A Firefox add-on which goes up a folder of a website.
Open the panel from the address bar to display folders then click on the one you want to load.
Otherwise, use the Alt+Up and Alt+Down shortcuts to navigate through folders.
More details on first run page.
Screenshots are taken from 4.2.0 version.
Discover what happened to the add-on during the last 13 years on the timeline website.
I spent many hours to develop and improve this add-on. So if you like it, take some minutes to rate it. Thanks you a lot!