[ldom66]

Try vertical tabs. I fell in love since I've been using it daily. Zen has a special flavor of vertical tabs where pinned tabs open links in a modal, which I now can't do without, and can be reset to the original url with a middle click. I use that all the time for HN, mail, youtube, claude, etc. I believe Waterfox also has a neat implementation of vertical tabs as smart trees.

[upfrog]

I really don't like the idea of vertical tabs, but given how so many web pages these days work, I should probably give them a try. That said, the tree-based approach is fascinating - points to Zen (and related efforts) for trying such a different paradigm for arranging tabs.