On iOS you've got link previews on long press which might be similar to what your looking for. There's probably a way to do it on osx as well. That wouldn't so

On iOS you've got link previews on long press which might be similar to what your looking for. There's probably a way to do it on osx as well. That wouldn't solve my problem though, for me tabs are a way to queue other paths to take in a way of reading that's naturally branching. For example, reading an article in Wikipedia might lead to 3-4 more I want to check out, but the preview system doesn't work because visiting each of those will probably give me 3-4 branches more. I'm basically doing recursive reading over a potentially infinite-depth structure, so there is no guarantee that I'll ever resurface to the upper node.