak implementation. Looking forward for updates.