Uses ctrl-shift arrow, which has been used for text selection for over 30 years. This is not configurable, and causes your tabs to jiggle and move with every keypress of that combination.

It hasn't been updated in years, so I don't see this changing.

The only thing this add-on did was break my tree. Or maybe I don't know how to use it, but given that there is no documentation or preferences or menus, I don't see how can I learn.