Keyboard shortcuts / hotkeys and buttons

Reddit has the hotkeys for previous / next post, P / N.

Such hotkeys would be useful here too, same, different, or even custom, e.g. left / right arrow keys.

Buttons for previous / next post would be nice too, so we could open post and then just click to "previous post" button to switch to newer and newer posts, same place, single click, even better as reddit.

Other keyboard shortcuts could be similar to reddit too, upvote, downvote, etc.