Custom keyboard shortcut to open,focus, close the bookmark sidebar

I have surveyed old posts. The sidebar is great. A keyboard shortcut to open, gain the focus and close (toggle) this sidebar would be wonderful. You could allow custom shortcuts to be added as well. This would solve it. Whatever is easier on the developer side. Thanks!

THis ^

Seems soo obvious and easy to add. Please give us a toggle shortcut option.

In Librewolf, the shortcut is Ctrl-B