I'm using Brave. Vertical tabs don't nest; however, you can group them using Chromium's native groups. In Brave, I can also assign custom keyboard shortcuts, s

I'm using Brave. Vertical tabs don't nest; however, you can group them using Chromium's native groups. In Brave, I can also assign custom keyboard shortcuts, so I have Ctrl+G for starting a new group, and Ctrl+T for opening a new tab in the same group. I've also been a user of Firefox for years, and the tree-style tabs extension are all slightly broken, enough to make me disable them. I also never found much value in nesting.