It is far from perfect; You don’t get to have a dedicated button to close tabs, for instance. But it’s beautiful!
Currently, on Beta and Nightly, version 129, to be exact, has two variables.
sidebar.revamp
sidebar.verticalTabsTurning these bools to true and restarting Firefox will get you the new Vertical Tabs!
Now, the only thing missing (at least for me) is Tab Grouping. I sincerely hope they’re working on something like Google Chrome does because they have this covered really well. Looking forward to that update as well!
