Simple and effective. I use it all the time. Thank you!

The addon Usable Home Button does something similar when navigating, but it jumps all the way up to root level. This addon Navigate Up allows you to step through the directories one level at a time before reaching the root domain. Ah, that's better.

Thanks for giving us back some of the functionality we lost when Firefox 57 killed the old Navigate Up extension. This is not a perfect replacement for the old extension, but it works.

It works as advertised. Thanks much. My only suggestion is to implement the feature (mentioned by at least one other here) where I have the option to put the button in the location bar.

Exactly what I needed to replace Uppity! Left-click the toolbar button to go up a single item or right-click to select from the full hierarchy.

I like it. I would like to have the option to hide the urlbar icon and simply use the shortcut, if this is possible.