I love how Internet Explorer would colour-code tabs that were opened from another tab (open in new tab). It worked really well for search engine results; openin

I love how Internet Explorer would colour-code tabs that were opened from another tab (open in new tab). It worked really well for search engine results; opening a bunch of results in new tabs would visually group them together by coloring those tabs differently. Similar in concept to Chrome tab groups, except completely automatic, which is super useful. It was easier to keep track of same-site tabs because they tended to be in different colour groups, or all in the same group, and I think IE had a minimum tab width that was actually usable. If I remember right, you could also move an unrelated tab into a group by dragging it between two tabs in the group, although this seemed like an unintended feature.