[lewisl9029]

Wow, and here I thought I was the only one to make this move from Firefox to Edge, precisely because of the excellent native vertical tabs functionality.

It's not perfect, but the level of UX polish and the first-class integration with other browser features is unmatched by any Firefox vertical tabs extension I've tried.

I still can't believe the other browsers haven't caught on to the fact that power users want vertical tabs and are willing to switch browsers for it after so many years of Firefox extensions showing the way...

[gnicholas]

Orion (Mac only) has a great implementation, and in my experience has been quite fast. It's also supposed to be good on battery life, though I've not really tested it.