Many shortcuts bothers my mind. Finally i choose really useful shorcuts is bellow.
unmapAll
map gi focusInput
map gg scrollToTop
map << moveTabLeft
map >> moveTabRight
map gu goUp
map gU goToRoot
Setting page is here.
chrome-extension://dbepggeogbaibhgnhhndojpepiihcmeb/pages/options.html
( Umm but what is that URI? i think maybe it is like a randomized application id or other )