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[Admini]

teraz widzisz różnicę, którą chcę, aby była jak w przeglądarce Vivaldi

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Thanks for the videos, I get it now.
Seems it is similar to "up one level of the URL".
This feature may be not so useful because of wide use of pseudo-static URLs.
By the way, you may do it with a JavaScript bookmarklet:
javascript: (function(){location.href=location.href.substring(0,location.href.substring(0,location.href.length-1).lastIndexOf('/')+1);})();