Horizontal tabs, tab groups, seems native Firefox is almost if not at the point where I don't need an extension for tabbing any more, which would be great in my

Horizontal tabs, tab groups, seems native Firefox is almost if not at the point where I don't need an extension for tabbing any more, which would be great in my books. (Currently and for almost a decade using Sidebery. The containers integration and 'panels' is what I think might still be missing for me to switch. I'd probably sacrifice the former, but I love panels.)