As a back button maximalist, I can help:
  • on mobile, you can one finger swipe right
  • on desktop, ctrl-[
  • on a laptop trackpad, usually 1-2 fingers swipe right
Other benefits of using the back button on SN:
  • we restore your scroll position and if you had hit "more," "more" remains there when you go back
  • if you back button to your notifications, we highlight the notification you originally clicked and your new notifications remain highlighted
We put a lot of effort into making the back button work well should you choose to use it.