@grunfink@comam.es @iwojima@clubcyberia.co @sn4il@blog.sn4il.site hm, could be an approach but when having multiple tabs open, maybe even on different social medias and instances, I think the icon of the instance is more representive and recognizable than individual user icons. However, from another aspect when only using a single site and having multiple user profiles open (for whatever reason) this could also make sense (even I never had that case). However, in general I would more expect the site's logo.
If you like, you can have a look at my simple PR:
https://codeberg.org/grunfink/snac2/pulls/109