Comment by dredmorbius

... if I am listening to music in YouTube it should be trivial to find the browser tab involved ...

A key reason why I tend to access media through a media player (usually mpv in a terminal, occasionally others), and would favour a Web model which divides textual content, media, retail/commerce, and apps into their own apps.

That is, not an app per retail site, but a retail app which manages payment, reputation, identity, and related tasks. Shoehorning everything into "the Web browser" is a category error IMO.