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.
You can download the public version on the project page on Mozilla website.
You can compare each version with the changelog page.
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! 👍