In web browsers, there is only one concept.
There is no concept of "up one level in the heirarchy". If you want that make your own button in your website.
https://lifehacker.com/how-to-move-up-one-url-level-in-chrom... *shrug*
This statement makes no sense to non-tech people. Most people don't think of sites hierarchically, at least not from a url path perspective.
Going from an image to a root domain is not a hierarchy and as a pathological data hoarder who has downloaded a lot of images from a lot of sites I don't understand why I'd ever want that feature. It's wild that that's their first example use case on the article.
Similarly, going from page N of results to page 1 isn't "up a level in heirarchy".
*Edit - I left this in the wrong place, those extensions behave slightly differently.
I miss that feature. And that era.