Simple keys for file/folder navigation

First key is Fn+Context Menu (right click); (icon looks like a vertical rectangle with horizontal lines);(you can easily map this in your keyboard short-cuts in gnome settings) (on my machine its a two finger touch anywhere to activate, its faster than key combos)

Second is alt+Enter brings up properties dialogue

You can use alt+up arrow to move one dir back (backspace works too)

"Home" key takes you the first file/folder in dir

"End" key takes you to the last folder/file in dir